Graham Slee Solo SRG II Studio Reference Green Headphone Amplifier

The latest edition of Graham Slee's flagship Solo headphone amp - the SRGII (Studio Reference Green MkII) puts a real life force behind the music.

The Solo SRG II headphone amplifier combines conventional negative feedback with line driver load sensing to exert greater control over your headphones where it is needed.

It reduces or eliminates altogether the comb-filter effect most headphone impedance curves exhibit in the upper midrange and treble frequencies. It also ensures correct matching with the widest range of headphones and overcomes cable capacitance and inductance problems which could otherwise strip the music of its airy qualities and sound staging.

The Solo SRGII headphone amplifier does everything better as well as giving a more weighty bass.

The Solo SRGII headphone amplifier has two line level inputs and a front panel input selector with centre off. It is housed in a strong anodized aluminium eurocard style enclosure. The volume control also acts as sensitivity adjuster and therefore the full rotation can be used. The Solo SRGII headphone amplifier is suitable for use with headphone impedances from 16 Ohms to 600 Ohms.

The "Green" Headphone Amplifier

Graham Slee also made it energy saving! You can buy the Solo SRGII headphone amplifier with an energy efficient power supply complying with world carbon reduction targets for nearly 30% less than the PSU1 powered standard issue.

The Solo SRGII headphone amplifier is also available with PSU1 power supply for those wanting a traditional (but more power hungry) linear power supply.

Details:

• Headphone impedance range: 16 to 600 Ohms preferred; 8 to 2,000 Ohms acceptable
• Headphone Jack: 1/4 inch (6.35mm) A gauge (BPO B gauge to special order)
• Power output (rms, both channels fully driven) 32 Ohms: 27mW/channel; 600 Ohms: 23mW/channel
• Distortion (THD plus noise, ref 1kHz): 0.02%
• Frequency response (-3dB) 32 Ohms load: 27Hz - 35kHz; 600 Ohms load: 10Hz - 39kHz
• Output noise (20Hz-20kHz, CCIR quasi-peak): -84dB
• Input sensitivity (for specified power output) 32 Ohms: 250mV rms; 600 Ohms: 775mV rms
• Channel balance: better than 1dB, "9 to 3 o'clock" positions
• Crosstalk: Left to Right -57dB; Input to Input -68dB
• Mute: Signal off mute, non-shorting
• Output Stage: Bipolar class AB
• Supply voltage: 24V DC
• Size: (approx.) W: 107 x H: 50 x D: 185 (mm) inc. controls

What HiFi Five Stars: "If you are serious about headphones go and have a listen to the Solo - and be prepared to buy it there and then."