I loved your video on impedance matching speaker cables and agree with using white noise as the reference for your tests. One curious thing I have found by chance is that if you put a relatively high value resistor of say 330 Ohms or more across a 4 Ohm value speaker it will knock down the harshness /brightness of your sound. If you raise the value the sound goes more brighter. You need to experiment. If you go too low the sound gets muffled and you lose dynamics. However it gets complicated. The better the speaker placement the less you need to rely on this treatment. The wave reflection is also in the room air pressure waves. People forget that a speaker is also a microphone at the same time. Your amp is driving the speaker but air pressure waves cause a feedback current back to it. I feel my high value shunt resistor is correcting this for the individual's particular circumstances. You need to find a value that gives you the cleanest vocal/midrange frequencies is the best. Even a 10% change in value can make a difference. Note the value you use is determined by your whole hifi package. Change your interconnect/amp and so on and you will probably need to change the resistor. Also the resistor value for the right and left speakers may be different too. Cheap fine tuning! Best wishes for your endeavours. Cheers Keith
