Manufacturer maintained by Marantz Metropolitan Area Service! Marantz channel divider AD-6. Since the cutoff frequency is variable LOW/HIGH, various combinations are possible. For 2WAY+3D systems with a center channel. It can also be used as a 2-way channel divider without using a superwoofer. Although the sound itself isn't as thick as a business process, it's sharp and I like it. You can see the exterior, dullness, and feeling of use (Kobayashi Hitoshi)
Maintenance information: 2025.12.18 Manufacturer maintained (flat cable solder repair connecting the input/output terminal board and filter circuit board. Check the through holes on the printed circuit board and the continuity of each track on the printed circuit board. Filter board and power board solder inspection and correction. Each VR and SW contact point cleaning. Check the cutoff, rolloff frequency, and distortion of the LOW PASS, HIGH PASS, and center channel filters. (Running test)
Accessories: instruction manual (copy)
Main specifications: electronic crossover network cutoff frequency LOW/HIGH independence: 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 channel: 50 Hz, OFF, 90 Hz frequency characteristics 10 Hz to 100 kHz size W416 x H44.5 x D300 mm weight 4.8 kg