I'm looking at refurbing some 6th order bandpass subs. The factory
Drivers are proving hard to source as the boxes are over 25 years old...
The Kappa pro 10-lf looks ok in win isd when placed in the same enclosure and porting.
The venue is a basement so it doesn't take a lot of energy to do the job, I have to reuse the cabs that are there..
Who has used these? as I'm having trouble finding a review... No news is good news?
I'd appreciate any comments on this speaker driver.
Cheers
Drivers are proving hard to source as the boxes are over 25 years old...
The Kappa pro 10-lf looks ok in win isd when placed in the same enclosure and porting.
The venue is a basement so it doesn't take a lot of energy to do the job, I have to reuse the cabs that are there..
Who has used these? as I'm having trouble finding a review... No news is good news?
I'd appreciate any comments on this speaker driver.
Cheers
What frequency range is required?
As for reusing the cabs, what are the chamber volumes and tuning frequencies?
The Kappa Pro-10LF only has 7 mm of Xmax so it cannot play low and loud. If the cabinet is tuned high, then that is not a problem.
As for reusing the cabs, what are the chamber volumes and tuning frequencies?
The Kappa Pro-10LF only has 7 mm of Xmax so it cannot play low and loud. If the cabinet is tuned high, then that is not a problem.
The specs of that driver are literally screaming "6th order BP!" "6th order BP!".
I wouldn't mind playing with one to see what's possible to achieve with it.
I wouldn't mind playing with one to see what's possible to achieve with it.
35l rear chamber tuned to mid 40hz front is tiny maybe 8l, tuned up around 110hz.
As far As actual tuning frequencies of the chamber's what's the easiest way to work this out? I'm just changing the values in win isd to match up.
I come up with solid performance down to 40hz with a bit lower rear tuning then it drops like a Stone (must be 18db down at 30hz) this doesn't matter though as they're going to receive lots of assistance from the small room.
The amp has DSP so I can high pass below the tuning frequency to limit excersion.
Yes I think it suits the job as a Bandpass woofer. 40hz should be deep enough as it's a lounge bar with DJ.
As far As actual tuning frequencies of the chamber's what's the easiest way to work this out? I'm just changing the values in win isd to match up.
I come up with solid performance down to 40hz with a bit lower rear tuning then it drops like a Stone (must be 18db down at 30hz) this doesn't matter though as they're going to receive lots of assistance from the small room.
The amp has DSP so I can high pass below the tuning frequency to limit excersion.
Yes I think it suits the job as a Bandpass woofer. 40hz should be deep enough as it's a lounge bar with DJ.
Try a series-tuned 6th order BP. I was looking pretty hard at this driver when I was considering an upgrade for my Enigma build. Here's one interesting model that might be worth looking at (see attached images).
It can also do 30 Hz at 100+ dB at 30 Hz, in a fairly large TH, but that can be designed to fit in a corner and look like a column, LOL.
It can also do 30 Hz at 100+ dB at 30 Hz, in a fairly large TH, but that can be designed to fit in a corner and look like a column, LOL.
Attachments
That horn looks good, I'd it a tapped horn? What's the go with tuning below the fs of a speaker? I'll try not to go off topic, I'm assuming it mainly begins to present a difficult load to the amp
Basically that's what I'm going to do to get to 40hz or just below, I do think I'll give these a go.
My only other concern was at 7mm displacement at about 200w of power in at 40hz
I'll post the screenshots tonight of what I have to work with and would like an opinion.
Tim
Basically that's what I'm going to do to get to 40hz or just below, I do think I'll give these a go.
My only other concern was at 7mm displacement at about 200w of power in at 40hz
I'll post the screenshots tonight of what I have to work with and would like an opinion.
Tim
That's a series-tuned 6th order bandpass. I'd guess that 110dB is at Xmax, so I'd hesitate to use that design in a PA situation, unless there will be quite a few cabinets to make up the SPL.
FWIW, a good 15" in a ~100L ported box will manage >120dB at 40Hz and up.
Chris
FWIW, a good 15" in a ~100L ported box will manage >120dB at 40Hz and up.
Chris
Yeah, but 100L is a much bigger box than than that gnat-sized 6th order BP box 🙂.
