Altec Lansing 604E Duplex Speakers

Sitting on my lap and happily grumbling away. She needs a haircut, she's staticky and has dandruff from the dry air.
 
kyle said:
I downloaded Passive Crossover Designer (free) and measured my 604-8G's with a Woofer Tester 2 in the last couple of days.
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Hey Kyle, nice to see you posting. Would you mind sharing the measurements you got from the 8Gs?
 
kyle said:
I downloaded Passive Crossover Designer (free) and measured my 604-8G's with a Woofer Tester 2 in the last couple of days.
Click to expand...

Hey Kyle, nice to see you posting. Would you mind sharing the measurements you got from the 8Gs?
 
Those are worthy of some fine cabinetry. If you can't do it, pay to have it done. Those are a real find.
 
Here's some T/S numbers for a 604E that I had last year:

Buffer[1] Vas Ver 5.00
Completed: Thu Jul 19 17:02:53 2012
Drive level 79.433 % [ 2.847 mA]
Sine,LoZP(LV/LA)->Vas,19 pts
;------------------------------------------------------------------
Re = 13.6020 ohms
Fs = 24.5361 Hz
Zmax = 268.6107 ohms
Qes = 0.2303
Qms = 4.3178
Qts = 0.2186
Le = 2.4041 mH (at 1 kHz)
Diam = 329.9983 mm ( 12.9921 in )
Sd =85528.9996 mm^2(132.5702 in^2)
Vas = 688.2739 L ( 24.3062 ft^3)
BL = 24.0502 N/A
Mms = 63.5270 g
Cms = 662.3231 uM/N
Kms = 1509.8372 N/M
Rms = 2.2682 R mechanical
Efficiency = 4.1478 %
Sensitivity= 98.1962 dB @1W/1m
Sensitivity= 95.8911 dB @2.83Vrms/1m
Krm = 143.176E-06 ohms Freq dependent resistance
Erm = 1.112E+00 Rem=Krm*(2*pi*f)^Erm
Kxm = 26.907E-03 Henries Freq dependent reactance
Exm = 708.780E-03 Xem=Kxm*(2*pi*f)^Exm
;------------------------------------------------------------------
Ftest = 22.211 Hz
Ftest/Fms = 0.9052
Test Mass used = 14.0000 g (Equal to 2.8 nickels)
Test Mass (Ft=Fms*0.90) = 14.901 g (Add 0.901g for Ft=22.083)
Test Mass (Ft=Fms*0.75) = 49.410 g (Add 35.410g for Ft=18.402)
 
And here are the T/S numbers for a 604-16X:

ALTEC 604-16X
xV4 Q test completed: Fri Dec 30 14:37:21 2011
Q drive current 3181.82 uA
;------------------------------------------------------------------
Revc= 11.8216 ohms
Fs = 32.3495 Hz
Zmax= 114.4585 ohms
Ro = 36.7842 ohms
F0 = 16.6859 Hz
F1 = 61.2162 Hz
Fmin= 281.7060 Hz
Qms = 2.2605
Qes = 0.2604
Qts = 0.2335
Le = 2.1442 mH @1kHz
XLe = 24.2504 impedance @1kHz
PLe = 33.7492 phase @1kHz
Vas = 571.1163 L ( 20.1688 ft^3)
BL = 8.1860 N/A
Mms = 63.4268 g
Cms = 554.5190 uM/N
Kms = 1803.3645 N/M
Rms = 3.3814 R mechanical
Efficiency = 1.4339 %
Sensitivity= 93.5652 dB @1W/1m
Sensitivity= 95.9219 dB @2.83Vrms/1m
Fs= 26.8365 Mms = 63.4268 g
Fsa= 21.4160 Mms+Ma= 99.5968 g
Fs/Fsa = 1.2531
Ideal Test Mass = 35.6776 g
Test Mass used = 36.1700 g
 
Kyle - how do you get 98dB 1W/m and 95.89dB 2.83Vrms/m on the 604E but 93dB 1W/m and 95.92db 2.83Vrms/m for the 604X? Shouldn't the 1W/m efficiencies be near identical if the 2.83Vrms/m are so close?

-D
 
If you look at the Re and Rms values you can see that there are differences. Also, When you see the plotted graphs the R is all over the place on both. The resistance is frequency dependent.
 
Ohm Readings: with my Klein MM200

Speaker one- high freq. 8.5 low freq. 10.8
Speaker two- high freq. 8.2 low freq. 10.3
 
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What would you folks suggest for reading? I am a novice with a thirst - now that I've stumbled upon these great speakers.:yes: Thanks for your indulgence.
 
djnagle said:
Those are worthy of some fine cabinetry. If you can't do it, pay to have it done. Those are a real find.
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Thanks, DJ. Shy a lathe, I'm pretty well set up regards to tools. Carcass joinery and veneer work aren't a problem. Tablesaw is a decent contractors saw, nothing fancy but servicable, Porter Cable router, etc. It's really amazing to me that I still have most of my ten fingers!:D Billfort's rendition has me really intrigued.
 
bobabode said:
What would you folks suggest for reading? I am a novice with a thirst - now that I've stumbled upon these great speakers.:yes: Thanks for your indulgence.
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What, about speakers or...?
I like Ray Alden's speaker (enclosure) design books
Can't go wrong with Dickason's Loudspeaker Design Cookbook, either.
Weems' books are good, too.
check www.partsexpress.com for a listing of some currently/still in print.

For anything else related to hifi electronics... you can do far worse than spend some quality time at Pete Millett's wonderful site www.tubebooks.org
It is a fantastic resource.

For all things Altec - www.lansingheritage.net is a fine place to start.
 
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