High efficiency is critical.


I am looking to move on from my Klipsch Heresy speakers. I have a 2A3 power amp so high efficiency is critical. My budget is somewhere around $1500-$3000. Opinions and experiences welcome. 
fromunda

Showing 1 response by jdl57

If you can do some woodworking:
 http://lampizator.eu/SPEAKERS/PROJECTS/P17/Endorphine%20from%20Kingston%20Kitchen.html

Here is the current version: https://www.fikuselectric.com

The new one uses a Dayton Audio PS220-8 8" Point Source Full-Range Neo Driver (FE removes the whizzer), an ATC 18", which I couldn't find, and a very expensive RAAL dipole tweeter. Crossover at 700hz and 3500hz. I used a pair of Altec 515b, Altec 755a and the RAAL. I did buy a pair of the Daytons, but the 755a sounds better. I already had the Altecs. I am powering it with 2, 45 SETs and a DIYaudio Amp Camp Amp single ended 8 watt transistor amp. I was using three 45 amps in a triamp configuration, active crossover, until I discovered that what I thought was cone rubbing on my 755s, was actually the amp freaking out at the 4 or less ohm impedance of the 755s. I don't have a 4 ohm tap on my transformers, and the ACA sounds single ended and doesn't care about the low impedance. The RAAL is the lowest efficiency at 93db/w/m. The others are 102 for the 515 and 106 for the 755. The Daytons are 96. 755a speakers are now obscenely expensive if you can even find a pair. I bought mine 20 years ago.

These speakers have no horn coloration, no box coloration, are flat from 30hz to 30khz, and sound so nice you never want to go to bed at night. If they fall down at anything, they don't image as well as I would like. If you use the RAAL dipole tweeters with the Altec woofers, they work very nicely as a two way, (and image much better), crossed at 1600hz. The Daytons however are only $100 each right now at Parts Express. I bought my RAALs from Solen at $1600 for the pair. These speakers have once again realigned what I thought I knew about hi-fi. My first SET amp was the last (very) major shakeup. I bought the 755s for that amp, and ran them full range, not knowing at the time, or even until last month, they really weren't compatible. My Sound Lab electrostatics, which have been my reference for 30 years, now sit mostly unused.

SETs are worth the effort, good luck in your search.