Orion 8004 problems, only playing 2/4 subs

[JeffyZ33 10+ year member]

Well here's the deal... I sold my friend my Orion 8004 (nib) and my 4 RE 8s to my friend. I wired the 8''s to each pair is at 4 ohms (actual 3.2-3.5ish) to bridge the amp into 2 channels (400x2@4).

Here's the problem.. one of the channels doesn't seem to be working. We've changed RCAs around (only 1 set of RCAs), and the only way to make the opposite subs work is to change the wires from one channel to the other. The slight problem is that we've only got 1 pair of subs to work at a time. There are a few things I'm questioning.

In the manual it says to bridge to 2 channels you use the FRONT inputs and it sends the signal to the back of the amp. There is a 2ch/4ch switch and we've tried switching it to either and we've tried all the sets of inputs. It only works if 1 (or 2) of the RCAs are in the front inputs. We've tried about everything bridging the amp. Tomorrow we're going to try to run wire from each sub and see if it works that way (200x4@2ohm).

Any idea how to fix this? My other friends 8004 did the same thing, he put it on 4CH and used the BOTTOM inputs (i believe front left and rear left, i dont remember) and it works.

Also, where should the selecter be.. MASTER/GAIN/COPY. Master and copy are for linking amps, but I'm not sure what the diff in MASTER/GAIN is.

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[JeffyZ33 10+ year member]

Anyone?

 

[iceteebone 5,000+ posts]

there should be something that changes the rca inputs to paralell or 2-channel. i ran my 4004 in 2-channel mode with one set of rca's with no problem.

 

[JeffyZ33 10+ year member]

We've tried switching from 2ch-4ch-2ch and nothing works but 2 at a time. We've checked and double checked the impendance of the speakers (~3.5 per pair) and every coil on them checks out to be fine.

Today we're going to run wire from every sub (not bridged) and try using rca splitters and run in 4ch mode. If this dont work I dont know what will.