Posted by Lew on June 03, 2005 at 07:05:10:
In Reply to: Re: Re: Lew, you have good memory ! posted by ad010685 on June 02, 2005 at 23:54:51:
I don't know that the impedance "in the bass" is 64 ohms precisely, but it is in that range and
may be higher at extreme low frequencies. A high-impedance load demands voltage from an
amplifier, not current. In general, ss amps are at a disadvantage compared to tube amps with v
high impedance loads due to the fact that the rail voltages in ss amps tend to be a lot lower than
what is typically found in tube amplifiers. However, ss amps can be designed to ameliorate this
problem, so making a general statement is dangerous. The McIntosh ss amps traditionally
employ an output transformer or autoformer, which may help in this case. The point is that if
you are getting a deep, rich bass response of which the speakers are capable, then you have no
problem. Do not get carried away with all the lights and meters on the amplifier, just go by what
you are hearing. But, if money is no object, then, sure, 400W is likely to provide a somewhat
greater margin for bass transients than 250W, but most of us are happily making due with 250W
and less, even with ss amplification.