Hey all!

Been a very long while since I posted. Just needing some advice...

I have setup in my car 2x Pioneer 10" TS W256 Subwoofers running in parallel via a Pioneer GM-7300 Mono Bloc Amp.

However, I'm not sure how much this should be pumping.

Without the bass boost up on the amp and the bass slightly turned up on the headunit, I'm almost getting no punch at all from the subs. When i do, they sound great! But should i really be having to do this?

The enclosure is the correct size and completely sealed. Both subs are in isolated chambers.
Is there anyone else out there running a similar setup that i could listen to just to get an idea of what my equipment should be capable of?

Or even if someone would be nice enough to come listen to my system and give me some first hand advice please?

Any ideas?! Thanks.

Have you got the phase correct? (Subs receiving the correct polarity on their terminals) Otherwise check what your low pass filter is set on, amp could be cutting off frequencies that excite the sub the most, therefore no kick.

Have you got the phase correct? (Subs receiving the correct polarity on their terminals) Otherwise check what your low pass filter is set on, amp could be cutting off frequencies that excite the sub the most, therefore no kick.

The phase is 100% Correct! As I mentioned, when the bass is turned up, it gets some really good bass coming through, but i just feel like it's not as loud as what it should be... maybe i'm expecting too much?

The low filter is set, prob to around 80-100hz. I have fiddled with that too, with no major difference in volume.

80hz is too high i had mine set to 50hz 12's in sealed enc's they played much much lower than that though....

best to start with all settings flat and fiddle from there... i dont like using bass boost or loud or anything like that

80hz is too high i had mine set to 50hz 12's in sealed enc's they played much much lower than that though....

best to start with all settings flat and fiddle from there... i dont like using bass boost or loud or anything like that

Well, I've tried setting it lower, around the 50-60 mark... but i still have to turn on the 'loud' and the bass boost on the amp to get any satisfaction.

It's driving me nuts.

I take it your gains are up?

I take it your gains are up?

What are gains?



JK....


yeah, they're up dude. Not all the way, but almost.

might be best to turn everything on the amp back to zero, and retune the amp.

have you changed anything else in the system - other speakers etc, since the amp was first tuned?

might be best to turn everything on the amp back to zero, and retune the amp.

have you changed anything else in the system - other speakers etc, since the amp was first tuned?


Nope, nothing has been touched... Its not like it USED to be loud, and now its not... I was just never that punchy.

I think i really need someone else to listen to it who has heard plenty of other systems to give me a true comparison.

how much power does the amp put out?

What voice coil config are your subs? What load are they presenting to the amp?

how much power does the amp put out?

What voice coil config are your subs? What load are they presenting to the amp?

Subs are 4 Ohm Single Voice Coil, being running parallel, therefore presenting a 2 Ohm load to the amp. The amp is 2 ohm stable, and puts out 360w RMS @ 2 ohm.

The subs have a nominal power rating of 350w so it should be perfect amount of power...

Maybe its the box... too small maybe? I don't know, i've measured it time and time again and it appears correct.

Ahh there's your problem not enough power.

The subs can 'take' probably 3 times that (with headroom)

If they are rated at 350 w then the two of them can take 700 w.

Get a bigger monoblock. Say 800 w rms.

Im assuming the rest of your setup is amped as well. (fronts)

You may have your gains too high on your front stage amp, suggest setting your gains again. You should be able to use the full range of your headunit. If you are getting to distortion point well before you get to 100% on your headunit then your gains are too high.

To set gains. turn them all to minimum. play some music, turn headunit up to just before distortion point, 70% on cheaper headunits 100% on better headunits. Then slowly raise the gains until you start to distort. then dial it back a bit so you are in the safe zone.

End of the day you get what you pay for. gear that is rated at 350 w will only put out that much. bass boost etc will not change this. If you want higher quality/ louder music you have to pay for it.

Good luck

I went and saw a few guys at some audio shops, and they think I'm just expecting too much from my 10's.

They recon the amp is substantial, but the subs are too small to push the amount of air i want.

I don't know, too many people saying different things.

I wanna test my amp with some other subs, and possible test my subs with another amp.

