Connection confusion, advice needed.

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Nov 24, 2011 | 04:17 PM

427Z0SX

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Le Mans Master

Joined: Nov 2001

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From: Kern County CA

Connection confusion, advice needed.

Amp (Arc Audio xDi 805) is to be "bridged" to drive tweeters, mids, and a sub.
[1] How do I make a "bridged" connection?

There are 2 crossover boxes that came with the Focal speakers. How do I connect these to the amp?

And what terminals (on the crossovers) to connect the speakers to? And which terminals to connect to the amp? There is no labeling (no positive, no negative, no left, no right, nothing at all). Only the 6 screws. And forget the instructions, there are none.

Thanks,

Nov 24, 2011 | 04:38 PM

markcz

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From: North Augusta, SC

At the amp, use front left - and front right + for one door, then rear left - and rear right + for other door. Make sure you use proper sides for where you plug in RCA's.

If you take the plastic off of the crossovers are they labeled

If not you need to call them or find info online

Nov 24, 2011 | 07:31 PM

Thrash

Melting Slicks

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From: Summerton SC

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My Focal XO's are different (new Performance Series from DD), but as for the DXi805 you want to run just Front R & L, with no rears? If so the DXi804 might have been a better choice. Nonetheless the install sheet is attached for both ...

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Last edited by Thrash; Nov 24, 2011 at 07:37 PM.

Nov 24, 2011 | 10:24 PM

427Z0SX

Thread Starter

Le Mans Master

Joined: Nov 2001

Posts: 6,907

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From: Kern County CA

Thanks Thrash and markcz:
I'm trying to do this in between turkey bites

This is the back panel of my head unit:

Looking at the top part of this page:

Only the "Rear" RCA from the head unit is going to the amp. So the "Front" RCA is not used?

Please look at the cable marked with the green arrow. Is that an RCA with a female on 1 end and 2 males on the other?

Nov 24, 2011 | 11:40 PM

markcz

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From: North Augusta, SC

At the HU connect 1 pair of RCA's to the front outputs.

Some amps have a switch that lets you use only one pair of inputs when bridged, looks like you need to split yours to both amp channels if you want to bridge them for more power.

Nov 25, 2011 | 12:10 AM

427Z0SX

Thread Starter

Le Mans Master

Joined: Nov 2001

Posts: 6,907

Likes: 207

From: Kern County CA

Quote:

Originally Posted by markcz

At the HU connect 1 pair of RCA's to the front outputs.

Some amps have a switch that lets you use only one pair of inputs when bridged, looks like you need to split yours to both amp channels if you want to bridge them for more power.

Mark,

I really appreciate your help at this late hour. However, I don't understand why the manual indicates to use the "rear" RCAs from the head unit, but you're telling me to use the "front". Please see the red arrow.
Thanks,

Nov 25, 2011 | 12:17 AM

427Z0SX

Thread Starter

Le Mans Master

Joined: Nov 2001

Posts: 6,907

Likes: 207

From: Kern County CA

Quote:

Originally Posted by Thrash

My Focal XO's are different (new Performance Series from DD), but as for the DXi805 you want to run just Front R & L, with no rears? If so the DXi804 might have been a better choice. Nonetheless the install sheet is attached for both ...

I only have front speakers in the doors (tweeters and woofers), and a sub, no rear speakers. Dennis recommended that I bridge this 5-channel amp to 3 channels to drive: tweeters, woofers, sub.
Thanks,

Nov 25, 2011 | 09:10 PM

markcz

Tech Contributor

Joined: May 2003

Posts: 7,035

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From: North Augusta, SC

It really doesn't matter, but if you're only installing front speakers it makes sense to use the HU front outputs. The amp couldn't care less where the signal comes from.