Recent content by Dan_M

Here are some T/S params of my Dayton driver: 500 watts RMS/700 watts max *Le: 3.17 mH *Impedance: 4 ohms *Re: 3.07 ohms *Fs: 22.2 Hz *SPL: 88.6 dB 2.83V/1m *Vas: 2.61 cu. ft. *Qms: 6.12 *Qes: .47 *Qts: .44 *Xmax: 18.7 mm *Sd: .0447 m^2 I'm using the PE 250W plate amp. I played with...

I figured a filter with the widest bandwidth possible at 20hz would get me the extension I'd need. I'm not positive how far this would stress the driver as far as excursion goes though. Is there anyway I can check this?

I have recently been reading up on using Linkwitz Transforms to flatten sealed subs. I'm wondering how well a BFD can be used in this way. I know they don't have any filters below 20hz, but can you use the Fine and Bandwidth settings to reach below 20? Also is there anythign I can use to model...

Very nice looking cabinets, they look clean and finished nicely. How are the highs with those drivers? I have never seen this particular design.

I've used the AR flat cable and like it a lot. I ran it under my carpet and behind the baseboard. It goes up the wall to each surround with staples in the center. After I painted the section running up the wall it's almost invisible if you look at it straight on.

Dahlquist! The newer QX series not the older DQ. I got my set for a great price and have been extremely happy with them, even after listening to Paradigm and B&W at the local botique.

After dorking around with LFE levels more I figured out that much of what I was hearing was actually the BFD clipping already. I lowered the line levels and turned up the amp a bit and things cleaned up nicely. Are there any disadvantages in running a lower signal to the BFD? I read that this...

I built my own 142l sub and have a pretty nice room curve dialed in. Ever since adding the BFD I noticed my sub tends to bottom out more than before. I assume this is because I tamed a +12db hump from 50-60hz, so when calibrated with my mains the sub is producing more sub 50hz material than...

I'm still having issues with what I think is my driver hitting it's excursion limit. According to Unibox I should be hitting my 19mm limit at just under 16hz with a full 250W. Coupled with the rumble filter on my amp it seems to me I shouldn't be able to push the driver past this point. Did I...

I changed a few more things on my sub to help protect it from bottoming and finalized my BFD filters. Here is the end result: I tamed the hump at 20hz and changed the rumble filter from 11hz w/o gain, to 18hz with about 1/2db of gain @ 30hz. I added sockets on the back side of the preamp...

You think that house curve is too steep? I was thinking about taking a few db off that 20hz mark.

Well I think I've answered my own question. I backed off the pre gain a few db and turned up the amp volume. This cleaned things up while still giving me the output. Guess I should just let the amp do it's job. I'm very impressed with how much a difference a nicely calibrated/EQd sub sounds...

First of all here are some graphs of my corrections before and after. The sub is a 142.5l vented box tuned to 18hz with a 12" Dayton Titanic MK3 and 250 PE plate amp. Before I added the BFD I had my reciever attentuating the LFE 10db plus taking another 6db off the top of that for a total...

I think I'm beginning to understand. Vd is the volume of air the driver can displace, the product of its xmax and cone surface area. To play low frequencies loud you need to displace more air. From what I've read the Dayton sacrifices some efficiency for displacement over the Shiva. I...

Is it a pretty safe bet that if I'm ok during Darla's tank tapping I'm calibrated at a safe level? So far I havent heard any material that works the sub that hard.