Hello, I have the following problem and since I have not really found a solution here, I just ask: I have a monoblock: Spectron SP-1500D. 450W RMS @ 4 ohms and a 4 channel level: Spectron A-4150, 4 channel, 800 watts Hanging on the 4 channel 2 Hifonics Zeus 3-way triax speakers 6×9″ ZXi-693 with 150 watts RMS and 2 Hifonics Zeus ZS62CX 16.5 cm, 90 watts RMS. My problem: When I turn my radio (Sony CDX-GT420U ) on a loud bar of 11 or 12 turns the front system and rear system off, the woofer works without mucking on and the 4 channel level also stays on and Protect does not shine either. Backups I have exchanged all already and remote cables as well as chinch cables I have already exchanged … I really don’t know any further, has here some plan Would me mega be happy about your suggestions !!!!! Thank you already