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Dynamic
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New Martin Logan Electromotions 2ohm load

Hello Everyone, I finaly got my Electromotions wich for me is a really high price to pay for speakers but I really wanted them after I heard them at best buy magnolia running on pure Mcintosh amps . Before Highest prices speakers I bought were below 300.

I read reviews and noticed that these drop from 6ohms to 2ohms while playing so I decided to buy a QSC 1450 AMP wich promises studio like quality signal , This amp drops to 2ohms but like always it never gets reviewed by big sites like this.

My Question: Are there any AvReceivers that have integrated amps that drop down to 2ohms?

jackfish
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It would be the loudspeakers that present the amplifier with

a 2 Ohm load. It then is a matter if the amplifier can provide sufficient current at that impedance.

The QSC amp is a pro audio amp, and while it may be advertised to deliver "studio-like quality", it is not considered a high fidelity amplifier. That's why you won't find it reviewed in hi-fi, stereo or audiophile magazines/websites. It can handle a 2 Ohm load because it is designed for professional sound reinforcement for live performance venues which often have speaker stacks presenting 2 Ohm loads.

Quote:

My Question: Are there any AvReceivers that have integrated amps that drop down to 2ohms?

Not likely. Sounds like you will need outboard amplification. You have that with the QSC. However, you'll need a preamp, or AV receiver with pre-amp outputs.

The Martin Logan ElectroMotion ESL present a nominal 6 Ohm load and drop to a 1.3 Ohm at only extremely high frequencies. The current required to reproduce these frequencies is significantly less than that required for lower frequencies. Any amplifier with ample power that can handle a 4 Ohm load should be fine with these speakers.

Dynamic
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Thanks I kinda

Thanks I kinda Figured.

Current Setup :

Asus Xonar ST - +3db boost @ 250hz +1db boost @ 16khz

Marantz 4002 - pure direct

Qsc 1450 -

 

Yes one site says they drop down to 1.2 Hometheatermag wich is this sites brother says it drops down to 2.1 - I didnt want to risk burning my Marantz ;'( so I had to find this amp. It doenst seem to degrade the sound quality - Ive tested Adel - Keny Rogers - Eagles 'hotel california song' .  I think my next step is go to go Magnolia and compare my setup to the B&W Diamonds and see how close I can come to them.

commsysman
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AMPLIFIER

I would not use that amplifier. 

That is a low-quality amplifier intended for PA use.

I suggest that you look at the Music Hall A70.2 amplifier, which will handle that load easily and sound 300% better.

 

 

 

Dynamic wrote:

Hello Everyone, I finaly got my Electromotions wich for me is a really high price to pay for speakers but I really wanted them after I heard them at best buy magnolia running on pure Mcintosh amps . Before Highest prices speakers I bought were below 300. I read reviews and noticed that these drop from 6ohms to 2ohms while playing so I decided to buy a QSC 1450 AMP wich promises studio like quality signal , This amp drops to 2ohms but like always it never gets reviewed by big sites like this. My Question: Are there any AvReceivers that have integrated amps that drop down to 2ohms?

mrvco
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I recommend heading over to

I recommend heading over to Sanders Sound Systems and reading his "ESL Amp White Paper" for a better understanding of ESL's and what it takes to drive them.

http://www.sanderssoundsystems.com/technical-white-papers/esl-amp-wp

 

And I'd make sure that trying to get your MartinLogans ESL's to sound like a pair of B&W Diamonds (a traditional magnetic speaker design) is the right path to head down versus trying recreate the environment that sold you on the MartinLogans to begin with or finding a less expensive alternative to the B&W Diamonds.

JoeE SP9
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ML

Martin Logan Electromotion speakers are not esl's. The tweeter they use is a variation of the Heil tweeter. There is nothing electrostatic about any of the speakers in the Electromotion series.

The Electromotion series is suitable for use by most AV receivers. As has already been posted, the impedance dip is at a frequency extreme and will not appreciably effect the performance of the amplifier. The entire series is aimed at the receiver/integrated amplifier market. Martin Logan would hardly make and sell a line of speakers aimed at receiver/integrated amplifier owners if they would cause problems with those devices. Even their true esl's work quite well with garden variety receivers and integrated amplifiers.

IMO, you are making an issue out of a non-issue. This is an instance where taking too much interest in specs is causing unnecessary concern.

mrvco
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ElectroMotion ESL's aren't

ElectroMotion ESL's aren't ESL's?

http://www.martinlogan.com/electromotion/index.php

JoeE SP9
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No

In the Electromotion series only one model (the highest priced one) is an electrostatic. The rest use ML's variation on the Heil Air Motion Transformer.

mrvco
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Interesting... The only

Interesting...

The only non-ESL Electromotion speakers I see on ML's website are the center, surrounds and the in-wall speakers.

JoeE SP9
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only one

Only one speaker in the entire series is an esl. 

mrvco
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Exactly, so unless he was

Exactly, so unless he was using centers, surrounds, or in-wall speakers as his main R/L speakers, then he must be using the ESL's.

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