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Need some Amp help - a little new to properly powering speakers

Hello. 

 I have some polk LSIM707s that I thorough enjoy.

However, at the moment I'm powering them using a Yamaha aventage 3070 receiver which at 150 watts at 8ohms sounds pretty darn good. 

However, since these are rated at 300 watts at 8 Ohms, I assume I will need some more power. I notice at lower volumes a lot of the imaging and clarity disappears. 

I am looking at buying a 300 watt emotiva Amplifier, or a 500 watt emotiva amplifier.

I'm assuming it would be better to purchase the 500 watt per channel emotiva so the speakers won't suck it dry or stress it. 

Am i wrong in this assumption? 
moskaudio

Showing 1 response by georgehifi

georgehifi's avatar
georgehifi
10,312 posts
 
moskaudio

 Impedance reaches a minimum of 3.75 ohms at 66 Hz and a phase angle of –47.96 degrees at 83 Hz.
Read more at https://www.soundandvision.com/content/polk-lsim707-surround-speaker-system-ht-labs-measures#fIW7rJB...
This indicates for them to sound their best in the bass, an amp that has good current delivery <100hz.
A good solid state amp that can keep increasing it’s wattage for every halving of impedance, is an indication that it can deliver current.

EG: A theoretically prefect amp that delivers current, none can do these prefect figures in real life, but some get close.
8ohm 50w
4ohm 100w
2ohm 200w

Cheers George
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