How should this sound?

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Vandals909

Copper - Posts: 88

Joined: September 28, 2004

Posted: December 16, 2004 at 11:13 AM / IP Logged

I have a chevy silverado extra cab and was wondering how you guys think this system would sound with the proper install of course.

Mb quart QSD216 for the front doors.

Jl 450/4 to run them. Open to cheaper options! (opinions please).

2 IDQ12 v.2's in a sealed enclosure

Jl 500/1 to run them.

How should the Sq and SPl be in this setup with it all installed properly?

/r7

Silver - Posts: 340

Joined: July 30, 2004

Location: Canada

Posted: December 16, 2004 at 1:05 PM / IP Logged

it will be loud.

im curious how you came to the conclusion of all this. i dont want to be presumptious and say you heard good things about all the company's you are thinking of buying from. If thats to be assumed, and its true, (about the company's) having higher end products from Company's whom offer a high quality product all around would probably give you a well rounded stereo for quality. i cant say anything about the quality of this setup because we first off dont know what deck you are using, if we run into noise problems after the install (they are possible in any install as far as i see).

aside from that though which is a primary factor, your setup should play better than factory and possibley less than a complete install of Eclipse, or some of the higher end SQ Amps like TRU or McIntosh or even Zapco.

but you will be pleased with it.

If you really want that based on your own conclusions of what you know of the products then buy that setup.

:/ sorry i couldnt be more help.

Vandals909

Copper - Posts: 88

Joined: September 28, 2004

Posted: December 16, 2004 at 2:58 PM / IP Logged

So what all would you recommend then? I have listened to the quart pce-216 and thought they got distorted easily. Everything else I have listed I have never listened to, I have just tried to see what will fit properly and went off all of the comments that everyone has made about those products. I figure on the IDQ12 v.2's because they are supposed to have great sound quality and they are the only 12's I can fit under the seat of my truck that will have the proper airspace for each one. As for components and amps. I'am open minded to all suggestions. I just hate going into car audio stores and having them try to sell you anything that they are trying to push to get rid of. This is why I have tried to research things on the forums. As for a head unit I like the Pioneer 7600 or 8600mp. Thanks for all the help and suggestions!!!

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Platinum - Posts: 5,352

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Joined: November 01, 2003

Location: Alberta, Canada

Posted: December 16, 2004 at 3:33 PM / IP Logged

If you were listening to the PCE216 speakers and they distorted easy....then the guy who was playing them for you did not have them set up properly. The JL amps are nice amps, they are not a public eyesore and are generally quite small. They are a little pricy however. Consider the Eclipse amplifiers as well as Audison (nice small amp as well). For a head unit.....shelf the idea of how it looks and concentrate on how it performs. Consider the Eclipse line of cd players, in particular the CD3434 or CD5444. Best move you will ever make. For the door speakers the Qline of Quarts are an amazing set of speakers, make sure that you add a good amount of brown bread to the doors to keep them from resonating all over the map (robbing midbass at the same time). I use the PCE216 myself and properly set up, I have had no issues with distortion at all.

Top Secret, I can tell you but then my wife will kill me.

Vandals909

Copper - Posts: 88

Joined: September 28, 2004

Posted: December 16, 2004 at 3:40 PM / IP Logged

I wouldnt mind saving the money and buying the pce216, are the Q line that much better? Also what amp do you have running them? The guys at the stereo shop said something about not a big difference between the pce and the QSd if I dont did (no sure hear) but crossovers or something setup for the QSD's. Also how many ohm's should I buy the IDQ12 v.2 in? They are dual voice coil. They offer them in 2 or 4 ohm which would be better? Also what is so much better about the eclipse head unit? Thanks for all the help guys!

Vandals909

Copper - Posts: 88

Joined: September 28, 2004

Posted: December 16, 2004 at 4:29 PM / IP Logged

should I buy these subs in 2ohm or 4ohm , they are dual voice coil I believe. Thanks!

dragonrage

Copper - Posts: 193

Joined: March 15, 2003

Location: United States

Posted: December 16, 2004 at 5:01 PM / IP Logged

Vandals, you want to give your amplifier the highest resistance possible while still achieving the power/volume level you want. Even if an amp can go stable at 1 ohm, it will sound better with lower loads (higher impedances) because of the damping factor. What this means is that the less an amplifier is loaded, the more control over the speaker it has. Because voltage is proportional to impedance, the higher the impedance of the load, the more of the voltage is dissipated in the load instead of in the transistors. To put it simply, lower impedance = sloppier bass

That having been said, I will list the impedance configurations with 2 speakers for speakers with whole number impedances. Everything below is for 2 identical speakers, so I won't say 2 speakers every time.

