Is this a TH candidate?

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13 years 3 weeks ago #12447 by HiSPL
Is this a TH candidate? was created by HiSPL
OK here's the back story. I am a die hard Mac user, but I have just very recently bought a PC to use for audio related things. Therefor I have not been able to play with hornresp or Akabak enough to figure anything out. Honestly just keeping the PC straight is hard enough for me!

I got a pretty good deal on a pair of 18 sound 21LW1400's a while back. I planned on building a pair of single 21's for a small club PA (rock/country/folky). I was sitting last night playing with Sketchup and WinISD when the thought occured to me, "Why not tapped horn?" So what I'm looking for is for some kind soul to tell me if this driver is suitable for a TH. If it is I'll go through the drudgery of hornresp and try to figure it out on my own. If it's not suitable, I'll build the reflex box I am designing already.

TIA,
-=Tim=-

The specs,

18 sound 21LW1400

Nominal Diameter 533 mm (21 in)
Rated Impedance 8 Ohm
AES Power 1400 W
Program Power (1) 1600 W
Peak Power (2) 7000 W
Sensitivity (3) 99 dB
Frequency Range (4) 24 - 2000 Hz
Power Compression @-10dB (5) 0,6 dB
Power Compression @-3dB 1,5 dB
Power Compression @Full Power 2,2 dB
Max Recomm. Frequency 250 Hz
Recomm. Enclosure Volume 120 ÷ 500 lt. (4,24 ÷ 17,7 cuft)
Minimum Impedance 6,4 Ohm at 25°C
Max Peak To Peak Excursion 52 mm (2,05 in)
Voice Coil Diameter 100 mm (4 in)
Voice Coil Winding Material copper
Suspension Triple roll, Polycotton
Cone Straight ribbed, Paper

THIELE SMALL PARAMETERS (6)
Fs 28 Hz
Re 5 Ohm
Sd 0,1662 sq.mt. (257,6 sq.in.)
Qms 9,32
Qes 0,242
Qts
0.235
Vas 385 lt. (13,6 cuft)
Mms 296 gr. (0,65 lb)
BL 33,5 Tm
Linear Mathematical Xmax (7) ± 9,5 mm (± 0,37 in)
Le (1kHz) 2,85 mH
Ref. Efficiency 1W@1m (half space) 98,0 dB

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13 years 3 weeks ago #12449 by MAutopsy
Replied by MAutopsy on topic Is this a TH candidate?
there seems to be a lot of info out there about tapped horns. Read thru all the Cubo threads on here, Mr cubo has done a lot of explaining about the subject. But most importantly search Tom Danley's White paper on Tapped horns and synergy horns.
Mike

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13 years 3 weeks ago #12452 by JJD
Replied by JJD on topic Is this a TH candidate?
The 21LW1400 has been tested with success in the MTH-4654. forum.speakerplans.com/mth-4654_ ... page2.html

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13 years 3 weeks ago #12468 by HiSPL
Replied by HiSPL on topic Is this a TH candidate?
Thanks so much!

Can you tell me, was the MTH4654 size increased to fit this driver, or is the cabinet big enough already?

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13 years 3 weeks ago #12517 by JJD
Replied by JJD on topic Is this a TH candidate?
as I know, the MTH4654 was made for both 21" and 18", in favor of quality to the 21" (more power, les distorsion at very high level)

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