HHR Ed

Also, for indoor dB drags. We usually have to push the cars up to the lanes, then are allowed to start once in the lanes. And Bass Boxing will be outdoors near the band shell I believe.

I do dB Drag and Bass Race. registration for each is $80. Did you see an extra $75 charge for power somewhere? I cant find any info about this on the SBN site.

are you building a wall then? I thought you were gonna have one sub in the back firing forward. The sealed box trick is to find the tuning frequency of your car, with the setup you described. A wall is completely different.

will the sub be firing forward or back? Tuning can be between 45-55hz You can always build a sealed box with a flat frequency response, and use that to test. Play a sweep and read the peak SPL. The frequency it peaks at will be the frequency you should tune at.

burping has nothing to do with tuning frequency. Do you have a wall? That box diagram above looks like a CRX or hatch back box. A wall in a maxima will be quite some distance from the dash. Tuning may be around 55hz. But the best way to tell is trial and error. You build the enclosure, then play a moderate volume sweep and use a termlab to tell you peak frequency. Then play that frequency at full volume and record your SPL. Then shrink the airspace of the wall and do it all again. If you dont have a wall and your sub is in the back, tuning will be much lower. The 2500 series is good, but not meant for 2500w. I see a blown coil in the future.

Why do you wanna tune it that high? What kind of car? Thats a tuning frequency for walls and CRXs Thats alot of power for that sub. Chances are that it will blow. A burp is simple, you just hit the un pause button at full volume on your selected track. Then there is a volume roll. Depends on the setup which may work better.

impossible to guess. what kind of box for each? what car? what ohm loads? I can tell that the DDs have more potential

Randy gave me Irish ducks. here I am bouncing them at 07 dB Drag Finals. http://video.google.com/videoplay?docid=6767030853585510127

There is a member on here named Randy, Assman is his display name. He has a van with 30 tens. His mascot is a rubber ducky. He gives them out at shows and stuff. I know where the duck mascot originated, but I am not sure if he wants me to share.

people have had problems with the XX series, but those issues were resolved with the XXV series. I used my XXV Maxximus everyday, I bass race, do SPL, demo for hours. Had it almost a year and longest I have played at high volume is 6 hours. No overheating, no protection. Just good music. It sounds great and performs phenomenally. I run at 1 ohm per channel and clamped over 5600w out of each channel. So yes, it does more than rated. It can do 15,000w on an 18v system. My electrical is all 12v with stock alt. on 8 Power master D925s. even with a full volume demo over 2 minutes long, voltage stays at 12,5v. rock music sounds good too. The XXV Goliaths are the same thing, just half of the Maxximus.