What Class D amps will drive a 2 ohm load

joysjane,

I do not know what more to say about the ST1000. I read great things about the amp before I bought mine.

The ST1000 played loud but was lacking in dynamics and sounded bland.

I was astonished how much better the Maggie's and Thiels sounded with good class AB amps. 

A learning point for me from this thread is that it appears there are no standardized measurements for current and damping factor.

That is one reason why I like the Stereophile test measurements as they can help you to understand about a specific amp. Problem was the ST1000 was not reviewed by them and I could not find test measurements elsewhere.

Thanks for  listening,

Dsper

A learning point for me from this thread is that it appears there are no standardized measurements for current and damping factor.

@dsper This statement is tricky. But you are on to something - they can be misleading. 'Current' is the one that is bandied about the most and it can quite often be meaningless. Take a look at this link (which is an easy read) for why:http://www.atma-sphere.com/Resources/Common_Amplifier_Myths.php
Now damping factor is the output impedance vs 8 ohms and is expressed as a ratio (IOW its standardized). What is less understood is that speakers require a certain amount of damping and that varies by design, even if the same drivers are used in a different box. Some speakers (certain open baffles for example) seem to work better if the damping factor is extremely low- 1/10th :1; and some speakers need as high as 20:1. No speaker needs more damping than that; higher damping factors are often deleterious to neutrality.


Amplifier designers thus have a challenge- from their perspective a lower output impedance is good to insure that the amplifier has the proper 'voltage source' response which is to say that it can maintain a constant voltage output regardless of load. And speaker designers are **usually** expecting this too- but they are working with drivers that quite simply don't work right if they are overdamped!


So its no surprise that confusion exists- because you can easily hear when the speaker is overdamped ('tight bass' being a symptom; while many audiophiles like this, it is in fact a coloration). It makes the right amp/speaker combination a lot harder than you would think and a lot harder than it supposed to be!

That is one reason why I like the Stereophile test measurements as they can help you to understand about a specific amp.

👍 yep, don’t listen to some of the manufacturers voodoo BS, they’re in sales mode and you know about car/real estate salesmen, you could almost group these guys in the same category

Won't be able to find out if the SX-1000's would power my speakers.
The deal fell through.

Was really looking forward to see if it would have been able to drive my Kappa 9 speakers

Oh well, I'll carry on...

joysjane

Won't be able to find out if the SX-1000's would power my speakers.
The deal fell through.

I say lucky you, that was to me was more divine intervention.

Cheers George