Ok, power attenuators....wherether the're cheap or expensive, they all suffer from the same thing: it changes the tone of the amp. Especially in the lower and higher frequencies. This is inherent to the type of product. Why? Because you can't exchange an AC resistance and the complexity of inductance that an amp experiences with a speaker (and it's voice coil) by using high power fixed DC resistors. It's that simple. There are some circuitry tricks around them to compensate this a bit, but it's always there to some extend. The impedance of a speaker is a nominal value set around a 1Khz. base. In reality, this impedance changes throughout the frequencyspectrum. With a power attenuator, you exchange this impedance changes with a fixed resistance. That's why the tone changes from your amp especially in the lower and higher frequencies because the subtle fluctuations that normally happen when you use a speaker come less into play the more you attenate your signal to the speaker. So is this a bad product then? No! But you have to take the things I mentioned into consideration once you start using a power attenuator. For the money, it does it's job and I've heard more bad variations than this one.....but when you compare your amp's tone on a given volume with and without this unit plugged between your amp and your speakercab, you'll instantly notice a difference in tone, even when the level of the attenuator is cranked (which then still cuts 3 db out of the output level of the amp)......