Best solution, get your hearing checked :bowrofl:

Good thing is, unlike head units and speakers, if you can find someone, you can easily swap the sub and pretty easily the amp, to see what difference they will make. Im thinking if you go to a smaller car audio shop and they have some subs in a box in the showroom, they may let you try it out in the car if its as simple as connecting two wires????

Your amp is that big, but should still get OK bass. Problem is everything thinks different of OK. Maybe because you are running two subs they are not getting enough power.

If its possible, can you wire the amp up to just one sub, since they have isolated boxes? That would be interesting to hear, because the subs could handle more, I reckon one sub might sound louder. Anyone else got thoughts on this???

Ollie

Has anyone else on here using a Pioneer GM-7300 Mono bloc and what sub(s) are you running?

What headunit you got dude and what volume you turn it up to? e.g. 52/62.

What headunit you got dude and what volume you turn it up to? e.g. 52/62.

I've got a Pioneer DEH-6850 H/u

Max volume i think is like 51 or something, i usually listen to it at about 35 to 40.

If I ran a DVC 12" sub at 2 ohm, I'm assuming this will sound better.
Went into JB today and they suggested the same thing - running a single 12 rather than 2x 10's.

Looking at the JL subs, their power ratings are about 300w RMS which should be perfect for the Pioneer GM-7300 running at 360w RMS @ 2 ohm.

Any thoughts?

turn it up till the boot pops off or a window blows out, then turn it down 1 notch. LOL

download the bass test song, in my car it really hurts :nutkick:

that depends on what one you get. i got a copy of one and it was lame. i could get better bass out of other songs i had.

I've got a Pioneer DEH-6850 H/u

Max volume i think is like 51 or something, i usually listen to it at about 35 to 40.

If I ran a DVC 12" sub at 2 ohm, I'm assuming this will sound better.
Went into JB today and they suggested the same thing - running a single 12 rather than 2x 10's.

Looking at the JL subs, their power ratings are about 300w RMS which should be perfect for the Pioneer GM-7300 running at 360w RMS @ 2 ohm.

Any thoughts?

2x 10's will have a much greater cone area than a single 12. JB don't know what day it is half the time. Comparing what you are looking at, yes the JL will have better SQ than those Pioneers and if it is in a ported box it will be as loud, if not a little louder due to its suspension. I am not to sure what you are wanting to accomplish here. If you want really loud dam my ears hurt perhaps you should look at DD? You will need more power though.

You should be able to turn your system up to 3/4 max volume and have the gains no greater than 70% ( NO bass boost, EQ flat ) to achieve max volume off your deck (2V outputs).

Ahh there's your problem not enough power.

The subs can 'take' probably 3 times that (with headroom)

If they are rated at 350 w then the two of them can take 700 w.

Get a bigger monoblock. Say 800 w rms.
^^^

Your problem isn't the subs dude, it's the power, get a better amp.
Having said that, perhaps your expectations are simply too high, so get a new sub and amp! :P

^^^

Your problem isn't the subs dude, it's the power, get a better amp.
Having said that, perhaps your expectations are simply too high, so get a new sub and amp! :P

Maybe the next thing we should ask is budget?

Seriously dude the minimum power that I have run a single sub with is 450WRMS.

Focal 1.800 are going cheap now :D

Try disconnecting one of the subs, I have had problems trying to power two 4 ohm subs with one amp. I'm no expert, but one of the guys in the shop recons it will only work properly with 2ohm subs, or a proper compitition amp.

Focal 1.800 are going cheap now :D
How good are those focals amps??? They seem pretty good, and considering how good there speakers are, it would be pretty cool to have a completely Focal speaker and amp setup

Ollie

Obviously there are better out there but for the money they are very compedative ( they just had a price drop ). The FP 1.800 is now RRP$699. What you will get is:
*800WRMS @1ohm 13.8V ( or 600WRMS @2ohm )
*2 Balanced power supplies
*Phase control
*Sub sonic filter
*LP filter
*S/N of over 100db
*Damping > 200 @4ohm
*7 protection modes
*Can be strapped
*Weight < 5kg