Inexpensive 15" woofers - which one?

[jakeb]

http://www.mcmelectronics.com/product/55-2983

$91 - cast frame, 4.5 cuft Vas, but 43 Fs, 7mm xmax

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=295-034

$90 - stamped frame, 9 cuft Vas, 28Hz, 5mm xmax

http://www.mcmelectronics.com/product/55-2953
$26 (on sale, cheap!) - stamped frame, 8.2 Vas, 37Hz, only 3.75 xmas


Planning on using 2 per side, in a large 3 way for home theater.

Any other recommendations?

Would like to keep it on the cheaper side, unless a great value.

btw: don't need a "subwoofer", have one for true 20hz and below sonics

Thanks

[kendomusic]

http://www.mcmelectronics.com/product/55-2983

$91 - cast frame, 4.5 cuft Vas, but 43 Fs, 7mm xmax

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=295-034

$90 - stamped frame, 9 cuft Vas, 28Hz, 5mm xmax

http://www.mcmelectronics.com/product/55-2953
$26 (on sale, cheap!) - stamped frame, 8.2 Vas, 37Hz, only 3.75 xmas


Planning on using 2 per side, in a large 3 way for home theater.

Any other recommendations?

Would like to keep it on the cheaper side, unless a great value.

btw: don't need a "subwoofer", have one for true 20hz and below sonics

Thanks

I like the MCM driver with the cast frame and nicer FR than the Dayton. Just my 2 cents. I'll probably buy them for my eWave.

[Sydney]

The cast frame model also has a larger VC and greater excursion.

So... There would be a total of 4 15's AND you have a subwoofer for the bottom octave?
Questions come to mine: What sort of subwoofer(s) do you have that would keep up with 4 MI 15's. ( wow! )
( I ONLY have 2 15's for the entire bottom 2 octaves and that enough for me )

[jakeb]

Bill Fitzmaurice's THT, a horn loaded home theater sub with 2 12" Dayton DVC's that have an Fs around 20hz. The 4 15's will have Fs's around 35-40hz and be in much smaller boxes. The THT is powered by an EP2500 with 600 rms PER sub.

The 25 buck 15's are tempting for the price....

[billfitzmaurice]

Bill Fitzmaurice's THT, a horn loaded home theater sub with 2 12" Dayton DVC's that have an Fs around 20hz. The 4 15's will have Fs's around 35-40hz and be in much smaller boxes.
Using 15s with a THT is a waste. THT is perfectly happy to at least 80Hz. Tens and twelves are quite adequate to handle above that. As to which ten or twelve: the one that models best in your cab design.

[jakeb]

Bill....

The 15's are running to over 800 hz in a 3 way.... the 15's have little to do with the 80hz and below.

It's the overal efficiency that is the goal.... I need over 100 db at 4 ohm and plenty of power handling.

Plus overall impact.... it's not a subwoofer I'm building

http://www.qsc.com/products/speakers/dcs/dcs_sc2150.htm

This is essentially what I'm building.

[jakeb]

Correct that....about 500hz

[AMC]

Bill....

The 15's are running to over 800 hz in a 3 way.... the 15's have little to do with the 80hz and below.

It's the overal efficiency that is the goal.... I need over 100 db at 4 ohm and plenty of power handling.

Plus overall impact.... it's not a subwoofer I'm building


This is essentially what I'm building.

I think the point is, if your not dropping below the 80HZ range, there is just no need for 15's, a good quality 10 or 12 will do the job and provide better upper range response, go in a smaller cab, and just in general end up with a better product. The setup you are trying to emulate is designed to be more of an all in 1 design, without the need for separate subs.

Keeping in your general price range, the Delta 10A or Delta 12A would both offer the same efficiency and, at least in theory, a better midrange. In fact, go with the 10's, and you would most likely just need a 2 way.

[billfitzmaurice]

Bill....

The 15's are running to over 800 hz in a 3 way.... the 15's have little to do with the 80hz and below.
The only valid reason to use fifteens is when you're running without subs and need the low frequency output they're capable of. The only reason for a cab as large as that of your example is if you're actually running it to 40 Hz. With an 80hz crossover to subs it's at least twice the size necessary. And if you're using a horn loaded sub, and propose using horn loaded mids and highs, why would you not use a horn loaded midbass?

[AMC]

... and propose using horn loaded mids and highs, why would you not use a horn loaded midbass?

Got plans for some kick bins coming soon Bill?

[jakeb]

I undertand the concerns and suggestions.

I really should say the 15's will run to 40hz as the overall impact and normalization and lesssing of room nodes will generally be helped by mutlitple "subs", correct me if I'm wrong.

BTW: there is no guarantee the THT will be used with the system either.

I wasn't planning on eliminating the 40-80hz...just that it wasn't going to be totally without a subwoofer.

