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For efficient speakers, how much difference does an amp really make?

I have ascend sierra RAAL tower speakers with 90-93db efficiency and 300W continuous power handling. I’m powering them with dual outlaw M2200 monoblock class AB/G amps rated at 200W into 8 ohms. It sounds good...but i can’t help but wondering if a different amp would provide greater clarity and low-end grunt.

I have been curious about an older adcom amp like the GFA-555 II or perhaps a parasound halo amp like the A23. 

To those who have had multiple amps in your setup, did you find significant sonic differences between amps, or is a subtle thing? I don’t want to start collecting amps, but I don’t want to deny myself the chance to improve my system further. Thoughts?
dtrandall

Showing 2 responses by verdantaudio

verdantaudio's avatar
verdantaudio
1,528 posts
 
amps make a huge difference.  don't obsess about power ratings.  I use 45w to drive speakers with an SPL of 84dB at trade shows (in 13 x 20 rooms) and at the end of the day my ears ring.  

Quality over quantity assuming you meet the minimum needs for the listening environment you are in. 
verdantaudio's avatar
verdantaudio
1,528 posts
 
Current is king. An amp that is comfortable at 4 ohms and stable to 2 ohms will be able to drive those with authority. An amp that is stable at 4 ohms and nothing below will likely sound thin as volume increase. I had this problem in the past with an integrated that was 4 ohm stable but not really happy there and with a power amp.  
At the time I upgrade to a Rogue Hydra (100w class D and doubles output down to 2 ohms) and my speakers came to life.

Because I import Art Audio, I brought in a pair of $17K mono-blocks and not shockingly, they have plenty of current to handle my lower impedance speaker.  

many manufacturers put in a power supply that delivers a big number into 8 ohms but won’t be up to the task as impedance drops. 
At times you can find that Hydra in the $1500 to $1800 range.  A stereo 100 which will have 50w in triode, 100w in ultra-Linear would be another great choice for hybrid and tube gear.  
For Solid State, Musical Fidelity is a strong value and does well at 4 ohms.  If you can find a used M6 PRX, they are amazing.  A new one is $2300 I think.  The older ones were $3K.
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