Amps stable down to 1ohm or below...

Mike

Mike

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For difficult impedance dip speakers like Martin Logan and some other electrostatic speakers, what are some amps that are stable down to 1ohm (or below)?

I would assume amps with a Bipolar output stage are going to have the edge over MOSFET/JFET output stages.

I’m guessing a few are:

* Gryphon
* Luxman
* Accuphase
* Soulution
* CH
* Bryston
* D’Ag
* SimAudio??

Any others come to mind?

Class D and Tube amps need not apply?
 
Jack said:
Coda as they appear to be the OEM for Sanders.
Click to expand...

Coda is not the OEM for Sanders. Roger told me they manufacture their own amplifiers. From the website:

"Speakers and Electronics are manufactured in Conifer, Colorado."
 
Coda does act as an OEM designer and/or manufacturer for several brands of high end electronics. The products they design for other brands are often customized in specific ways and differ from Coda branded products in order to best meet the needs of the other company. If you look at the design and construction of Coda amps and preamps and compare them to those from Sanders and Legacy for example there are many obvious similarities which are beyond coincidental. So Sanders claim to manufacture their own amps may indeed be true, but their design is apparently at some level associated with Coda. It's possible that Coda could be hired as a design consultant by Sanders for their amplifiers and that would still allow them to be manufactured by Sanders in Colorado.
 
kiwi_1282001 said:
+1. I also believe this.

For its part, Sanders modifies the Coda design to suit its philosophy and goals - the fully regulated PSU being one example.
Click to expand...
Absolutely, there are unique and brand specific changes made to the designs Coda assists with. I didn't mean to imply that any of the other branded amps were identical and simply re-branded Coda amps.
 
Coda makes excellent products at relative bargain prices. Principals worked with Nelson Pass at Threshold back in the day. My understanding is that they sell more overseas than here in the U.S. and that they like to develop and build more than market.
 
Ok, OTHER than Coda?

Luxman is looking like a good option.


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I would have thought Pass since he began building amps with the intent to drive his own speaker.

I don't know about Krell of today but definitely Krell of the earlier. I knew of a guy who used them to drive Apogees.

What about ATI. Those amps are beasts, even requiring two power cords with 20 amp ends.

I know tubes typically need not apply but the guy with the Apogees went to some tube amp called NAT he said drove them, anyone know of them?
 
NAT is a manufacturer from Serbia.

They are well lauded for tube amps, e.g. the NAT Symmetrical preamp an the NAT Transmitter power amp.


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fm acoustics 115:

operating with music or continuous toneburst:
550 Wpeak into 8 Ohm
1000 Wpeak into 4 Ohm
1800 Wpeak into 2 Ohm

275 WRMS into 8 Ohm
500 WRMS into 4 Ohm
900 WRMS into 2 Ohm

Max. Output Current:
Unlimited repetitive peak output current. More than 35 A continuous. No output or DC fuses, absolutely no form of current-, voltage- or any other kind of limiting.

Load Impedance:
No minimum impedance.
The amplifier is designed for 1 Ohm to 10’000 Ohm systems.
It can drive any speaker impedance (even below 1 Ohm) with dynamic (music) signals without any limiting, compression or other negative effects on the audio signal.
Despite this, the amplifier is fully protected against short circuits, open circuits and all other adverse conditions via unique onboard circuitry that continuously surveys all important parameters.

https://www.audiolimits.com/Helix-turntable/PRODUCTS/FM-Acoustics/fm-acoustics.html
 
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