---
product_id: 53600610
title: "Periodic Audio “Be” Beryllium diaphragm in-ear headphones assembled in USA"
brand: "periodic audio"
price: "16415794₫"
currency: VND
in_stock: false
reviews_count: 8
url: https://www.desertcart.vn/products/53600610-periodic-audio-be-beryllium-diaphragm-in-ear-headphones-assembled-in
store_origin: VN
region: Vietnam
---

# 32Ω impedance for balanced power Beryllium diaphragm for ultra-clear sound Assembled in USA for quality assurance Periodic Audio “Be” Beryllium diaphragm in-ear headphones assembled in USA

**Brand:** periodic audio
**Price:** 16415794₫
**Availability:** ❌ Out of Stock

## Summary

> 🎶 Be the sound connoisseur your peers envy — clarity that commands attention.

## Quick Answers

- **What is this?** Periodic Audio “Be” Beryllium diaphragm in-ear headphones assembled in USA by periodic audio
- **How much does it cost?** 16415794₫ with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/53600610-periodic-audio-be-beryllium-diaphragm-in-ear-headphones-assembled-in)

## Best For

- periodic audio enthusiasts

## Why This Product

- Trusted periodic audio brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Precision-Tuned Sound EQ:** Engineered for rich, detailed bass and articulate mids that reveal every nuance in your favorite tracks.
- • **Lightweight & Comfortable Fit:** Designed with a plastic body and foam tips for all-day wear without fatigue, perfect for busy professionals on the move.
- • **Exclusive USA Assembly & Design:** Feel the pride of owning headphones assembled domestically, blending cutting-edge tech with meticulous quality control.
- • **Built to Last with 5-Year Warranty:** Periodic Audio stands behind their craftsmanship, offering rare long-term support for peace of mind.
- • **Audiophile-Grade Beryllium Diaphragm:** Experience pristine clarity and dynamic bass with advanced beryllium drivers usually reserved for $2K+ gear.

## Overview

The Periodic Audio Be in-ear headphones feature a premium beryllium diaphragm delivering exceptional sound clarity and deep bass response. With a 32-ohm impedance and lightweight plastic housing, they offer comfort and precision tuning ideal for discerning listeners. Assembled in the USA and backed by a 5-year warranty, these wired IEMs represent a high-value investment for audiophiles seeking professional-grade audio on the go.

## Description

desertcart.com: Periodic Audio “Be” Beryllium diaphragm in-ear headphones assembled in USA : Electronics

