Looking at the manual for the MRV0F450 (available here) I was planning on setting it up as per page 16 (top drawing).



Which would power my front components and 2 Subs (2 x WLaurent enclosures in the process of being ordered), but from reading the manual I'm not sure how much power it would be putting out to each in this setup.

What impedance Subs should I be look for, I believe the AMP is only stable when using bridged setup connected to 4 ohms.

Which Subs would suit this setup best, SVC or DVC, given this isn't the highest power setup?

Currently under consideration
JL 8W3
RockfordFosgate HE or HE2
Kicker L5 or L7

I'm limited a bit by what's available here in the UK.

Thanks

Martin

 

You'd be getting 2 x 50 for the fronts and 1 x 120 + 1 x 200 for the sub...

Look for 4 ohm subs

SVC or DVC really doesn't matter. DVC just means you have two options for wiring rather than just one. For example, a DVC with 2 ohms per coil can be wired to 4 ohms (series) or 1 ohm (parallel) whereas with an SVC, what you see is all you get...

But if you don't see yourself purchasing 1 ohm stable amps in the near future, there's really no benefit to getting a DVC sub (however, there is also no detriment...)

 

Is it worth running 2 subs then (if both were going to go in the trunk (boot for UK readers ), if one is only getting 120 and the other 200?

 

You will definitely be louder with two subs with 120 watts and 200 watts than you would with just one sub getting 200 watts (On paper, the difference would be 5 dB. In the real world with cancellation, hot coils, cabin gain, etc. your guess is as good as mine )

Hmmm....I think I'm getting confused as to what exactly you mean by "worth it"

Now, because I can see into the future The second sub might do better as a "helper driver" or 0.5 addition--something I use a lot when I play with full range home speakers both on the top and bottom end.

Basically, you'd LP the 200w sub wherever it is you kids are LPing your subs at these days. Then listen. Then, LP the 120w sub wherever the 200w sub starts to roll off.
That was my next suggestion

Sending more power to your fronts will give you better midbass and allow you to LP your subs at a lower frequency giving you better extension all around.

 

it wouldn't really harm anything to have them running at slightly different powers, but there would be a difference in performance.

have you considered running the components bridged off the amp and the subs in series off the sub channel?

 

I agree - The sub channel on the MRV450 is 2 ohm stable - so you could run the pair of 4 ohm SVC subs in parallel off of the sub channel (@ approx. 100W RMS to each sub) and get good solid power to the components.

 

Thanks I think it all going to come to experimentation.
I was looking at the other diagram which has the fronts bridged and a sub channel. So I think I'll have to play with the various options and see what sounds best for me.

My initial comment about not being stable at 2 ohm cam from Alpine's web site:
[QUOTE]
Are the MRV Series amplifiers 2 ohm stable?
08/21/02-Most of the MRV Series amplifiers are not 2 ohm stable unless it is specifically designed to be used as a mono amplifier.

 

Copied straight from the Alpine website:

The sub channel is 2 ohm stable.

I think a pair of 4 ohm 8W0 JL's would sound nice.

 

yup.

[QUOTE]Originally posted by WLAURENT