Radii ALP-01R

Output Impedance: <1K
Frequency Response: 10Hz to 100,000Hz
Harmonic Distortion: <0.1%
Tube Complement: 12AU7x3 (Electro Harmonix), 5AR4x1 (China)
S/N Ratio: 85dB
Power Consumption: 30W
Dimensions (W x D x H): 275 x 280 x 185mm
Weight: 7Kg
Features: IR Remote Control Volume UP, DOWN and MUTE
Demo unit, ~200 hrs of operation, excellent condition.
Included: preamplifier, tubes, remote control, manual and original packaging.
90 days warranty, electronics and tubes.
Price: $490.00 (retail $940.00)
Shipping: FREE in the continental US, $20 to CanadaThe preamp's response is fast and accurate. High bandwidth and excellent stability (check out the output square wave oscillograms that I took quick shots of). Very responsive to tube changes - great results with NOS Mullards (great bass, accurate middle, silky smooth highs). Worked equally well with all amps it was hooked up to: Burson and NAD SS amplifiers, Vista-Audio, Audio Space and Cary tube amplifiers.
Remote control is machined aluminum, heavy and robust.
1kHz square

10kHz square

100kHz square!!!

Thanks for looking!
Boris