Sensitivity Issues


I'm on the hunt for a speaker upgrade. My current amp is, well, modest (30 wpc Pass Labs). I've been advised to confine myself to sensitive speakers (more sensitivity in the house has cheered my wife). What range am I looking for, and how big a difference is there in a couple of db's, say 89 and 91? Also, if I drop down in resistance (8 to 6, or even 4 ohms), does this compensate, or do sensitivity figures already take resistance into account?
eleonida

Showing 1 response by sean

While i don't know know what all the reviews or even Pass Labs will tell you, my experience with Nelson's older designs tells me that your amp should easily deal with lower impedance loads. While his amps may not have as much current as some of the other big boys, they don't "flinch" when put to the test like many other reputable brands that shall remain nameless.

One thing to keep in mind is that the lower you go on speaker impedance, the lower the damping factor will be. If the speakers use a BIG motor structure ( large voice coil & magnet assembly ) or are relatively reactive loads, you can expect less than the best in terms of control and definition.

Since you did not mention room size or types of music that you like to listen to, we're kind of guessing here as to what will work acceptably. As such, shoot us more info and you might get some better info.

I'm assuming that you don't normally try to "raise the roof" since you selected an amp that was rated at 30 wpc. With that in mind, something that is at least 87 db's should be acceptable with something in the low 90's being easier on the amp ( in most cases ). Only problem with this is that many speakers that are more sensitive use some type of bass loading ( port, passive radiator, bass reflex, etc..). As such, they sacrifice bass definition and timbre for extension and "better numbers". Like anything else, there are trade-offs involved in everything and not knowing your preferences makes it difficult to make a valid suggestion. Sean
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