Looking at the DR250 on bill's site, it drops off like a rock at 80hz, which I don't desire....it also looks like a swing of 7.5 db or more in the 200-500 range, which I'd like more linear.

I'd like the option of it to be more "full range", to be flexible in the future....

Back to the topic.

Assuming I want 15's....which ones.

[AMC]

$26 pro sound drivers frighten me. most likely just a waste of money.

[jont]

http://www.mcmelectronics.com/product/55-2983

http://www.mcmelectronics.com/product/55-2953
$26 (on sale, cheap!) - stamped frame, 8.2 Vas, 37Hz, only 3.75 xmas



Thanks

That driver is now $38, Is the sale over.

[jakeb]

http://www.mcmelectronics.com/product/55-2963

This is a much better woofer....diecast frame...only $38 bucks..

IF you look at spec sheet (and not the typed blurb) it has 7.5 mm Xmax!

Use source code WA104 if you don't see the sales.

Jake

[philiparcario]

I like http://www.mcmelectronics.com/product/55-2963 nice qts of .4 or so. lets you have sealed boxes.

a 3.5 foot cube sealed for one woofer gives you an f3 of 57 and a qtc of .8 run them from 50 hz and up. they will be fine

[billfitzmaurice]

Got plans for some kick bins coming soon Bill?Not ever. Kick bins are a quaint relic of the 20th century. They didn't make a lot of sense then, they make even less today.

[kendomusic]

http://www.mcmelectronics.com/product/55-2963

This is a much better woofer....diecast frame...only $38 bucks..

IF you look at spec sheet (and not the typed blurb) it has 7.5 mm Xmax!

Use source code WA104 if you don't see the sales.

Jake

Is there a misprint on the XMAX? The page says 3.75 mm but the Specsheet says 7.5 mm.

[AMC]

Is there a misprint on the XMAX? The page says 3.75 mm but the Specsheet says 7.5 mm.

It is possible that one refers to the mechanical limit, and the other the actual x-max.

To the OP, I think you are putting to much emphasis on the Fs, anything in the 40 - 50 range should be fine. I also think you should sit down and figure out just exactly what you want to do with this. you have said "the 15's have little to do with the 80hz and below." "the 15's will run to 40hz" and "there is no guarantee the THT will be used with the system either." It all gets a little confusing.

[AMC]

Not ever. Kick bins are a quaint relic of the 20th century. They didn't make a lot of sense then, they make even less today.

I know, I just like to poke you sometimes;)

But you should hear my Scoop!

[kendomusic]

http://www.mcmelectronics.com/product/55-2983

$91 - cast frame, 4.5 cuft Vas, but 43 Fs, 7mm xmax

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=295-034

$90 - stamped frame, 9 cuft Vas, 28Hz, 5mm xmax

http://www.mcmelectronics.com/product/55-2953
$26 (on sale, cheap!) - stamped frame, 8.2 Vas, 37Hz, only 3.75 xmas


Planning on using 2 per side, in a large 3 way for home theater.

Any other recommendations?

Would like to keep it on the cheaper side, unless a great value.

btw: don't need a "subwoofer", have one for true 20hz and below sonics

Thanks

Here's a 12" alternative may perform better than the 15 inch plus its cheaper.


http://www.mcmelectronics.com/product/MCM-AUDIO-SELECT-55-2982-/55-2982

[jont]

[

Use source code WA104 if you don't see the sales.

Jake[/QUOTE]

Thanks, that is just what my "boom-bicycle" needed. At $25 each I can justify getting a pair for my sure amp!

They are probably only 94db/w but will add some bump to the two 10" speakers on it now. https://picasaweb.google.com/joncthomas/Desktop02?authkey=Gv1sRgCJX8r93kmt6aDw

[jakeb]

Good find on the 12" woofer. I didn't see it.

The 12" is the more ($42) than the 15" ($38 on sale), more expensive for the same performance (other than a smaller Vas and higher power handling).

The 12" has a much crazier freq response. Look at the scale...it is 20db and is still wiggly!! The 15" is on a 10db scale is and very linear....who knows if its accurate, but I'll take the linear one....if the money is the same.

Also. A 15" can move more air (obviously) and will have more impact than the 12" 'ers, which is my goal...the bottom of a 3-way...500hz and down.

Otherwise, if I did need a 12", this is a great find....the correllary 15" on mcm's website is $90! more than 50% more than the 12"...not sure why mcm did this....

http://www.mcmelectronics.com/product/MCM-AUDIO-SELECT-55-2983-/55-2983

[Sydney]

A 15" can move more air (obviously) Unclear on the plan...Is the general plan still to replicate the aforementioned QSC system with a BF THT?
I can appreciate that rationale against attempting to integrate the THT with a design like the QSC.