Ingvar Ahlberg
08-29-2005, 11:52 AM
Hi, new on this forum i hope i´m starting this thread in the right place.
After starting my audiolife around a pair of L100´s in the early 70´s and then comencing to horn design with JBL drivers i strayed into a lot of strange low efficiency systems, a long and sad story. A year ago the cat ate the foam edge surrounds of my RCF L12P48 bass units. Just prior to this i had got hold of a pair of unused 122A. I designed and put a TQWT design for these together and ended up with something closer to real life than anything i´ve heard. Really unbelievable bottom end extension (19 Hz in my livingroom), a little bit soft at the lowest octave maybe, perhaps a contribution from the Accuphase power amp driving the LF. Hf unit is a Heil AMT wich is ;imo; one of the best there is.
Just the other day i aquired two pristine D120 F units and started to think about a real JBL rock´n roll monitor. The idea is to design a TQWT for the D120´s and top it with my Alnico L75`s at around 5kHz, Finaly around at the question: is there anyone around here that has tried the D120 in a pipe? Horn would be the most obvious way, but then there is the WAF matter.
After starting my audiolife around a pair of L100´s in the early 70´s and then comencing to horn design with JBL drivers i strayed into a lot of strange low efficiency systems, a long and sad story. A year ago the cat ate the foam edge surrounds of my RCF L12P48 bass units. Just prior to this i had got hold of a pair of unused 122A. I designed and put a TQWT design for these together and ended up with something closer to real life than anything i´ve heard. Really unbelievable bottom end extension (19 Hz in my livingroom), a little bit soft at the lowest octave maybe, perhaps a contribution from the Accuphase power amp driving the LF. Hf unit is a Heil AMT wich is ;imo; one of the best there is.
Just the other day i aquired two pristine D120 F units and started to think about a real JBL rock´n roll monitor. The idea is to design a TQWT for the D120´s and top it with my Alnico L75`s at around 5kHz, Finaly around at the question: is there anyone around here that has tried the D120 in a pipe? Horn would be the most obvious way, but then there is the WAF matter.