What Kind of MidBass are you running?

P

phreaknes

Registered
WOW I didn’t know there were some high end car audio heads in the forum. Well let me give you a little background. I've got a 1997 Lincoln Mark VIII blue on grey. I've got 6.5 MB quarts (QSD???) comps and a pair of Quart QSD 5.25 in the rear. Running on a PPI PCX 4125 for the front (bi amped) a little Alpine 2X25 for the rear and a PPI PCX 2125 for the Orion HCCA 12” I’m running a Alpine IVA-D900 into a Alpine PXA-H700 and XM radio. My question is I like the high end but the MB is suffering so how are you guys running your front end. I would like to try all options before I have to break down and get horns and a HUGE MB. So how are you guys doing it?
 
RE: What Kind of MidBass are you running?

at this very moment im using the dynaudio 340 system. its a 3 way setup with a 7", 3", and tweeter. im gonna probably sell off the mid and midbass and replace it with these 8" focal polykevlar midbass and morel wr-4's for mids that i just picked up. ive got a ppi pcx 2125 running my front stage right now (no rear fill for me) and ive got a pcx 2200 feeding 800 watts to my elemental designs 12a sub. im gonna get a nice 4 channel amp to power the mids and tweets with their own channel and send the 2125 for midbass duties once everything get situated. head unit is currently an alpine 7894. dont know how much longer thats gonna stay though. im thinking eclipse or this all in one clarion ive been hearing about (drz-9255 i believe). still kind of sketchy on clarion though so it'll probably be the eclipse. we'll see.
 
RE: What Kind of MidBass are you running?

Pk i'm game where do you have a 3 way setup in your front end? i've got the 6.5 in the "Modified" stock location and the tweeter in the modified stock location where were you able to fit a 7" 3" and tweet? Kickpanels?

Here are some pictures of the install
http://webpages.charter.net/jrollen/lincpics/

Its been finished for about 6 months I should have some more finished pics soon.
 
RE: What Kind of MidBass are you running?

WOW! What a project. Man those amps look sweet! But aren't you afraid some is going to steal them? They wouldn't last 2 weeks by me - LOL! Also, I wasn't aware that you could change the 5X7/6X8 opening to a any other size with just using a bracket - how cool is that! That has been holding me back for quite come time.

I have the Pioneer DEH-P9400MP head unit - let me tell you it is awesome. I am running to MTX amps, I forget their model numbers, but one puts out 75X4 and the other is a bass amp running my 10" bazooka tube. I took down the bridge in the trunk, where the stock amp is located. I modified it and replaced the stock stuff with the good stuff. On the inside I am running Infinity Kappa 5X7's, but I have beat on a couple of them and they aren't holding up. They never really satisfied me. Just like you I was suffering from no mid-bass and when I did turn up the freq, they just couldn't handle it.
 
RE: What Kind of MidBass are you running?

I'd be as wooried about the amps gettign hot as being stolen. You should tint the windows to help keep the sun off of them. Other than that, it looks very nice (are those your girls in the one picture? Very pretty!)

To help with the midbass you need to seal off the entire door with raamat or dynamat. You are probably getting some cancelation (although the qsd's aren't known for great midbass in the first place)


I was running Rainbow Pro 3 ways in custom kicks, then I switched to custom door pods. They were getting around 225 watts a side from a bridged kicker 800.4, and I was running a 2002 12" kicker L7 with an Adire Audio Revolution putting out 1600 watts. But my kicker amp finally kicked the bucket (RIP I loved that amp) and I haven't had the money to buy new amp (something about buying a V-10 ate all my stereo funds)




dj
 
RE: What Kind of MidBass are you running?

ive got the 7" in the 6x8 opening and the 3" and tweet in the stock tweet location. i didnt do any of it myself and now im wishing i did. the shop that did it literally taped teh mid and tweet into place with my sound deadener and the 7" was mounted on sound deadener instead of a baffle.
 
RE: What Kind of MidBass are you running?

Well I had those alpine 1507's in there last year and one of them blew up (it was old sitting on the shelf for a long while) I have uploaded some new pictures that show the cover that goes over the amp. I have a tube and fan combo that vents into the trunk. I've never had an amp shut down form heat. I've also got a tint in the back and rear sides. When you look into the car you can see anything the back desk looks like it would be stock (used an extra set of rear grills) All the side panels are hidden behind the stock grills.

To get those amps out of there you would have to take the sail panels out and the rear seats and the cover then get to the custom security screws. Even if you broke the back window you still can’t get them out. I've had the local kid that HAPPENS to come across a lot of car stereo come around while I was doing the install and he said he wouldn’t even try it. Knock on wood.

That bracket took no time to make I make it out of wood took me longer to change the blades in the jig saw.

http://webpages.charter.net/jrollen/lincpics/
 
RE: What Kind of MidBass are you running?

Naw not to worried 2way remote and I dont put my car anywhere where I think it would be harmed.

I am going to seal the doors this summer and maybe put a different set in there.

Got any pics of your kicks?

Yea I put the car on my RTA and getting some weird stuff happening in the MB area I put it out of phase and still get some cancellation so I dont know.
 
RE: What Kind of MidBass are you running?


