Dual Driver Subs?

bluegti · 28th September 2006, 08:50 PM

First off... I really have no clue how to design my own subwoofer, so what I want to build may not make any sense. I won't be offended if you tell me it doesn't make sense, but I would appreciate a shove in the right direction.

I want to build 2 subwoofers that will act as the woofer/subwoofer for some full-range monitors. I want the subwoofers to act as stands for the monitors so it almost looks like one speaker, even though they would be 2 separate enclosures.

I'm thinking of using two smaller drivers instead of one larger one - For aesthetic reasons (I know, shouldn't matter, but it does) I want the monitor and sub to be the same widths. I would like the frequency response to go from below 40hz to 120hz.

Do you think I could use two 6" or 8" forward facing drivers in a tall thin enclosure with an off-the-shelf subwoofer amp to do this? Any recommended components? Any recommended designs? I haven't found any with dual drivers.

Lothar34 · 28th September 2006, 09:09 PM

You can put them in two separate stacked enclosures. Any particular reason you want to do that?

I would use 8" though if you want to get below 40Hz. What kind of power handling were you looking for? You want one amp to run both?

bluegti · 28th September 2006, 09:27 PM

I don't think I would want to have 2 enclosures stacked... that would make 3 stacked including the monitor. It might be a little unstable.

Each sub would have its own amp. I would have one amp for both drivers. I figured I could run two 16ohm drivers in parallel for a 8ohm load, or two 4 ohm drivers in series for a 8 ohm load - something like that. I've read a little about dual voice coil drivers that give you flexibility for the impedence, but again I know nothing about desiging subs, so I'm making this stuff up.

Lothar34 · 28th September 2006, 09:51 PM

I meant the monitor stacked on the sub, not the two subs stacked. But now I think I'm confused. Did you want one pair of drivers or two pairs of drivers? I was thinking you wanted one sub with one driver per side.

What's your budget and how much power did you want to push to them?

RobWells · 29th September 2006, 12:15 PM

If you want each stand to match the width of the monitors and use a decent sized driver, you can put the sub driver on the side of the stand, rather than the front.

Rob.

bluegti · 29th September 2006, 07:03 PM

A picture's worth 1,000 words. The top box is the monitor, the bottom box is the subwoofer. I want to make two of these. Each sub would have its own amp. I'm think having the drivers face forward would be better since I want the bass to extend up to 120hz or so.

What do you think?

Lothar34 · 29th September 2006, 07:16 PM

Quote:

Originally posted by Lothar34
What's your budget and how much power did you want to push to them?

What's your budget and how much power did you want to push to them?

looneybomber · 29th September 2006, 08:09 PM

I'd go for 8's over 6's or 6.5's. It's better to have too much and turn it down, than not have enough and be unable to turn it up.

That being said, I 2nd the idea of having a side firing woofer. I feel it helps clean up the face of your enclosure. It doesn't look so cluttered.

dscline · 29th September 2006, 09:52 PM

Quote:

Originally posted by bluegti
I'm think having the drivers face forward would be better since I want the bass to extend up to 120hz or so.

What do you think?

At that frequency, it won't make any difference. Playing 120hz test tones and some a/b testing with left/right speakers, you might be to tell which side of the room it's coming from, but simply having the driver rotated 90° isn't going to make any noticeable difference in real world use.

RobWells · 29th September 2006, 10:27 PM

Don't look bad for an 8:

http://www.partsexpress.com/pe/showd...number=295-545

Rob.

28th September 2006, 08:50 PM	#1
bluegti diyAudio Member Join Date: Nov 2004 Location: Northern Virginia	Dual Driver Subs? First off... I really have no clue how to design my own subwoofer, so what I want to build may not make any sense. I won't be offended if you tell me it doesn't make sense, but I would appreciate a shove in the right direction. I want to build 2 subwoofers that will act as the woofer/subwoofer for some full-range monitors. I want the subwoofers to act as stands for the monitors so it almost looks like one speaker, even though they would be 2 separate enclosures. I'm thinking of using two smaller drivers instead of one larger one - For aesthetic reasons (I know, shouldn't matter, but it does) I want the monitor and sub to be the same widths. I would like the frequency response to go from below 40hz to 120hz. Do you think I could use two 6" or 8" forward facing drivers in a tall thin enclosure with an off-the-shelf subwoofer amp to do this? Any recommended components? Any recommended designs? I haven't found any with dual drivers.

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28th September 2006, 09:09 PM	#2
Lothar34 diyAudio Member Join Date: Sep 2006	You can put them in two separate stacked enclosures. Any particular reason you want to do that? I would use 8" though if you want to get below 40Hz. What kind of power handling were you looking for? You want one amp to run both?

28th September 2006, 09:27 PM	#3
bluegti diyAudio Member Join Date: Nov 2004 Location: Northern Virginia	I don't think I would want to have 2 enclosures stacked... that would make 3 stacked including the monitor. It might be a little unstable. Each sub would have its own amp. I would have one amp for both drivers. I figured I could run two 16ohm drivers in parallel for a 8ohm load, or two 4 ohm drivers in series for a 8 ohm load - something like that. I've read a little about dual voice coil drivers that give you flexibility for the impedence, but again I know nothing about desiging subs, so I'm making this stuff up.

28th September 2006, 09:51 PM	#4
Lothar34 diyAudio Member Join Date: Sep 2006	I meant the monitor stacked on the sub, not the two subs stacked. But now I think I'm confused. Did you want one pair of drivers or two pairs of drivers? I was thinking you wanted one sub with one driver per side. What's your budget and how much power did you want to push to them?

29th September 2006, 12:15 PM	#5
RobWells diyAudio Member Join Date: Aug 2002 Location: UK	If you want each stand to match the width of the monitors and use a decent sized driver, you can put the sub driver on the side of the stand, rather than the front. Rob.

29th September 2006, 08:09 PM	#8
looneybomber diyAudio Member Join Date: Sep 2006	I'd go for 8's over 6's or 6.5's. It's better to have too much and turn it down, than not have enough and be unable to turn it up. That being said, I 2nd the idea of having a side firing woofer. I feel it helps clean up the face of your enclosure. It doesn't look so cluttered.

29th September 2006, 10:27 PM	#10
RobWells diyAudio Member Join Date: Aug 2002 Location: UK	Don't look bad for an 8: http://www.partsexpress.com/pe/showd...number=295-545 Rob.

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