Is there interest in a large three way "monkey coffin" collaboration?

[JasonP]

Re: Is there interest in a large three way "monkey coffin" collaboration?

These showed up in the classifieds so I looked at them on the PE site, http://www.parts-express.com/peerles...ofer--264-1110 I didn't model in unibox yet, but I bet they would do good in a 3-4 cubic foot enclosure vented, given that is what you are going for.

[isaeagle4031]

Re: Is there interest in a large three way "monkey coffin" collaboration?

4 ohm shouldn't really be a problem should it? With imp rise and xover additives, the 4 ohm will be minimal and any about any amp should be fine. It will also make the woofer crossover less expensive.

[Sidi]

Re: Is there interest in a large three way "monkey coffin" collaboration?

8 ohm is preferable for most people. We can look beyond PE offerings too.

[lorenmjones]

Re: Is there interest in a large three way "monkey coffin" collaboration?

The DCS 305 does fine in 3.5 CF which will easily be available in the intended box I think. The DS likes a very small box vented it looks like based on PE calcareous. I don't have WBCD in front of me. The main problem with DCS305 is the 4 ohm impedance. I do agree the peerless needs too much box size for this project. The other suggestions don't dig quite as deep as the DCS though. Is the consensus that a 4 ohm woofer is a dealbreaker?

The obvious choice for woofer would be either the Dayton ST or Dayton DS. The Classics and Peerless just require too much volume. Would prefer to see the DS because not a lot has been done with these yet.

[isaeagle4031]

Re: Is there interest in a large three way "monkey coffin" collaboration?

The DC300 looks pretty darn good. In 75.6L with a 3"d x 4.5"l port, we get a tuning of 32.6 and f3/6/10 of 35.7/30.8/26.1. SPL is coming in at [email protected]/1m. Not a whole lot of power handling before xmax is reached, but a contender none the less.

The DS315 looks good as well. In the same enclosure, f3/6/10 is 32.3/28.9/25.4 SPL is 88.4 Xmax is exceeded with about 150w of input.

I like the STs but the price is a bit of deal killer IMO. In trying to keep with a $400 budget, half that would go to the woofs. Not a good choice IMO.

[ngjockey]

Re: Is there interest in a large three way "monkey coffin" collaboration?

The obvious choice for woofer would be either the Dayton ST or Dayton DS. The Classics and Peerless just require too much volume. Would prefer to see the DS because not a lot has been done with these yet.

[rpb]

Re: Is there interest in a large three way "monkey coffin" collaboration?

I think the woofer should be 8 ohm.

[craigk]

Re: Is there interest in a large three way "monkey coffin" collaboration?

What does everyone think. I was looking at perhaps 15" wide by 42" tall by?? deep.

that sounds fine. I think a project like this should use current drivers. that way if some one would like to build them it would be possible.

[lorenmjones]

Re: Is there interest in a large three way "monkey coffin" collaboration?

Others smarter than I should comment, but to me that driver has too high a Qts at .79 and a slightly too high FS. If it had that Q but an Fs of 22 or something it might be a great choice for a sealed box. Sensitivity is average compared to the DCS305 (about equal). Mostly though I think it makes sense to use drivers that will be around for awhile if the goal is to have this be something people can build.

I just noticed the Community buyouts. They have a 15 inch subwoofer that has decent sensitivities and might dig low. No idea if they are any good though.

[lorenmjones]

Re: Is there interest in a large three way "monkey coffin" collaboration?

What does everyone think. I was looking at perhaps 15" wide by 42" tall by?? deep.

I would be willing to put a bit of time into this after MWAF. Let's clarify what size of monkey is really wanted. I mean, may as well go full 80s Cerwin Vega 15" style. Bigger is better right??????

[Sidi]

Re: Is there interest in a large three way "monkey coffin" collaboration?

I would be willing to put a bit of time into this after MWAF. Let's clarify what size of monkey is really wanted. I mean, may as well go full 80s Cerwin Vega 15" style. Bigger is better right??????

[NickJ]

Re: Is there interest in a large three way "monkey coffin" collaboration?

I just noticed the Community buyouts. They have a 15 inch subwoofer that has decent sensitivities and might dig low. No idea if they are any good though.

[lorenmjones]

Re: Is there interest in a large three way "monkey coffin" collaboration?

Interesting point. What does everyone think?

Thanks Kim for crossover sim help.

The room and speaker location play a large roll in bass response. If the design has sufficient sensitivity from the mid(s) and tweeter, perhaps the design could be used with various woofers and BSC. One of the 3-ways I made for a center had the woofer close to the floor. My mid, which had the same 90 dB sensitivity was not loud enough to get the tonal balance right. So, I think we might potentially need about 6 dB more output from the mids, and tweeter, than the woofer has at 100 hz. Then we make adjustable padding to bring them down as needed. The best way to know how much is to adjust by ear.

[lorenmjones]

Re: Is there interest in a large three way "monkey coffin" collaboration?

So with a 14" to 16" baffle width the F3 of baffle loss would be in the lower 300's right. That would work ok with a single mid of similar sensitivity to the woofer?

I had in mind DCS305, a pair of SB13 mids and a Vifa BC25 or Dayton ND25. Dayton RS150P might be nice too. Or a Faital Pro 6FE200 for the mid. That woofer will reach 20's vented in 3 to 4 CF and is affordable. Any thoughts?

Depending on the woofer crossover point and baffle width, there will probably be very little need for BSC. A 12 or maybe 15, will have enough output that baffle step becomes a non issue. The series 2 as well as a couple of drivers at mcm. The price point won't be easy, but I still think is done doable.

[lorenmjones]

Re: Is there interest in a large three way "monkey coffin" collaboration?

If I had the technical skills I would do it myself. But I know I'm lacking in that. I think $400 in parts is enough to stay out of goldwood woofers, piezo tweeters and sealed back mids but not so much to dissuade many folks interested in a design like this.

I don't have the technical expertise to help guide this build in any way or fashion, but I will be following it closely. I'm a fan of large woofers instead of sat/subs, and have been focusing most of my building in that area. I don't listen to home theater at all, so music is my only focus, but it just seems to me that the best music reproduction is produced by large woofs, while HT is best served by the sat/sub formula simply because of space considerations.

Anyway, thanks for starting this thread. I hope there are lots and lots of big woof fans left out there. And the $400 target cost is a big plus, as I believe that is probably the range that most builders of these systems shoot for.

GeeDeeEmm