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z06killinsbf

CEG'er
Joined
Apr 4, 2008
Messages
171
Location
McKinney, TX
I have a set of Image Dynamics IDQ-10 DVC's that I would like to use in my Contour. What is the best way to face these for good overall sound quality in a street car while still maintaining luggage space? Also will be powered by a Audiobahn amp. I forget the model# but at aroud 400w.
 
SoundQ SVT said:
*sigh*

not again....

If you would do a search on "facing", this has been hashed out in the not too distant past.....

http://www.contour.org/ceg-vb/showthread.php?t=32233&highlight=facing

http://www.contour.org/ceg-vb/showthread.php?t=31558


Also, I think I'll mention to my friends at ID that I know someone using Audiobahn to power their subs. They'll freak out.
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What I got from that is basically what the owner prefers. I will probably build a down fire box and mold the amp on top.

What's wrong with Audiobahn powering IDs? Take what you can get. The amp was free and seems better than the SPL amp I was using.
 
z06killinsbf said:
What's wrong with Audiobahn powering IDs?
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Whats wrong with a using a 4 cylinder powered chrome dualy to pull a boat? I keed, I keed.. The subs that you have are very low power handling so you'll be just fine.

Its just that ID is one of the higher quality brands, and Audiobahn... well, lets just say I'm glad you got it for free because thats about what its worth. Its a bunch of crap stuffed inside a chrome case with blue LED's and marketed to kids in highschool parking lots. (ie the analogy I made above)
 
Used within their constraints, POS amps can perform OK. Not that long ago, I had a friend that placed pyramid amp guts inside of old school linear power chassis' he had picked up. It received rave reviews by everyone who heard it. The he revealed the secret and the same people had a revelation where they suddenly noticed all the faults.

Moral of the story? None. I just thought it was fun that he tore up old Linear Power amps and stuffed 'em with Pyramids. AFAIK, he was planning on doing the opposite, as well. Linear Power amps in the Pyramid chassis. I suspect they will suck until he points out the reality then they will become magically delicious because we are all just modeling clay for certain people.
 
dnewma04 said:
Used within their constraints, POS amps can perform OK. Not that long ago, I had a friend that placed pyramid amp guts inside of old school linear power chassis' he had picked up. It received rave reviews by everyone who heard it. The he revealed the secret and the same people had a revelation where they suddenly noticed all the faults.

Moral of the story? None. I just thought it was fun that he tore up old Linear Power amps and stuffed 'em with Pyramids. AFAIK, he was planning on doing the opposite, as well. Linear Power amps in the Pyramid chassis. I suspect they will suck until he points out the reality then they will become magically delicious because we are all just modeling clay for certain people.
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I kind of like that "study" he did. Just shows what a name can do to people. If someones system sounds good, no matter what they are running, it sounds good...nothing wrong with that. But just because they have a certain name doesn't always mean it is good or bad.
 
I like the little study with the amps too. I'll tell you something pretty simple. the brand of the amp? that is a badge on the case. what makes the amp quality or not has to do with the board design and the quality of the components. for instance, the amplifying transistor in a 22 watt x 2 jenen amp i took apart a long time ago, was a philips chip. the chip cost almost as much as the amp.

and if you must know, I had the amp because I was trying to put a JL8w0 on a go cart with a motorcycle battery. I was like 13

but to the OP, I have a pair of tens facing the floor and sound transmission to the cabin area is really good. FYI, bass doesn't really travel through the air as well as it travels through solid matter, and then "resonates" from that matter.

to test this, try taking your subs in the house, face them into the middle of the room. listen, try pulling a db number if you have a meter.

not take the subs and face them as close as you can to the wall without them touching. hear that? now put your hand on the wall. feel that? you just made an 8'X13' (or whatever size wall it is) speaker

the idea of a woofer is to use an electromagnetic tranducer to cause a large surface to vibrate at a low frequency. the floor panel of your car is a pretty large surface.

I've had good results with side firing too, but the seams for the doors limit transmission, and you also have to worry about cancelations with two opposed subs.
 
At this point, i must tell you that "de-coupling" the sub woofers from their environment is the desired goal of all audiophiles.

What is de-coupling? it is the exact opposite of what you described above, which is also known as "coupling".

The goal should be to hear the low bass music without feeling it in the chassis, or through the floor/furniture. The reason? Lack of control and clarity of the musical information (from things that are not, and are not designed to be a speaker) leads to a very bad listening experience.
 
agreed, but car audio subs arent exactly keff's either. and we sure aren't using class A amps either.

"coupling" the bass drivers to the chassis will get nice low freq energy to the front of the vehicle at a good SPL, and besides, I thought we all got subs because girls like vibrations?
 
You DID read either of the following, didn't you:

His name: "SoundQ"
His Signature:"5-Time Sound Quality Champion in IASCA, SLAP, and MECA"


....


This IS an SQ thread... not an SPL thread, so I don't see how advocating a coupled system would be something you could say "works" in an SQ environment.
 
KAOS_2.5M said:
agreed, but car audio subs arent exactly keff's either.
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...true. Some car audio subs are indeed better than Keff.

KAOS_2.5M said:
and we sure aren't using class A amps either.
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I don't know of anyone that is using much Class A amplification in car audio. It is highly inefficient and generates a lot of heat. Two big faults in an automotive environment. However, the better quality Class AB amps in an automotive environment have progressed to be the sonic equals of Class A with better efficiency and less heat generated. Class D amps, once relegated to only sub-bass reproduction due to poor sonic performance, are now appearing with very good sound quality throughout the audible spectrum. And they keep their efficiency, low heat generation and small footprint too.


KAOS_2.5M said:
"coupling" the bass drivers to the chassis will get nice low freq energy to the front of the vehicle at a good SPL, and besides, I thought we all got subs because girls like vibrations?
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um, no. How do you think making the seat vibrate will add to the pressurization of the air in the vehicle? It is, after all, "SPL" - Sound Pressure Level, not "SVL" - Sound Vibration Level. All the vibration that results from coupling to the physical environment actually detracts from the musical impact of an otherwise appropriate musical reproduction.

And no, I did not get subs to vibrate the girl. I got subs for proper musical reproduction (and to stimulate the girl's mind). It is the same issue between asking to "hear" someone's system as opposed to asking to "listen" to it. "Hear" and "Listen" may seem to be the same thing, but listening requires a deeper connection. I have always said no to people that asked to "hear" my stereo, but I will immediately offer to let them "listen" to it instead.

I think to get more enjoyment out of your own equipment, you need to graduate from "hearing" your system to "listening" to the music your system is reproducing.
 
I wasn't arguing that soundQ didn't know his shiz, just that audiophile stuff is a bit over the top for an average car audio set up.

I'll also add, I'm a bit out of date on the topic, since i havent read up on any of this in years.

I agree 100% about the "listening" vs "hearing" statement though.

I've got a carver holographer in the living room that makes that point pretty well.
 
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