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In the Forum: Horn-Loaded Speakers
In the Thread: Another time aligned 5-way horn project
Post Subject: Welcome to the club....Posted by Romy the Cat on: 8/13/2015
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 Murataltuev wrote:
I understand all disadvantages going digital. 
I strongly believe that minimal influence to the signal is the most important aspect. And influences in digital domain are usually terrible. But I'm not sure what other options available. I like tapped horn, because in working range 20-50hz single 15" diaphragm displacement is in 2mm range...and sensitivity is enough to drive it by SET amp. And nothing can be compared with SET driving even lowest bass!

Possible. I am not well familiar with tapped horns and nave no acquired test in them.
 Murataltuev wrote:
I had an experiment in my room comparing the best 2000W D-class and 500W AB-class transistor amps with 18W SET and even on cinema tracks choice was obvious.
I wonder if you feel it then how come that you proposed to go with digital filtration for bass channel? Most of the re-processing line level digital distracts LF much more than any D-class amp.
 Murataltuev wrote:
I don't clearly understand how you get your 20-50hz range driving by SET. Difficult to believe that relatively small drivers in sealed enclosures can do it.

Well, this is the question for sure. To a degree it is depends of what the size of your room. If you have let say sub 400 sq. feet then having sealed enclosures with mid 90dB sensitivity you can go away with 15-30W of SET power. Of you have larger room or of you room has open plan floor (it means at 20Hz the room will dissipate good 100-150W of power then the flimsy SET would not do well and you need to go for high power transmitting tubes and paralleling of your output tubes (if you believe in paralleling). Any topology, would you chose line array or tapped horns will have own cons and pros, it is all about how you put it all together. Do not forget that you run your channel 20-50hz but 50hz and 20hz are very different frequencies. I would say that SS amps would have a LOT of difficulty to compete at 50hz with a good SET but they will have much better time at 20hz. I run SS amp from 20Hz and down and I compliment it with an external crossover that infuse a LOT of second harmonics into Sound. I certainly not a model for imitation but from how I feel it “does” work. Would I go for 200W pure SET if I had it? Absolutely yes…. but I do not have it. Would I invest a few thousand dollars and a few month to build a DSET around let say Eimac 450TH or GU-48? Theoretically I would but not now and I have some other properties now.  I have at my site some wet fantasies about the subject, the threads “How to get a LOT of SET power” and “More power from Melquiades? More powerful tube?” but they did not go further than just talking.
   
So, I do not answer your question if any alternative to tapped horn. Primary it is because I do not know the answer and secondary is because I do not hold a tapped horn as some kind of epicenter of my attention. You use the tapped horn, so you make it to sound right and get from there. If after you make it to sound its best you do not like the result then you can go to something else…
 

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