Thanks for the reply's. I will check out his review if I can get my hands on it. I was surprised to read some of the negative reviews (there were plenty of positives too) of the 331, 332 and 334 on Audioreview. It really baffles me because this amp is something special.
Levinson 331 upgrade to 331.5
I bought the 331 used and the list price for the .5 upgrade is $1,900. It seems rather pricey when I considered what I paid for the 331. Love the amp as it is, but would consider the upgrade if it could really take it to a level that justifies the cost. If anyone has been in my shoes and done the upgrade I am very interested in their thoughts and opinions. Thanks much.