Speakers Nominal Power handling/Amplifier


My Canton k9  bookshelf speakers have a nominal power handling of 120/200 watts,  SPL of 87db my Technic integrated amp SU-G700 has 70 watts into 8 ohms,140 into 4 ohms.  As an aside, my source is a Marantzcd6006  CD player.
What does Nominal power mean for me in terms of music reproduction in my system? Specifically Will the speakers perform to there potential with my 70 watt amp? I read that nominal power relates to the power your amp should have to drive these speakers. So what am I missing with only 70 watts per channel besides playing louder? what would an amp with 120 to 200 watts give  the speakers that would improve the music? Am I placing my speakers at risk using less power then what the speakers can handle?
I'm a rookie with zip, zero, nada, listening experience to fall back on that is at all relevant so take this with a grain of salt I freakin love the sound detailed(decay of strings and brushes on symbols, fingers plucking guitar strings etc) soundstage( speakers vanish instruments are here there everywhere but not outside of speaker footprint and not real deep front to back )imaging ( instruments have there own place voices are in the center) not harsh or bright but detailed not warm sounding. How much better could it get with a more powerful amp? I can only imagine what a high-end system must sound like!
An observation no audio stores are within 50 miles, unless I count BestBuy so I sadly I must rely on reviews for the most part and what I read here. Regards Scott
scott22

Showing 1 response by millercarbon

Forget nominal power, it is a waste and a distraction. What maters is sensitivity. 

At only 87dB those speakers are very inefficient and a bad choice for that reason alone. This is because power requirements increase exponentially with volume. A mere 3dB increase in volume, barely noticeable, requires TWICE the power! A 10 dB increase requires about ten times the power.

So if you had speakers of 95dB or greater they will require only about a tenth as much power. Buy speakers like this and you will eliminate 99% of your amplifier headaches, as you will be happy with as little as 20 to 30 watts. Buy inefficient speakers like you have and now you need 200 to 300 watts. See how quickly the situation gets out of hand?

Tekton Audio Design has a whole line of speakers across a wide range of prices all of them highly efficient and absolute screaming bargains for the money. 

This in your own words is what you like:
I freakin love the sound detailed(decay of strings and brushes on symbols, fingers plucking guitar strings etc) soundstage( speakers vanish instruments are here there everywhere but not outside of speaker footprint and not real deep front to back )imaging ( instruments have there own place voices are in the center) not harsh or bright but detailed not warm sounding.

That's exactly what you'll get with Tekton, and with high enough efficiency you can forget about watts and concentrate on finding amps with those same qualities. A good tube integrated, for example....