Looking for a 10 woofer to go in a transmission line cabinet. Cabinet will be built to suit the woofer. Woofer box height approx 30" volume around 2.5 ft (71L). The line can be folded once or more. It will have an OB fullrange above it.
The woofer needs to be available in Europe/UK. Maybe the Peerless SLS-10?
I don't know 10s very well, so am looking for some advice. Thanks!
The woofer needs to be available in Europe/UK. Maybe the Peerless SLS-10?
I don't know 10s very well, so am looking for some advice. Thanks!
Hi pano,
Yes the SLS 10 is a very good choice ! I like a lot this woofer For me it is the best choice in this price range.
It is difficult to find a 10" made for other thing than bass reflex...
Regards.
http://www.audioxpress.com/magsdirx/ax/addenda/media/johannesen2835.pdf
Yes the SLS 10 is a very good choice ! I like a lot this woofer For me it is the best choice in this price range.
It is difficult to find a 10" made for other thing than bass reflex...
Regards.
http://www.audioxpress.com/magsdirx/ax/addenda/media/johannesen2835.pdf
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How about SB Acoustics?
If they're available in Europe, the SB Acoustics 10" woofer, SB29NRX75-6, works really well in a TL. Using Martin King's software, I just modeled a 10:1 tapered TL for this SB woofer. The line I modeled is 80" long and contains a volume of 72 liters. It would have to be folded probably twice to fit within a 30" height. I've attached the system response that I modeled.
Paul
If they're available in Europe, the SB Acoustics 10" woofer, SB29NRX75-6, works really well in a TL. Using Martin King's software, I just modeled a 10:1 tapered TL for this SB woofer. The line I modeled is 80" long and contains a volume of 72 liters. It would have to be folded probably twice to fit within a 30" height. I've attached the system response that I modeled.
Paul
Attachments
If it's possible you'd build what I modeled, here's more information. The closed end of the line is 12"W x 10"D, and the open end is 12"W x 1" deep. The terminus is the same area as the end of the line but you might want to make it 6"W x 2"H, or 8"W x 1.5"H, for instance, so its aspect ratio isn't too large. I modeled with the woofer's center 16" from the closed end of the line, and I used a stuffing density of 0.75 lb/ft3, requiring a total of ~2 pounds of polyester-type stuffing uniformly distributed by density in the first 54 inches of the line's length. You can decrease the stuffing density or decrease the stuffing length if you want F3 to be a bit lower. Oh, that response graph represents the output SPL for a 2.83-volt input (re: 1 meter).
Paul
Paul
Thanks guys! Some good choices, then. And thank you Paul for the model all ready to go.
Thanks again, Paul.
Looks like the Peerless may be the driver in this case. It's available in the UK for not much money and it's a good driver. The SBs are in Denmark or Germany. (still possible).
The Volts are £280 each...
Looks like the Peerless may be the driver in this case. It's available in the UK for not much money and it's a good driver. The SBs are in Denmark or Germany. (still possible).
The Volts are £280 each...
I was thinking a bit ago about the model and I discovered I made a mistake. It actually contains a volume more like 86 liters instead of 72 liters. Sometimes my fingers go way faster than my brain when using a calculator. 😱 The volume could be reduced appropriately but that would naturally raise F3 some.
Paul
Paul
Pano, I recently bought some smaller SBs from Europe Audio, and very nice they are too. Delivery was fast and prices good so I have no problem recommending them to any UK resident. Much better than Wilmslow or Falcon.
No problem for me to recommend Europe Audio too, very good services. Better than shops in my country.
Thanks for the tips, guys. I posted yesterday but it got lost. ;(
The peerless has been ordered, so that's what we'll work with.
Anyone care to take a stab at it in the MJK worksheet? I used to have it, but the license expired.
Nominal specs are:
Znom 8 ohm
Re 5.6 ohm
Le 3.3 mH
fs 33.3 Hz
Qms 4.85
Qes 0.57
Qts 0.51
Mms 51.1 g
Cms 0.45 mm/N
Sd 335 cm2
BL 10.2 N/A
Vas 69.3 ltrs
Xmax 8 mm peak
The peerless has been ordered, so that's what we'll work with.
Anyone care to take a stab at it in the MJK worksheet? I used to have it, but the license expired.
Nominal specs are:
Znom 8 ohm
Re 5.6 ohm
Le 3.3 mH
fs 33.3 Hz
Qms 4.85
Qes 0.57
Qts 0.51
Mms 51.1 g
Cms 0.45 mm/N
Sd 335 cm2
BL 10.2 N/A
Vas 69.3 ltrs
Xmax 8 mm peak
TL for the Peerless
Frankly, the SB 10-incher works out much, much better in a TL than this Peerless; it will play lower in frequency in a smaller volume and it has a larger Xmax. But that's a moot issue at this point it seems. So, just to close the loop, I modeled a 20:1 tapered TL and have attached the resulting system response graph. The line is 60" long and starts at 12"W x 15"D, then ends at 12"W x 0.75"D. The woofer's center is 12" from the beginning of the line. Stuffing density is 0.75 lb/ft3, requiring ~30 ounces of stuffing uniformly distributed by density in the first half of the line. The line could be folded once to fit into an internal height of 30". With a 40-watt input, the woofer outputs ~108 dB SPL, the woofer hits its Xmax +15% at 20 Hz, and the air velocity in the terminus peaks at 3% of the speed of sound (10 m/s).
Paul
Frankly, the SB 10-incher works out much, much better in a TL than this Peerless; it will play lower in frequency in a smaller volume and it has a larger Xmax. But that's a moot issue at this point it seems. So, just to close the loop, I modeled a 20:1 tapered TL and have attached the resulting system response graph. The line is 60" long and starts at 12"W x 15"D, then ends at 12"W x 0.75"D. The woofer's center is 12" from the beginning of the line. Stuffing density is 0.75 lb/ft3, requiring ~30 ounces of stuffing uniformly distributed by density in the first half of the line. The line could be folded once to fit into an internal height of 30". With a 40-watt input, the woofer outputs ~108 dB SPL, the woofer hits its Xmax +15% at 20 Hz, and the air velocity in the terminus peaks at 3% of the speed of sound (10 m/s).
Paul
Attachments
Hi Paul,
I really like to see your simulations 😉 Many Thanks for helping us 😉
The strength of the peerless is it price/performance ratio is unbeatable.
Regards.
I really like to see your simulations 😉 Many Thanks for helping us 😉
The strength of the peerless is it price/performance ratio is unbeatable.
Regards.
Thanks, I enjoy modeling TLs and being able to help others. The SB 10-incher lists for ~$150 at Madisound. I don't know exactly which woofer the Peerless is, so can't compare pricing, but the SB has a larger Xmax (11 vs. 8 mm) and will have a significantly lower F3 in a smaller TL volume than the Peerless. Before anyone asks, I did not spend a lot of time modeling the TLs for either driver and I suspect both lines could be optimized quite a bit more.
Paul
Paul
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