An uncompromising version of a class A headphone amplifier.The amplifier is built according to the well-proven Lehmann Audio Black Cube circuit, but unlike the original, the board has protection that will protect the headphones 100% in any emergency, there is a switchable tone compensation, and the weekend transistors are mounted on a common heat sink, which adds linearity to the device. The transistor balanced circuit with a buffer on a high-quality op-amp is a time-tested "classic".
The key to great sound is the selection of extremely high quality components in the signal circuits:
-ОУ - LME49860 or OPA2134 (optional)
- BD140 / BD139 Philips output transistors, vintage in gray case with copper feet
-Driver transistors BC546 / BC556 Philips, vintage with a silver "muzzle"
- Polypropylene film capacitors WIMA, MKP series with shunting by mica capacitors KSO (silver-plated mica)
-Metal film resistors Vishay DALE (US military acceptance)
An adjustable gain (Ku) from 0 to 20dB makes the amplifier universal and allows you to adjust the comfortable volume control for almost any headphone.
Loudness is built on a passive filter that cuts the midrange, while at the same time not adding any "gag", which is observed with loudness on active filters.
Power supply voltage 2x16 ... 20V
Amplifier class A
Built-in protection Yes
Gain 0-20
Maximum supply voltage (bipolar / constant) DC 23V
Minimum supply voltage (bipolar / constant) DC 18V
Number of channels stereo
Output transistors BD139/BD140 Philips
Power at 30 Ohm 0,4W
Supply voltage, maximum (alternating / 2 shoulders on) AC 20V
Supply voltage, minimum (alternating / 2 shoulders on) AC 15V
THD 0.001% at 0.4W at 60 ohms

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Headphone amplifier, A class Premium

  • Brands kitON
  • Product Code: AHW-01
  • Availability: In Stock
  • 3,480.00грн.


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