Diamond 400.4 speaker/sub wiring....


New member
Username: Birds_05_f350

Post Number: 5
Registered: Jul-05
I just purchased a 400.4 Diamond amp. I hooked up my RF power components to 2 of the channels, and now i have a 10" rockford P3, 2ohm dvc sub brideged to the other 2 channels, my problem is that the amp continues to clip on me, i dont need alot of power because its all in a pickup, But can someone pleaase tell me how to wire the sub because i think i might be doing it wrong. Thanks

Bronze Member
Username: Robert_d


Post Number: 58
Registered: Sep-05
i read before that your amp has to run on 8 ohms if your going to run 2 speakers and a sub but i think i read wrong im not sure by try running everything at 8 ohms

Platinum Member
Username: Glasswolf

Wisteria, Lane USA

Post Number: 10335
Registered: Dec-03
you need the coils of the sub wired in series for a 4 ohm load if the rear two channels are bridged.
otherwise just wire one rear channel to each coil of the sub unbridged for a stereo 2 ohm load.
that'll stop the clipping.
parallel wiring the sub makes it one ohm, then on a bridged amp it'd see half that and clip in a heartbeat.

http://www.rockfordfosgate.com/rftech/wiringwizard.asp?WoofQty=1+woofer&WoofImp= Dual+Voice+Coil+-+2+ohms+x+2&image.x=17&image.y=14

use option #2
this one

New member
Username: Birds_05_f350

Post Number: 6
Registered: Jul-05
alright, ill try that. thanks
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