Amplificador en excelente estado. Recientemente revisado y ajustado. Fantástico sonido.Lleva válvulas rusas Svetlana 6550 CVer fotos. son parte de la descripción. Cualquier duda, preguntar.Envío a todo el mundo.

DESCRIPTION This Audio Research Classic 30 was recently given a clean bill of health and a new set of tubes from George Meyer AV in Los Angeles CA. It has one small blemish just to the lower left corner of the AR name plate on the front.  Item will be shipped with tubes installed (unless requested otherwise) in original box and packaging. ABOUT It's tempting to regard the Classic 30 as merely the smaller sibling of the Classic 60 and 150. But the skeptical music lover or audiophile who auditions the Classic 30 is in for quite a shock. Because this little hybrid stereo amplifier - rated at 30 watts per channel packs a sonic authority and eloquent musical veracity that larger, more conventional power amplifiers might envy. Our engineers have discovered that sometimes less is very definitely more. Of course. the Classic 30 features almost all the same technology as its bigger brothers, scaled down for more modest applications. It has four 6550s instead of eight, two 6FQ7 driver tubes instead of four, and no fans because it runs remarkably cool without any help whatsoever. But this smaller design still retains a similar degree of exceptional musical resolution. Even at low gain settings, the Classic 30 is far more musically lucid than amplifiers objectively far more powerful. The Classic 30 is at its pristine best with moderately efficient loudspeakers in small to medium sized listening rooms: with program materials that demand high resolution and subtlety rather than pure muscle. In that context, it reveals the same sonic mastery as its more powerful siblings. Specifications Power output: 30 watts per channel into 16? (stereo) Frequency response: 15Hz to 20kHz Total harmonic distortion: 1% Damping factor: 23 Input sensitivity: 0.4V Signal to noise ratio: 93dB Speaker load impedance: 4? to 16? Valve complement: 4 x 6550, 2 x 6FQ7/6CG7 Dimensions: 480 x 180 x 370mm Weight: 20.9kg Year: 1988

We traded in from our customer, who was one owner.Local pick-up highly preferred.Audition/test available at our Anaheim shop.This listing may end if we sold thru other online mart like usaudiomart, audiogon or locally.CLASSIC 30 SPECIFICATIONS (AC line set @l20V 60Hz for these specifications)Power Output:30 watts minimum continuous at 16 ohms from l?Hz to 20kHz with less than1.0% total harmonic distortion (typically below .005% at l watt)Power Bandwidth: (-3dB Poi nts) l5Hz to 50kHzInput Sensitivity: .4V RMS for rated outputInput Impedance: lOOK ohms, nominalOutput Regulation: approximately 0.4dB 16 ohm load to open circuit(Damping factor approximately 23)Negative Feedbac k : l9dBSlew Rate: 15 volts/microsecondRise Time: 3.5 microsecondsHum & Noise: Less than 0.5mV RMS - 93dB below rated output (20kHz bandwidth unweighted , inputs shorted )Power Supply Energy Storage: Approximately 150 joulesPower Requirements: l05-l25VAC 60Hz (210-250VAC 50Hz) 300 watts at rated output,400 watts maximum, 200 watts at 11 idle11Dimensions: 1911 (48 cm) W (standard rack panel) x 7 (18 cm) H x 14.511 (37 cm) D(front panel back). Handles extend l 5/811 (4.l cm) forward of the frontpanel. Output connectors extend 111 behind rear panel.Tubes Required: 2 - Matched pair 6550 (low gas) - Power Output2 - 6FQ7/6CG7 - Drivers