I have a pair for Bohlender and Graebener RD75's and am looking for suggestions for woofers to pair with them. I would prefer open baffle but I am open to suggestions.
For open Baffle, the Emminence Alpha 15A is a classic driver that works well, it's more efficient, but for OB you need to have that as they loose a lot of efficiency in that alignment. The Lii Audio W-15 is also getting popular for that, but i never heared it so i can't tell if it's really good. On specs alone it looks good altough
You could be more specific. Like what sound pressure levels you'd like to accomplish and in what frequency range. Also any thoughts on crossover frequency would be nice.
I appreciate very much the responses.
I listen to a lot of Classical music on this system so moderate SPL.
For crossover I would like to take advantage of the great range of the B&G RD75's so <300 Hz, maybe closer to 200 Hz. IT is pretty flat down to 175 Hz.
I listen to a lot of Classical music on this system so moderate SPL.
For crossover I would like to take advantage of the great range of the B&G RD75's so <300 Hz, maybe closer to 200 Hz. IT is pretty flat down to 175 Hz.
What size woofer? Active or passive crossover?
I have used the Visaton W250 10" woofer in sealed boxes. It should work well in an open baffle. The Eminence BP102 10" bass guitar driver is popular, but the Qts might be a little low for open baffle. The BP122 12" driver has a slightly higher Qts.
I have used the Visaton W250 10" woofer in sealed boxes. It should work well in an open baffle. The Eminence BP102 10" bass guitar driver is popular, but the Qts might be a little low for open baffle. The BP122 12" driver has a slightly higher Qts.
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Ok, op to 300Hz about any woofer will do. Check for big volume displacement (Xmax x cone area) and moderate to high Qts for open baffle. Since the B&G has some potential, I'd suggest a decent investment. One or two of these per side would do. High Qts, big Vd and the dual voice coil gives nice options to build a passive crossover for the dipole correction.
Another opinion..
I keep reading about how wonderful the Eminence Alpha 15A is as an OB woofer. Actually, it is a lousy woofer by any standard!! One of the few Eminence products I do not like. The worst aspect is the HUGE 12 db break up spike that covers well over an octave starting just above 1 Khz! It is VERY audible and requires a very specific trap to tame. And at $80 it is no bargain! It's only positive traits (for OB use) is that it is pretty rugged, is widely available and High QTS.
I tested the Alpha out 10 years ago as a potential woofer for the original Manzanita. Was SO disapointed!!
True sensitivity is more like 92 db/watt down where you use it, below 500 HZ. Total displacement is only 325 CC due to the paltry 3.8 mm xmax. VERY low for a 15" class woofer. F/S is a high 41 Hz.
Can it work in an OB application, well yes. Does it work well, NO! So many far better options out there for equal or less money.
I keep reading about how wonderful the Eminence Alpha 15A is as an OB woofer. Actually, it is a lousy woofer by any standard!! One of the few Eminence products I do not like. The worst aspect is the HUGE 12 db break up spike that covers well over an octave starting just above 1 Khz! It is VERY audible and requires a very specific trap to tame. And at $80 it is no bargain! It's only positive traits (for OB use) is that it is pretty rugged, is widely available and High QTS.
I tested the Alpha out 10 years ago as a potential woofer for the original Manzanita. Was SO disapointed!!
True sensitivity is more like 92 db/watt down where you use it, below 500 HZ. Total displacement is only 325 CC due to the paltry 3.8 mm xmax. VERY low for a 15" class woofer. F/S is a high 41 Hz.
Can it work in an OB application, well yes. Does it work well, NO! So many far better options out there for equal or less money.
Many does disagree with you, but if you would be right, why don't you mention wich woofer you would suggest? That is what the OP asks...
Have you looked at the Goldwood GW-1858?....an eighteen with a Qtc of 1.1 ...ideal for OB. The simmed value for a bass reflex at 125.6 cubic feet!, for an f3 of 17 hertz. yes, OB only...
-------------------------------------------------------------------------Rick..
-------------------------------------------------------------------------Rick..
Now that some one has asked
Putting a $100 give or take price limit and assuming 12"-15"-18", and assuming fairly wide availability, and most important, easy to work with crossover wise, one would do well to consider any of the following:
Peerless SLS 830669. Clean, medium efficiency and good xmax. Easy to use.
SB Audience Bianco 120B150. Similar to the Peerless above. A bit more money.
Parts Express GRS 15. Excellent OB qualities and bang for the buck.
PRV 15W700. Good build quality. Large displacement. Must get out by 350 Hz.
Goldwood GW-1858. Lots of grunt down low. Great in parallel pairs.
