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


The HPA V181 was developped with the target to enable ultimate transmission quality for low- , medium- and high-impedance headphones.
These may also be balanced versions !!
HPA V181 was the first balanced headphone amp manufactured in series and coming from Germany !
Due to its specific, variable, low-noise and low-distortion circuit design especially optimised for dynamic headphones, the HPA V181 fulfils even highest 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.

-  Balanced inputs with gold-plated Neutrik XLR connectors
Unbalanced inputs with gold-plated ALPS cinch connectors
switchable unbalanced outputs with cinch connectors 
-  optional USB input 16 Bit / 48 kHz or 24 Bit / 96 kHz 
PRE-GAIN = switchable input gain in five steps
Independent-channel design
DC-coupled (switchable)
ALPS RK27 High-Grade volume control 
High-Quality op-amps in the signal path
High-quality MKP capacitors in the signal path
0.1 and 1% metal film resistors throughout the unit
4 amplifiers with BUF634
1 balanced headphone output, Neutrik 4-pin, gold plated
2 silver-plated Neutrik headphone outputs
Relay-based headphone output cutoff
Toroidal transformer
Large filtering capacitors in the power supply
Switchable ground
Rugged aluminium case with Nextel coating
Solid, laser-engraved aluminium front panel

The four built-in amplifiers provide balanced operation of headphones !!
Connection is made via 4-pin Neutrik XLR connectors.
Two “standard” headphones may be connected via 1/4" jacks on the front panel.
This amp may be equipped with one of six different digital inputs:
Coaxial, optical or USB with either 24/96 kHz or 24/192 kHz

Case and back panel are made of aluminium and are Nextel coated.
The 8 mm frontpanel is black. The labeling is laser engraved.


HPA V181 (discontinued)

  • Technical Data

Technical Data

Balanced Inputs: 2, gold plated XLR connectors
Unbalanced Inputs: 2, gold plated RCA conncetors
Impedance: 10 kohms
Unbalanced Line Outputs: 
2, gold plated RCA connectors
Amplifier Channels: 4 (Stereo Push-Pull)
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: 0,2 Ohms
Dynamic range: > 128 dB (A-wtd)
Noise: < -100 dBu (A-wtd)
THD+N: < -108 dB @ 10V in 100 Ohms (1W)
< -109 dB @ 4V in 32 Ohms (0,5W)
Crosstalk: < -115 / -100 dB (@ 1 / 15 kHz)
Max. output level (bal. mode): > 20,2 Veff in 600 ohms = 680 mW
  > 16,6 Veff in 100 ohms = 2700 mW
  > 10,2 Veff in 50 ohms = 2100 mW
  > 7,9 Veff in 32 ohms = 1950 mW
  > 4,5 Veff in 16 ohms = 1250 mW
unbalanced Outputs: 2 x 1/4" phone jacks
balanced output 1, gold plated 4-pin XLR connector
Power supply: 230 / 115 V AC 10 VA
Dimensions: 170 x 49 x 225 mm (W x H x D)
Case Material: Black anodized aluminium

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