It's also a question of exactly what the intended use is for this, and what space is available.
For example this is another option - a ~ 2 cu.ft. net straight offset-driver TL that should provide up to 5dB more peak output. Should actually be an easier build as well. But, it's bigger 🙂
It's also a question of exactly what the intended use is for this, and what space is available.
For example this is another option - a ~ 2 cu.ft. net straight offset-driver TL that should provide up to 5dB more peak output. Should actually be an easier build as well. But, it's bigger 🙂
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I didn't want to mention brands but the cabs are turbosound TSB 110. This all came about as finding the replacements down here is impossible. Now if I was building new: yep 15" in vented box. The venue has two subs and with one still working there is actually enough bass... Capacity 100 people. Great ideas Brian, id say you've convinced me to go with it.
Here's the turbo specks but I'd say the 120db is not at sub frequencies
Frequency Response. 45-180hz. No mention of -3db points
Power Handling 300 wrms 600 peak
Nominal Impedance 2x4 ohm
Sensitivity 95 1w 1m
Calc. Max SPL 120 cont 126 peak. Dunno about this, probably at 120hz.....
330mm x 585mm x 330mm (13" x 23" x 13")
16.5 kg (36.3 lbs)
45Hz to 180Hz
Tim
Here's the turbo specks but I'd say the 120db is not at sub frequencies
Frequency Response. 45-180hz. No mention of -3db points
Power Handling 300 wrms 600 peak
Nominal Impedance 2x4 ohm
Sensitivity 95 1w 1m
Calc. Max SPL 120 cont 126 peak. Dunno about this, probably at 120hz.....
330mm x 585mm x 330mm (13" x 23" x 13")
16.5 kg (36.3 lbs)
45Hz to 180Hz
Tim
As you've got one on hand, just take its impedance curve. The tuning frequencies will be at the impedance minimums.
The TS 110 B is rated at 95dB/1W/1M. Check to see if the replacement achieves that in the sim.
Thanks Brian, great advice on impedance minimums being tuning freqs and yeah your right on. I didn't think about that if the 1w rating matches in spl the more powerfull driver wins out.
I'd say I'm all sorted with this one.
Cheers
I'd say I'm all sorted with this one.
Cheers
Fortunately, this is a proper Turbosound product from back in the day when they did proper datasheets, and FullCompass still have a copy on their site 😉
Said document says approx 45Hz and 90Hz for the tunings, and the screw pattern on the back implies approx 4:1 ratio of (gross) internal volumes, not accounting for the space taken up by the driver itself, ports, bracing etc.
A frequency response comprising a hump centered around 70-80Hz isn't surprising for a small "sub" aimed at shops/cafes/bars etc, where as long as there's a semblance of kick drum happening most people will be satisfied.
FWIW, 600Watts (peak), assuming no power compression or port choking, plus the 98ish dB sensitivity @ 80Hz, does calculate out to 125.78dB peak, so I wouldn't say Turbo were bullshitting too badly by rounding that up to the nearest whole dB for their nominal max SPL figure.
HTH,
David.
Said document says approx 45Hz and 90Hz for the tunings, and the screw pattern on the back implies approx 4:1 ratio of (gross) internal volumes, not accounting for the space taken up by the driver itself, ports, bracing etc.
A frequency response comprising a hump centered around 70-80Hz isn't surprising for a small "sub" aimed at shops/cafes/bars etc, where as long as there's a semblance of kick drum happening most people will be satisfied.
FWIW, 600Watts (peak), assuming no power compression or port choking, plus the 98ish dB sensitivity @ 80Hz, does calculate out to 125.78dB peak, so I wouldn't say Turbo were bullshitting too badly by rounding that up to the nearest whole dB for their nominal max SPL figure.
HTH,
David.
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A quick update.
The client is happy at nearly 12 months on from the replacement. I would say they may not have gone quiet as deep initially, but after a bit of run in time
and a good 6 months of use they appear to be doing the job well.
Thank you all.
The client is happy at nearly 12 months on from the replacement. I would say they may not have gone quiet as deep initially, but after a bit of run in time
and a good 6 months of use they appear to be doing the job well.
Thank you all.