PE - Dayton PA400. QTS is a bit low but well built and with nice roll off. Also good in a parallel dual format.
Peerless FSL-1830R06-08. Tremendous output, especially if used in parallel pairs. Midium QT. But must be out by 300 Hz.
I have used all of the above plus others. Your milage may vary! Merry Christmas all!! J
Putting a $100 give or take price limit and assuming 12"-15"-18", and assuming fairly wide availability, and most important, easy to work with crossover wise, one would do well to consider any of the following:
Peerless SLS 830669. Clean, medium efficiency and good xmax. Easy to use.
SB Audience Bianco 120B150. Similar to the Peerless above. A bit more money.
Parts Express GRS 15. Excellent OB qualities and bang for the buck.
PRV 15W700. Good build quality. Large displacement. Must get out by 350 Hz.
Goldwood GW-1858. Lots of grunt down low. Great in parallel pairs.
PE - Dayton PA400. QTS is a bit low but well built and with nice roll off. Also good in a parallel dual format.
Peerless FSL-1830R06-08. Tremendous output, especially if used in parallel pairs. Midium QT. But must be out by 300 Hz.
I have used all of the above plus others. Your milage may vary! Merry Christmas all!! J
Active crossover is good, it solves some problems. For one, differences in efficiency can hopefully be handled in the crossover.
I have found that a very high Qts is not that useful. I like a woofer with a Qts between 0.5 and 1.0. The issues are similar to an acoustic suspension, except there is no box volume parameter to push the Qts (and Fs) up.
I started my in home open baffle listening with a pair of Hawthorne Silver Iris drivers. They were a custom Eminence driver, probably closest to a Beta 15. They have very nice bass.
I am currently listening to Classical music on small open baffles with two Visaton WS 17 woofers per side. The Fs is in the mid 40s and the Qts is around 0.8. This is a nice combo for a smaller room as long as you don't want thundering bass.
I have found that a very high Qts is not that useful. I like a woofer with a Qts between 0.5 and 1.0. The issues are similar to an acoustic suspension, except there is no box volume parameter to push the Qts (and Fs) up.
I started my in home open baffle listening with a pair of Hawthorne Silver Iris drivers. They were a custom Eminence driver, probably closest to a Beta 15. They have very nice bass.
I am currently listening to Classical music on small open baffles with two Visaton WS 17 woofers per side. The Fs is in the mid 40s and the Qts is around 0.8. This is a nice combo for a smaller room as long as you don't want thundering bass.
Thanks y'all.
It would probably help if I gave a budget. I would like to stay under $1,000 USD.
I'm thinking two 12" woofers per side. H or U baffle probably.
It would probably help if I gave a budget. I would like to stay under $1,000 USD.
I'm thinking two 12" woofers per side. H or U baffle probably.
-with 3 outputs per channel on your crossover & a desire for 2 12" (or less) for your low freq. driver (in open baffle),
I'd suggest a 3-way with midbass drivers and a subwoofers - the subwoofers can be monopole or OB.
For the midbass (down to about 50 Hz with steep high-pass filter), I'd suggest:
Eminence Deltalite II 2512 Neo 12" Speaker Driver
-look at the HD freq. response 20mm in that bandwidth, and remember you've got a lot of gain to lower in that same bandwidth to match the planar's.
For lower freq.s I'd look at the Dayton Reference series 12" drivers.
I'd suggest a 3-way with midbass drivers and a subwoofers - the subwoofers can be monopole or OB.
For the midbass (down to about 50 Hz with steep high-pass filter), I'd suggest:
Eminence Deltalite II 2512 Neo 12" Speaker Driver
-look at the HD freq. response 20mm in that bandwidth, and remember you've got a lot of gain to lower in that same bandwidth to match the planar's.
For lower freq.s I'd look at the Dayton Reference series 12" drivers.
For a little more output.....
BIANCO-150B350
SB Audience Bianco-150B350- 15" Open Baffle Woofer
The .PDF shows a QTS of 0.5
Madisound shows a QTS of 0.7 in their specs.
C.M
BIANCO-150B350
SB Audience Bianco-150B350- 15" Open Baffle Woofer
The .PDF shows a QTS of 0.5
Madisound shows a QTS of 0.7 in their specs.
C.M
..and should you just do it as a "2-way"?
Actually, it would be best that way - but only in one configuration:
Stereo midbass NEARFIELD dipoles. (..with suitable delay of course.)
That's however a one-person-only-listening design.
Actually, it would be best that way - but only in one configuration:
Stereo midbass NEARFIELD dipoles. (..with suitable delay of course.)
That's however a one-person-only-listening design.
Which of these would be best around 500 750hz? If none, is there a better suggestion for a tad bit more $$$?