Marantz AD-6
¥ 99,800 (around 1982)
Commentary
An electronic crossover network for multi-amplifier systems.
The basic configuration consists of a high-pass filter (HPF) and a low-pass filter (LPF) that divide the stereo signal into a low-pass output and a high-pass output. The HPF and LPF can independently select an 11-point cutoff frequency.
The slope characteristics can be switched between 6dB/oct and 12dB/oct.
Equipped with an ultra-low center channel output dedicated to 3D systems.
The level of each output signal can be adjusted from 0 to - ∞.
It is basically a 2-way + 3D configuration, but the HPF and LPF are connected in series by switching the switch on the front panel, and it also functions as a band pass filter (BPF). By connecting two or three AD-6s, it is possible to develop into a multi-system such as 3-way or 4-way + subwoofer.
The circuit is based on a configuration in which a low-noise wide-band buffer amplifier is placed at the front and rear, and a filter circuit with high-precision resistors and capacitors is placed between them to achieve low-distortion characteristics.
Model Rating
| Type |
Electronic crossover network |
| Cutoff frequency |
| LPF / HPF Independent : |
70 Hz, 90 Hz, 180 Hz, 300 Hz, 500 Hz, 800 Hz
1.2 kHz, 3.2 kHz, 5 kHz, 7 kHz, 10 kHz |
| Center ch : |
50 Hz, off, 90 Hz |
|
| Slope characteristic |
| LPF, HPF Independent : |
6dB/oct., 12dB/oct. |
| LPF at center chON : |
24dB/oct |
|
| Harmonic distortion factor |
0.003% (20 Hz ~ 20 kHz at 1.5 V Output) |
| Frequency characteristic |
10 Hz to 100 kHz + 0 -1dB |
| Signal-to-noise ratio (IHF-A) |
100dB |
| External dimensions |
Width 416x Height 44.5x Depth 300 mm |
| Weight |
4.8kg |
