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Check out these line source speakers!!

www.transmissionaudio.com

The M3 pro from this company costs $28,000 and is using a ribbon for most of the mids and highs with active xover. Much more advanced design than this russel speaker IMO and likely to sound better with a much higher dynamic headroom (not to mention 96 db/watt).

The M5 is around $40K.

They also make a TRUE ribbon full-range speaker called the La Scalla but it runs $50K.

Also http://www.relcoaudio.it/Relco_ing/davinci.htm

This is a ribbon hybrid fully dipole system. Costs about $24,000. 90db sensitivity.

Both are around 2 meters tall

Then if you want full-range single driver line source then you need to look at these:

http://www.izzy-wizzy.com/audio/spkrframe.html

This is an Acoustat 1+1. It has two identical panels stacked on top of each other to make a 94 inch tall (2.35 meters) line source full-range electrostatic speaker. Acoustat also made a 2+2 (2 down and 2 up), a 3+3 and a 4+4

Later generations used the same panels but improved interfaces (better transparency and tonal color...or lack thereof) and are the 4400 (again 2 up and 2 down) and the 6600 (an updated 3+3).

True linesources with seamless full-range to 20Khz can only be done with electrostatic elements because they can do the 20Khz with decent dispersion (if the panel is not too wide or if the panel is electronicall segmented)

I have Acoustat 1+1s and Spectra 2200 (a 2 panel wide model that is 1.7 meters tall).

The best part: you can find 1+1 and 2+2 for around $1000!!! So if you really want to try a line source speaker this is by far the cheapest and possibly best sounding options. OH, I forgot they work just fine with about 30 watts of tube power so your Mastersound SETs will love them.


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