Marantz Model 7tr Preamp
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Front View
Image Attribution: Freddy Sangild
Date: July 5th, 2000
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| General |
| Description | Preamplifier |
| Rarity | XXX-Rare |
| Designed in | USA |
| Manufactured In | USA |
| First Year | 1967 |
| Years Manufactured | 1967-1970 |
| Last Year | 1970 |
| Blue Face | Yes |
| Tube Design | No |
| Chassis Ground | Binding Post |
| AC Switch | Yes |
| Switched AC Outlets | 5 |
| Unswitched AC Outlets | 1 |
| Power Consumption | 9 watts |
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| Preamplifier |
| THD | < .05% @ 1v RMS |
| IMD | < .05% @ 3v RMS |
| Single Bass Adjustment | Yes |
| Single Treble Adjustment | Yes |
| High Filter | 9 kHz, 5kHz |
| Low Filter | 50 Hz, 100 Hz |
| Mono | L,R,L+R |
| Channel Reverse | Yes |
| Number of Tape Monitors | Two, 1 FP |
| Auxillary Input Source | Yes |
| 2nd Auxillary Input Source | Yes |
| Phono Input Source | Yes |
| 2nd Phono Input Source | Yes |
| Cartridge Type Selection | old 78, RIAA, old Col LP |
| Tuner Source Input | Yes |
| Source Television Input | Yes |
| Source Microphone Input | Yes |
| Source Tape Input (as opposed to a tape monitor) | Yes (tape head) |
| 2nd Source Tape input (as opposed to a tape monitor) | yes (front panel) |
| Tape Monitor | Yes |
| Scope Output(s) | Yes |
| Center Channel Output | Yes |
| Center Channel Gain Control | Yes |
| Tape Equalization | Yes, L/R separate |
| Headphone Jack(s) | Yes (600 ohms or more, obsolete) |
| Hum and Noise | 100 dB below input level |
| Signal to Noise Ratio | 100 dB |
| Frequency Response | 20 Hz to 20 KHz +/- 0.5 dB |
| Rated Output Level | 1v RMS |
| Maxiimum Output Level | 3v RMS |
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