Review: A fantastic sound EQ let down slightly by build quality - Note: my review is for the V1 of the Be. V2 actually addresses a lot of the issues I have with it (cable and splitter). Pros: Fantastic sound eq, bassy and yet still detailed. You can really get that rumble from the sub bass if you have them inserted correctly. Case is simple yet effective. Light and comfy when inserted correctly and worn over the ear. Definitely sensitive / accurate enough to pick up differences in audio sources. Cons: Metal divider on cable is chunky and gets caught on clothes. Cable and IEM body housing feel cheap and conduct clothing noise. Foam tips are impossible to get onto the wide bore. Wide bore is too wide for some ears and causes discomfort over time. Impossible to tell right from left earpiece in the dark (only differentiation is a red-sharpied grill in the right ear piece). Price should be $100 cheaper (but this is possible to achieve by buying the 'blemished' version on their website) Dan and company spent a ton of time on engineering these things and actually came to the conclusion that a plastic body on the IEM saves precious weight and has better acoustic properties than metal. This still makes them feel a bit cheap - your coworkers will look at you funny when you say that you spent $300 on "cheap earbuds". Overall though, I bought them for the sound, and that has continued to be fantastic over my period of ownership. I will also note that Periodic Audio stands by their products for a full 5 years and actually really seems to care about their customers, which is rare for a lot of Chinese-made audio companies.
Review: Periodic Audio Beryllium (Be) iems: 2 Be or not 2 Be? A Hate/Wait/Love Story in 3 Acts. - Cliff Notes Version After a horrible start and a very long time in training, these “Be-came” so good that I purchased 2 Be. “Be-cause” I never wanted to Be without. I also gave away several other iems “Be-cause” I no longer needed or wanted to listen to them. I think the Periodic Audio Be are one of the greatest bargains in audio at $300. Very Highly Recommended. The Be has a captive cable. I wish I could try my favorite cable with the Be, but cable swapping is not allowed. Maybe the next version of the Be will allow that. Prologue Beryllium in speakers can really Be something very special. About 30 years ago, I heard beryllium as a tweeter in the Yamaha NS500 speakers. “Be-ing” a college student of modest means, I took extra yearbook photography assignments and at the end of the term, I took everything out of the piggy bank except the squeal and bought a pair. Yes, they were vapor deposition Be instead of solid Be foil, but my ears said they were the best sounding speakers that I could afford then and I voted for them with my paychecks and enjoyed them for years. Today, several very well-regarded speakers for pro, home, and mobile use are blessed with beryllium tweeters. The Focal Solo 6be, Twin 6be, Trio 6be, Trio 11be, and SM9 are among the powered speakers that are generally well respected by the pro audio market. They cost between about $2,5k and $7k per pair. The Focal Utopia home series with beryllium tweeters tops out around $65k per pair. The Focal Utopia 6.5” separates car speakers are about $2k a pair. Then there are the very well-regarded Focal Utopia (open back $4k) and Stellia (closed back $3k) beryllium-based full-sized headphones. How could I resist risking $300 for some Be iems from Periodic Audio? Yes, I ordered them from desertcart and paid for them with my very own money. Act 1: Hate As soon as I extracted my new Be from the well-designed packaging, I plugged them into my iPad Pro to make sure they were working. There was sound coming from both channels. This was important. I noticed that the inside of one channel, visible down the hole in the center of the eartip was blue and the other channel was red. This was an elegant way to determine right and left channel, except for in two instances: in the dark, or if you prefer the Comply eartips with the wax screen that would cover the red or blue parts. One reviewer went on a rant about this. I just applied a very simple and inexpensive fix. Since the outside of each golden endcap is nicely engraved with the Company logo, I put a few coats of my wife’s chip resistant clear nail polish on the right channel’s end cap so it is smooth and the left one has the factory engraving. Now I can easily distinguish the right from the left in whatever conditions allow my fingers to feel. (I added the fire engine red metallic later on the right channel to color code the outside.) Since the Be’s were basically functional, I started training them (I loathe the term “breaking in” as that implies either that some kind of crime is happening, and the cops should stop it, or that something destructive is happening. I prefer the term “training” as in “Train up an iem in the way it should go . . .”). Initial training material included Celtic Woman “A New Journey”, Burmester “Art for the Ear”, Berlin/von Karajan “Holst: The Planets”, Michael Card “Starkindler” and Rick Wakeman’s “Merlin”. All were “.wav” files playing on my iPod pro set to repeat all with the volume about a solid forte (volume slider between the pause/play indicator