---
product_id: 66986163
title: "SABAJ PHA3 Vacuum Tube Headphone Amplifier 2X6J9 Low Ground Noise Integrated Stereo Amp Audio HIFI Output Protection for Headphone"
brand: "sabaj"
price: "2356582₫"
currency: VND
in_stock: false
reviews_count: 8
url: https://www.desertcart.vn/products/66986163-sabaj-pha3-vacuum-tube-headphone-amplifier-2x6j9-low-ground-noise
store_origin: VN
region: Vietnam
---

# Dual NJM4556 parallel drivers for powerful output Low ground noise with microprocessor relay control 2x 6J9 military-grade tubes for rich sound SABAJ PHA3 Vacuum Tube Headphone Amplifier 2X6J9 Low Ground Noise Integrated Stereo Amp Audio HIFI Output Protection for Headphone

**Brand:** sabaj
**Price:** 2356582₫
**Availability:** ❌ Out of Stock

## Summary

> 🎧 Elevate your sound game with tube-powered clarity and style!

## Quick Answers

- **What is this?** SABAJ PHA3 Vacuum Tube Headphone Amplifier 2X6J9 Low Ground Noise Integrated Stereo Amp Audio HIFI Output Protection for Headphone by sabaj
- **How much does it cost?** 2356582₫ with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.vn](https://www.desertcart.vn/products/66986163-sabaj-pha3-vacuum-tube-headphone-amplifier-2x6j9-low-ground-noise)

## Best For

- sabaj enthusiasts

## Why This Product

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

## Key Features

- • **Sleek & Safe Design:** Aluminum CNC chassis with semi-set tube placement keeps high temps out of reach and looks premium on your desk.
- • **Tube Rolling Freedom:** Easily swap 2x6J9 tubes with E180F, 6ж9П, EF861, or 6688 for personalized sound vibes.
- • **Instant Audio Upgrade:** Transforms your headphone experience with warm, detailed tube sound—perfect for audiophiles and pros alike.
- • **Whisper-Quiet Operation:** Advanced microprocessor-controlled relay mutes noise on power-up for zero buzzing or ringing.
- • **Powerful Headphone Drive:** Dual NJM4556 drivers deliver robust current, ensuring punchy bass and crystal-clear highs.

## Overview

The SABAJ PHA3 is a compact, high-quality vacuum tube headphone amplifier featuring dual military-grade 6J9 tubes and powerful NJM4556 drivers. It offers low ground noise thanks to a microprocessor-controlled relay, a durable aluminum CNC housing, and a semi-set tube design for safety. Compatible with multiple tube types for customizable sound, it delivers rich, punchy audio ideal for discerning listeners seeking a premium HiFi upgrade.

## Description

Free delivery and returns on eligible orders. Buy SABAJ PHA3 Vacuum Tube Headphone Amplifier 2X6J9 Low Ground Noise Integrated Stereo Amp Audio HIFI Output Protection for Headphone at desertcart UK.

Review: Superb little amp, great value ! - Bought this at £29.99 as a as new used item, arrived 2 days later and it looks brand new to me with all the packaging, accessories and box etc so saving myself a tenner is a good start! Build quality is excellent, weighty little amp a bit smaller than expcted but that doesnt matter. iam running this from my Rega Apollo CD player into my Grado SR 80 e (modified with the bass port mode and dynamat mod amd the doughnut ear pads which btw is worth doing!) after using the headphone output on my NAD C300 amp i thought this might improve things and yes its pretty much like chalk and cheese, very clear and musical sounding punchy bass and detailed. I have used Little dots 1, 2 and 3 before as headphone amps as i like the tube sound and this little amp to my ears doesn't lack any of the little dots virtues at at least half the price of the LD 1. All that is with the stock Chinese tubes, i have since bought some E180F mullards to try in this but they are still burning in but i do notice more punch and bass , smoothness and musicality. I know this is all relevant to what you are used to but in my opinion this little amp is worth every penny . definitely value for money , plus you can enter the world of tube rolling if you so wish. At £30 to £40 its a no brainer really, thats if you can buy one as i notice they are not available atm. Oh and when i first plugged it in i noticed the volume was quite low but after 5 mins of warming up it went up by at least 50% and this i reckon is the tubes reaching equilibrium and correct operating temperaure. Good luck!
Review: No brainer bloody brilliant - This device has firstly given me a volume control for my HRT Microstreamer in the form of a lovely round volume button. It's a small thing but before then the Microstreamer was not my daily DAC. Secondly, I love the looks.....those tubes are a talking point. Everyone who has seen it asks 'oooh what's that?'. And finally, the sound, which can be affected by so many variables such as, in my case, DAC/Headphone/Speaker combination, even the quality of cables. And, I immediately upgraded the tubes for a measly GBP 12 the bass is now more pronounced, formed/defined, sound stage yes a bit wider. One note is the noise floor is noticeable but not off-puttingly so. If I listen on headphones connected directly to a DAC bypassing the Sabaj it is dark/silent. I actually bought 2 sets of tubes as an upgrade, In the first set, the noise floor was more intrusive than in the second set. Having installed the 2nd set the noise floor was crazy unacceptable as if something was broken, but I then swapped the positions of the tubes and the problem disappeared. So I am thinking I should have done this with my first set of tubes, doesn't matter, they'll be kept as spares. Although you can hear the noise floor it reminds me of when I used to listen to vinyl records, which were never dark silent. But once the music gets going I don't notice it, especially if you're playing through speakers I find it hard to believe anyone will hear it. Anyway enough rambling, it's great, I love it. I love the sound, I love the looks and it adds functionality for me.

