spkrman57
03-21-2005, 08:48 AM
When putting together my Edgarhorn system I had drivers in mind that were close, but not the best recommended by Bruce Edgar.
I chose a JBL 2205A for the midbass horn(because I already had a pair). I have since installed the E130/2225 reconed drivers from Mike B. since the Qes was close to ideal for that purpose, not to mention the 2205A is questionable in my mind(magnet lost strength???), and the E130/2225 is ferrite and eliminates the issues there. It is a shame as my 2205A's have cones that look mint, but I have doubts about the midrange response(seems lacking).
Anyways, on to the midrange horn driver selection. I had a pair of Altec 288C's with 16 ohm aluminum diaphrams. (Yes, already on hand). Bruce's recommendation called for a JBL 2441 driver, but unable to locate any without selling 1st born, the 288 pulled duty.
I am wondering if the latest JBL 2" driver(at least to my knowledge) the 2446 is comparable to the 2441??? The Altec 288C is alnico and going to a JBL ferrite seems like a good idea. The 2441's are no longer in production to the best of my knowledge, so what would be the next best available 2" driver to the 2441???
On top of this I bought a pair of Fane ST5022 horn tweeters. While they are probably better than my JBL 075's, I want to use the 075's as I like what they do with my D123's and N2400 crossover that sees part-time duty in the living room. I have heard they shout and beam, but I think they could be used well if crossed over at the right frequency. Note: it is a 16 ohm driver vs the Fane ST5022 which is 8 ohms.
The crossover as it stands currently is a 2.5mh on the midbass horn driver, 40 ufd oil cap and 8 ohm L-pad (parallel 16 ohm resistor across the 288) for the midrange horn(500hz @ 8 ohm), and a 1 ufd cap for the horn tweeter.
I have noticed the time and R & D JBL put in to some of their crossovers. I always thought the minimalist approach was best in speaker crossover design, but after reading many old posts on crossovers and such(and trying to understand Giskard and his explanations, some of which are way over my head). I have come to the conclusion that if my wallet were not so empty, JBL could design a better crossover for my Edgarhorn. With my means being so limited, I think I will have to stay with the 1st order crossover for now.
The bottom end of this system will be Rane AC22 electronic crossover for 80hz down(midbass horn bottom limit) fed off 2nd pre-amp output, and then run into(for now at least) Sansui AU-7900 SS integrated that was just repaired and modded(75WPC) for stereo sub duty into a pair of 2242's that are coming soon.
The Edgarhorn system will be powered by Yamamoto 45 SET amp(2 WPC), DeHavilland "Verve" preamp, and Audio Note cd player with "tube buffered output".
As you can see, I am much into tubed audio gear leaving SS for sub-duty only.
So my questions are related to the midrange compression driver selection(replacing Altec 288 with JBL 2" driver???) , replacing Fane ST5022 tweeter with JBL 075(or keep the Fane???), and last but not least, looking into the possibility of a different crossover scheme(not sure if that would help - or could I afford it???)
At the current time, the system is apart and in the spare bedroom, but I have screwed around long enough and it is time to put the BIG system back together again.
I don't mind criticism of my decisions here, you will not hurt my feelings, so don't be bashfull!!!
Last note: Living room size is 12' x 16' w/8' ceiling. When time permits, and I get rid of my collection of audio pieces and orphan chassis's) from the basement, I can relocate there to a room size of 13' x 21' w/8' ceilings. You can tell I don't have the ideal house for the audio system I have, but I will accept the limitations and live with it. I don't foresee me getting rich anytime soon!!!
Thanks, Ron
I chose a JBL 2205A for the midbass horn(because I already had a pair). I have since installed the E130/2225 reconed drivers from Mike B. since the Qes was close to ideal for that purpose, not to mention the 2205A is questionable in my mind(magnet lost strength???), and the E130/2225 is ferrite and eliminates the issues there. It is a shame as my 2205A's have cones that look mint, but I have doubts about the midrange response(seems lacking).
Anyways, on to the midrange horn driver selection. I had a pair of Altec 288C's with 16 ohm aluminum diaphrams. (Yes, already on hand). Bruce's recommendation called for a JBL 2441 driver, but unable to locate any without selling 1st born, the 288 pulled duty.
I am wondering if the latest JBL 2" driver(at least to my knowledge) the 2446 is comparable to the 2441??? The Altec 288C is alnico and going to a JBL ferrite seems like a good idea. The 2441's are no longer in production to the best of my knowledge, so what would be the next best available 2" driver to the 2441???
On top of this I bought a pair of Fane ST5022 horn tweeters. While they are probably better than my JBL 075's, I want to use the 075's as I like what they do with my D123's and N2400 crossover that sees part-time duty in the living room. I have heard they shout and beam, but I think they could be used well if crossed over at the right frequency. Note: it is a 16 ohm driver vs the Fane ST5022 which is 8 ohms.
The crossover as it stands currently is a 2.5mh on the midbass horn driver, 40 ufd oil cap and 8 ohm L-pad (parallel 16 ohm resistor across the 288) for the midrange horn(500hz @ 8 ohm), and a 1 ufd cap for the horn tweeter.
I have noticed the time and R & D JBL put in to some of their crossovers. I always thought the minimalist approach was best in speaker crossover design, but after reading many old posts on crossovers and such(and trying to understand Giskard and his explanations, some of which are way over my head). I have come to the conclusion that if my wallet were not so empty, JBL could design a better crossover for my Edgarhorn. With my means being so limited, I think I will have to stay with the 1st order crossover for now.
The bottom end of this system will be Rane AC22 electronic crossover for 80hz down(midbass horn bottom limit) fed off 2nd pre-amp output, and then run into(for now at least) Sansui AU-7900 SS integrated that was just repaired and modded(75WPC) for stereo sub duty into a pair of 2242's that are coming soon.
The Edgarhorn system will be powered by Yamamoto 45 SET amp(2 WPC), DeHavilland "Verve" preamp, and Audio Note cd player with "tube buffered output".
As you can see, I am much into tubed audio gear leaving SS for sub-duty only.
So my questions are related to the midrange compression driver selection(replacing Altec 288 with JBL 2" driver???) , replacing Fane ST5022 tweeter with JBL 075(or keep the Fane???), and last but not least, looking into the possibility of a different crossover scheme(not sure if that would help - or could I afford it???)
At the current time, the system is apart and in the spare bedroom, but I have screwed around long enough and it is time to put the BIG system back together again.
I don't mind criticism of my decisions here, you will not hurt my feelings, so don't be bashfull!!!
Last note: Living room size is 12' x 16' w/8' ceiling. When time permits, and I get rid of my collection of audio pieces and orphan chassis's) from the basement, I can relocate there to a room size of 13' x 21' w/8' ceilings. You can tell I don't have the ideal house for the audio system I have, but I will accept the limitations and live with it. I don't foresee me getting rich anytime soon!!!
Thanks, Ron