music hall ha23.3 hybrid headphone amplifier front

ha25.3 headphone amplifier

We designed the music hall ha25.3 to impress headphone listeners with unparalleled musical prowess.


The ha25.3 is a fully balanced tube & solid-state (hybrid) headphone amp that uniquely doubles as a two-input stand-alone tube pre-amp.

tube + solid state

Basic looking on the outside yet sophisticated on the in. Under the hood, we’ve married a tube pre-amp section with solid-state amplification. This provides you the rich robust sound of tubes with the speed and punch of solid-state.

Put simply, the music moves you.

feature list

  • fully balanced headphone amplifier
  • 2 x line-level inputs
  • hybrid design (tube pre-amp & solid-state amp)
  • 2 x Philips JAN tubes, type 6112
  • 3 x headphone outputs; 3.5 mm, ¼ in., and balanced XLR
  • 2 x analog outputs; 1 pair RCA fixed, 1 pair RCA variable
  • differential tube input amplification stage
  • discrete output buffer
  • high output power for the best sound experience
  • worldwide compatibility

technical specifications

min. headphone impedance 8 ohms
output power 268mW/300ohms, 770mW/33ohms, 500mW/8ohms 340mW/8ohm – balanced
SNR -101dB (100mW/33ohm)
THD + N <0.06% @ 100mW/33ohm
gain 4dB (33ohm)
crosstalk better than -98dB, 100mV, 10kHz
frequency response 20Hz-80kHz (+/- 0.2dB)
input impedance 15kOhm
outboard power supply 18V/1000mA DC
power consumption 450mA DC, 0.0W in standby
dimensions 6.7w x 6.5d 2.24h in. (170w x 165d x 57h mm)
weight without power supply 1.72 lbs. (780 g)

  for support, please call (516) 487-3663 or email us at

for support, please call
(516) 487-3663
or email us at