JBL experts please help. I have a set of JBL 127h-1s that I'm going to build 2-way speakers around. I see on the chart that JBL made 127H, 127H-2, 127H-3 and 127H-4 10" woofers. I don't see 127H-1s on this chart? The woofers have black frames and are stamped 127H-1 with white paint from the factory.
I'm no speaker design genius so I was going use the same tweeters and start with the crossover design that JBL used in there MB410s that have 127H-4s. Are the 127H-1 and 127H-4s similar enough or is there a better JBL two way speaker to imitate for my project?
Thanks for any and all input.
I'm no speaker design genius so I was going use the same tweeters and start with the crossover design that JBL used in there MB410s that have 127H-4s. Are the 127H-1 and 127H-4s similar enough or is there a better JBL two way speaker to imitate for my project?
Thanks for any and all input.
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Used in the 4410.
Measured specs from back in early 1986, posted on Lansing Heritage forum, so this far forward YMMV/FWIW, but obviously better than nothing 😉:
Fs = 31 Hz
Z max @ Fs = 138 ohms
R1 = 29 ohms
F1 = 23.5 Hz
F2 = 42 Hz
Qts = .357
Qms = 8.077
Qes = .3735
Fsb = 75.4 Hz
Z max @ Fsb = 120 ohms
R1b = 27 ohms
F1b = 66 Hz
F2b = 85
Vb = .8 cu ft
No = .87%
SPL = 91.58 dB
Cms = 6.8E-4 M/N
Mms = 38g
Bl = 11.07
Le = .76 mH
Re = 6.1 ohms
Vas = 4.0 cu ft
Measured specs from back in early 1986, posted on Lansing Heritage forum, so this far forward YMMV/FWIW, but obviously better than nothing 😉:
Fs = 31 Hz
Z max @ Fs = 138 ohms
R1 = 29 ohms
F1 = 23.5 Hz
F2 = 42 Hz
Qts = .357
Qms = 8.077
Qes = .3735
Fsb = 75.4 Hz
Z max @ Fsb = 120 ohms
R1b = 27 ohms
F1b = 66 Hz
F2b = 85
Vb = .8 cu ft
No = .87%
SPL = 91.58 dB
Cms = 6.8E-4 M/N
Mms = 38g
Bl = 11.07
Le = .76 mH
Re = 6.1 ohms
Vas = 4.0 cu ft