Graham Slee Solo Ultra Linear DE - Headphone Amplifier

• And It's A Solid-State Headphone Amplifier!
• The Solo Ultra-Linear Diamond Edition (ULDE) headphone amplifier replicates tube amplification, but is solid-state to keep it's performance for all its long life.
• So what about tubes does it replicate? It replicates the most important difference between tubes and solid-state, that tubes give a flatter open-loop frequency response which extends into the mid frequencies, before negative feedback is applied. It means that when it's applied to keep distortion low, it is true 180° negative feedback, and it gives a wholesome sound which otherwise is sadly lacking in solid-state.
• We use our proprietary and well-guarded bandwidth extension technique we call Ultra-Linear which replicates this most desirable of tube characteristics.
• The Solo ULDE has a completely redesigned output stage and better noise performance than the earlier Solo UL, which means it will drive a much greater range of high performance over-ear dynamic headphones, and be hiss-free when used with in-ear monitors.
• Unlike tube amplifiers it works with all common headphone impedances, and its Z-Match impedance ranging volume control takes the place of gain switches, allowing amplifier gain to be fixed so it results in optimum musical performance.
• Generous phase and gain margins give it great high-frequency stability under all loading conditions. This coupled with its wide input latitude lets it effortlessly reproduce large musical transients with real clarity.
• Excellent power supply filtering and ultra-stable voltage regulation make its power so clean that it depicts the minutest of detail, the nuances - the shades of expression, so your music really communicates with you.
• It also results in superb stereo imaging with great separation between performers and instruments, dispensing a believable stereo sound stage.
• The Solo ULDE reveals the emotional content of your music and will immerse you in your music without fatigue for hours on end.
• Chosen by Grado for public audition, the Solo Ultra-Linear DE has demonstrated its commanding control over many of the world's best dynamic headphones, bringing them to a performance few other headphone amplifiers are capable of at any 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
  
  

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