incl. 19% VAT
-   3% prepayment (inside and outside EU)!


The HPA V90 was developped with the target to enable high transmission quality for low- , medium- and high-impedance headphones.

Due to its specific, variable, low-noise and low-distortion circuit design especially optimised for dynamic headphones, the HPA V90 fulfils even higher demands.


because of low internal gain.
Therefore the self generated noise from the amplifer is not audible.

through 60 Volt internal operating voltage.
Therefore best suited for high impedance headphones.
Over 90 % of all headphone amplifiers in the market offer not half that voltage !! 

because of powerful amplifiers able to deliver much more current a headphone needs.
Therefore best suited for low impedance headphones and even magnetostatic cans !!

through lowest output impedance.
Therefore best suited for full control even over critical headphones with the garantee to have flatest possible response.


-  Unbalanced inputs with gold-plated ALPS cinch connectors
Unbalanced outputs with gold-plated ALPS cinch connectors
= switchable input gain in five steps
Independent-channel design
DC-coupled (switchable)
ALPS RK14 volume control 
High-Quality op-amps in the signal path
High-quality MKP capacitors in the signal path
1% metal film resistors throughout the unit
-  2
silver-plated Neutrik headphone outputs
Toroidal transformer
-  Large filtering capacitors in the power supply
-  Switchable ground
Rugged aluminium case with Nextel coating
-  Solid, laser-engraved aluminium front panel


The inputs and outputs are situated on the rear panel, they are equipped with unbalanced Cinch connectors.
Volume control is provided by a large full metal rotary knob.
Two headphones may be connected via 1/4" jacks on the front panel.
The unit offers a built-in power supply with IEC/CEE socket.
Case and back panel are made of aluminium and are Nextel coated.
The 3 mm frontpanel is black anodised.
The labeling is laser engraved.

HPA V90 (discontinued)

  • Technical Data

Technical Data

Unbalanced Inputs: 2, gold plated RCA conncetors
Impedance: 10 kohms
Unbalanced Outputs: 2, gold plated RCA connectors
Amplifier Channels: 2 (Stereo)
Nom. input level: + 6 dBu
Amplifier Gain: +8 dB
... with PRE-GAIN: -4 / +8 / +14 dB
Frequency range: 0 Hz ... 60 kHz (-0,5 dB)
Output Impedance: 0,16 Ohms
Dynamic range: > 126 dB (A-wtd)
Noise: < -102 dBu (A-wtd)
THD+N: < -108 dB @ 10V in 100 Ohms (1W)
< -102 dB @ 4V in 32 Ohms (0,5W)
Crosstalk: < -110 / -100 dB (@ 1 / 15 kHz)
Max. output level: > 20,9 Veff in 600 ohms = 730 mW
  > 15,2 Veff in 100 ohms = 2300 mW
  > 9,4 Veff in 50 ohms = 1780 mW
  > 6,4 Veff in 32 ohms = 1300 mW
  > 3,0 Veff in 16 ohms = 550 mW
Outputs: 2 x 1/4" phone jacks
Power supply: 230 / 115 V AC 7 VA
Dimensions: 170 x 49 x 126 mm (W x H x D)
Case Material: Black anodized aluminium

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