This is the system that is in my car at the moment. just wondering if theres anything else i can do?

It is as follows...

JVC SH909R Deck

2x DD 6.5 inch mids in each door in Custom MDF pods
2x USD 15" Horns running active
2x DD9515's in a 11 cube fiberglassed mini wall

Boston GT28 (1250W RMS) running just the front dd woolfers.
Boston GT42 (350W RMS) Running USD Horns and Rear Speakers.
Tru Technology SH-1 Sledge Hammer (4000W RMS) running subs.

Powered by a 120Amp Industrial Purpose Alternator and only 3 Delkor DC27 Deep Cycle Batteries ....

im going to invest in a EQ to set the horns up properly.

ditch the 15in subs and get some 10/12's and get some 8in mid's upo front to keep up with the sub and horns!

6.5" mids no matter how good they are will not keep up with all that!

warnings1 is right.. dump the 15s
.. thers is too mucn of a gap in your frequency spectrum...
going from 6.5 then your next speaker size is a 15? once again.. as warnings1 said.. no matter how good your splits are, theres just no way in the world you could call your setup SQ oriented with that sub.

your next best step would be to run some serious sound deadening/absorbing material into your car..

get another head unit. JVC??? no way...
it's still far different compared with some of the nice head units. like eclipse, nakamitchi, Alpine, denon etc.
you'll be amazed by the sound difference if you get a high end head unit

the jvc to me is still a respectable deck and the setup will still sound good if setup right. The money would be far better spent in at least 8 inch mids instead. the 6.5 will never never be able to catch up with a 15 incher with 4000wrms

The JVC was a $1000 deck when i got it but im getting a Clarion VRX935VD in dash dvd in the next few weeks

The DD6.5" Mids need to be heard to believed i looked at 8"s but i still dont rekkon they sounded any better than the DD6.5's, for all of u that think i need 8"s DD dont them. There also getting around 600W RMS a side...

The 15" subs are getting 2000W each, the DD9515 is that stiff that they are punchy as all hell and go very very loud.

Anyway as for sound deadning, thats the next big thing im going to do. But theres very few rattles in the car anyway as the whole back shelf has about 8mm of fiberglass over it and is actually the top part of the box.

Guys, AJ's car from what i have heard is so well deadened its not funny.

Also those 6.5inch DD's have so much bass that majority of 8inchers wont compete, let alone two pairs.

I'd look at getting some sort of high end headunit that has a good panaramic EQ and many other small frequency adjustments.

I'd seriously look at an Alpine 9815, it can run the tweeters active, has a paramic EQ which would help a fair bit and Bass Engine is very very handy at tailering the bass to ur taste.

Never used those horns, dunno if they are decent or not, an EQ might not fix much. Remember a flat response curve actually sounds bad. So a 31band EQ may be overkill.

the JVC sh909r HU is a damn fine SQ head unit.

i got one in the GF's car and it is brilliant!

it also has a Parametric EQ but i nice 32 band would be better.

there are alot of capbable 8in mids out there that will go alot louder/lower than the DD 6.5's

either that or get some 10in DD in there.

other wise all you car is, is a SPL that plays some sort of music!

if you want to do SQ do it properly

If you havn't done your sound deading yet, then that would be my first pirority.

I still think upgrading the head unit would be my first priority. if you are gonna get a DVD i would not consider clarion or Pioneer etc. I would only consider Alpine. i've seen many brands of TVs in car, the best is Alpine. clear pictures and excellent sound quality. There is nothing wrong with pioneer or Clarion ones but Alpine ones are just in a higher league. you'll notice the difference when you see it.
There is nothing wrong with JVC head units but i can guarantee you that Alpine or Eclipse Denon etc head units will give better sound quality.

sound deadening is a must too.

have you had any personal experiance with top of the range JVC HU's?

i've listened to the JVC SH909R deck b4 i thought it was nice. but compared with higher end units it's still below.

High end units i am talking about Alpine F1 status, eclipse 8061 etc. I have heard these units played in America. they are amazing.

I guess Unkle~fudd does'nt know what he's talking about if he is trying to compare JVC with these high end units. wasting my time

did u listen to the HU in the same car and at the same time or are you basing you opinions on complete didderent setups?
there can be a huge difference as you should know on different speaker/amp/tuning setups.

anyway i think this system need attention in other places that just the HU dont you think?...............

