Recent content by J216

Thanks for the help. I think I kind of get it now. Mach .15 is roughly 165 ft/s. So, slower than that should be good. I suppose, probably a lot less, if the port is facing you. As with my home theater sub But, I gotta bug you about this one more time. Where do you find the "vent mach" in...

Sorry. I didn't realize that was so vague until I read it again. I think I'm looking for a threshold. Here's an example of one that I was playing around with for a home theater sub. I built the box at 2.5 net cubic feet, tuned to 24.5hz. the port is only 2.625"D x 7.75"L. As I expected I...

When designing a ported enclosure, is there an acceptable range for the air velocity?

OK, I already have 2 8 ohm subs wired in parallel. I want to add another 8 ohm sub in parallel. Unfortunately, I can only find the 4 ohm version of the sub that I'm looking for. Is it OK to mix the impedance? Or, Is this a recipe for disaster? If they are all wired in parallel, Will it end up...

What vehicle is this going in? Center console?

Not bad for a first try. I'm a little off on the net vol. according to the specs it's 0.10 for the pair. (JL 10w0) I must have rounded something wrong. But, 0.040 shouldn't make that big of a difference, Right? Thanks for the input.

This is my first ported design. It should be 2.75 cu. ft. at 32 hz. If I did the math right. I used the sticky posted here and winisd to come up with the port length. The port is 2.5"x12.5"x27.25" The outside dimensions are 30"x14"x18.5" These are pretty much the max dimensions I have to...

Thanks. I really appreciate the help. The only dimensions I'm really worried about are the width and the height. Max W= 30". I might be able to squeeze 31". I just don't want to lose the spare tire. Max H= 16" to 17" would be best.

I have 2 JL 10w0-8s in a sealed box at the moment. I've been thinking about trying to build a ported one. I have a ton of questions. Mostly about the volume and tuning frequency. I'm thinking 2.5 to 3 cu.ft. @ 30 to 34 hz. I really don't know what to consider when choosing. For the most part...

That's what I thought at first. But, It's all over the place. Even in the manual for the Z1000 I just bought. I noticed an asterisk by one of the other amps(Z7000) that said that the 4 ohm rating was 50watts but the USAC rating was 300. It makes sense when i think about it. Call it 50 watts,end...

Yeah The 4 ohm rating was what i was talking about. The competition thing makes sense. Kind of what I figured. Yup, I'm an idiot. LOL.

I'm just curious. I was looking at the cadence site after reading a thread. Some of the amps have some odd numbers attached to them. Like this one... http://www.cadencestore.com/ProductCart/pc/viewPrd.asp?idcategory=97&idproduct=243 I guess I'm just wondering why?

Thanks. looks like I can use it for my dash speakers, temporarily. Thanks for the link too. I'll have to go check it out.

Honestly, I'd go with the JL. But, I'm biased. "Brand loyal" I guess.

I found an old alpine amp in my attic. It's a "3523". Does anyone know any of the specs? I can't seem to find any info. The **** thing's just too old.