and the next track indicator). Shortly thereafter, I nearly blew it. I know it’s not fair to listen critically after only 13 hours of training, but I couldn’t help myself. I rationalized that I should check the Be progress and target the remainder of the training for the problem areas (if any). So I stuck ‘em in my ears and plugged them into my Roon/Hugo2 and listened up. Here There Be Bass - good, solid, detailed, layered, one of the three best jobs with Enya Watermark bass lines I have ever heard in iems or headphones with my Hugo2 (Jerry Harvey Layla 2 with Silver Dragon cable tops the iem chart for me, and the Fostex 900 with hard-wired Silver Dragon cable for full size headphones). I could tell that for the bass, the Be has the potential to Be something very special. Then I made the mistake of trying a men’s acappella choral group. In just a few notes, I was hit with an intensely negative emotional experience, best summed up by JRR Tolkein’s Gollum screaming: “Nassty, NASSSTY SSIBILANCESSS! It hurts Us! It Hurts Us! We hates it! We HATES IT!” I had to turn off the tunes to shut Gollum up so I could think. (Screeching like that is my worst sonic nightmare. Like several fingernails scraping several chalkboards, it stops further audio processing until it is silenced.) After rational thought returned, I decided that the Be really needed more midrange and treble training to try and make the upper mids and lower treble listenable. I remembered that the Grado 10e’s and RHA MA750’s had similar, but not as glaring, mid/treble issues, which were solved by 5 to 7 days continuous training. I put the Be’s on double secret probation and added sibilance torture tracks like MercyMe’s album “Welcome to the New” on the training playlist. That album actually sounds fantastic through my reference system, but several other systems and less refined iems and headphones can make it screech bigtime. Act 2: Wait Some people tell me that patience is a virtue. To which I usually reply “Yeah, right. I ain’t a doctor and I don’t need patience.” The iPad pro fed continuous music from the Training playlist to the Periodic Audio Be at a good solid forte level for another whole week. That’s 168 hours or half a fortnight. What Happened? I then went back to the Roon/Hugo2 rig and listened to my bass tests first: Bass: Potential for excellence on both acoustic and electronic bass was shown using Major Mackerel’s “Conga Beat the Drum”, Dub Colussus’ “Dub Me Tender”, Kraftwerk “Radioactivity” and “Autobahn”, MercyMe “Welcome to the New” and “Greater,” Rick Wakeman’s “Merlin,” Mannheim Steamroller’s “Prelude/Chocolate Fudge”, Iona “Kells”, and Stephen Wiley’s “Glory to God” from DC Talk’s Yo Ho Ho CD. I say potential for excellence, because there was something about the decay and release of some bass motes that just did not sound quite right, but the bass attack, extension, and the body and layering of the bass notes and sostenuto was as near “spot on” as I have heard through any sub-$1,000 iem or headphone. Mid/Treble: Much improved. Some sibilance remained, but at least the above tracks were listenable without cringing. Gollum’s screaming at me was gone. In general, the mids and treble were nowhere near as detailed, precise, coherent, involving, and attention-grabbing (in a good way) as the bass. If you ever heard one of the ESS Heil or the Carver Amazing loudspeakers, this one-week-of-training sound was the exact opposite. The ESS folded motion transformer and the Carver ribbons made absolutely exquisite music for the midrange and treble, and both were paired with bass sections that sounded like elephants plodding through quicksand by comparison. Conclusion: Continue Training for the second half of the fortnight. Support for this came from a few reviews on Head-Fi. One mentioned 200 hours and another said 250 hours were required. Note to Dan at Periodic Audio: Please emphasize that the Be really needs 10 to 14 days of continuous “Training” or “run-in” to unleash most of their potential. Listening too much before then could make you wish you never bought them. Act 3: Love When music is being played or replayed very well, there is an emotional response. Breathing slows, as if the noise from breathing will shatter the magic of the moment. Heart rate will be affected, racing or slowing as the music carries it along. This is not just getting the notes right. One of my favorite conductors said that getting the notes right does not mean you are making music, you are just not making noticeable mistakes. The bass, midrange, and treble all need to be there at the right time and in the right proportions to permit the possibility of making music. The attack, body, and release of the notes must be right. This elusive ethereal confluence is difficult to achieve through playback, and usually can be fouind only while soaking up the original live event in person. 