COLUMBIA CHD-300
¥ 54,800 (around 1971?)
Commentary
A channel divider capable of dividing the band.
To match any speaker, the crossover frequency is divided into a wide range of frequencies from 200 Hz to 8 kHz using a √ 2 geometric progression, and the slope of the crossover cutoff can be changed to 6dB/oct, 12dB/oct or 18dB/oct.
The cutoff frequency can be varied independently for each band.
With a defeat switch, it can be divided into two parts, middle and high range and low range.
In addition, by using two CHD-CHD-CHD-CHD-CHD-CHD-CHD-CHD-CHD-CHD-CHD-CH 300
It is equipped with a channel phase inversion function for high and low frequencies.
Model Rating
| Type | Channel divider |
| Cut-off frequency (Each channel independently variable) |
Low frequency channel LPF : 200, 280, 400, 560, 800 Hz Mid-range channel L. cut : 200, 280, 400, 560, 800 Hz H. cut : 2.0, 2.8, 4.0, 5.6, 8.0 kHz * L. cut, H. cut each defeat possible High-frequency channel HPF : 2.0, 2.8, 4.0, 5.6, 8.0kHz1 |
| Cutoff characteristic | 6dB/oct., 12dB/oct., 18dB/oct. |
| Phase switching | Phase inversion possible for high and low channels Gain difference at switching : 10 Hz to 30 kHz 0.5 dB or less |
| Gain | -2dB |
| Maximum allowable input | 6V(THD0.1%) |
| Rated output | 1 V (THD0.03% or less) |
| Output impedance | 3k Ω Minimum load impedance : 10k Ω |
| Input impedance | 500k Ω or More (1 kHz) |
| Semiconductor used | Transistor : 27 FET : 18 |
| Pwer | 100 VAC, 50Hz/60Hz |
| Power consumption | 7W |
| External dimensions | Width 370x Height 141x Depth 305 mm |
| Weight | 5.5kg |