Chris,
40 year old electrolytic capacitors do not quite perform as new. I tried to estimate the ESR but the real issue is that it is an axial type. They have a folded aluminum foil strip to allow the guts to slide into the case. That raises the inductance by quite a bit over axial construction.
As the custom labelled yellow capacitors were Tecate Mylar ones and my stocks had both Tecate yellow mylars to make up the required 80 uF and the polypropylene ones I chose the polypropylene ones.
If I get the chance I will measure the old ones. For obvious reasons I did not change any of the internal wiring, as thin as it is.
However my OPINION is that the room is at least as important as the loudspeaker.
As to modding the tweeter, may get around to that.
My units are Mylar caps but not mirrored HF. Very pleasantly surprised at how well they held up. I did loose my Acoustats in a flood 13 years, 2 months, 6 days and 18.5 hours ago.
40 year old electrolytic capacitors do not quite perform as new. I tried to estimate the ESR but the real issue is that it is an axial type. They have a folded aluminum foil strip to allow the guts to slide into the case. That raises the inductance by quite a bit over axial construction.
As the custom labelled yellow capacitors were Tecate Mylar ones and my stocks had both Tecate yellow mylars to make up the required 80 uF and the polypropylene ones I chose the polypropylene ones.
If I get the chance I will measure the old ones. For obvious reasons I did not change any of the internal wiring, as thin as it is.
However my OPINION is that the room is at least as important as the loudspeaker.
As to modding the tweeter, may get around to that.
My units are Mylar caps but not mirrored HF. Very pleasantly surprised at how well they held up. I did loose my Acoustats in a flood 13 years, 2 months, 6 days and 18.5 hours ago.
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Good idea to finally change out those caps for polyprop for greater clarity.
Most people listen in far field (indirect) and have to contend with room acoustic issues and its major affect on the sound/accuracy.
THx-RNMarsh
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and varying ESR and C with current and freq. Maybe phase modulation?
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I had DQ 10's with the mirror image and film cap upgrade as well as Dick Sequerra's ribbon tweeter, I usually listened near field. They used basically the large Advent style woofer and the stock cheap piezo was problematic.
I would not call them "accurate" but they gave one of the best simulations I have heard and still miss them at times.
I would not call them "accurate" but they gave one of the best simulations I have heard and still miss them at times.
I feel this interesting post deserves a reply............ the only thing that springs to mind is a strange kind of wonder.......how would it effect toxic music with toxic words written by a toxic mind and listened to by a toxic person having toxic thoughts?...........
No, it isn't interesting & no it doesn't deserve a reply - sorry to say
Hi Ed
Most intriguing post, for the reason it comes from you.
Had you chosen speakers of different directivity pattern and had decided in near field listening scenario, you would have needed some kW of amplification per your calculations.
You have plenty of first hand experience with high or controlled directivity speakers, high power amplifiers, DSP augmentation and realistic SPL playback levels.
You certainly have no "accessibility" issues for such systems had you wanted to use them at home .
My question is why you went the other route for your home audio system?
Thanks in advance
George
Two large Advents stacked on top of each other really did it for me in the same way.
George,
On my large systems speech intelligibilty is the primary concern.
At a concert I have spent more time backstage than front of house.
Folk and small group classical music is what I would use the DQ-10s for.
One of the great bits of humor here is the wide variety of opinions on perceived sound quality. Much of this is sort of strongly hinted at by Fletcher and Munsons work. Folks who listen to louder music often complain of lack of bass response from actually quite flat energy response loudspeakers playing other varieties of music at lower volumes.
Did a stadium once or twice where the local operators were recording studio types. Not a good thing to leave them in charge of the tunings!
Figure for 40++ years I have listened to what is called an acoustic event every week. Also have heard a bit of amplified live performances. Surprisingly they don't sound the same.
On my large systems speech intelligibilty is the primary concern.
At a concert I have spent more time backstage than front of house.
Folk and small group classical music is what I would use the DQ-10s for.
One of the great bits of humor here is the wide variety of opinions on perceived sound quality. Much of this is sort of strongly hinted at by Fletcher and Munsons work. Folks who listen to louder music often complain of lack of bass response from actually quite flat energy response loudspeakers playing other varieties of music at lower volumes.
Did a stadium once or twice where the local operators were recording studio types. Not a good thing to leave them in charge of the tunings!
Figure for 40++ years I have listened to what is called an acoustic event every week. Also have heard a bit of amplified live performances. Surprisingly they don't sound the same.
Ed, yes.
I have formed the opinion that you have a respectable amount of experience in acoustics both as a professional as well as a listener (one enriches the qualities of the other).
That’s why I asked the question what makes you go for a low power amp driving a wide/non controlled directivity speaker, no DSP for far field listening in a not heavily treated acoustic space at home, although you have the knowledge to properly choose to go all the way differently.
George
I have formed the opinion that you have a respectable amount of experience in acoustics both as a professional as well as a listener (one enriches the qualities of the other).
That’s why I asked the question what makes you go for a low power amp driving a wide/non controlled directivity speaker, no DSP for far field listening in a not heavily treated acoustic space at home, although you have the knowledge to properly choose to go all the way differently.
George
I enchanted a young lady once with Inti-Illimani playing the "Flight of the Condor" theme YouTube. OTOH David Lewiston's Tibetan field recordings at their most cacophonous were very pleasing too.
Don't get your drift here, they imaged an over the air broadcast by Victor Campos like nothing I ever heard before or since. This was FM radio through 80's electronics. Around this time a $50k Thiel/Cello setup drove me out of the room.
My anecdotal subjective experiences from distant memory are as valid as anyone else's. The great pile of metadata.
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