336. The number of very slow hours in two weeks or one fortnight. The only audio equipment that I have heard of needing more training than that is the new Spectral mono amp – it gets 500 hours before leaving the factory. I have really been enjoying about a month with my now fully trained Periodic Audio Be. Those bass tracks listed above found just about everything I think was missing. I place the Be third on my all-time bass list – behind the Astell&Kern/JH Audio Layla 2 with a Moon Audio Silver Dragon v3 cable and the Fostex 900 (original with Moon Audio Silver Dragon cable “hacked” in). And the Be does this at 1/5 to 1/10 the price. The mids/treble testing included most of the now quite enjoyable MercyMe Welcome to the New album. This, of course, sounded best on the reference rig. Then Quincy Jones’ “Back on the Block” from Burmester’s Art for the Ear. When the female soloist, full jazz choir, and instruments get into a very complex passage, it takes a very good playback chain to handle it without smearing or losing something. At times it can sound sibilant, but it is not. (This was on a Burmester compilation CD that was produced to help sell Burmester systems costing upwards of $100k.) On this track, I realized that Be were the first two letters in “Beautiful” for good reason. With my suspicion confirmed by hearing Radka Toneff “The Moon is a Harsh Mistress” from Art for the Ear, and Celtic Woman’s “The Sky and the Dawn and the Sun”, “Newgrange”, “Caledonia”, and “Mo Ghile Mear” on their A New Journey CD, I thought the Be were ready for the final testing. The Be passed my final “goosebump” tests with great delicacy, insight, and that elusive emotional response. Cecelia Bartoli’s “Exsultate Jubilate” from her Mozart Portraits CD at the right volume is absolutely captivating – especially for the last two minutes. It was all there, the orchestra, the hall ambience, Cecelia’s voice soaring and reverberating from the walls. I rarely hear this reproduced this well. Bria Skonberg’s “Trust in Me” was suitably mesmerizing. Kaa (Jungle Book) could not have done it better. And finally, Celtic Woman’s “Over the Rainbow” from A New Journey brings four female voices: Chloe, Orla, Meav, and Hayley, each a soloist in her own right, into a four-part harmony that just begs for absolute silence to hear the voices interplay with each other and the hall harmonics and to follow the melody weaving from one voice to the next. I suppose that I breathed during the 2:38 of that track, but I do not remember. Yes, I still preferred the Layla 2’s presentation, but the Be handily bested most of the other iem’s I have heard. Conclusion: 2 Be or not 2 Be? Yes. I purchased 2 Be. With my very own money. Be-cause I never wanted to Be without. I think the Periodic Audio Be are one of the greatest bargains in audio at $300. I saw on the Periodic Audio website their Be B-Stock sale, I grabbed one for $149 due to some microscopic cosmetic flaw that I may notice someday. The Be sound better and better as the source tracks and playback equipment get better. The same “.wav” file sounds better on the iPad pro than the iPhone 6 plus. There is a bigger quality jump moving from the iPad pro to the Roon on Dell/Chord Hugo2 and the really good gets much better with the reference rig: Furman 15 dmi/MIT power cords/Melco/Silver Dragon USB with or without Audioquest Jitterbug/Chord Hugo2. I try to keep 2 dynamic and 2 balanced armature iems for comparison purposes in reviews, and to have something to take with me – because the Sennheisers and the Laylas do not leave the house. My current Dynamic Duo are the Periodic Audio BE and the Sennheiser ie 800s. Gone are the Nuforce 700 and 800 series, Klipsch 6 ii, Focal Sphear, and RHA MA-750. The Etymotic ER4s and Grado 10e did not fare well against the Be. Be put them on probation and the Massdrop/NuForce EDC3 iem with an aftermarket Moon Audio Silver Dragon v1 cable sent them away for good. Room for Improvement The Be has a captive cable. Please note that all 3 of my favorite headphones and both of my favorite balanced armature iems had the capability to swap cables and I installed my favorite Moon Audio Dragon (Black Dragon for the Utopias, and Silver Dragon for the NightOwls, Fostex 900’s Astell&Kern/Jerry Harvey Layla 2’s and Massdrop/NuForce EDC3’s.) I wish I could try my favorite cable with the Be, but cable swapping is not allowed. Maybe the next version of the Be will allow that. I have a sneaking suspicion that the Periodic Audio Be with a Moon Audio Silver Dragon would be a better all-around performer than the Sennheiser ie800s, at about half the cost, but we may never know. Final Thoughts If you are thinking of making a roughly $300 “Sound Investment” for in-ear monitors and do not mind waiting a few weeks for them to be trained properly, please put these on your very short audition list. Also on that very short list should be the Massdrop/NuForce EDC3 three Knowles balanced armature iems for $100 (for the drop I was in from Drop.com) with another $200 for a Moon Audio 2-pin iem silver dragon v1 cable for about $200 from moon-audio.com. The combination makes the decision between the EDC3+Silver Dragon and a stock Be very difficult. The two iems do different things. I believe that different people will choose differently, but many will find that a close match, even though they have different strengths and different sound signatures. Short Summary: I think the Periodic Audio Be are one of the greatest bargains in audio at $300. Now I know why Be are the first two letters in Beautiful. Shorter Summary: Berylli-Yum. Delicious sound.

