F6 sounds lovely on classical bass viola - very sensitive, excellent top end - beautiful. Greg B's little (~12X12X21") Karlson variant is good compliment and probably more effective/better sounding than a larger volume lower tuned ML-TL. Detailed plans for the Karlsonator 6 can be found at fullrangedriver buried in the Karlson section
with good recordings, the little Karlson variant and F6 L.Cao play nicely & smoothly on vocals. flamenco guitar, cello & piano sonata. There's no need for any helper tweeter. For those not familiar with Greg B's design, here's a drawing (a larger plan is downloadable from his album)
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'Zilla,
If you want to convert a box to one with a Karlson aperture, I suggest the Karlsonator as shown above and not a Karlson proper (multi-chambered bandpass reflex style a la K15). Those do not scale well below 12 in driver at all (no bass). A Karlsonator scaled for a 6 in or 8 in driver can work very well - check out some of the sims in the Karlsonator thread. My guess is FE168Z can work well. I may have sim'd it already can't recall off hand.
If you want to convert a box to one with a Karlson aperture, I suggest the Karlsonator as shown above and not a Karlson proper (multi-chambered bandpass reflex style a la K15). Those do not scale well below 12 in driver at all (no bass). A Karlsonator scaled for a 6 in or 8 in driver can work very well - check out some of the sims in the Karlsonator thread. My guess is FE168Z can work well. I may have sim'd it already can't recall off hand.
here are the specs on the F6 model - -cone diameter is roughly 5" not including the surround. Add 1/2 of the surround and its ~5.125" diameter - so SD for the F6 would be ~130sq.cm vs 88.25 for an Alpair 10P, or 147.41 for 12P.
search Ebay with these terms "match pair 2pcs Lcao HiEND 6.5inch fullrange speaker ,PK lowther fostex"
Zilla - if your box has this aspect then you might make a Karlsonator - otherwise it probably would still convert to some sort of K - probably with higher cutoff. Rear volume should not go below (Vas*fs*qts)/50 as a rough rule.
F6 spec (there's also an alnico version at 3X the cost) - I think F6 would be appreciated by FR lovers. Delivery was very fast - maybe a week or so from China.
search Ebay with these terms "match pair 2pcs Lcao HiEND 6.5inch fullrange speaker ,PK lowther fostex"
Zilla - if your box has this aspect then you might make a Karlsonator - otherwise it probably would still convert to some sort of K - probably with higher cutoff. Rear volume should not go below (Vas*fs*qts)/50 as a rough rule.
F6 spec (there's also an alnico version at 3X the cost) - I think F6 would be appreciated by FR lovers. Delivery was very fast - maybe a week or so from China.
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I concur with xrk971: a scaled 'standard' Karlson will not have deep bass. Karlsonator is a better choice, but of course I am biased.
The specs for the old FE168Z are ballpark, so it should work, but I haven't tried to sim it.
hey guys - what kind of K do you think would be most appropriate for a little B&C 10" with the following spec? a 12" could be used but this would be "cute" and probably very potent with an internally mounted K-tube with decent compression driver coming in around 1K8 - not sure if the 5mm xmax could be used without audible "gargle" - might get another dB sensitivity with half that much xmax in a B&C10. Eminence has a new 10 called LA10850 which may play well but the B&C has the prettier frame
Eminence
LA10850 spec - fwiw it has low moving mass and a 4" coil so thermal compression may be relatively low
http://www.eminence.com/pdf/LA10850.pdf
the goal would be good quality sound and have more punch than a direct radiator or blh. Of course the K-tube could be mounted on top and still blend well. The result would have better treble power response than 6-8" fullrange drivers and hopefully do 120dB peaks without strain.
Product Specifications
Nominal Diameter10"
Power Handling (RMS)250 Watts
Power Handling (max)500 Watts
Impedance8 ohms
Frequency Response65 to 3,000 Hz
Sensitivity98 dB 1W/1m
Voice Coil Diameter2.5"
Thiele-Small Parameters
Resonant Frequency (Fs)63 Hz
DC Resistance (Re)5 ohms
Voice Coil Inductance (Le)0.9 mH
Mechanical Q (Qms)3.4
Electromagnetic Q (Qes)0.25
Total Q (Qts)0.23
Compliance Equivalent Volume (Vas)0.95 ft.³
BL Product (BL)16.4 Tm
Diaphragm Mass Inc. Airload (Mms)34g
Maximum Linear Excursion (Xmax)5 mm
Eminence
LA10850 spec - fwiw it has low moving mass and a 4" coil so thermal compression may be relatively low
http://www.eminence.com/pdf/LA10850.pdf
the goal would be good quality sound and have more punch than a direct radiator or blh. Of course the K-tube could be mounted on top and still blend well. The result would have better treble power response than 6-8" fullrange drivers and hopefully do 120dB peaks without strain.
An externally hosted image should be here but it was not working when we last tested it.
Product Specifications
Nominal Diameter10"
Power Handling (RMS)250 Watts
Power Handling (max)500 Watts
Impedance8 ohms
Frequency Response65 to 3,000 Hz
Sensitivity98 dB 1W/1m
Voice Coil Diameter2.5"
Thiele-Small Parameters
Resonant Frequency (Fs)63 Hz
DC Resistance (Re)5 ohms
Voice Coil Inductance (Le)0.9 mH
Mechanical Q (Qms)3.4
Electromagnetic Q (Qes)0.25
Total Q (Qts)0.23
Compliance Equivalent Volume (Vas)0.95 ft.³
BL Product (BL)16.4 Tm
Diaphragm Mass Inc. Airload (Mms)34g
Maximum Linear Excursion (Xmax)5 mm
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hi KaffiMann - I'd imagine the 3mm figure to be peak to peak - - my box may have a dip in that area but things sound pretty good. I've not tried their filter -- from reading on another forum the filter suggested for one of their 8" wasn't centered properly.
Look at the impedance test I just ran on the unplayed F6 - that's one clue how they're getting good treble extension - impedance at 20KHz is only 10 ohm http://i.imgur.com/lPXJYKl.gif
Look at the impedance test I just ran on the unplayed F6 - that's one clue how they're getting good treble extension - impedance at 20KHz is only 10 ohm http://i.imgur.com/lPXJYKl.gif
Thank you. That says it all. Seems like a well thought out driver. Would possibly be fun to combine in a sealed chamber with a 12" maybe 15" well built BR, 1st order xo between 2-500hz. No other adjustments needed
Sure that karlsonator does not have a small peak at 800hz then? That might be the great part of the combination.
Sure that karlsonator does not have a small peak at 800hz then? That might be the great part of the combination.
re:800 = don't know if I'm that lucky2
here's impedance of unit 2 L.Cao F6 (never played) free air vs unit 1 (played a bit but not hard enough to see the cone move) with unit 1 installed in Greg B's Karlsonator 6 prototype - with this driver there seems to be no defined 3rd Z peak - maybe a bit right below 300Hz. There's only a little fluffed polyfil in the stub, and a 25mm thick polyfil pad on the cabinet's bottom.
2 here's impedance of unit 2 L.Cao F6 (never played) free air vs unit 1 (played a bit but not hard enough to see the cone move) with unit 1 installed in Greg B's Karlsonator 6 prototype - with this driver there seems to be no defined 3rd Z peak - maybe a bit right below 300Hz. There's only a little fluffed polyfil in the stub, and a 25mm thick polyfil pad on the cabinet's bottom.
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