My first Dipole Subwoofer!!!

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#302
slowmotion said:
Hi all

IMHO it's better to use a separate sub if your baffles don't go low enough.

cheers 😉
Click to expand...

I'm going for this setup. The dipoles are finished and I'm very impressed by the sound. The drivers are Eminence Delta 15LF.
A pair of JBL SUB1500 are going to take care of the deepest bass.


Frode
 

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#303
Hi johninCR, all

They're TAD 1601s,
so need eq to go low on open baffles.
More suited to vented boxes, really,
but sound much better to my ears on baffles.
I have tried different woofers,
but they all have the same problem,
when you eq them to go low on open baffles
the distortion go sky high 😉
So some sort of sub below 50Hz is much better IMHO.

YMMV, and all that 😀

cheers 😉
 
#305
After reading so much positive about OB bass, I just had to try it. It's nice that cheap drivers can be used with good results, the 4 Deltas cost me approx. the same as one of the 2226H I used before. Besides, the high Qts reduces the need for a big baffle. I'm looking forward to experiment with subwoofers in my setup.

Frode
 
#306
18" Warrior

Has someone had some experience withe the 18" Warrior mentioned in this thread? Seems a very good deal and dipole friendly and they go up to where I need (250hz).

I would also like to know if 1 per side of this 18"-er in a medium sized H-frame can NICELY fill up a 25mt² room down to 30-35 (don`t really think I need to go lower)
Seb
 
#307
Another : http://www.hoejttalerbutikken.dk/product.asp?product=49


Beskrivelse:
RMS: 2 * 250 watt
Music: 2 * 400 watt
Frekvensområde: 18 - 1.500 Hz
Impedans: 2 * 4 Ohm
Følsomhed: 97 dB
Fo: 21 Hz
Qts: 0,44
Vas: 391,1
Total ydre diameter: 385 mm
Indbygningsdiameter: 355 mm


An externally hosted image should be here but it was not working when we last tested it.




http://hoejttalerbutikken.dk/product.asp?product=50&page=2

15" bas fra Ravemaster
Beskrivelse:
RMS: 250 watt
Music: 750 watt
Frekvensområde: 20 - 2.000 Hz
Impedans: 4 Ohm
Følsomhed: 96 dB
Fo: 24 Hz
Vas: 415,1
Qts: 0,49
Total ydre diameter: 385 mm
Indbygningsdiameter: 355 mm

An externally hosted image should be here but it was not working when we last tested it.
 
#308
I think my JBL 2235 15"ers and my Stage Accompany 1203's 12" ers will both work. What do some of you think? I have 4 of each. I don't want to screw up here. How much quicker and more transparent are OB's than say a corner horn. Has anyone tried using a digital processer like a Deqx from Austrailia found at E-Speakers. It's an EQ, Time alighn, Phase corecter, Room equalizer and X-over. It sounds like it would take care of most every problem that can arise.
 
#309
ronco said:
I think my JBL 2235 15"ers and my Stage Accompany 1203's 12" ers will both work. What do some of you think? I have 4 of each. I don't want to screw up here. How much quicker and more transparent are OB's than say a corner horn. Has anyone tried using a digital processer like a Deqx from Austrailia found at E-Speakers. It's an EQ, Time alighn, Phase corecter, Room equalizer and X-over. It sounds like it would take care of most every problem that can arise.
Click to expand...

link pleas !
 
#310
problem solved

RMS: 2 * 250 watt (2x4ohm)
Music: 2 * 400 watt
Frekvensområde: 18 - 1.500 Hz
Impedans: 2 * 4 Ohm
Følsomhed: 97 dB
Fo: 21 Hz
Qts: 0,44
Vas: 391,1
Total ydre diameter: 385 mm
Indbygningsdiameter: 355 mm

I then use only 1x4ohm and get 2xqts = 0,88

qts 0,88
Fs 21 hz
vas 391,1
i´m i rigth ?

http://www.hoejttalerbutikken.dk/product.asp?product=49
An externally hosted image should be here but it was not working when we last tested it.
 
#311
Wingman,

You raised a good point that I'm surprized hasn't been discussed before and that is the advantage of using dual voice coil drivers.

I believe it is shorting the second voice coil that in turn doubles the Qes and which raises the Qts accordingly. Adire Audio recommends a 250ohm variable potentiameter for putting accross the terminals of the unused coil to make the Qes widely adjustable.
 
#317
Grandma´s_SUB said:
I have cheap woofer:
qts 1.36
qes 1.75
qms 6.17
Fs 32.2hz

Can anyone design me recommened box(for 1 woofer should be I baffle?)
-I worked with dipole .xls, but it has some xy data(Fpeak...)

Dean
Click to expand...

Put some books or something under the magnet to prop it up and use a cardboard baffle and give it a listen. Try flat, folded, H baffle and see what you like best. A few minutes, some cardboard duct tape is all you need. Forget about being scientific and trust your ears, this is dipole, not a box.
 
#320
Grandma´s_SUB said:
cardboard an books?
Is this a joke?
Click to expand...

Dean,
It's not a joke. It's not something I'd encourage for a permanent baffle because it's not very stable. For something to experiment with in determining baffle shape and size, it's perfect. Cheap, flexible, easy to cut, and changes can be made in seconds. For small light weight drivers, forget the books and just tape them in.
 
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