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In the Forum: Horn-Loaded Speakers
In the Thread: Macondo 3.0
Post Subject: Shake the Pepper PotPosted by anthony on: 7/12/2023
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.
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