sundownz

1.75 total is plenty.

Looks good

Just for fun we made a video with the mic 6 feet outside the car... still does high 120s at the peak note

It is a v.1 model -- the only v.2 is in my Jeep.

Hope that puts to rest whether or not the Nightshade will play low.

We plugged up one port hole in a box I had laying around the shop and dropped an NS 15 in there to see what would happen. Good times I think we've had too much fun this weekend. Also did a video of a 149.5 run -- my clamp did not register in the video for some reason... but when we did the 149.7 run I clamped 2500 actual watts. VIDEO :

Sounds really good / loud on music in that box.

Yes. [email protected]

1.5 cubes tuned to 35 Hz would slam for a pair... a single 4" Aero-Port will be fine daily @ 15.5" length (you can just use full length and be close enough).

We rotated the box a bit and got it up some : I don't think this huge 30" long port is really optimal... but we just modified one of the other boxes to give it a shot.

MECA Style metering results so far (this is done at the passenger head rest with driver door open): We had a 143.2 but I didn't get a picture. Going to try some other frequencies later... that was the peak on the dash (37 Hz)... we haven't tried others yet.

They are rated 400 RMS.

My mic is distorting on the camera -- it's just a hand-held digital camera on video mode.

Box is 0.75 cubes -- power is not clamped... Sean still has the 3500 in there from the high SPL testing but we are obviously not using that much power

Low tuned SA-8 on music : We didn't have anyone with long hair around... so we used paper.

I made a shirt just for me back in 2006 with amp guts on it. Derrick has a new machine that may be able to do that for me on the way.

Yep, it's an SA-12

I'm not getting any more power on the 18v system as protect is kicking in due to the really low final impedance -- sub is still pretty composed at the 10,000 watts I'm seeing. The pair of amps is capable of closer to 18kw but not with such a low rise. Before I say "I can't get any more from this sub and/or box" I want to actually put more power on it and see. Every time I've though I had all I could get from this box in the past I found a way to gain

I don't have any more or I would.

I may also just throw four 3500s in there at 0.5 each -- that could do it

UPDATE: I have moved to 16v but still around the same score... figuring out why. My impedance rise is insanely low with the D1 coils and the amps at 0.25 each... I may need to use D2 coils *laughs* 0.25 actual DCR per amplifier with a rise to 0.8 per amplifier -- little on the low side! When I kick it one more click past the 155.9 - 156.0 level the amps get protect happy. I need to re-build with a D2 which would give me 0.45 per amp actual DCR and should net 1.44 per amplifier... which based on earlier testing can still give me around 14,000 watts from the pair of 4500s on 18v.

That can easily vary 10 dB by enclosure, vehicle, etc... hard to say, honestly.