## Features

- Using military grade tube 2*6J9-J for pre amplifier;replaceable design,can be change the tube for E180F, 6ж9П, EF861, and 6688 for different sound style.
- Large current headphone driver parallel NJM4556*2,it gets much bigger driving current.
- Low Ground Noise: There’s no buzzing or ringing when you use our amp! We feature a high-grade microprocessor that controls the relay while its being switched on and off, achieving a low-ground noise power circuit.
- Aluminum CNC housing with stylish design,high quality components and using relay to mute audio.
- Semi-Set Tube Design: As a safety measure, the high temperature portion of the tube is strategically placed inside of the amp and out of reach.(Please plug the power supply after all the connection been done for safety)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07D525SB7 |
| Best Sellers Rank | 501 in Headphone Amplifiers |
| Guaranteed software updates until | unknown |
| Item model number | PHA3 |
| Manufacturer | Shenzhen Dahao Technology Co., LTD. |
| Product Dimensions | 10.1 x 5.1 x 5.9 cm; 640 g |

## Product Details

- **Brand:** SABAJ
- **Item dimensions L x W x H:** 10.1 x 5.1 x 5.9 centimetres
- **Manufacturer:** Shenzhen Dahao Technology Co., LTD.
- **Mounting type:** Freestanding
- **Voltage:** 3 Volts

## Images

![SABAJ PHA3 Vacuum Tube Headphone Amplifier 2X6J9 Low Ground Noise Integrated Stereo Amp Audio HIFI Output Protection for Headphone - Image 1](https://m.media-amazon.com/images/I/61iGGD9MKEL.jpg)
![SABAJ PHA3 Vacuum Tube Headphone Amplifier 2X6J9 Low Ground Noise Integrated Stereo Amp Audio HIFI Output Protection for Headphone - Image 2](https://m.media-amazon.com/images/I/61wsWO--LVL.jpg)
![SABAJ PHA3 Vacuum Tube Headphone Amplifier 2X6J9 Low Ground Noise Integrated Stereo Amp Audio HIFI Output Protection for Headphone - Image 3](https://m.media-amazon.com/images/I/716vdt-3G8L.jpg)
![SABAJ PHA3 Vacuum Tube Headphone Amplifier 2X6J9 Low Ground Noise Integrated Stereo Amp Audio HIFI Output Protection for Headphone - Image 4](https://m.media-amazon.com/images/I/71KFVYypCaL.jpg)
![SABAJ PHA3 Vacuum Tube Headphone Amplifier 2X6J9 Low Ground Noise Integrated Stereo Amp Audio HIFI Output Protection for Headphone - Image 5](https://m.media-amazon.com/images/I/71kXBHe4cPL.jpg)

## Questions & Answers

**Q: Will this amp power my akg k712 pro?**
A: Yes it should do however if your using headphones worth £200 I'd be looking at a higher quality amp than this personally. I'm running Audio Technica MX40's on my Sabaj amp with no issues as a reference for you. This is a very good amp but you may loose range using this with K712's. If your just after a volume boost and a bit of old school valve sound for cheap this amp is excellent for the price.

**Q: What is the input on the front right, the downwards arrow inside a circle?**
A: It is a 3.5mm stereo jack input, although I preferred to use the phono connectors on the back of the unit.

**Q: Is it only for headphone?**
A: Hello, yes this preamp is designed to be used with headphones. If you are after a similar priced preamp for speakers there is a good one by FX Audio for £40.

