This is my high quality CMoy headphone amp with added Adjustable Bass Boost (ABB) function

High quality audio usually mean reproducing audio source signal as close as possible to original. Lowest possible distortion, flat frequency response, no EQ.

So why the bass boost?

When we  listening to live music or good speakers, we listening with our ears, of course. However part of low frequency bass energy we “listening” with our body.

When we listening through headphones, we missing that “body listening” information, which is felt as a lack of bass.

To compensate this effect, we need slightly bass boost on lowest frequency, without impact on mid band.

Instead of simple bass boost switch with one setting, I designed Adjustable Bass Boost (ABB) , so you can adjust amount of bass boost, depending on your headphones, music you listen to and personal preferences.

This amp can easily drive almost any headphones with 16ohm to 600ohm impedance and greatly improve the sound quality and boost the weak output of your DAP, phone, DAC, soundcard or any other music source.

Amp is designed and hand built, tested by me, Zigis, in Latvia, Europe

Will be shipped worldwide

Amp is built in Hammond enclosure, front panel options are Gold, Silver and Black

I designed Printed Circuit Board (PCB) for this amp, employing principles used in HI-END audio, such as the shortest possible signal path and power supply caps as close as possible to the op-amp power leads. All parts, including volume pot and jacks, are on PCB and there is only one cable to the battery.

All audiophile-grade parts are carefully selected for the best possible sound quality through long experiments and listening sessions.

Wima MKP2 polypropylene caps (for bass boost part)

Texas Instruments LM4562 or OPA2134 opamp on gold-plated 8-pin DIP socket

Japan made ALPS RK097 volume control with power switch

Metal film 1%+ hand matched resistors

Panasonic FM low ESR 470 mf power caps

TLE2426 Rail splitter

Amplifier can be powered by internal 9v battery or any external DC Power Supply with voltage between 12V - 30V

DC input socket is 5,5/2,1mm with center tap positive (+)

9V battery and PS are not included