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Minimum Amp power for spkr performance

Hi, What does the spkr's label as Nominal/musical power(w):150/300 really mean ? Does it mean it requires at least 150W Amp power to drive it ? Would a 50W amp-power(8ohm)be enough power to drive the spkr properly ? Your opinion and suggestion is highly appreciated and thanks in advance
Simon - PS :the spkr is of 89dB sensitivity(4-8ohm)
simonleemd
newbee
4,767 posts
 
What it is probably telling you is that a 150/300 (8ohm/4ohm) amp is what it takes to drive this speaker to its maximum output. I must tell you that I find this is a specification that is mostly meaningless and it used by unknown named speakers sold by white van's. Most manufacturers will clearly recommend an amp with minimum wattage to drive their speakers and some will specify a max wattage as well. A 50w amp will drive this amp to peaks of about 106db's. A 150w amp will drive it to about 111db's +/- a db or so.
zoya
120 posts
 
150/300 means your speaker can handle 150 watts of continious power and 300 watts max peak power.
Speaker sensitivity showes how loud the speaker will sound at indicated power (usually it states at 1 or 2 watts).
Hope it helps.
elevick
2,636 posts
 
an 89db 8 ohm speaker is relatively easy to drive:
1 watt = 89db
2 watts = 92db
4 watts = 95db
8 watts = 98db
16 watts = 101db
32 watts = 104db
64 watts = 107db
132 watts = 110db THX certified levels
Most amps have different wattage rating for different impedances. Many are 100 @8ohms and 170 to 200 @4ohms.
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