posted
any of the experts in here have any good tips for better SQ?...im kind of leaning towards on the SQ side rather than SPL now, so any help would be appreciated, I know eastcoast has a bunch
-------------------- 2002 Mazda Millenia SS Alpine CDA-9815 (4SALE) Alpine TME-M790 2) Phoenix Gold 10" Titanium Subs 2) Kicker S12L7 Subs (4SALE) 1) NIB JL Audio 12W7 Sub (4SALE) Hifonics Brutus BX1500D (4SALE) JL Audio 300.4 JL Audio XR653-CS JL Audio XR650-Csi SPL 1.5 Farad Digital Cap (4SALE) Sony Playstation 2 Optima Yellow Top D34/78 Posts: 1117 | From: Cali | Registered: Oct 2003
| IP: Logged |
posted
Whatcha want to know? Throw out some topics for discussion...
-------------------- Team Image Dynamics/Werewolf Team Second Skin Audio Sick Bastard Audio SQ Who feels it knows it Posts: 8009 | From: Charlotte,NC USA | Registered: May 1999
| IP: Logged |
posted
heres a good topic - Crest Factor sub topic - how it relates to overhead
Posts: 3421 | From: Owosso MI, USA | Registered: Apr 2001
| IP: Logged |
Tuning flexiblity is a must, as much as you can get/need ie-crossover points, slopes, driver placement and angling, EQ is a plus.
Run as much power as you can
Keep things as simple as you can.
Get some good test material.
Know what to look for.
Lots of trial and error.
Its late, but if you are a tad more specific, there are tons of topics people here would love to sink their teeth into.
Kan3, I would be interested in hearing more about crest factor.
Incidentally, though I appreciate the nod, I am not so much as a speck of a germ on a piece of fly-poop in comparison with the people and knowledge lurking in this section of Termpro, I would not presume to even consider myself on the same level. I'm just an avid enthusiast learning as I go....
Posts: 2276 | From: East | Registered: Jan 2003
| IP: Logged |
posted
The most important thing is to trust your ears over what anyone on a car audio board or in person tells you. After that you are into testing, testing, and more testing. Every car is different, everything you do to a system has an impact (positive or negative), and you are never done.
quote:Originally posted by Robby: Give us some pointers on box design. ported vs sealed vs bandpass vs whatever
That is all sub and car specific, nearly impossible to give pointers with no criteria or subject. Some subs are made to be ported, others sealed, some made to be IB. Using the sub in an enclosure that it was not intended for has a good potential for bad results.
IMO, the sub is the last speaker I worry about, its the midrange keeps me awake at night Posts: 2276 | From: East | Registered: Jan 2003
| IP: Logged |
quote:Originally posted by kan3: heres a good topic - Crest Factor sub topic - how it relates to overhead
Overhead? You meaning headroom?
-------------------- Team Image Dynamics/Werewolf Team Second Skin Audio Sick Bastard Audio SQ Who feels it knows it Posts: 8009 | From: Charlotte,NC USA | Registered: May 1999
| IP: Logged |
quote:Originally posted by Thedrumming2ba: How about imageing? (sp?) Any good tips tricks or bits of advice for this?
Justin
Pathlengths, phasing, pathlenghts, and pathlengths.
I think that we had a good long post about this a couple of years ago...if I can't dig some stuff up, I'll start to work on a couple of topics.
-------------------- Team Image Dynamics/Werewolf Team Second Skin Audio Sick Bastard Audio SQ Who feels it knows it Posts: 8009 | From: Charlotte,NC USA | Registered: May 1999
| IP: Logged |
posted
crest factor by definition is the difference between the peak and the rms of a wave.
it is generally expressed in positive decibels, for example a pure sine wave has a crest factor of 3db, when showing this value you start with PEAK power and you ADD to it
I find it easier to express in terms of negative decibels, for example a pure sine wave has a crest factor of -0db, when showing this value you start with PEAK power and SUBTRACT from it
here is a reference chart
Now if we were going to take this chart in terms of negative decibels then: square wave/full clipping = +3db sine wave = +0db(or RMS) AES pink noise = -3db
now the crest factor of music is quite large...ranging anywhere from -25db to -3db...that means that the loudest most compressed music will never draw more then a 50% power from an amplifier with properally set gains
I've done plenty of wave maps on a lot of songs I consider "loud" and I have yet to find one with a larger peak then -3db(the loudest rap/synth sounds I've found are in the -10 to -3db range)....once you start crossing this line it will no longer sound like music
I'm sure its pretty easy to see how this ties in with headroom...and its also pretty easy to see why people clip their amps
posted
I was talking to a competitor the other day about staging, and from what he was saying, you' want the soundstage to be around eye-level and extend a couple inches outside of the car, correct?
I've got a question about speaker pathways though. If using kick panels or door panels, would your legs get in the way of the speaker paths? Also, what about mounting on top of the dash and/or in the A-pillars?
Justin
-------------------- Hooked on sonics worked for me! Posts: 766 | From: Tucked65's Trunk | Registered: Mar 2003
| IP: Logged |
quote:Originally posted by Thedrumming2ba: I was talking to a competitor the other day about staging, and from what he was saying, you' want the soundstage to be around eye-level and extend a couple inches outside of the car, correct?
you can setup your stage ANYWAY you like, sq is what sounds good to you and the depth of the stage falls into this
quote: I've got a question about speaker pathways though. If using kick panels or door panels, would your legs get in the way of the speaker paths? Also, what about mounting on top of the dash and/or in the A-pillars?
usually the most sound comes from the driver on the other side of the vehicle, also when you are in the process of aiming your kicks you position while taking your legs and seating into account
Posts: 3421 | From: Owosso MI, USA | Registered: Apr 2001
| IP: Logged |
![[Smile]](smile.gif)
![[Wink]](wink.gif)
Printer-friendly view of this topic