I have owned Electrostatics, how about 3 to 100 ohm impedance curve !
That's why you need a 355 watt per channel amp and tubes do better with high impedance than SS. when running huge panels.
I have owned Electrostatics, how about 3 to 100 ohm impedance curve !
That's why you need a 355 watt per channel amp and tubes do better with high impedance than SS. when running huge panels.
Jeff :UBERTHREADKILLER
Actually tubes prefer a low impedance as a high one can upset them serioiusly Solid state stuff doesnt mind an open circuit & doesn't like too low an impedance.
So you kind of have it arse about face Jeff, or backwards if you like
Never connect a valve amp up with no speaker or load. A solid state amp wouldn't give a toss
Bests, Mark
"We must believe in free will. We have no choice" Isaac Bashevis Singer
Well to be 100% truthful it depends on the amp in question Without knowing the tube amp design you won't know if it's safe to work with little or no load, so the safest thing to do is assume that it won't be & give it a proper load
Bests, Mark
"We must believe in free will. We have no choice" Isaac Bashevis Singer
They would have to be some pretty big frickin tubes to drive a massive pair of panels single ended!
Jeff :UBERTHREADKILLER
That sales guy wasn't a total loony
"High Impedance" in most speaker cases is around 12 - 15 ohms and this average suits "typical" valve amps really well, as below 8 ohms or so, the higher output impedance of the output transformers may become an issue I understand - unless you are lucky enough to have some Radfords, which were superb in this respect.. Makes a great case for active drive, where modern electronic crossovers can be designed quite easily and have far less interaction than a typical passive crossover..
Having said that - Jeff, have a look at the Tekton site. The M-Lore's look really promising, as they appear on face value to measure properly, have incredibly high efficiency and are cheap to buy if you're US based - getting 'em here a pair at a time doubles the price sadly.. I believe they use Eminence and Fostex drivers to good effect in a variety of designs
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I'm Colin.
Yes and no.They would have to be some pretty big frickin tubes to drive a massive pair of panels single ended!
However, you do need to use DHT transmitter valves of the likes 211, GM70.
I use SET GM70 monoblocks to drive my Quad ESL63's. 35 Watts from a single GM70 and that's running them quite mild at around 1200 Volts. Not for the faint hearted. But they don't half sound good.
Reid Malenfant wroteOne very good reason for Single fullrange driver speakers like Back Loaded Horns etc. NO CROSSOVER! The signal is fed direct to the driver from the amp, so no colouration of the signal by the XO components.Quote:
Originally Posted by goraman View Post
It seems a miracle speaker crossovers work at all.
What alot going on for so few parts.
Jeff it gets worse as no drive unit has a fixed impedance, they all vary all over the place as well which can bugger up the crossover frequency & driver phase. As you can imagine this make things more complicated
& just to make things even worse the driver sensitivity varies over frequency as well
So yeah, it's a minefield out there
Bests, Mark
"We must believe in free will. We have no choice" Isaac Bashevis Singer