## Features

- Periodic Audio Be (Beryllium)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B073TVZRV4 |
| Age Range Description | Teen |
| Brand | Periodic Audio |
| Cable Features | Retractable |
| Color | Clear |
| Connectivity Technology | Wired |
| Customer Package Type | Standard Packaging |
| Customer Reviews | 3.2 out of 5 stars 19 Reviews |
| Ear Placement | In Ear |
| Enclosure Material | Beryllium,Foam |
| Form Factor | In Ear |
| Headphone Folding Features | In Ear |
| Headphones Ear Placement | In Ear |
| Impedance | 32 Ohms |
| Item Height | 12 millimeters |
| Item Weight | 0.65 Pounds |
| Manufacturer | Periodic Audio |
| Model Number | Be |
| Number of Items | 1 |
| UPC | 855033007034 |

## Product Details

- **Brand:** Periodic Audio
- **Color:** Clear
- **Ear Placement:** In Ear
- **Form Factor:** In Ear
- **Impedance:** 32 Ohms

## Images

![Periodic Audio “Be” Beryllium diaphragm in-ear headphones assembled in USA - Image 1](https://m.media-amazon.com/images/I/511cQpbxIML.jpg)
![Periodic Audio “Be” Beryllium diaphragm in-ear headphones assembled in USA - Image 2](https://m.media-amazon.com/images/I/613QCilYYtL.jpg)
![Periodic Audio “Be” Beryllium diaphragm in-ear headphones assembled in USA - Image 3](https://m.media-amazon.com/images/I/61Cv1bhaS9L.jpg)
![Periodic Audio “Be” Beryllium diaphragm in-ear headphones assembled in USA - Image 4](https://m.media-amazon.com/images/I/61IXsdt87OL.jpg)
![Periodic Audio “Be” Beryllium diaphragm in-ear headphones assembled in USA - Image 5](https://m.media-amazon.com/images/I/61WbDLtmRYL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐ A fantastic sound EQ let down slightly by build quality
*by J***E on May 20, 2019*

Note: my review is for the V1 of the Be. V2 actually addresses a lot of the issues I have with it (cable and splitter). Pros: Fantastic sound eq, bassy and yet still detailed. You can really get that rumble from the sub bass if you have them inserted correctly. Case is simple yet effective. Light and comfy when inserted correctly and worn over the ear. Definitely sensitive / accurate enough to pick up differences in audio sources. Cons: Metal divider on cable is chunky and gets caught on clothes. Cable and IEM body housing feel cheap and conduct clothing noise. Foam tips are impossible to get onto the wide bore. Wide bore is too wide for some ears and causes discomfort over time. Impossible to tell right from left earpiece in the dark (only differentiation is a red-sharpied grill in the right ear piece). Price should be $100 cheaper (but this is possible to achieve by buying the 'blemished' version on their website) Dan and company spent a ton of time on engineering these things and actually came to the conclusion that a plastic body on the IEM saves precious weight and has better acoustic properties than metal. This still makes them feel a bit cheap - your coworkers will look at you funny when you say that you spent $300 on "cheap earbuds". Overall though, I bought them for the sound, and that has continued to be fantastic over my period of ownership. I will also note that Periodic Audio stands by their products for a full 5 years and actually really seems to care about their customers, which is rare for a lot of Chinese-made audio companies.

### ⭐⭐⭐⭐⭐ Periodic Audio Beryllium (Be) iems: 2 Be or not 2 Be? A Hate/Wait/Love Story in 3 Acts.
*by J***R on June 16, 2019*

