Zach95SE

iTrader: (3)

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

Gramdacious

iTrader: (1)

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.

Zach95SE

iTrader: (3)

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.

Gramdacious

iTrader: (1)

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

Zach95SE

iTrader: (3)

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.

Zach95SE

iTrader: (3)

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.

Gramdacious

iTrader: (1)

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.

505max94se

iTrader: (15)

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

Gramdacious

iTrader: (1)

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.

505max94se

iTrader: (15)

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.

Gramdacious

iTrader: (1)

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

505max94se

iTrader: (15)

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

Gramdacious

iTrader: (1)

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

505max94se

iTrader: (15)

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.

Dragon

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.

Zach95SE

iTrader: (3)

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?

slickrick

iTrader: (12)

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.

Gramdacious

iTrader: (1)

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

slickrick

iTrader: (12)

or port them and tune at about 35hz.

Gramdacious

iTrader: (1)

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?

slickrick

iTrader: (12)

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.

Gramdacious

iTrader: (1)

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

Zach95SE

iTrader: (3)

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.

danhaman

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

Gramdacious

iTrader: (1)

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

slickrick

iTrader: (12)

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

AscendantMax

iTrader: (7)

slick's such a noob

jk

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

slickrick

iTrader: (12)

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.