4 channels, 1 sub and 2 6x9s

[rickcd 10+ year member]

Ive got an alpine MRV-F345 amp and im wanting to hook up a pair of alpine

type-R 6X9s and a type-R sub (4ohm)

The amp can run at 4 x 75W RMS. To power the sub im going to need to bridge channels 3 and 4, which alpine say will then total 300W RMS. So the plan is to have channels 1 and 2 powering the 6x9s and 3 and 4 bridged to power the sub.

I have no idea atall how to bridge it though, could anyone help me out with a diagram or something showing me how to do this?

Thanks

Rick

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[qtipextra 5,000+ posts]

Each amp is different. You need to refer to the user guide for that specific amp.

 

[n2audio 5,000+ posts]

it's just a matter of what terminals you hook the sub up to. To bridge the F345 you use the channel 3 (+) and the channel 4 (-), and if you look at the speaker outputs of your amp you'll see that the term "bridged" identifying what terminals to use.

On a related topic. You said your type R is a 4 ohm sub. I don't think Type R's have ever been available as SVC's so you must have a DVC4 which presents a problem with bridging your amp. Your amp needs a 4 ohm load to put out 300w and a dvc4 can only get you 2 or 8 ohms. 2 ohms isn't safe for the amp, 8 ohms will work, but it will cut your power from 300 down to ~150.

 

[rickcd 10+ year member]

ok cheers

regarding the sub, im pretty sure it is DVC (4ohm+4ohm) but cant you just wire the amp into just one set of the terminals?

 

[Prowler573 5,000+ posts]

ok cheers
regarding the sub, im pretty sure it is DVC (4ohm+4ohm) but cant you just wire the amp into just one set of the terminals?

If you're talking about running only a single coil on a dual voice coil sub I wouldn't suggest that...

 

[n2audio 5,000+ posts]

it cuts the power handling of the sub in half, and completely changes its t/s parameters.

 

[rickcd 10+ year member]

so it would be best just to get the 2ohm+2ohm version yeh?

 

[n2audio 5,000+ posts]

definitely

 

[rickcd 10+ year member]

thanks for your help mate

 

[SuperJETT 10+ year member]

http://www.alpine-usa.com

go to Tech Center, click continue without login and under the 2005 amps you'll find the owners manual for free download.

Ive got an alpine MRV-F345 amp and im wanting to hook up a pair of alpine type-R 6X9s and a type-R sub (4ohm)

The amp can run at 4 x 75W RMS. To power the sub im going to need to bridge channels 3 and 4, which alpine say will then total 300W RMS. So the plan is to have channels 1 and 2 powering the 6x9s and 3 and 4 bridged to power the sub.

I have no idea atall how to bridge it though, could anyone help me out with a diagram or something showing me how to do this?

Thanks

Rick

 

[rickcd 10+ year member]

the US site is so much better than the UK one. theres none of that stuf on ours, thanks for that mate

 

[SuperJETT 10+ year member]

Ah, didn't notice you are in England, but yeah it should be the same info, I seriously doubt they make specific models for each country.

 

[amartin_72]

rather than returning the sub just get a mono amp for the sub and run the 4 channel to all of your speakers you will like how it sounds having real power on all your speakers