Express interest in a variant of the Altec Model 19 crossover I developed nearly three years ago has motivated me to build up a pair. It was originally posted on Lansing Heritage Forum here:
http://www.audioheritage.org/vbulle...-Altec-9844-8B&p=197971&viewfull=1#post197971
Since then, the design has been built and used successfully by Skywave-Rider, Similost, Dc270, and others. Here's my version, from the original schematic:
Shamefully, I myself had no data on how it actually performs other than the SPICE sims originally posted in Skywave's LHF thread, so I mounted a B&C DE250 on an Altec 511A and dialed it in to mate with the LE14A in my test stand:
Yah, that's +/- 1 dB there.
Yah, biampable.
Here is the wavelet transform:
The cumulative spectral decay:
And the full adjustable range of Z19 with this driver and horn:
http://www.audioheritage.org/vbulle...-Altec-9844-8B&p=197971&viewfull=1#post197971
Since then, the design has been built and used successfully by Skywave-Rider, Similost, Dc270, and others. Here's my version, from the original schematic:
Shamefully, I myself had no data on how it actually performs other than the SPICE sims originally posted in Skywave's LHF thread, so I mounted a B&C DE250 on an Altec 511A and dialed it in to mate with the LE14A in my test stand:
Yah, that's +/- 1 dB there.
Yah, biampable.
Here is the wavelet transform:
The cumulative spectral decay:
And the full adjustable range of Z19 with this driver and horn:
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