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Mini Karlsonator (0.53X) with Dual TC9FD's
Mini Karlsonator (0.53X) with Dual TC9FD's
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Old 31st October 2014, 02:43 AM   #1011
EddieT is offline EddieT  United States
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Thanks X, that is a bargain.
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Old 31st October 2014, 03:29 AM   #1012
a3cervo is offline a3cervo  Philippines
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X, thanks for this very helpful info, very favorable to my intended application. A couple questions more if you don't mind:

you've built other enclosures for the TC9FD, how would you compare the MK .53x vs the DCR & others in terms of details & lows?

Based on your findings, which is the best driver you've used for the MK 0.53x/0.4x?

Regards,
Anton


Quote:
Originally Posted by xrk971 View Post
0.53x has deeper bass in the 50Hz range vs 70Hz for 0.4x. Against a wall is best for deepest bass extension so no problem there - you will like the sound. The 0.53x also has advantage of higher sensitivity and more headroom as the drivers in parallel have 91dB sensitivity at 2.83v. If you have room, go with the bigger one. Good luck.
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Old 31st October 2014, 04:14 AM   #1013
freddi is offline freddi  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
a question X - did you ever work out an 8 cubic foot external bulk Karlsonator15 to compare to K15?
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Old 31st October 2014, 04:21 AM   #1014
xrk971 is online now xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
Quote:
Originally Posted by a3cervo View Post
X, thanks for this very helpful info, very favorable to my intended application. A couple questions more if you don't mind:

you've built other enclosures for the TC9FD, how would you compare the MK .53x vs the DCR & others in terms of details & lows?

The dual driver 0.53x has sound that will fill a larger space - great for a small party. The bass and imaging on the DCR is better but bit won't get as loud - really meant for smaller rooms and close range monitor application with moderate SPL's. I have not built this but my guess is that a 0.53x with dual 3FE25 (2x8ohms parallel) will have 97dB sensitivity and could be the cat's meow.

Based on your findings, which is the best driver you've used for the MK 0.53x/0.4x?

Best is always tough to say.

I haven't tried anything other than dual tc9fd myself in a 0.53x. But as I said above, dual 3FE25's may be the ticket.

For 0.4x the 3FE25 is my new favorite. Although TC9FD is a close second for slightly smoother mids.


Regards,
Anton
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Old 31st October 2014, 04:22 AM   #1015
xrk971 is online now xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
Quote:
Originally Posted by freddi View Post
a question X - did you ever work out an 8 cubic foot external bulk Karlsonator15 to compare to K15?
Not sure what you mean Freddi? You want an apples to apples comparison of Karlasonstor at 8cu ft? That is a big box - what driver?
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Old 31st October 2014, 04:59 AM   #1016
a3cervo is offline a3cervo  Philippines
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Thanks X! Will check out 3FE25s.
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Old 31st October 2014, 05:18 AM   #1017
freddi is offline freddi  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
make the Karlsonator15 the same external bulk as K15 (~7.75 cubic feet) - use a traditional style driver on sale for $199 including the compression driver, make it taller and narrower than K15 and see if the low end can be significantly extended without losing punch.

if you can't get it in the same bulk, then raise it a bit

P AUDIO_BM15CXA

I kind of doubt if Qts is this low but "maybe"

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WOOFER MODEL - BM15CXA

Low Frequency Specifications

Nominal Basket Diameter

15" / 381mm

Impedance

8 ohms

RMS Power Rating

350 watts

Program Power Rating 700 watts
Frequency Range

40Hz - 18kHz

Sensitivity (1W/1m)

101dB SPL

Voice Coil Diameter

2.5" / 63.5mm

Magnet Weight 100 oz.
High Frequency Specifications

Rated Impedance 8 ohms
RMS Power Rating 40 watts
Program Power Rating 80 watts
Frequency Range 1.5kHz - 18kHz
Sensitivity (1W/1m) 106dB SPL
Voice Coil Diameter 1.75" / 44.5mm
Magnet Weight 3.74 lbs.
Thiele-Small Parameters

Resonant Frequency (Fs) 39 Hz
Impedance (Re) 5.6 ohms
Mechanical Q (Qms) 6.45
Electrical Factor(Qes) .25
Total Q (Qts) .24
Comp. Equivelant Vol. (Vas)
9.09 ft3 / 257.5 Liters

Voice Coil Overhang (Xmax) 2.75 mm
Surface Area of Cone (Sd) .083 m2
BL Factor (BL) 18.45 T-M

Last edited by freddi; 31st October 2014 at 05:23 AM.
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Old 31st October 2014, 08:59 AM   #1018
freddi is offline freddi  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
better yet - coax which I own http://bjl.audioconcept.free.fr/Arch...IES/SN-15C.pdf

fs = 41.0, Re= 5.3, Le = 0.36mH, Qms = 5.030, Qes = 0.371, Qts = 0.346, Vas = 214.54 liters, BL = 16.4, Mms = 73.3 gm, Sd = 0.0850 m2, Xmax = 3.3mm, eta zero = 3.82%, Hag = 12.0mm, Hvc = 18.5mm

got one in a vintage K15 = nice sound - good neo HF driver too

Click the image to open in full size.

Last edited by freddi; 31st October 2014 at 09:10 AM.
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Old 5th November 2014, 06:14 PM   #1019
vitorio is offline vitorio  Spain
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Just an idea that works for me filling the part above driver:
cut a piece of poliester matt same wide and twice long, fold it and push it in.

The poliester get packed very tight at the end, and less above speaker. The felt help to keep it in place, doesn't fall.

Mini Karlsonator (0.53X) with Dual TC9FD's


Mini Karlsonator (0.53X) with Dual TC9FD's


Mini Karlsonator (0.53X) with Dual TC9FD's
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Old 5th November 2014, 07:20 PM   #1020
xrk971 is online now xrk971  United States
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Mini Karlsonator (0.53X) with Dual TC9FD's
Vitorio,
Nice build! Is that a 0.4x? What driver will you be using?
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