You will not void any warranty, that is what they will tell you to check if you call their 800#, they are available late EST.

Also, it is interesting you thing the one good 60 sounds similar to the vp150 with the test tones. Is this the receiver pink noise? My 2 vp150's I've owned have always sounded more muffled compared to 60's or 80's. Many have mentioned this in the past.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85