USB bin

Very nice looking box . Is it a twin 18.

yea reverse firing double 18" celestion ftr 4080FD loaded. Good drivers, work really well in this cab. They say that they take 1000w aes per driver! i personally doubt the xmax could handle this.

right, so I don't have the equipment to do a smaart test etc, but i did a simple easy and dirty test using a signal generator, multimeter and sinwave generator!

obviously this isn't ideal, but i did a lab sub and two hd15's under the same conditions to gain some kind of comparison. all have a notch at 70hz and 125hz which could be the db meter. All were standing up with the db meter 1m away, 60cm off the floor

i kept the input voltage reading on the multimeter constant  at 2v for the usb, 1.9v for the lab and 1.41v for the hd's (4ohm pd158 loaded in parallel)

red is lab, blue is usb and green is hd's

as you can see, all the db values seem very low, but i'm not sure if my multimeter is showing pk, pk-pk or rms. gives some idea anyway.

will try and find someone with smaart but sounds loud and good to my ears and i guess thats the most important thing

Edited by davey t - 21 March 2006 at 5:09pm

they look a bit like the funktion one f-218 bins

not sure really. I think the plan at the moment is to get them cadded asap and find someone to cnc the wood for 24 or so. Then sell them in flat packs complete with drivers, trimite etc. Doing it this way in bulk makes things much cheaper for everyone (and quicker to put together), we could probably do the pack for about £400. May find a joiner who wants to put them together but i certainly dont have time for it.

Anyone interested?

 

Its also interesting that my hornresp model predicted a big peak in the response at 115hz which doesn't seem to be there (my ears comfirm this with sin wave sweeps etc). Thats good tho. it did predict the next bump at just over 200hz, which is there. All in all the response sounds very smooth, with just a little -3db attenuation on +100hz they sound very good crossed 40-160hz.

Don't forget that it will be a fair bit specialized (2-way bass) but these designs inevitably kick like a donkey and don't have to be crossed as low as converntional folded units.