Cliff Notes Version After a horrible start and a very long time in training, these “Be-came” so good that I purchased 2 Be. “Be-cause” I never wanted to Be without. I also gave away several other iems “Be-cause” I no longer needed or wanted to listen to them. I think the Periodic Audio Be are one of the greatest bargains in audio at $300. Very Highly Recommended. The Be has a captive cable. I wish I could try my favorite cable with the Be, but cable swapping is not allowed. Maybe the next version of the Be will allow that. Prologue Beryllium in speakers can really Be something very special. About 30 years ago, I heard beryllium as a tweeter in the Yamaha NS500 speakers. “Be-ing” a college student of modest means, I took extra yearbook photography assignments and at the end of the term, I took everything out of the piggy bank except the squeal and bought a pair. Yes, they were vapor deposition Be instead of solid Be foil, but my ears said they were the best sounding speakers that I could afford then and I voted for them with my paychecks and enjoyed them for years. Today, several very well-regarded speakers for pro, home, and mobile use are blessed with beryllium tweeters. The Focal Solo 6be, Twin 6be, Trio 6be, Trio 11be, and SM9 are among the powered speakers that are generally well respected by the pro audio market. They cost between about $2,5k and $7k per pair. The Focal Utopia home series with beryllium tweeters tops out around $65k per pair. The Focal Utopia 6.5” separates car speakers are about $2k a pair. Then there are the very well-regarded Focal Utopia (open back $4k) and Stellia (closed back $3k) beryllium-based full-sized headphones. How could I resist risking $300 for some Be iems from Periodic Audio? Yes, I ordered them from Amazon and paid for them with my very own money. Act 1: Hate As soon as I extracted my new Be from the well-designed packaging, I plugged them into my iPad Pro to make sure they were working. There was sound coming from both channels. This was important. I noticed that the inside of one channel, visible down the hole in the center of the eartip was blue and the other channel was red. This was an elegant way to determine right and left channel, except for in two instances: in the dark, or if you prefer the Comply eartips with the wax screen that would cover the red or blue parts. One reviewer went on a rant about this. I just applied a very simple and inexpensive fix. Since the outside of each golden endcap is nicely engraved with the Company logo, I put a few coats of my wife’s chip resistant clear nail polish on the right channel’s end cap so it is smooth and the left one has the factory engraving. Now I can easily distinguish the right from the left in whatever conditions allow my fingers to feel. (I added the fire engine red metallic later on the right channel to color code the outside.) Since the Be’s were basically functional, I started training them (I loathe the term “breaking in” as that implies either that some kind of crime is happening, and the cops should stop it, or that something destructive is happening. I prefer the term “training” as in “Train up an iem in the way it should go . . .”). Initial training material included Celtic Woman “A New Journey”, Burmester “Art for the Ear”, Berlin/von Karajan “Holst: The Planets”, Michael Card “Starkindler” and Rick Wakeman’s “Merlin”. All were “.wav” files playing on my iPod pro set to repeat all with the volume about a solid forte (volume slider between the pause/play indicator and the next track indicator). Shortly thereafter, I nearly blew it. I know it’s not fair to listen critically after only 13 hours of training, but I couldn’t help myself. I rationalized that I should check the Be progress and target the remainder of the training for the problem areas (if any). So I stuck ‘em in my ears and plugged them into my Roon/Hugo2 and listened up. Here There Be Bass - good, solid, detailed, layered, one of the three best jobs with Enya Watermark bass lines I have ever heard in iems or headphones with my Hugo2 (Jerry Harvey Layla 2 with Silver Dragon cable tops the iem chart for me, and the Fostex 900 with hard-wired Silver Dragon cable for full size headphones). I could tell that for the bass, the Be has the potential to Be something very special. Then I made the mistake of trying a men’s acappella choral group. In just a few notes, I was hit with an intensely negative emotional experience, best summed up by JRR Tolkein’s Gollum screaming: “Nassty, NASSSTY SSIBILANCESSS! It hurts Us! It Hurts Us! We hates it! We HATES IT!” I had to turn off the tunes to shut Gollum up so I could think. (Screeching like that is my worst sonic nightmare. Like several fingernails scraping several chalkboards, it