Kenwood KR-2300 (1973–1976)
A solid-state AM/FM stereo receiver made in Japan, with microphone mixing and two sets of speaker terminals.
Overview
The Kenwood KR-2300 is a solid-state AM/FM stereo receiver made by TRIO-KENWOOD in Japan. It was produced from 1973 to 1976 as an entry-level unit. It shares a unified design with the KR 4200. It has a microphone mixing circuit, so a voice can be blended with audio from phono, AUX, AM, or FM. Pull up the mixing volume knob and the output switches to microphone-only mode, with level set solely by the microphone volume. It also has two types of speaker terminals.
Specifications
| Original price | ¥ 39,900 (around 1973) |
| Model Rating Type | Solid State AM/FM Stereo Receiver |
| Music Power (IHF) | 64W (4 Ω), 44W (8 Ω) |
| Effective power 1 kHz, one channel operation | 22W/22W (4 Ω), 17W/17W (8 Ω) |
| Effective power 1 kHz, both channel operation | 15W + 15W (4 Ω), 14W + 14W (8 Ω) |
| Total harmonic distortion factor (8 Ω) | 1.0% or less at rated output, 0.2% or less at -3dB |
| Intermodulation distortion factor (8 Ω) | 1.0% or less at rated output, 0.2% or less at -3dB |
| Frequency characteristic | 25 Hz to 50 kHz ± 2 dB |
| Output Bandwidth (IHF) | 30 Hz to 50 kHz |
| Damping factor | 30 (8 Ω) |
| Input Sensitivity / Impedance Phono | 3mV/50k Ω |
| Input Sensitivity / Impedance AUX | 120mV/30k Ω |
| Input Sensitivity / Impedance MIC | 4.5mV/20k Ω |
| Input Sensitivity / Impedance Tape Play | 120mV/30k Ω |
| Input Sensitivity / Impedance Recording and re-outputting PIN/DIN | 180mV/30k Ω |
| Signal-to-noise ratio Phono | 65dB |
| Signal-to-noise ratio AUX | 70dB |
| Signal-to-noise ratio MIC | 60dB |
| Signal-to-noise ratio Tape Play | 70dB |
| Tone control 100 Hz | + / - 8 dB |
| Tone control 10 kHz | ± 8 dB |
| Loudness control | 100Hz:+8dB |
| FM Tuner Section Receiving frequency | 76 MHz to 90 MHz (Japanese FM band) |
| FM Tuner Section Antenna impedance | 300 Ω Balanced Type / 75 Ω Unbalanced Type |
| FM Tuner Section Sensitivity | 2.5 μV |
| FM Tuner Section Distortion Factor (400 Hz, 100% modulation) | Stereo: not more than 1.0%, Mono: 0.8% or less |
| FM Tuner Section SN ratio (100% modulation, 100 μV input) | 60 dB or more |
| FM Tuner Section Capture ratio | 4.0dB (IHF) |
| FM Tuner Section Selectivity | 40 dB or more (IHF) |
| FM Tuner Section Image ratio | 50 dB or more |
| FM Tuner Section IF interference ratio | 95 dB or more |
| FM Tuner Section AM suppression ratio | 45 dB or more |
| FM Tuner Section Harmonic spurious ratio | 80 dB or more |
| FM Tuner Section Separation (1 kHz) | 30 dB or more |
| FM Tuner Section Subcarrier suppression ratio | 40 dB or more |
| AM Tuner Section Receiving frequency | 520 kHz to 1610 kHz |
| AM Tuner Section Sensitivity | 25 μV |
| AM Tuner Section Selectivity | 25 dB or more |
| AM Tuner Section Image ratio | 45dB |
| AM Tuner Section IF interference ratio | 35 dB or more |
| Power | 100 VAC / 117 V, 50Hz/60Hz |
| Rated power consumption | 65W |
| External dimensions | Width 450 x Height 144 x Depth 335 mm |
| Weight | 9.4kg |
Design
The KR-2300 shares a unified design with the KR 4200. The microphone mixing circuit combines microphone input with phono, AUX, AM, or FM sources. Pulling up the mixing volume knob switches the output to microphone-only mode, where the microphone volume alone sets the level. The unit has two types of speaker terminals for connecting speakers.
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