Graham Slee Solo Ultra Linear Diamond Edition Headphone Amplifier (Includes PSU1 Power Supply)
The new Solo Ultra-Linear Diamond Edition hi-fi headphone amplifier gives you the sound you always wanted from a headphone amp! A headphone amplifier truly capable of making good headphones deliver a lifelike, dynamic and breathtaking performance with a real out of head three-dimensional stereo sound stage.
The Ultra-Linear voltage amplifier stage gives you the smoothness and warmth of a tube amp, yet with all the precision, fine detail, and punchy sound of the solid state amp it is. Plus, it won't wear out like tubes.
Make the Solo Ultra-Linear Diamond Edition your reference!
Ultra-low noise:the Solo Ultra-Linear Diamond Edition is now also ultra-low noise as well as being ultra-linear.
Higher output current: its output stage has been beefed-up to take control of the most difficult headphones with ease.
No dangerous DC on the headphone output prevents headphone damage: it only takes a small amount of DC offset to heat up the windings of headphone transducers. That heat softens the adhesive which keeps the "voice-coils" in place, and eventually your headphones don't perform all that well. All our headphone amplifiers block DC offset from reaching your headphones.
Tape monitoring: the Solo Ultra-Linear Diamond Edition headphone amplifier has two inputs and a non-shorting mute. Its input switching can be used in tape monitoring as shown here.
(An extra pair of interconnects are required as well as two phono tee-adapters inserted where indicated by the asterisks shown in the diagram)
When connected as per this suggestion, the input selector on the Solo front panel mimics a tape monitor switch. In position 1, the same source as selected on the amplifier is fed to the Solo; in position 2, the output from the tape recorder (or other recording device) is fed to the Solo.
Headphone sensitivity volume control: unlike conventional volume controls, this one is designed to be used over its full rotation to compensate for a wide range of headphone impedances and sensitivities. This avoids the use of gain switches which would otherwise result in differing performance characteristics depending on the gain setting.
Headphone impedance range: 8 to 2,000 Ohms / 16 to 600 Ohms preferred
Power output: (rms, both channels fully driven at 1% THD)
32 Ohms: 140mW/channel; 600 Ohms: 30mW/channel
Input sensitivity (for specified power output into 32 Ohms): 511mV rms
Input impedance: 37k Ohms at max volume; 50k Ohms at min volume
Distortion: (THD plus noise at 9 o'clock volume control setting (qtr power))
10Hz-20kHz: better than 0.04%; 10Hz-1kHz: better than 0.02%
Frequency response (±0,-3dB) 10Hz - 35kHz
Output noise: (22Hz-22kHz, quasi-peak/un-weighted) -95dB
Channel balance: better than 1dB
Crosstalk: Left to Right -56dB; Input to Input -68dB
Input selector centre-off position: non-shorting; -38dB at max volume with 2V rms input (ref: 1kHz and 10kHz)
Output Stage: Bipolar class AB
Supply voltage: 24V DC unipolar
Size: (approx.) W: 107 x H: 50 x D: 185 (mm) inc. controls