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Old 4th December 2008, 02:10 AM   #1
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Default Sub-woofer project

Need some advice, Im a little way forward with this project but Im wondering if I can keep it simple and put a passive filter in after the amp before the drivers?
The amp is a 200w/ch mosfet driven unit with 45v and 12v rails. The drivers are Exodus 10" DPLs and are going into a folded baffle (W)
Im splitting the source output with 1/2 to an Audiosector LM3785 amp Ive got and 1/2 to this amp.
Any thoughts?

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Old 4th December 2008, 02:25 AM   #2
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First off I'll be very interested in your thoughts on this driver and the application when it's finished.
Second, that looks like an awfully small heatsink for 2 X 200 watts, this is a single sub IE not half of a stereo pair>??
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Old 4th December 2008, 02:30 AM   #3
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Third thoughts ;;-> gotta go active between source and amps and as equal power is aprox 300 hertz how efficient are the mids if you have 50 watts for them??
I have looked at those drivers consensus was needed electronic EQ to boost low bass, also not efficient so my thought was 4 in total 2 per side
Qts is a little high for OB use without EQ
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Old 4th December 2008, 05:38 AM   #4
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Ok, the heat sink is not what Im going to use, Ive a very large H/S for it.
Yes it is intended as a single sub.
The mids are very efficient.
I was hoping you werent going to say the ' active' word.
I agree the drivers are very inefficient. They sound very nice if fed heaps of watts.
I have a 250w sub amp and used it while I tried 3 different baffles.
The W sounded best but the amp was working overtime to make any sound at all.
I agree that 4 drivers is optimal but a) I didnt want to commit to 4 until Id heard them play. b) My wife wont have any more speakers in the lounge so Im stymied till I can prove how great they will sound.
WAR rating on speakers is about 2/10 in our house.
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Old 4th December 2008, 06:03 AM   #5
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Better get you significant other on side by asking her opinion of finish and placement quick as for SPL reasons I think you ned to go stereo, you are lucky in one way, 10 inch is usually the biggest that wives and girlfriends will accept easily.
This particular driver got talked about in a previous thread of mine.
general feeling thay 4 was the minimum, but maybe you can hide it in a corner ( yeah isn't that the worst possible place for a W frame>>?? )

Have you evaluated cost of active V passive, I have fiund active to be far cheaper if not better and I find it better/easier ///Go Behringer!\\\
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Old 5th December 2008, 12:15 AM   #6
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Cheers for the help.
Ive looked at active.
There are some Beringers around for good money.
My initial goal was to keep stuff as compact and staight forward as possible.
All that has gone for a sailor now I got the 10" DPLs.
Im seriously considering putting them on ebay and moving on.
That would mean 10" Peerless subs in the floorstanders.
Theres room and they would add enough oomph the satisfy.
I aint a doof doof kind of person it irritates me. However clean clear unobtrusive bass is nice. If the DPLs are driven low that is what they deliver.
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Old 5th December 2008, 12:46 AM   #7
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Ilisten to a lot of cello and double bass ( Yo YO Ma 0 and I love kettle drums and tympaie also organ, and I have all of the "Chill-out " albums not a "Doof-doof bloke " either but I tend to get really lost in the music when the bass can keep up with the rest of the music, 4inch woofers in a boom box just don't do it for me either, but neither does a small hatch with 4 X 15 inch subwoofers,
market is way down, I just sold some small subs i=on E*** and a month ago about $100 today $40
If yu like the bass the 10inch DPL's give keep them and live with them for a while, they are cheap enough lat time I looked $120each thought ???
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Old 5th December 2008, 02:07 AM   #8
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$115 each including postage.
Ive just bought another sword so stock with the missus are WAYYYYY down. If you thought WAR points were low on audio try nihonto.
No chance of getting another audio purchase passed till next year.
Hoping Chrissie presents will add some kudos
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Old 5th December 2008, 02:20 AM   #9
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Default Nihonto??

Similar to Kendo but with sharpened steel blades??
I like swords myself, as decorative art and as weapons; SWMBO does "NOT"
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Old 5th December 2008, 02:24 AM   #10
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OK pardon my ignorance just "Googled"
Katana as a work of art YES, but do you also use them??

I like the real thing cannot abide those cheap mild steel chinese copies, I'm a khukrie man myself but "Not allowed" but she putdup with big speakers so I am happy.
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