zgenius

What is the most amount of wattage you the dd2515 can handle at a sustained level?

Thanks again

Sikk Nation

iTrader: (1)

750Wms. but that also depends on the enclosure as well

zgenius

Please elaborate alittle. I made a box for my dd2515, and I am powering it with my usa150 for a total of 450w rms and what is happening is it sounds ok at lower volumes but it sounds like crap when i turn it up, it doesnt respond to alot of frequencies and alot of the bass notes I can feel but cant hear. I just want to know if this is an amp thing? box thing? or anything else? I expected alittle more from this sub.

thanks again

Sikk Nation

iTrader: (1)

the sub is rated for 750 so that's what it can handle thermally. In a ported box with high tuning, anything below port tuning offers little suspension help for the sub so it can flop around and botom out etc... in a tiny saled box the impedance curve is different and the cone movemet is reduced alot so the subs cololing mechanisms don't work as efficiently...

you feeling but not hearing the notes could be a box location issue

zgenius

The box is right behind the front seats facing up, and as far as i know this box is tuned to 40hrtz as per the dd specs. What would you suggest for more response and better overall sound? box size ? tuning?

Thanks again

Sikk Nation

iTrader: (1)

that's the problem.. put the box as close to the back door as you can and fire it toeards the back door. (well at least 10" from the back door/gate)

zgenius

I cant put the sub in the back because I am a contractor and thats where all my tools go. There are no rear seats at all so what about facing it forward or towards the side doors?

On an other note I think I may have figured out the problem. I am using the crossover from my deck which then goes into my epic150. This is a big no no according to the epic150 manual.

So my plan is to switch from the sub out puts of the deck to the rear outputs (eliminating the deck crossover) than I was thinking to connect my crystal line line driver before the epic150 to boost up the line (my amp gain is almost fully cranked right now) is should give me alittle more too I'm pretty sure. This was the best line driver crytal line made I believe it brought the lines upto 12v or so. Than after the epic 150 I will connect my petras crossover and than to the amp.

What say you? Any objections?


Also I am using 8ga power wire for my speaker wire on the sub but that shouldnt be a problem should it?

Thanks again and I will post results tomorrow

Sikk Nation

iTrader: (1)

I think you have too many components in your signal line. And having the subs in the middle of the vehicle will always pose it's share of problems unless you build a wall.

zgenius

Ladies and Gentleman we have a bingo! So I changed to the rear outputs of the deck (eliminating the deck crossover) added the petras crossover before the amp, faced the box towards the front and straped her down. I went from a crappy sounding 133db to a lot better sounding(I know it can sound better) 144db with regular music off a home made mp3.

It sounds alot better but not perfect, I have alittle engine noise going on and im thinking of adding the crystal line to take care of that and boost up the line alittle. I also have to install my stiffening cap, thinking of adding my mbr70 and a battery or two. And also changing the petras crossover to my audio control 3xs concert series.

Now I know your thinking "mbr70 and batteries? But why? no need". Well its simple I am thinking of getting another 2515 and adding my other usa150 to it hehehe. Old school to the death baby!!!

Needless to say my usa 150s are offically off the market.

Thanks to all for there help and input and I will continue to post any new progress.


Thanks again

Kerri

godzilla1978

Just curious what mic did you use to measure the Db. An 11Db pick up seems like a whole lot gain from just the changes you listed.