A headphone amplifier with an ideal balance of valvey smoothness with detailed clarity, and full frequency extension with "effortless" dynamics, makes the (solid state) Solo Ultra Linear Diamond Edition headphone amplifier a must-have companion for late night and personal headphone listening at home.
The Diamond Edition Solo Ultra Linear headphone amplifier has a lower noise floor for improved in-ear monitor listening and a new output stage for better performance with difficult and low impedance headphones, yet it has the clout to drive high impedance headphones too.
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.
If you have a Solo SRGII from mid-2004 onwards, you can upgrade to Ultra Linear Diamond Edition performance, with either our factory upgrade, or easy do-it-yourself upgrade. For full ULDE performance, don't forget to use the PSU1 linear power supply.
Superior imaging and great musicality
Powerful without sounding boomy
Valvey smoothness with detailed clarity
Ultra low noise [suitable for In Ear Monitors]
Input switch for two sources
Modestly affordable asking price
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
01 X GRAHAM SLEE - Graham Slee's Solo Ultra Linear Headphone Amplifier
01 X PSU1