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[FezV6]

for any of you ice experts out there:

I have a system in my car which im wondering if I can improve at all. I am running an Alpine MRP-F356 which is currently powering 2 10" subs @2ohm from the sub channel and four speakers, one from each remaining channel. I have infinity components in the front and infinity 6x9's in the back.

What I was wondering was if its possible to wire the sets of speakers together and bridge them so its running 2ohm bridged, and also if there is anything to be gained from this? The manual only gives figures for 4ohm bridged, 4ohm per channel and 2ohm per channel. Is this because it will overload the amp bridged @ 2ohm?

Alternatively I was thinking of wiring the 6x9's direct from the headunit (kenwood 50wx4 MD player) and just running the components bridged @ 4ohm. I was a bit concerened that this may cause the 6x9's to distort well before the components struggle.

Any opinions much appreciated

[Robz_Fester]

I've wondered this before. I can't see there would be a problem. It may be a bit hairy with the sub channel running @ 2ohms as well, but why not try it. I'd say it will probably fry a fuse before the amp anyhow. Maybe downgrade the fuse to be on the safe side?

[Oranoco]

Run the 6x9's off the headunit or better still get shot of them altogether and then run the front speakers off the amp along with the sub

[Robz_Fester]

I used to run a celestion 12" amp with Inifinty comps, but I think 2 10s may over power them...
and if you bridge the comps it will be in mono which isn't a good look!

[Robz_Fester]

either way though don't run the 6x9s off the H/U!

[Oranoco]

either way though don't run the 6x9s off the H/U!

Why do you say that? They are only there to provide a bit of rear fill which the headuniot can do quite adequetly

[Robz_Fester]

The setup should be set up so that the gains on the amp are such that when the headunit is on full volume it is *just* before the system starts to distort. If you have the gains up any higher than this it will be a) a waste and b) you won't get as much control over the system.
Working to this principle, if you have the system at full volume the 6x9s will prob start distorting at around 3/4 volume, therefore it will lower the quality of the sound...

[Oranoco]

I wouldn't go along with that mate. The headunit should never be run to full volume.

On all the installs I've done I run the head unit to about 3/4 volume and set the gains from here usually to about half as a start point and dial things in from there. Nothing is ever run flat out as that's when you suffer distortion or worse still a crap sounding setup. I would opt to run the 6x9's off the headunit and set the system up properly to avoid any distortion of the sound quality. The back speakers are only there to provide a bit of real fill so they don't require driving hard. Load rear speakers sound naff and you just end up with a noisy install not a nice sounding one.

[FezV6]

Thanks for the replies people.

I wasnt going to run the comps in mono, the thought was to run the right hand component and the right hand 6x9 together on one bridged channel and the two left speakers together on another bridged channel.

I knew there was going to be the comment of ditch the 6x9's, I have thought about it.

Anyway, ill try to get the car back on the road before I start messing with this again

[Robz_Fester]

I think you can only bridge the left and right channels on a given output can't you?

[FezV6]

The amp has four inputs - i.e left front and back and right front and back . as far as the lables on the amp say, yes it would be bridgeing left and right together. I would just swap the input cables round so it was actually bridgeing the stereos front and back outputs

[Robz_Fester]

ahhh, a cunning plan