stops further audio processing until it is silenced.) After rational thought returned, I decided that the Be really needed more midrange and treble training to try and make the upper mids and lower treble listenable. I remembered that the Grado 10e’s and RHA MA750’s had similar, but not as glaring, mid/treble issues, which were solved by 5 to 7 days continuous training. I put the Be’s on double secret probation and added sibilance torture tracks like MercyMe’s album “Welcome to the New” on the training playlist. That album actually sounds fantastic through my reference system, but several other systems and less refined iems and headphones can make it screech bigtime. Act 2: Wait Some people tell me that patience is a virtue. To which I usually reply “Yeah, right. I ain’t a doctor and I don’t need patience.” The iPad pro fed continuous music from the Training playlist to the Periodic Audio Be at a good solid forte level for another whole week. That’s 168 hours or half a fortnight. What Happened? I then went back to the Roon/Hugo2 rig and listened to my bass tests first: Bass: Potential for excellence on both acoustic and electronic bass was shown using Major Mackerel’s “Conga Beat the Drum”, Dub Colussus’ “Dub Me Tender”, Kraftwerk “Radioactivity” and “Autobahn”, MercyMe “Welcome to the New” and “Greater,” Rick Wakeman’s “Merlin,” Mannheim Steamroller’s “Prelude/Chocolate Fudge”, Iona “Kells”, and Stephen Wiley’s “Glory to God” from DC Talk’s Yo Ho Ho CD. I say potential for excellence, because there was something about the decay and release of some bass motes that just did not sound quite right, but the bass attack, extension, and the body and layering of the bass notes and sostenuto was as near “spot on” as I have heard through any sub-$1,000 iem or headphone. Mid/Treble: Much improved. Some sibilance remained, but at least the above tracks were listenable without cringing. Gollum’s screaming at me was gone. In general, the mids and treble were nowhere near as detailed, precise, coherent, involving, and attention-grabbing (in a good way) as the bass. If you ever heard one of the ESS Heil or the Carver Amazing loudspeakers, this one-week-of-training sound was the exact opposite. The ESS folded motion transformer and the Carver ribbons made absolutely exquisite music for the midrange and treble, and both were paired with bass sections that sounded like elephants plodding through quicksand by comparison. Conclusion: Continue Training for the second half of the fortnight. Support for this came from a few reviews on Head-Fi. One mentioned 200 hours and another said 250 hours were required. Note to Dan at Periodic Audio: Please emphasize that the Be really needs 10 to 14 days of continuous “Training” or “run-in” to unleash most of their potential. Listening too much before then could make you wish you never bought them. Act 3: Love When music is being played or replayed very well, there is an emotional response. Breathing slows, as if the noise from breathing will shatter the magic of the moment. Heart rate will be affected, racing or slowing as the music carries it along. This is not just getting the notes right. One of my favorite conductors said that getting the notes right does not mean you are making music, you are just not making noticeable mistakes. The bass, midrange, and treble all need to be there at the right time and in the right proportions to permit the possibility of making music. The attack, body, and release of the notes must be right. This elusive ethereal confluence is difficult to achieve through playback, and usually can be fouind only while soaking up the original live event in person. 336. The number of very slow hours in two weeks or one fortnight. The only audio equipment that I have heard of needing more training than that is the new Spectral mono amp – it gets 500 hours before leaving the factory. I have really been enjoying about a month with my now fully trained Periodic Audio Be. Those bass tracks listed above found just about everything I think was missing. I place the Be third on my all-time bass list – behind the Astell&Kern/JH Audio Layla 2 with a Moon Audio Silver Dragon v3 cable and the Fostex 900 (original with Moon Audio Silver Dragon cable “hacked” in). And the Be does this at 1/5 to 1/10 the price. The mids/treble testing included most of the now quite enjoyable MercyMe Welcome to the New album. This, of course, sounded best on the reference rig. Then Quincy Jones’ “Back on the Block” from Burmester’s Art for the Ear. When the female soloist, full jazz choir, and instruments get into a very complex passage, it takes a very good playback chain to handle it without smearing or losing something. At times it can sound sibilant, but it is not. (This