Alright I got two pair Boston Acoustics Pro 6.5 components in stock locations powered by a jl audio 450/4.....one 12" JL Audio sub in sealed box powered by a jl audio 250/1....kenwood excelon headunit with sirius sat radio...kenwood music keg in the trunk holding over 50 CD's......i get a sweet sound out of this collection.:eek:
 
RE: What Kind of MidBass are you running?

i have yet to install my system in the mark but i have an IDmax on an arc cxl 2500

up front its brax helix componets on a brax 400 watt amp
ill be getting a new deck not sure what as of now its in my s10
pics at www.cardomain.com/flynfrog
 
RE: What Kind of MidBass are you running?

that sounds like its gonna be one hell of a system. im considering picking up helix's 75x4 amp to run my mid/tweeters but i may take the loss in quality and stay with the ppi's. ive also got a fresh thought of getting rid of my single elemental A series and getting 2 of the older O series and mount them IB on the rear deck. im thinking about mounting them just below the deck and cutting out part of it and making the deck the grill essentially. anyone know how i would go about bracing the board holding the subs? im worried about body flex if i do have to brace it.
 
RE: What Kind of MidBass are you running?

in all honesty id jsut build a box the whole open air thing never realy impressed me make a pretty glass box ive done a few

if you know any one with a mutang i have a badass one that will never be used its just sitting in the shop

the box i did for my blazer along with teh kicks can be seen here

http://members.cardomain.com/flynfrog
 
RE: What Kind of MidBass are you running?

[div class="dcquote"][strong]Quote[/strong]
in all honesty id jsut build a box the whole open air thing never realy impressed me make a pretty glass box ive done a few if you know any one with a mutang i have a badass one that will never be used its just sitting in the shopthe box i did for my blazer along with teh kicks can be seen herehttp://members.cardomain.com/flynfrog
[/div]


You probably just havn't heard the right sub in an IB set-up. Not every sub is obtimized for it. IB plays REALLY low. It doens't get quite as loud as a ported box or anything, but nothing beats the lowness of it, and the SQ is awesome. For our cars, it's basically like having a 14 cubic foot sealed box. You just have to watch the excursion. A sub will hit it's mechanical limits way before it's thermal limits.
 
RE: What Kind of MidBass are you running?

i dotn realy think there is a sub on the market that is optimized for IB and you can go below human hearing with a sealed box so why bother moving your tuning freq any lower that that

olso IB dont have much of any control over the sub since its in effect a verry soft suspnsion
 
RE: What Kind of MidBass are you running?

[div class="dcquote"][strong]Quote[/strong]
i dotn realy think there is a sub on the market that is optimized for IB and you can go below human hearing with a sealed box so why bother moving your tuning freq any lower that that olso IB dont have much of any control over the sub since its in effect a verry soft suspnsion
[/div]


Um, that is completly untrue. Here's a quote straight from Dan Wiggins, inventor of the Xbl2 technology used in the world famous Adire Audio Brahma and RE XXX, and president of Adire Audio,

"ANY sub can be used free-air. Free-air/IB is basically a large sealed box, from a performance standpoint. You do have higher system efficiency, meaning much less power required to get a given SPL level (this is a good thing!), and about the lowest extension you'll find (shallowest roll-off means the larger cabin gain of a car will typically extend any free-air sub into the single digit realm)."


Jason Winlsow, one of the best SQ competitors in the US, runs 3 IDMAX's IB on his rear decklid. He says his car literally flexes at 18 Hz. You can't easily get that from a smaller sealed box, which usually rolls off much higher than that.

As for what woofers to select, typically you'll want a woofer with either a low Qts and a low Fs, or a higher Qts (say 0.5-0.6) and a moderate Fs (28Hz+).

Basically in IB the effiency skyrockets, allowing high SPL with little power. But because there isn't as much pressure on the back of the sub, the power handling is reduced by half or more. Also becuase of the lack of back pressure, that's why it's best to have a sub with a stiff suspension, such as the XXX, DD 9915, Brahma, EDA series, even the L7 works well.

The key is to make sure you have the backwave COMPLETLY sealed off from the cabin to avoid cancelation. It's not as easy as throwing a slab of MDF back there. Everything has to be airtight. Trust me, if done right IB is much better than sealed, all the SQ, SPL, and using half the power (easier on the electrical and wallet)


Did you know that the Gates bronco (170+ dB's) is actually in IB install?


Hope this helps explain things a bit.
 
RE: What Kind of MidBass are you running?

DJ is compeltely right and described IB very well.

All a box does for a sub is basically act like a shock absorber to stiffin the suspension of the Sub. In a good IB setup the sub is actually using a compartment of the car which acts like a very large sealed box, which is why the responce is so low in most cases. Most cars have relitively small trunks so multiple large boxes are not an option.

However most cars/setups are not done properly for IB, as you need to seal off the trunk, ect very well. Which is impossible for most cars w/multiple subs, and w/o a lot of money. The Gates Bronco is an example of this.

I have a box with two 2.25 ft3 sealed compartments for my Nuke 15"s. I have yet to hear a system that can play as low and loud as my two subs. However they struggle dB wise with 45+ Hrz. THey peak at 33-35Hrz @ 145dB and maintain 140dB at 27Hrz. I have hit as high as 149.6 with the system with no interior and a 35hrz burp. That was years ago.
I choose this box configuration because on the premise that my Dynaudio midbass would be a little bit better performer than they turned out to be. Midbass is hte only think the dyn 7" lacks.
 
RE: What Kind of MidBass are you running?

I got a lot of power on them, and i sealed up the door pretty well. the only other thing i could do is make an enclosure for htem, but depth is so limited already.
 
You must log in or register to reply here.
Back
Top