8" front stage isnt' required,
6.5" drivers handle upper midbass, then there's the 2X15" midbass drivers.
what've you got making LOW frequencies? (under 40Hz)
i'd be looking at a ditching your 15" midbass drivers,
look for a sub that will play low,
the 9515's might be flat to 45Hz, where most fundamental bass notes are, but i bet there's nothing under 35Hz, (relative to 45Hz) ESPECIALLY since you've lost most of the car's transfer function, which boosts lower frequencies, (installing a wall might reduce cabin space, but it theoretically harms your bottom end, then again, most walled setups are tuned high anyway)
get some new subs that play low, and flat.
Boston Pro's Adire Brahma or my favourite RE XXX
www.reaudio.com
not currently sold in australia tho

you might find this creates a gap between your 6.5"s and your new drivers, then you'd be wise to look into 8" drivers.

an EQ for those horns is definately a good idea, but try the one in your new HU first, most of the high end decks have 5+ parametric bands, which is often enough to smooth out your front stage.

expermient with different mounting positions and angles for your horns.
horns were made for imaging, so don't just chuck them in there anyold how.

that bits i understand LEAST, are:

why you put DD's in an SQ car,
they might come from the PA industry, and they might be used for high end concernt system etc, but they were never designed to be played under 40Hz you're missing a whole octave!!
EV PA Sub bins are dual 18" drivers ni a 6th order manifold bandpass enclosure, the box would easily be 14cuft, get they aren't intended to play under 40Hz, because the P.A industry isn't interested in low bass, as it's hoistorically designed for live acts.

why you ask for suggestions, but whenever anyone makes one, you give reasons why you want to keep it that way.

i see only 3 reasons for postnig this:
1 because you have a legitimate problem with SQ in your car and want to improve it
2. you want everyone to know how good yuor system is.
3. You're advertising for Phil, trying to fool everyone into thinking DD make SQ drivers.

u never been to a TOOL concert ay ay ay, damn i thought i was gunna be sick, the bass was so low and loud!
but thats about the only one



*cough* *cough*

OMG if that isn't the biggest anti-DD spam I've ever read. Amazing how much you know about DD, yet you have never heard a DD in a non-SPL system.

How do you explain cars I've built that hit 145+ at 35Hz from a single 15?

For your information Mr Bob, the reason most pro-audio speakers aren't designed to play below 40Hz is that virtually no music is recorded that low, except for the odd pipe organ or the such. This is more a function of enclosure design, not driver design, why sacrifice half your useable output in order to achieve response at a frequency that will never be played?

You have so much to learn.

Phil

SQ forum phill, not SPL???

SQ isent about numbers

oh and 35hz is still a little high for my likeing.
my sub dosent play anything over 40hz

forgive me if i've missed it, but where are the tweeters in this setup??

If you havent made any decisions yet, take a look at the Vifa XT25 to accompany the DD mids if you decide on them. Apparently the two complement each other very well, though i have never heard either myself.

The point was to demonstrate that DDs go as low as you want, contrary to Mr Bob's ill-informed assertions.

Phil

he is using USD horns tiger

and phill re read my post, i was edidting it as u posted

ahhh horns. My mistake, Im not an SQ boy yet.

get back in ya own forum

I'd vouch for the JVC 909R. I have one and am very happy with its performance.

As for getting a 8061 or alpine F1, maybe AJH83 actually has a budget and is happy with what he has...

As for using DD for SQ, go for it. It may prove others wrong, or you might be proved wrong, you'll never know if you don't try it. I think that the system has it's merits and flaws.

Don't forget the KISS principle - and it works well in SQ setups. As you say - you are using 2x15 DD's in a mini wall - you doing SQ or SPL? 3 batteries? don't over-complicate the system.

Refine the system plan a little and i think you'll be happier

Yes Phil, it's Anti-DD, because it's THE TRUTH.
Get the hell of your highhorse salesman tactics, because EVERYONE here is sick of it.

Because this is SQ, we make SPL sacrifices to achieve better sound. unfortunately the audio demon requires sacrifice of volume at a particular note to achieve linearity. the notes ARE played, but you've never put together a system that can play them properly.

How many times do i need to say that 35Hz isn't low! my single 12" can do 133 (on termlab roughly 141 on your meters) at 26Hz. with only 1kW

YES Phil SQ is only about fundamental recorded sound...
:roll: :roll: :roll:
ever heard of harmonics? the next harmonic is usually 1/2 the wavelength of the primary note. and on most bass notes (40-80HZ) this will be between 20-40Hz..
ever heard of imaging/staging/dynamics? or sibilience, attack, transients, texture?
there is more to SQ than just frequency response and clarity. but the DD's don't even do that well!

you've got alot to learn, so get some knowledge before you preach your product, and prove that you're an ignorant fool.
i thought DD was a good product until you started pushing it, you'ev shown me the light!

DeeCee, i don't think Phil's authorised to sell Eclipse or Alpine, certianly not F1,
pretty sure that AJH83's car is built by Phil (it hasn't been denied) and most likely sponsored by Phil, including posting "rave reviews" about DD here.