Paul S wrote:

Am I the only one who wonders about parking the amps on the woofers?

ArmAlex wrote:

Hi Romy, In this picture it looks that attic opening's distance to listening position is very close to distance of chair to the main speakers. Time alignment?

Happy Birthday and Congratulations, Romy! Nice to hear you took the “me time” and you’re getting the results you’ve been after for so long. When you talked about Bruckner’s long expositions and the “almost” feeling you get, I may not know exactly what you mean, but I could use similar words to describe my own sense of it, not so long ago.  You fingered the Vitavox, and that frequency range, and I think you might be on to something. Of course you did not put a “horn Vitavox” in a box, right? Might be that Bruckner’s “sneaky volume” has caught you off guard. Is it possible that the Vitavox in boxes are not quite keeping up with your 110 dB horns? It seems to me that these “crescendos” require power “beyond SPL”, but they also require “perfect resolution” to be “adequately expressed”, at least this is so for me, at this point, anyway. That big, open room will eat a LOT of system power… I hesitate to suggest solutions, such as doubling the Vitavox, because, of course, every “solution” introduces new problems. If the issue goes up into the big horn, there’s that, too, at least the tie-in.>>

Best regards,

Paul S

anthony wrote:

Turns out the Red 10" pair I purchased from fleabay years ago that were sold as "original" but in fact were re-coned (and not with Tannoy cones) are actually useful now.  Got a partial refund for that dodgy transaction and ended up only paying for the tweeters...lucky it was too expensive to have them sent back overseas or they would not be here.  Romy, once you nail down the specs for the Red tweeter I will happily give it a go, but am dubious about the VFET amps and would much rather a Melquiades solution.  I'm thinking perhaps another DHT channel assuming existing two stage or single stage Melq channels are not enough.

anthony wrote:

Looks like the Red 10's are circa 92dB/w/m as an entire "speaker" including woofer.  I've never played with them before, but I wonder how much, if any, SPL is scrubbed from the tweeter by the crossover so that it matches the woofer.  Romy, from what I can tell you are using the Pepper Pot via the standard Tannoy crossover, and if so then I can perhaps understand why Melquiades does not like them ay 92dB sensitivity.  If the crossover is attenuating the tweeter then perhaps the Melq will perform better without the default crossover in play.  Of course I can figure this out myself by diving into my attic to haul down my pair but this may be something you have already investigated...not sure. The B3 amp is nothing special based on specifications, and indeed has a high output impedance for a SS amp that is quite similar to a fullrange Melquiades channel, not that damping factor should really matter for a tweeter.  I've been unable to find gain of the B3 amplifiers.  Perhaps the B3/Pepper Pot just works because of the 70w of power matched with a 92dB/w/m sensitivity speaker, but it is only capable of 6dB more output than fullrange Melq assuming gain is similar.  Melq will drive the tweeter via the crossover to perhaps 104dB at 16w (say 101dB at chair) whereas the B3 will drive to 110dB at 64w (say 107dB at chair). That and B3 full output is as 1Vrms whereas Melq is cira 4Vrms. Romy, have you tried the Red tweeter without the standard crossover and does sensitivity improve?  Sounds to me like the problem with Melq...just working too hard to get any volume.