ROTEL RE-2000
¥ 54,800 (around the late 1970 s?)
Commentary
A stereo octave equalizer that enables fine sound field improvement and range correction.
The equalizer circuit uses a semiconductor resonant circuit (ILAR) that consists of transistors, capacitors, and resistors. This reduces the external influence compared with a circuit using a coil, and prevents S/N deterioration due to electromagnetic induction hum, etc.
The RE-2000 uses an FET in the first stage to eliminate the input coupling capacitor and uses a metallized film capacitor for the output coupling capacitor to improve sound quality.
The power supply circuit is composed of a current limiter circuit and an AMP-type constant voltage circuit to improve the ripple suppression ratio and to lower the source impedance, thereby reducing distortion and crosstalk.
It is divided into 10 bands independently on the left and right, and can be adjusted within ± 12 dB by sliding volume.
Two tape decks can be connected, and 1 → 2/2 → 1 can be dubbed mutually by switching.
The EQ can be used in either playback, recording or dubbing mode. The dubbing switch and monitor switch are independent, so both signals can be monitored alternately by operating the switch during dubbing.
Equipped with an equalizer selector switch.
In the Normal position, the equalizer is applied only for playback. In the Bypass position, the input / output terminals are connected directly and the equalizer circuit jumps. In the EQ REC position, the equalizer is applied for both dubbing and Source → recording.
* Direct connection to a power amplifier without volume is not recommended.
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Model Rating
| Type | Octave equalizer |
| Channel | 2 channels (Left, Right) |
| Band | 10 Band / ch |
| Band control characteristic | ± 12 dB |
| Center frequency | 32, 63, 125, 250, 500, 1k, 2k, 4k, 8k, 16 kHz |
| Input Sensitivity / Impedance | 0.775V/56k Ω |
| Rated Output / Impedance | 0.775V/600 Ω |
| S/N ratio (IHF-A network) | 100dB |
| Residual noise | 0.08mV |
| Frequency characteristic | 10 Hz to 100 kHz + 0 -1dB |
| Harmonic distortion factor | 0.005% |
| External dimensions | Width 482x Height 143x Depth 328 mm |
| Weight | 6.3kg |