Product: Audio Research DSPre Digital/Analog Preamplifier EXCELLENT Condition With Metal Remote.Very good condition with Metal Remore. Used to feed a pair of Apogee Diva Audiophile Speakers from my digital file server based library. Has 2 USB, Toslink, RCA, Digital Inputs along with 2 Analog XLR inputs. Not quite Class A audio but awfully Close. Contains the legendary Audio Research DAC 8 D/A converter for very Sweet, Transparent sound. From Audio Research:FREQUENCY RESPONSE+0-3dB, 0.2Hz to 200kHz at rated output. 0.15dB 20Hz to20kHz (Balanced, 200k ohms load)DISTORTION (THD)THD+N less than .006% at 2VRMS BAL output.NOISE & HUM-96dB (volume at 1)GAINMax. Analog Gain: 18.1dB Balanced, 12dB SE. Max. DigitalGain: 30dB Balanced, 24dB SE. (Processor input: 0dB balanced)INPUT IMPEDANCE120K ohms Balanced, 60K ohms SE.OUTPUT IMPEDANCE500 ohms Balanced, 250 ohms SE Main (2), 20K ohms minimumload and 2000pF maximum capacitance. Record 1K ohms to selected input.OUTPUT POLARITYNon-invertingMAXIMUM INPUTS24V RMS BAL, 12V RMS SE.RATED OUTPUTS2V RMS 1Hz to 100kHz into 200K ohm balanced load (maximumbalanced output capability is 15V RMS at less than 0.5% THD at 1kHz).POWER SUPPLIESR-core transformer & 7 low-noise regulators. Automatic90 sec. warm-up/brown-out mute. Line regulation better than .01%POWER REQUIREMENTS105-130VAC 60Hz (210-260VAC 50/60Hz) 27 watts maximum.Sleep mode 7 watts maximum.OTHERInputs: Digital: 75 ohms BNC, RCA, 110 ohms AES/EBU, OPT 660nmTOSLink fiber 44.1 to 96kHz. Signal-to-Noise Ratio: 120dB. Dynamic Range(AES17): 117dB. IMD (SMPTE): .007%. Digital Sample Rates: 44.1kHz to 192kHz,SPDIF and USB 2.0HS. Master Oscillator: 22.579mHz ±20Hz for 44.1, 88.2 and176.4kHz. 24.576mHz±20Hz for 48, 96 and 192kHz sample rates. Intrinsic Jitter:<10ps. Controls: Rotary volume selector (104 steps) and rotary inputselector. Push buttons: Power, Mono, Enter, Menu, Sample, Mute, Invert. Remotebuttons: Display, Power, BAL L, BAL R, Filter, Pause/Play/Skipforward-backward, Mute, Mono, Invert, Menu, Enter, Sample, Proc, VOL UP, VOLDN, Bal1, Bal2, Bal3, SE1, SE2, SE3, AES, BNC, RCA, USB, TOS. Crosstalk: -93dB.DIMENSIONS19 (48 cm) W x 5 ¾ (14.6 cm) H (standard rackpanel) x 14 (35.6 cm) D. Handles extend 1½ (3.8 cm) forward of thefront panel.WEIGHT13.2 lbs. (6.0 kg) Net; 19.9 lbs. (9.05 kg) Shipping.