How are MB Quart amps. Specifically this one
http://www.crutchfield.com/S-n7fQH8p...o&i=049RAA1000

I have 3 JL 10w's and run it on a Rockford P2002 but want more out of them. Supposedly they are run in series? To run at 1 ohm and it says 1000 watts at 1 ohm. So would this be a good buy and it is only $300. Thanks

Zach

 

That looks pretty nice. I have MB Quart components and they are badass. I've had them for like 8 years and they still bang, very reliable. If that amp is 1 ohm stable chances are it is a good quality amp. Hopefully it's class D and is very efficient, and stays cool. What JLs are you running? 10W what? That will depend on whether you want to run the amp at 2 ohms or 1ohm. What power rating your subs can handle RMS. If you want a less expensive amp that is high powered go with Phoenix Gold Octane. I have one, 800 watts, around $200 on eBay.

 

Oh my bad I meant to put 10w3 d6 or something like that. I think I'm going to try that amp. Maybe buy it tomorrow. But I wanna hear some more opinions.

 

Let me know how it sounds. If you need there are wiring diagrams on www.jlaudio.com just in case.

 

Would I want to run in a series or parallel. According to those diagrams I would want series/parallel right? Like this



Or would I want parallel/parallel? This is confusing the hell out of me because only this one says 1 ohm.

 

Anyway someone could explain those diagrams a little better here is the link to them. http://www.jlaudio.com/tutorials/wir...ex.html#3dvcpp

I am looking at the 3 DVC ones. I basically want to know which way to wire them up so that the amp in the first thread will run them best.

 

What's ohm rating on those subs. There are dual 6,4, or 2 ohm. It's gonna depend on what subs you have/choose. Are you talking about a 10W3v2s? I personally have a 12W3v2, is a 4 ohm model the D4.

 

Run them like the second (parallel/parallel) diagram because it'll be one ohm.

The other diagram will give you 4 ohms and that amp at 4 ohms won't push those subs enough

 

Yeah but how much power will those JLs handle? It might be too much power. I had to run my mono amp at 4 ohm(400 watts) cause at 2 ohms(800 watts) it's dangerous for my JL 12W3v2. He's running 10s.

 

The first diagram will give you 250 watts rms @ 4 ohms

The second diagram will give you 1000 watts rms @ 1 ohm

They're dual 6 ohm subs.

 

I would run them like the first diagram in that case.

 

I believe those subs handle 250 rms and 500 peak. He will be just fine at 1 ohm.

 

Which subs are they? Are they the 10w3v2s? Are they 10w3s?

 

I'm not sure but the old 10w3 handles 250rms and the 10w3v2 handles 300rms.
Either way 1 ohm will be safe with three 10's.

 

I just purchased that amp(MB Quart) to run my 2 Alpine Type R's. Its sitting on my floor now, Im fabricating a custom trunk set-up. It was definately a steal. Check my cardomain for some pics.

 

I'm almost positive on the back of the subs it says 10w3 then D6. Nothing about the wattage it can handle so I don't know how much to run. But you think if it is 500 peak then I will be fine running it like the second diagram right?

 

this might be totally OT but IMO dont run too much power over the rms unless you are good at setting gains. buddy of mine had 2 12 v2's on a 500/1 and those things bottomed out easily unless the gain was real low. granted it was on a stock h/u but i wasnt impressed by the system.

 

I was thinking the same thing. I have on 12w3v2 and i'm running 300 RMS @ 4ohms and it bottoms out quite easily. I definaltey had to fiddle with the gains. I couldn't imagine running at 2 ohms 600 RMS/800 max. That speaker would be toast. Time to step up to 12w6 or 12/7 for the power handling

 

or port them and tune at about 35hz.

 

slickrick,
how do you 'tune' them at 35? It is adjustable, or are you just stuck with what the box is at when you get it?

 

you adjust port length via how much wood for the slot port or how long you make a pvc port. like for a slot port lets just say for a 35hz tune its 17" long but for a 30hz tune its about 24.

 

I got it. And incorrect tuning can lead to the speaker not performing at "optimal" levels? Mine is about 17-18"s long.

 

Well I only looked at that one because it is 1 ohm stable. Mine now I think is underpowered for my subs. It is a Rockford P2002 specs:

50 W x 2 @ 4 Ohms RMS
100 W x 2 @ 2 Ohms RMS
200 W x 1 @ 4 Ohms Bridged RMS
Total power: 200 Watts
Crossover: HP 40-400Hz 12dB per Octave, LP 40-400Hz 12dB per Octave
Signal input: Low level - Quantity - 1 Type - RCA(pr)
Line output: 1 RCA(pr)
Class: A/B
Remote control: Included, Type - Wired, Controls - Bass
Dimensions: 2.4 X 11 X 11.7 (inches)

That isn't enough right? I mean I can tell the difference when they are on but they aren't as loud as my HE's that I had.

 

Gramdacius --

Kinda. It's the port volume that matters [length is just the variable that's usually easiest to adjust when making the box (or to make adjustable)]. If you tell us the volume of the box, and the volume of the ports, we can probably tell you what your box is tuned to. You usually don't tune a box to a sub, though. Most subs play relatively well throughout the spectrum of lower freq's [though some subs designed primarily for SPL applications may be better for playing at certain freq's]. Most people prefer to tune their boxes between 30-35Hz [+/- 2-3 Hz for personal preference] -- again, SPL folks look at the best freq for their particular car to maximize SPL, which tends to be quite a bit higher [doesn't translate to musically better sound, though].

Long story short, there's not an optimal tuning freq for any particular sub, it's just what sounds best to you [usually between 30-35Hz].

dh

 

Thanks for the info danhaman. I put my subsonic filter at about 30 so hopefully i'm playing it safe.

 

thanks dan for helping me out. i was in a hurry when i posted.

 

slick's such a noob

jk

anyhow...tune it low for sq, low to mid 30s for sql, and higher for spl.

 

that or im extremely lazy. for a ported box its all about a compromise between box size and tune. for sick low end tune to about 28 and make it a big big box.