Diamond D5 Help

[Justintoxicated 10+ year member]

Hi I picked up a 1200.1 off ebay and I have some questions because I don't have the manual and diamond has not posted their older products on their website.

1) Subsonic filter. - How do I adjust this. The knob turns more than one full pass and there are no numbers or ranges listed ont he amp.

2) X-over , same as above!

3) Theres 2 terminals (2 + 2 -) for speaker wire. I am correct in thinking that this is a monoblock amp and that the extra terminals are just there to help run subwoofers in parallel? (i.e, I can hook a 2 ohm sub to one terminal and a 2 ohm sub to another terminal and have a 1 ohm load?)

4) No Bass Boost! But a remote Gain knob? WTF!

Thanks in advance

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