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  3. 150690-2029

What Class D amps will drive a 2 ohm load

Just asking.

I see specs into 4 ohms but nothing into difficult speaker loads (like Thiel CS5's).

Thanks for listening, 

Dsper


dsper
golfnutz
231 posts
 

@viber6 - no need to get defensive about your Mytek Brooklyn amp. No where did I mention anything about quality of sound from any amp. My comments were specific to mcreyn's question to George.

I would also like to add, my post has everything to do with the question asked about Class-D amps for 2 ohm speakers (from the OP), as the Manufacture specs do not align with the measurements from Stereophile. And I'll repeat it again, 'this is George's point about Class-D amps not being suitable for low impedance speakers - make sure they measure as the specs suggest because more often than not, Stereophile mentions the amp will have a hard time with low impedance speakers."

Please don't twist my words around again and make this into something it isn't.

viber6
2,448 posts
 
golfnutz,
In my post, I was not defensive about my Mytek Brooklyn amp.  I thanked you for quoting Stereophile measurements whose power capabilities are at odds with the excellent sound quality described in the review and confirmed by my listening.  My "SO WHAT" comment was intended to refute George who holds up the Levinson ML2 as the paragon of excellence for technical specs.  The truth is that it sounds like muddy molasses at any SPL despite its power specs.  But George has never heard it, doesn't care to listen, and merely goes on and on about irrelevant technical subjects.

As to your point about the usefulness of independent measurements, I agree.
atmasphere's avatar
atmasphere
11,800 posts
 
You’ve now got to be joking!!, out of courtesy I didn’t mention which OTL’s wouldn’t drive these 89db JBL’s 1400’s, but now you leave me no option, they were a pair of your M60’s!!!!! and now your saying they’ll do a nice job on Wilson Alexia!!!
MA-1s. Not joking- Wilsons have always been fairly efficient despite their impedance. They seemed to sound just fine to me. They played loud enough too but it was a smaller room IME. We also noted that particular customer was going through power tubes faster, which is no surprise since a lower impedance will cause more of the power generated by the output section to be dissipated in the output section- and that's hard on tubes. We finally got him to install a pair of ZEROs and then the tubes stopped failing, plus he had more power. The Wilsons traditionally have been fairly efficient so none of this should come as any surprise. The national sales manager at Wilson (John Giolas) had our amps for several years.
georgehifi's avatar
georgehifi
10,312 posts
 
We finally got him to install a pair of ZERO

This is just trying to save face.

Of course you did, an expensive band-aid fix, that will never get the best from the Alexia, instead of pointing him in the right direction for the right amp even at the cost of maybe an OTL sale.

This Wilson Alexia "customer", was sold totally wrong amp for these speakers that have a pig of a load. That with the right amp eg: Gryphon Antilion and similar current pushing demons, will make them sing at all levels.

I know as my friend Edgar Kramer owner of Soundstage Australia, owns a pair, and we’ve tried many amps on them, believe me "NO OTL" will drive them anywhere near their full potential, even with a Zero autoformer.
https://www.soundstageaustralia.com/index.php/reviews/84-wilson-audio-specialties-alexia-series-2-loudspeakers


John Atkinson Stereophile Test
This speaker will play loudly with just a few watts. However, it demands quite a lot of current from the partnering amplifier.

HiFi News Lab Report
The impedance and phase angles falls to a scary 0.9ohm!! in the lower bass


Now back on topic to the OP’s problem of driving his Thiel CS5’s which maybe an even worse/similar load as these Wilson Alexia’s.

"Here's a thought!! maybe the OP needs some OTL’s"???????????
gdnrbob
4,444 posts
 
@georgehifi , 
Can you just drop down the level of sarcasm and argumentativeness a couple of notches?

Bob
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