SVC, you can get 1/2x or 2x the impedance of a single coil

8 ohm SVC: 4 ohms, 16 ohms

6 ohm SVC: 3 ohms, 12 ohms

4 ohm SVC: 2 ohms, 8 ohms

2 ohm SVC: 1 ohm, 4 ohms

1 ohm SVC: 0.50 ohm, 2 ohms

DVC, you can get 1/4x, 1x, or 4x the impedance of a single coil

8 ohm DVC: 2 ohms, 8 ohms, 32 ohms

6 ohm DVC: 1.5 ohms (this is what I run, on a 1 ohm stable amp), 6 ohms, 24 ohms

4 ohm DVC: 1 ohm, 4 ohms, 16 ohms

2 ohm DVC: 0.50 ohm, 2 ohms, 8 ohms

1 ohm DVC: 0.25 ohm, 1 ohm, 4 ohms

QVC, you can get 1/8x, 1/2x, 2x or 8x the impedance of a single coil

8 ohm QVC: 1 ohm, 4 ohms, 16 ohms, 64 ohms

6 ohm QVC: 0.75 ohm, 3 ohms, 12 ohms, 48 ohms

4 ohm QVC: 0.50 ohm, 2 ohms, 8 ohms, 32 ohms

2 ohm QVC: 0.25 ohm, 1 ohm, 4 ohms, 16 ohms

1 ohm QVC: 0.125 ohm, 0.50 ohm, 2 ohms, 8 ohms

In a bridged amplifier, your maximum load is (Max load for a single channel) * (Number of channels you bridge), so if you bridge 2 channels on a 2 ohm stable amp, you can only go to 4 ohms. If you bridge all 4 (your amp SHOULD be able to do this if you can bridge 2, as bridging just means putting the amplifiers in series) then you can do 8 ohms. Either way (2 channels by bridging in 2 groups of 2, or 1 channel bridging all 4), you're going to want to pick the same impedance. (I had said 8 ohms before I edited, but disregard that if you saw it, I had a brain fart when I said that)

2009 Pontiac G8 in planning stage

HU: ?

Speakers: ?

Amps: ?

Vandals909

Copper - Posts: 88

Joined: September 28, 2004

Posted: December 16, 2004 at 5:56 PM / IP Logged

So get 2 2ohm subs and together they will be 4ohm and the amp will run them as 4 ohms? Sorry I'am still trying to process all this info!

dragonrage

Copper - Posts: 193

Joined: March 15, 2003

Location: United States

Posted: December 16, 2004 at 6:21 PM / IP Logged

Oh, I just noticed that you listed a 4 channel and a 1 channel amplifier. Forget what I said about bridging, then. It is true, but doesn't apply with the 1 channel.

Just pick anything above that comes out to an impedance greater than or equal to what the amp will handle. The lower the impedance, the more volume, but the sloppier it will sound. However, JL amps have pretty high damping factors so it should sound good even if you load it to its max. I believe that amp is 1 ohm stable, so I would probably get a couple of 4 or 6 ohm DVC speakers.

2009 Pontiac G8 in planning stage

HU: ?

Speakers: ?

Amps: ?

kfr01

Gold - Posts: 2,121

Joined: April 30, 2003

Posted: December 16, 2004 at 6:46 PM / IP Logged

I answered all the questions about wiring those subs in your thread from a few days ago.

Buy the 2-ohm dvc ones. Wire them like the picture.

I also run the PCE216 set. I've never had a problem with distortion. I agree with forbidden. Whoever was playing them for you must have been doing something wrong... or was intentionally screwing up to upsell you on the more expensive Q line.

I did prefer the sound of the Q line when I listened, but that's to be expected, they're much more expensive speakers.

I like JL subs. I dislike the sound of JL's current component speaker line. Their amps are neutral for me. I have some friends that swear by them. If you have a good deal, go for them. They're a good honest and reliable product. Once at a minimum level of competency I'm not sure how much difference switching to another brand amplifier makes in car.

New Project: 2003 Pathfinder

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