HiLetgo 5pcs EI14/EI-14 Audio Coupling Isolation Transformer Audio Transformer 600:600 1:1

HiLetgo 5pcs EI14/EI-14 Audio Coupling Isolation Transformer Audio Transformer 600:600 1:1

HiLetgo 2pcs XH-M372 Stereo Audio Isolator Vehicle Common Ground Interference Elimination Current Noise Isolation Transformer Coupler with 3.5mm Audio Socket

BOJACK EE-14 8 Ohm Audio Transformer 1300 : 8 Ohm for Voltage Amplification and Power Output (Pack of 10)