SPL box for dmx 15

[loud by design]

Don't feel bad. I've worked everyday this week (no day off) and last week I was out sick (kidney stones) for 3 days. NOw Ive got to get to work on the van again. So much work.....so little time.

I feel your pain I've had 9 kidney stones.

[xmax-1]

I missed on the ports and the x-over on the amp. The port calcuator said the box is tuned to 20hz, so I need to cut the ports down 5" each to get it tuned at 44hz.What's the break-in for the sub and can it take two D5000.1s.Also my series/parallel wiring came to 1.4ohm before I put the sub in the box.

1.4ohms sounds right (.5ohm per pair of coils). Will the sub take a pair of the amps......YES. for burps it'll be fine. Watch the volume for long term music listening though. Break-in period is 8hrs. I gave my 15's roughly 4hrs at moderate volume before "getting into them".They are definately louder now than they were when brand new.

Just for sh!ts and giggles, add another set of aero ports and keep the length the same. That will increase the port area to (roughly) 50in^2 and tune to the high 30-low 40Hz area. This will equal higher output (spl) with a good frequency. Give it  a try!

What you're after is a high effeciency enclosure (high volume "SPL" with minimal power). Then add your second amplifier.

[admin]

Hello,
The breaking in period i would recommend for the DMX is around 6 to 8 hours, out of the box with low volume low frequency being played threw it. If you have a frequency CD that's perfect. You really don't want to hear anything just have that cone moving up and down. If you have 1-DMX15 I wouldn't put anymore than 1,200 watts RMS for any music play so 1-D5000.1 would be perfect. But for straight SPL competition 2-D5000.1 strapped together would give you 5000 Watts RMS at 2OHM which could be used for straight SPL 30 second burbs.

[loud by design]

Hello,
The breaking in period i would recommend for the DMX is around 6 to 8 hours, out of the box with low volume low frequency being played threw it. If you have a frequency CD that's perfect. You really don't want to hear anything just have that cone moving up and down. If you have 1-DMX15 I wouldn't put anymore than 1,200 watts RMS for any music play so 1-D5000.1 would be perfect. But for straight SPL competition 2-D5000.1 strapped together would give you 5000 Watts RMS at 2OHM which could be used for straight SPL 30 second burbs.

OK sounds good and yes the set-up is for 100% competition.If I use a 4.73cuft box what would the port be. And also the my sub is a 1.3ohm x 4? I checked it with two meters and both say 1.3.

[admin]

1.3 Ohm sounds about right. I will get al this info to the box guy and have him plug everything in and post it ASAP. You want to tune it at 44Hz Right? Talk with you soon.

[xmax-1]

As far as area goes.......I'd say 56.76in^2.

I'd personally go with 76in^2 area with 16" depth.

That should tune to around 40Hz witha peak of around 45Hz (depending on vehicle transfer function).

[loud by design]

Hi guys will the D5000.1 be ok at  1/2 ohm? I know it loves 0.70 and never gets a little hot, but I want to check before I do it. I have two red tops and one is only one foot of wire from the battery.

[admin]

Hi guys will the D5000.1 be ok at  1/2 ohm? I know it loves 0.70 and never gets a little hot, but I want to check before I do it. I have two red tops and one is only one foot of wire from the battery.

You have to keep the D5000 at 1 ohm or higher. The DB8000 however is 0.5 ohm stable so maybe that a beter choice if you have to run at 0.5 ohm. Thank you~

[loud by design]

Time to sale one D5000.1 and move up to the DB8000.

[loud by design]

As far as area goes.......I'd say 56.76in^2.

I'd personally go with 76in^2 area with 16" depth.

That should tune to around 40Hz witha peak of around 45Hz (depending on vehicle transfer function).

O.K. I'm going with this port....let you know in a day or two how it went.

[loud by design]

Worked on the new box today 4.73 before port and DMX 3.9 after. The new port is 58sq" tuned at 38hz. Still have to brace before a can play.

[loud by design]

I think I'm going to open the port up to 76^2", it's sounds loud now but not 145 yet. I need the car to do 145's and up. I my get to meter later in the week. Thanks for the help.

[loud by design]

Still working on the DMX the new box (3.88 cuft with 78^2 ). That box is great at 46hz but suck on music. Now going with a 3.0cuft with 40in^2.Pictures to come soon.

[rushnrun]

You get the new box built???

[loud by design]

You get the new box built???

Did one that is 2.88 cuft net with 58^in port it is a lot louder. I still would like you to work some numbers for me. And the box is 2.88+58sq in port tuned to 46hz.