"Frederik was the CAST developed for Burt's horn systems?"
He was certainly the guy, who prompted us to go beyond the VSF. I wouldnt say the caps were developed specifically for his speakers though. They do seem to be a good fit.
"Is that why I noticed so much noise difference from VSF to CAST is the exagerration of noise caused by horns?"
Well, I dont use horns myself, and notice quite a difference as well. I believe its more a question of well designed speakers, than the choice of, ported, sealed, horns etc.
"This may be a touchy subject you may not want to answer and I understand, but the cost of CAST? Can they ever be mass produced? or VSF? Is it a volume issue or a manufacturing process issue? I remember reading Steen saying when the VSF came out that they only could be hand made."
They are certainly not mass produceable at the moment. I would say a mass production would only be possible if we were to develop our own kind of machinery, which is not currently feasible. Certainly, I would like to be able to do so in the future. However, this area of business is not typically something that creates large investment ability.
"Another question that has intriqued me is the noise reduction from VSF to CAST? Why? I for one did not expect it. Both modern caps and I understood noise reduction from vintage to modern but from top notch modern (VSF) to CAST I was not ready for. Is it the hardening process? Also have you reached the limits with CAST or is there still that same kind of noise reduction still possible?"
The CAST is special in the sense that we can harden it after the vacuum impregnation, something not feasible with the VSF. I hope in the future we will be able to take it further than the CAST. The CAST 630v cap is already using a more elaborate system than the regular CAST. We are researching different metal foils, paper types and CAST materials, those are other venues that may or may not yield improvements down the line.
"Could I expect the same kind of noise reduction on coupling caps in vintage tube amp to VSF or CAST that there is in the passive? or not the same magnitude?"
An impossible question for me to answer in good conscience. For one thing, I havent heard the improvement you got. Secondly, I have no experience with your electronics. I use CAST myself in my electronics, and do not want to do otherwise, but if its worthwhile for you?
"Thanks again."
A pleasure.
He was certainly the guy, who prompted us to go beyond the VSF. I wouldnt say the caps were developed specifically for his speakers though. They do seem to be a good fit.
"Is that why I noticed so much noise difference from VSF to CAST is the exagerration of noise caused by horns?"
Well, I dont use horns myself, and notice quite a difference as well. I believe its more a question of well designed speakers, than the choice of, ported, sealed, horns etc.
"This may be a touchy subject you may not want to answer and I understand, but the cost of CAST? Can they ever be mass produced? or VSF? Is it a volume issue or a manufacturing process issue? I remember reading Steen saying when the VSF came out that they only could be hand made."
They are certainly not mass produceable at the moment. I would say a mass production would only be possible if we were to develop our own kind of machinery, which is not currently feasible. Certainly, I would like to be able to do so in the future. However, this area of business is not typically something that creates large investment ability.
"Another question that has intriqued me is the noise reduction from VSF to CAST? Why? I for one did not expect it. Both modern caps and I understood noise reduction from vintage to modern but from top notch modern (VSF) to CAST I was not ready for. Is it the hardening process? Also have you reached the limits with CAST or is there still that same kind of noise reduction still possible?"
The CAST is special in the sense that we can harden it after the vacuum impregnation, something not feasible with the VSF. I hope in the future we will be able to take it further than the CAST. The CAST 630v cap is already using a more elaborate system than the regular CAST. We are researching different metal foils, paper types and CAST materials, those are other venues that may or may not yield improvements down the line.
"Could I expect the same kind of noise reduction on coupling caps in vintage tube amp to VSF or CAST that there is in the passive? or not the same magnitude?"
An impossible question for me to answer in good conscience. For one thing, I havent heard the improvement you got. Secondly, I have no experience with your electronics. I use CAST myself in my electronics, and do not want to do otherwise, but if its worthwhile for you?
"Thanks again."
A pleasure.