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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
atdavid
736 posts
 
You are applying criteria that could be used as a measure of a Linear amplifier to a Class-D amplifier which can current limit cycle by cycle, hence the current limit and power limit of a Class-D amplifier can be decoupled rendering your statement irrelevant depending on the Class-D implementation.


It needs to be able to almost double it’s "full" rms wattage for each halving of impedance, from 8 to 4 and from 4 to 2ohms, and I asked Merrill twice, to supply that, and twice the question wasn’t answered.

golfnutz
231 posts
 
OK, so what is the definition of instability for these Class-D amplifiers? Since they have over current protection mode, and soft clipping capabilities the amp continues to operate, but not optimally. Without the use of an LED display to the circuit board (1200AS2 has this option), how would you even know it’s happening - is bad sound is the only way? Again, since the amp is running and making music, would this indicate it’s stable?
atdavid
736 posts
 
Many class-D amplifiers have feedback so could have similar instability as a typical linear amplifier.
georgehifi's avatar
georgehifi
10,312 posts
 
dsper
Back to the OP’s question
What Class D amps will drive a 2 ohm load into his Thiel CS5’s

The proof is in the two posts done here, about Class-D and it’s ability to perform/drive "optimally" into hard loads full range, (not just to be stable!!) even with one of those speakers being very efficient at over 90db!!!

joysjane
https://forum.audiogon.com/discussions/what-class-d-amps-will-drive-a-2-ohm-load/post?postid=1838669...

golfnutz
https://forum.audiogon.com/discussions/what-class-d-amps-will-drive-a-2-ohm-load/post?postid=1838728...

When are the Class-D spruikers going to stop trying to push them like they’re the total answer to amplification, and sell them for what they are, good for easy/medium loads and not hi-end "yet", like Agostino, Gryphon, Solution, Boulder ect ect for driving the types of speaker discussed here, and the topic of this thread!!!!!!!

Cheers George
nitrobob
249 posts
 

You guys have me thinking. I’m not at all on your level of knowledge.
So now is a good time for me to throw this out there. I have Legacy Focus mains, with Legacy Marquis center and a nice pair of Ascend Acoustics Sierra 2 raal surrounds. Couple of 18 inch subs also. We do up some video concerts while entertaining, classic rock mainly, and volumes stray up over 110 db ( at 10 feet ). The sound in that room is phenomenal. I had a new ATI Signature 6005 series amp, and occasionally the right channel would just quit. I called ATI. They were really nice about it and explained that probably the Legacy’s were dropping below 2 ohms and tripping the channel. ATI then called Legacy and found out that they indeed did go down to 3 during certain conditions. ATI replaced the board with one that could take more punishment, no questions ask. Here’s my question. Legacy has just released their "V" series amps. They are D series with Ice technology. It's double the output of my ATI. 600 verses 300 per channel . It sounds like a perfect fit to me. Any drawbacks ? Please don’t scold me on the effects of loud listening. I’m 64, been racing cars and enjoying loud hobbies my entire life. Too late to cradle myself now .. Thanks for any input.

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