was on a Burmester compilation CD that was produced to help sell Burmester systems costing upwards of $100k.) On this track, I realized that Be were the first two letters in “Beautiful” for good reason. With my suspicion confirmed by hearing Radka Toneff “The Moon is a Harsh Mistress” from Art for the Ear, and Celtic Woman’s “The Sky and the Dawn and the Sun”, “Newgrange”, “Caledonia”, and “Mo Ghile Mear” on their A New Journey CD, I thought the Be were ready for the final testing. The Be passed my final “goosebump” tests with great delicacy, insight, and that elusive emotional response. Cecelia Bartoli’s “Exsultate Jubilate” from her Mozart Portraits CD at the right volume is absolutely captivating – especially for the last two minutes. It was all there, the orchestra, the hall ambience, Cecelia’s voice soaring and reverberating from the walls. I rarely hear this reproduced this well. Bria Skonberg’s “Trust in Me” was suitably mesmerizing. Kaa (Jungle Book) could not have done it better. And finally, Celtic Woman’s “Over the Rainbow” from A New Journey brings four female voices: Chloe, Orla, Meav, and Hayley, each a soloist in her own right, into a four-part harmony that just begs for absolute silence to hear the voices interplay with each other and the hall harmonics and to follow the melody weaving from one voice to the next. I suppose that I breathed during the 2:38 of that track, but I do not remember. Yes, I still preferred the Layla 2’s presentation, but the Be handily bested most of the other iem’s I have heard. Conclusion: 2 Be or not 2 Be? Yes. I purchased 2 Be. With my very own money. Be-cause I never wanted to Be without. I think the Periodic Audio Be are one of the greatest bargains in audio at $300. I saw on the Periodic Audio website their Be B-Stock sale, I grabbed one for $149 due to some microscopic cosmetic flaw that I may notice someday. The Be sound better and better as the source tracks and playback equipment get better. The same “.wav” file sounds better on the iPad pro than the iPhone 6 plus. There is a bigger quality jump moving from the iPad pro to the Roon on Dell/Chord Hugo2 and the really good gets much better with the reference rig: Furman 15 dmi/MIT power cords/Melco/Silver Dragon USB with or without Audioquest Jitterbug/Chord Hugo2. I try to keep 2 dynamic and 2 balanced armature iems for comparison purposes in reviews, and to have something to take with me – because the Sennheisers and the Laylas do not leave the house. My current Dynamic Duo are the Periodic Audio BE and the Sennheiser ie 800s. Gone are the Nuforce 700 and 800 series, Klipsch 6 ii, Focal Sphear, and RHA MA-750. The Etymotic ER4s and Grado 10e did not fare well against the Be. Be put them on probation and the Massdrop/NuForce EDC3 iem with an aftermarket Moon Audio Silver Dragon v1 cable sent them away for good. Room for Improvement The Be has a captive cable. Please note that all 3 of my favorite headphones and both of my favorite balanced armature iems had the capability to swap cables and I installed my favorite Moon Audio Dragon (Black Dragon for the Utopias, and Silver Dragon for the NightOwls, Fostex 900’s Astell&Kern/Jerry Harvey Layla 2’s and Massdrop/NuForce EDC3’s.) I wish I could try my favorite cable with the Be, but cable swapping is not allowed. Maybe the next version of the Be will allow that. I have a sneaking suspicion that the Periodic Audio Be with a Moon Audio Silver Dragon would be a better all-around performer than the Sennheiser ie800s, at about half the cost, but we may never know. Final Thoughts If you are thinking of making a roughly $300 “Sound Investment” for in-ear monitors and do not mind waiting a few weeks for them to be trained properly, please put these on your very short audition list. Also on that very short list should be the Massdrop/NuForce EDC3 three Knowles balanced armature iems for $100 (for the drop I was in from Drop.com) with another $200 for a Moon Audio 2-pin iem silver dragon v1 cable for about $200 from moon-audio.com. The combination makes the decision between the EDC3+Silver Dragon and a stock Be very difficult. The two iems do different things. I believe that different people will choose differently, but many will find that a close match, even though they have different strengths and different sound signatures. Short Summary: I think the Periodic Audio Be are one of the greatest bargains in audio at $300. Now I know why Be are the first two letters in Beautiful. Shorter Summary: Berylli-Yum. Delicious sound.

### ⭐⭐ Cables are prone to defects by design it seems
*by H***N on April 8, 2021*

Product came in broken slightly broken with sound coming in only one side of the earbuds.

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