Msg4lifesucka Posted November 29, 2013 Report Posted November 29, 2013 So I'm planning to do a single zv4 18 fourth order wall in a Subaru Outback after the rear seats (C pillar). I'm thinking the ported chamber could be about 8-9 cubic feet tuned to about 45-50 hz with about 135 square inches of port area and about 5 cubic feet of air in the sealed chamber. With all of this on a Crescendo bc3500, how do you think this could do with all that other cabin space in front of it? what im really looking for is to move as much air as I can. I love them lows, 15-35 hz range. If any body could give their 2 cents, that would be great.
SnowDrifter Posted November 29, 2013 Report Posted November 29, 2013 Why wall a single 18? Just run it in a normal ported box below the window line IMO ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444
Msg4lifesucka Posted November 29, 2013 Author Report Posted November 29, 2013 Yea that was the first idea. Just never have seen a single 18 in a wall before, ya know?
SnowDrifter Posted November 29, 2013 Report Posted November 29, 2013 Up to you... But are you willing to give up your rear window for just a single 18? However I will say with a 4th order: Size your sealed chamber to get the power handling and the sealed resonant frequency (impedance peak) you want.Then tune the front chamber to that frequency. Adjust your ratio by shrinking or expanding the PORTED chamber. Not the sealed one ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444
Msg4lifesucka Posted November 29, 2013 Author Report Posted November 29, 2013 You have a point there... And thanks for the advice. How could I tune it to the impedance peak may I ask??
SnowDrifter Posted November 29, 2013 Report Posted November 29, 2013 Best bet would be an IM-SG or DATS (Dayton audio test system)I suppose you could run some clamp tests too to calculate your impedance peak too. ~~~~~~~~SAY NO TO PHOTOBUCKET~~~~~~~~ Snow's DD-1 tracks here: https://www.stevemeadedesigns.com/board/topic/167433-snows-dd-1-tracks/ My take on OFC vs CCA: https://www.stevemeadedesigns.com/board/topic/110381-things-that-piss-you-off-in-the-car-audio-world/?do=findComment&comment=2461444
DylanBunch Posted November 29, 2013 Report Posted November 29, 2013 i also heard 9/10 times, you sealed resonance frequency will be the peak frequency on a term lab 2006 Ford Explorer 2 Team AA/Sundown 15s 6th order Ct Sounds 7k 4 PRV Mr500 8s Rockford p1000-2 Team Subsonic Lows
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