**Q: Hi! im pretty new to headphone amps and was just wondering if this headphone amp would work with my audio technica lp60? thanks!**
A: Had to look this up and was surprised to find that it's a turntable!  Anyway, according to AT the LP60X (sic) has a switchable phono preamplifier, and if that's the case with yours the headphone amp ought to be just fine.  You need a line level input, and the unboosted signal direct from a phono cartridge will be far too weak - for that reason you should check the turntable manual before buying, but it looks like it'll be good news.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Superb little amp, great value !
*by P***N on 30 May 2020*

Bought this at £29.99 as a as new used item, arrived 2 days later and it looks brand new to me with all the packaging, accessories and box etc so saving myself a tenner is a good start! Build quality is excellent, weighty little amp a bit smaller than expcted but that doesnt matter. iam running this from my Rega Apollo CD player into my Grado SR 80 e (modified with the bass port mode and dynamat mod amd the doughnut ear pads which btw is worth doing!) after using the headphone output on my NAD C300 amp i thought this might improve things and yes its pretty much like chalk and cheese, very clear and musical sounding punchy bass and detailed. I have used Little dots 1, 2 and 3 before as headphone amps as i like the tube sound and this little amp to my ears doesn't lack any of the little dots virtues at at least half the price of the LD 1. All that is with the stock Chinese tubes, i have since bought some E180F mullards to try in this but they are still burning in but i do notice more punch and bass , smoothness and musicality. I know this is all relevant to what you are used to but in my opinion this little amp is worth every penny . definitely value for money , plus you can enter the world of tube rolling if you so wish. At £30 to £40 its a no brainer really, thats if you can buy one as i notice they are not available atm. Oh and when i first plugged it in i noticed the volume was quite low but after 5 mins of warming up it went up by at least 50% and this i reckon is the tubes reaching equilibrium and correct operating temperaure. Good luck!

### ⭐⭐⭐⭐⭐ No brainer bloody brilliant
*by S***K on 3 April 2022*

This device has firstly given me a volume control for my HRT Microstreamer in the form of a lovely round volume button. It's a small thing but before then the Microstreamer was not my daily DAC. Secondly, I love the looks.....those tubes are a talking point. Everyone who has seen it asks 'oooh what's that?'. And finally, the sound, which can be affected by so many variables such as, in my case, DAC/Headphone/Speaker combination, even the quality of cables. And, I immediately upgraded the tubes for a measly GBP 12 the bass is now more pronounced, formed/defined, sound stage yes a bit wider. One note is the noise floor is noticeable but not off-puttingly so. If I listen on headphones connected directly to a DAC bypassing the Sabaj it is dark/silent. I actually bought 2 sets of tubes as an upgrade, In the first set, the noise floor was more intrusive than in the second set. Having installed the 2nd set the noise floor was crazy unacceptable as if something was broken, but I then swapped the positions of the tubes and the problem disappeared. So I am thinking I should have done this with my first set of tubes, doesn't matter, they'll be kept as spares. Although you can hear the noise floor it reminds me of when I used to listen to vinyl records, which were never dark silent. But once the music gets going I don't notice it, especially if you're playing through speakers I find it hard to believe anyone will hear it. Anyway enough rambling, it's great, I love it. I love the sound, I love the looks and it adds functionality for me.

### ⭐⭐⭐⭐ Adds warmth and realism to your music
*by S***D on 7 October 2018*

I agonised for months on whether to buy a dedicated headphone amp costing upwards of £300, else try one of the inexpensive desktop Chinese valve amps. These seemed so cheap that they couldn't be that great, could they? I have a separate DAC/AMP which cost about 10 times the amount of this amp, but although it really digs up the detail and separates the instruments, I found it to be clinical on much of the music I listened to. I decided that for £35-£100 I would take a chance an see whether one of these amps would solve my problem. I have had this amp for a week and now it has started to shine. I chose this amp out of the many on here and for £40 you can't go wrong. It does take around 10 - 20 hours of listening to really shine but has been this missing link for me. I still have the detail of the DAC, but filtered through the glass tubes of this tiny amp, has made listening much more pleasurable. Vocals and instruments sound more 'real' and not so harshly clinical. Used on it's own the amp holds its own, the separation is there, although the detail (in my opinion) can be improved with a good quality DAC. Switching on a blue light flashes, there is a small audible click and the light changes to a steady blue. This I guess is the time that is taken to warm up the tubes ready for operation. There is a headphone output and a source input at the front, both 3.5mm jack. Input is handy at the front, but also a twin rca left and right jack at the back for standard components if needed. I chose this amp as it was the most aesthetically pleasing of the amps on Amazon and eBay, it was also the best design in my opinion. It is solidly built and the tubes are already in situ when you get the amp. You can upgrade them if you like, but I am happy with the sound I am getting from the tubes supplied. I may experiment with other tubes at a later date, but see no reason, as they do the job in my opinion. The power supply isn't the best and this would be the first upgrade for me before I consider any changes to the tubes. Only on only one occasion so far, there was no power to the amp and I think this is down to the power supply unit. Unplugging and plugging back in solved the problem. Overall I recommend this amp and it is an ideal size for my bedside table for late night listening. Just remember like a fine wine, it gets better over time (the term I believe in hi-fi terms is 'burn in').

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*Product available on Desertcart Vietnam*
*Store origin: VN*
*Last updated: 2026-04-26*