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100 watts enough?

Hi all.  I'm contemplating purchasing a CH Precision A1 and I don't know if it will drive my speakers adequately.  I have EgglestonWorks Andra III speakers which are 88db efficient (impedance 8 ohms nominal, 6 ohms minimal).  I have a 30x20ft  room and I sit about 14ft from the speakers.  I live in a condo and have almost nothing between me and my neighbor so I don't ever crank up the volume.  I use a VAC Renaissance preamp that I almost never crank past 9 o'clock.  The Andra III is a speaker that likes lots of power to open up.  So what do you think?
robal

Showing 3 responses by jjss49

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jjss49
6,612 posts
 
it is of course in the eye of the beholder, but i have considered the following over time as reasonable descriptions

below 86 db / w / m -- inefficient
87-89 db -- moderately efficient
90-92 db -- efficient
93 db and up -- very efficient

impedance and nature of reactivity of the speaker load figures in too ( eg -- an 'efficient' load of 90 db at 3.5 ohms impedance still may not be easy for certain amps to drive)... but based on the simple measure of db/w/m above that is a simplistic and proper ranging imo
jjss49's avatar
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jjss49
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@robal
The VAC preamp has a lot of gain (almost too much), which is why I can’t go past 9-10 o’clock on most recordings.

don’t conflate preamp output voltage with receiving power amplifier power/capability

frequent noob mistake... often with unfortunate consequences

just because the gas pedal in car a is more sensitive than car b doesn’t make it more powerful
jjss49's avatar
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jjss49
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i don't know the amp, but based on the power rating and the andra's specs as a driven load, it should work fine -- unless you play the music very very loud

but really no way to know for sure for yourself until you try it!
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