Graham Slee Solo Ultra-Linear Headphone Amplifier with PSU1 [HH00244]

Solo Ultra-Linear Headphone Amplifier

Graham Slee Solo Ultra Linear Headphone Amplifier. With over 35 years of experience and intense research into understanding the true ways to really great audio, Graham Slee brings you the new reference class headphone amplifier. The Solo Ultra Linear headphone amplifier lets the music flow. When the band throws everything into the mix the Solo Ultra Linear headphone amplifier doesn't lose the plot. At last a headphone amp that does away with the sharp glaring edginess so common in today's headphone amps. It replaces it with all the music - all its scale: however you like to describe real music the Solo Ultra Linear headphone amplifier does it that way!

The Ultra-Linear technology is the result of two years almost solid research, exhaustive development and testing. Graham Slee researched how to mimic all the valve's characteristics to improve their products. What they found was that a number of op-amps (integrated circuits) could be made to perform just like valves - discrete transistor circuits being far less predictable. Graham Slee's Solo Ultra-Linear technology feature significantly wider bandwidth (they go to higher frequencies) before negative feedback is applied - just like the best valve amps. What a breakthrough - valve sound at less than high-end prices!

Natural like a valve: solid as a rock!

Valve-Like Sound in Solid-State
A number of integrated circuits perform just like valves - discrete transistor circuits being far less predictable. Ultra-Linear technology feature significantly wider bandwidth before negative feedback is applied - just like the best valve amps.

Musical Performance
Capable of extracting an exciting musical performance from even the most basic CD player. Equally, it will return an extremely musical performance from the highest resolution vinyl system.

Studio Monitoring
High-quality sound reproduction suitable for professional studio and live stage monitoring applications.

Versatile Application
Suitable for open and closed back headphone applications. With closed back headphones volume adjustment will place the soundstage wider and deeper at lower settings, and at higher levels will give near-field monitor listening experience.

Automatic Adjustment
Auto-adjusting output to any headphone impedance from 8 - 2000 Ohms

Technical Specification

• 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) -78dB
• 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

Graham Slee Solo Ultra-Linear Features

• Mimics valve behaviour in a solid-state implementation
• Competent for high quality studio and stage monitoring
• Suitable for open and closed back headphone application
• Auto-adjusting output to any headphone impedance (8 - 2000 Ohms)
• Two line level stereo inputs via gold plated phono sockets
• Can be used on it's own to monitor two different sources
• Front panel source selector switch with "mute" function
• In-line power supply provided in the package (PSU1-24)
• 2-Year Warranty

Package Includes

• Graham Slee Solo Ultra-Linear Headphone Amplifier
• PSU1 unipolar linear audio power supply (24V DC)