Marantz Model 2285b Receiver

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Front View Image Attribution: My own unit, from it's Ebay auction. Now sold. Rear View EBay Auction #1208014344 Date: January 14th, 2001

General Rarity Scarce Retail Price 670 Ebay Low-bid $150.00 Designed in USA Manufactured In Japan First Year 1977 Last Year 1980 Wood Case WC-122 Silver Face Yes Channels Two Speaker Connections Main, Remote Chassis Ground Knurled screw AC Switch Yes Fusing Rear deck, buss, 5 ampere Switched AC Outlets One @ 100 watts Unswitched AC Outlets One @ 200 watts Power Source Details Dual Secondary power supply Power Consumption 340 watts, 50 watts @ idle Independent Power Supplies Dual Secondary only Special Option 1 DLB1 Dolby FM Decoder (US Models only)

Valuation, Purchases, Parts and Manuals

Physical Panel Width 5 3/8 Panel Height 17 5/16 Width 17 1/4 Height 5 1/2 Depth 14 1/4 Weight 37.4 lbs, 42.9 packed for shipment

Amplifier RMS Power Per Channel 85x2 Damping Factor @ Load Impedance 60 (at 20 Hz) Total Harmonic Distortion (THD) 0.05% Power Bandwidth 20 hz to 20 khz Frequency Response +/- 0.2 dB 20 Hz to 20 KHz @ 1 watt Intermodulation Distortion (IM) 0.05% @ 8 ohms, 0.10% @ 4 ohms Input Impedance 33 Kohm Input Sensitivity for Full Output 1.5 Volts Output Impedance(s) 8 ohms to 4 ohms

FM Tuner Gyro Tuning Yes RF Sensitivity 1.8 uV 300 Ohm Binding Posts Yes 75 Ohm Binding Posts Yes 75 Ohm F Connector Yes 50 dB quieting sensitivity, Stereo 35 uV 50 dB quieting sensitivity, Mono 3.0 uV Ultimate Quieting 78 dB @ 1000 uV THD, Mono 0.30% THD, Stereo 0.50% Frequency Response 30 Hz to 15 KHz +/- 1.5 dB in Stereo Hum and Noise 75 dB Capture Ratio 1.0 dB at 65 dBf IF Image Rejection 90 dB IF Rejection 100 dB Stereo Subcarrier Rejection 70 dB Alternate Channel Selectivity (wide or normal) 080 dB Spurious Rejection 100 dB AM Carrier Rejection 55 dB Stereo Separation at 1 kHz 50 dB Mono Switch Yes Signal Strength Meter Yes Center Tuning Meter Yes Multiplex Filter (Hi-Blend) Yes Stereo Lamp Yes FM Mode Lamp Yes Multipath Listen Yes Muting Switch Yes Muting Adjustment Rear Deck 25 uS Deemphasis Switch (Dolby Associated) Yes Dolby Fm Decoding Option Yes Illuminated Dial Pointer Yes

AM Tuner Alternate Channel Selectivity 46 dB IF Rejection 75 dB Image Rejection 75 dB THD 0.4% Signal to Noise Ratio 54 dB Spurious Response Rejection 85 dB Signal Strength Metering Yes

Preamplifier Multiple Bass Adjustments Yes Multiple Midrange Adjustments Yes Multiple Treble Adjustments Yes Tone Control Defeat Yes Bass Turnover Options Yes Treble Turnover Options Yes High Filter Yes Low Filter Yes Gain Control Yes Loudness Contour Yes Mono L, R, L+R (discrete buttons) Balance Knob Number of Tape Monitors Two Tape to Tape Dubbing Via front panel or rear, 1 to 2 or 2 to 1 Auxillary Input Source Yes Phono Input Source Yes 2nd Phono Input Source Yes Illuminated Source Indicators Yes Tuner Source Input Am/FM Tape Monitor Yes 2nd Tape monitor Yes Preamp to Amplifier Jumper(s) Yes Headphone Jack(s) Yes Speaker Selection Nomenclature 1, 2