Blackdog HiFi
Custom Linestage Preamps, Headphone Amps, and Phono Preamps

Custom Design and Build

Blackdog HiFi also designs and builds custom pieces for special applications or needs.

  More than just throwing together a bunch of parts to give you something that either doesn't work, or doesn't perform. All custom work is carefully designed and built to suit your needs and wants. Then thoroughly tested for perfromance.
Some of the custom items are actually standard pieces that have been modified to suit the listeners needs, others are an original one of a kind piece.

Below are some examples of the things we can do for you.

solid state linestage

Single input, high current, low output impedance preamp

This solid state, FET input preamp was designed to drive an amplifier with a very low input impedance (5000 ohms). Output impedance of this preamp is about 1 ohm. 
The owner has only one source. Vinyl.
He is in fact using the orignal protpype of the VTP tube phono preamp.

Gain of 6dB, extremely quiet, and distortion less than .01% at its full 10V output.

Custom Headphone Amp

  Customer with a hearing impairment in one ear required a headphone amp with balance, and able to handle multple sources. The result was the Headphone DE. 
Available only as a custom build. This headphone amplifier produces superb sound quality with solid accurate bass, and clean detailed highs.
  Comprised of our discrete opamp technology. Class A output, and heavy duty power supply. This headphone amplifier can deliver enough current to drive any dynamic headphone on the market.
  It's also one of the few HP amps of quality that has more than one input, and a balance control

Features include
 - Alps volume and balance controls
 - All discrete circuitry
 - Low noise JFET front end for tubelike sound
 - Class A output stage
 - Three inputs (can be modified for 1,2, or 3)
 - 15dB gain
 - Able to deliver over 2V into a 22ohm load
 - Low output impedance to drive any headphone
 - High currenct power supply  - NO WALLWARTS
 - Wide frequency response for superb bass and sparkling highs

Headphone Amp Front Headphone Amp Back

Mikrohead Headphone Amp

Headphone Amp Front

Budget friendly headphone amp.
Built to match our Mikrophono phono preamp for a system look.
Low noise semi-discrete power opamp design
Alps volume control
Able to drive any headphone above 50 ohm impedance
Regulated power supply - No wallwarts

Headphone Amp Back

To request a quote on your special project contact us at the link below or from the contact page

These are some examples of custom made products that will last, sound great, and were exactly what the customer wanted
Some of the other custom built products we have designed are:

Fully balanced rumble filter
EL34 based single ended amplifier
Mute delay timer to prevent tube preamp from popping
Various regulated power supplies