Sub/Amp compatibility - need some advice please

[G_man_GT]

Hey people.

Started to upgrade my audio gear cos im sick of the poo saxo speakers. So far i've dynamtted my front doors and its made quite a difference to the sound already. I've got some 13cm Boston's to go in the front that should be arriving soon and I've turned off my rear speakers as i wont be using them. I dont plan on getting 6x9's either, lol.

Im looking to install a sub in the boot, i know a fair bit about the mechanics of cars but i'll hold my hands up and say i know hardly anything about subs an amps whatsoever so im looking for some advice really.

Im thinking of possibly an 8 or 10" sub , nothing bigger really, but unsure of which one, which is better?

I listen to all sorts of mucis, indie, hip - hop, rock, dance, garage so dunno if that would help when choosing the size. Budget wise im looking to spend about 300 quid on the sub and amp in total.

I've heard some of the jl audio gear in my local car audio shop (and heard about it, im lookign for audio quality btw not loudness) and its looking pretty good so i've been looking at this sub:

http://caraudiosecurity.com/shop/pro...s_id/4134.html

and this amp:

http://caraudiosecurity.com/shop/pro...s_id/4552.html

but was unsure of the compatiblitity between the two and all this business about 2, 4 and 8 ohms? the 8" jl comes in 4 and 2 ohm, does it matter which you buy? Is there a better amp than that?

Any help and advice would be greatly appreciated, thanks in advance Dave Ward and all you other ice techies that will hopefully read this lol

Thanks

Grant

[DaveWard]

Right mate with you music taste I would advise a 12" sub really.

If your planning on getting a 2 channel amp to bridge to one channel for a sub you will need a single 4ohm voice coil sub or twin 2 or 8ohm (to wire to show 4ohms)as bridged amps can only power 4ohms.

[BBL]

i would adivse a 10" slightly more suited for all round performance for such things as lots of music tastes. just read a review and the blaupunkt velocity VW250 sub come out as the best all rounder. altough £140 i would personally recommend it from hearing it myself.

Hope this helps

Rep Plz

[G_man_GT]

ok cool thanks, 122or possibly 10" but no 8's, got it.

Can you recommend any particularly good amps about atm for under 200 quid that would be suited to powering a JL 10w3 or 12w3 (both have an rms of 300 watts btw)? or anyones to particularly avoid? lol

thanks

[BBL]

rms seems average, i would still get the blaupunkt, that has handling power of minimum of 450rms!!!

as for the amp the alpine v12s are decent although havent looked at the price prob around 200 if you hunt about. then again try ebay mite not be what you want to do but you can pick anything up on there in new or near new condition, that wouldnt matter if the amp wasnt on display as long as it worked could save youself some money.

Hope i helped

Rep Plz

[KAMENi]

Originally Posted by DaveWard

Right mate with you music taste I would advise a 12" sub really.

If your planning on getting a 2 channel amp to bridge to one channel for a sub you will need a single 4ohm voice coil sub or twin 2 or 8ohm (to wire to show 4ohms)as bridged amps can only power 4ohms.

why do you say that? i dont think it's true.

here's a good 12" sub
and you can use that amp you choosed.
it would be adviseable to amp the fronts aswell

[G_man_GT]

ah ok. another question, lol - what the difference between getting a mono amp and getting a 2 channel and bridging it? is it more powerful this way? or just cheaper?

[KAMENi]

you can find a D-klass mono which is used for powering subwoofers, and with a 2 channel amp you can power whatever you want

[DaveWard]

Monoblock amps are designed with powering a sub in mind so they are designed to power low impedances (ohms). The lower the ohm the harder the amp is working and the more power its producing.

KAMENi:98% of two and four channel amps are fine to run at 2ohms per channel but not at 2ohms if bridged.

[KAMENi]

they can also run at 2 ohm, but they produce more heat. i never heard of anyone who had problems (besides heat) with running a 4ch amp bridged on lower than 4ohms

i'm running mine on 3 ohm bridged, and i know people who run their 4ch on 2 ohm bridged.

[G_man_GT]

so a mono amp would be better for the job then as it would create less heat and be more efficient (providing its a class d right)?

[KAMENi]

basically, yes. the only thing with D-class amps are that they lack sound quality. it's made for bass

[G_man_GT]

ah thats not too good then, im after sound quality here really tbh, thats why im lookign at the jl stuff, im not really after the loudest bass ever, id ratehr it sounds proper. so any mono really will do then? it doesnt have to be class d?

[KAMENi]

yes, try to find decent 4 channel amp and you'll solve all your problems

[G_man_GT]

ok thanks for your help, i shall go off and find one and i'll post the spec up here, i've rep'd you all btw

cheers

Grant