This is continued from my other thread BTW 
2 12inch Peerless XLS's, in a 2cf vented box tuned to ~35hz (closer to 40hz likely) with a 3inch wide, 13.5inch tall, 26inch long slot port, powered by a momentum MA900 (450x2 @ 2ohms, peak watts. Closer to 200watts RMS per channel @ 2ohms).
Little site with pics of the project
Better pic of the open-air voice coil
Pic of the installed amp
Box finished with subs installed, only missing carpet
So after we put the box in, we drove around first and we went by the school (today all the grade 11's, 12's and OAC's had 2 days off(long story)), and parked in the student parking lot so we could measure the subs. It was on the way to my place anyhow so what the heck.
So we're sitting the parking lot pumping "Dirty - Hit the floe" (good bass song), and we pop the trunk (and I took the above pic), and we're just watching the woofers play. Then we put on "KRS-One - Step into a world", and damm it was nice. I put my Radio 5h!t...err...shack... SPL meter on the trunk floor a few inches from the subs and it just starts bumping right down to the lower side of the trunk (school parking lot isn't very level, it's a school after all), meanwhile being set on the highest 120db scale, the needles just wavering at a bit over 126db (it doesn't wanna register anymore, dunno why).
We were only there for *maybe* 4 minutes when a teacher from one of our 30 portables steps outside to look see where the bass is coming from.....that was at least 75 feet away.
We figured he might call the principle or something, and my friend knew the teach, so we split. Leaving a bit of rubber on our way :-D
So we drive back to my place, and he's not playing it very loud, but all of a sudden the bass cuts out. We look at the amps fuses, they're fine. We look at the fuse underneath the fuse, burned out black.
Turns out it was only a 30amp....he bought a 60amp promptly.
Then I had to go home, so that's that.
But damm those thing a LOUD, and hit pretty hard for a high-tuned box, and for a relatively low end amp.
Even sitting in the back seat, there was no problem to get my SPL meter to fly back and forth on the 120db scale.
Needless to say he's really happy with it, and it shouldn't have much trouble in parking lot bumping
Best part: no port noise at all
2 12inch Peerless XLS's, in a 2cf vented box tuned to ~35hz (closer to 40hz likely) with a 3inch wide, 13.5inch tall, 26inch long slot port, powered by a momentum MA900 (450x2 @ 2ohms, peak watts. Closer to 200watts RMS per channel @ 2ohms).
Little site with pics of the project
Better pic of the open-air voice coil
Pic of the installed amp
Box finished with subs installed, only missing carpet
So after we put the box in, we drove around first and we went by the school (today all the grade 11's, 12's and OAC's had 2 days off(long story)), and parked in the student parking lot so we could measure the subs. It was on the way to my place anyhow so what the heck.
So we're sitting the parking lot pumping "Dirty - Hit the floe" (good bass song), and we pop the trunk (and I took the above pic), and we're just watching the woofers play. Then we put on "KRS-One - Step into a world", and damm it was nice. I put my Radio 5h!t...err...shack... SPL meter on the trunk floor a few inches from the subs and it just starts bumping right down to the lower side of the trunk (school parking lot isn't very level, it's a school after all
), meanwhile being set on the highest 120db scale, the needles just wavering at a bit over 126db (it doesn't wanna register anymore, dunno why). We were only there for *maybe* 4 minutes when a teacher from one of our 30 portables steps outside to look see where the bass is coming from.....that was at least 75 feet away.
We figured he might call the principle or something, and my friend knew the teach, so we split. Leaving a bit of rubber on our way :-D
So we drive back to my place, and he's not playing it very loud, but all of a sudden the bass cuts out. We look at the amps fuses, they're fine. We look at the fuse underneath the fuse, burned out black.
Turns out it was only a 30amp....he bought a 60amp promptly.
Then I had to go home, so that's that.
But damm those thing a LOUD, and hit pretty hard for a high-tuned box, and for a relatively low end amp.
Even sitting in the back seat, there was no problem to get my SPL meter to fly back and forth on the 120db scale.
Needless to say he's really happy with it, and it shouldn't have much trouble in parking lot bumping
Best part: no port noise at all
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