do some search - I found easy two relevant responses
#1 05-25-09 from Isanchez:
The LA-150 MKII Signature Edition is the LA-150 MKII plus V-Cap OIMP output capacitors. It also borrows some other internal components from the LA-300ME flagship preamplifier. These new parts upgrade should give the LA-150 MKII Signature Edition very similar texture as Joule Electra's flagship LA-300ME preamp...
I had the LA-150ME, which I then upgraded to the LA-300ME. Since the LA-150 MKII SE should be close in performance to the LA-150ME I had, it is a fantastic preamp for the price and most likely the best deal in Joule-Electra's preamp line-up.
#2 01-16-09: from Psag
I recently upgraded from the LA-150 MkII to the LA-150ME. The LA-150ME was only briefly available, and has since been replaced by the LA-300. Regardless, the LA-150ME is a clear improvement over the LA-150 MkII, which was already one of the most natural sounding preamps I've ever heard. The sound of the LA-150ME just sounds truer to the ideal of real music. Textural details of acoustic instruments are more detailed and realistic. I'm planning to upgrade my unit to the LA-300, as soon as Jud has the time.
Good Luck
Rafael
#1 05-25-09 from Isanchez:
The LA-150 MKII Signature Edition is the LA-150 MKII plus V-Cap OIMP output capacitors. It also borrows some other internal components from the LA-300ME flagship preamplifier. These new parts upgrade should give the LA-150 MKII Signature Edition very similar texture as Joule Electra's flagship LA-300ME preamp...
I had the LA-150ME, which I then upgraded to the LA-300ME. Since the LA-150 MKII SE should be close in performance to the LA-150ME I had, it is a fantastic preamp for the price and most likely the best deal in Joule-Electra's preamp line-up.
#2 01-16-09: from Psag
I recently upgraded from the LA-150 MkII to the LA-150ME. The LA-150ME was only briefly available, and has since been replaced by the LA-300. Regardless, the LA-150ME is a clear improvement over the LA-150 MkII, which was already one of the most natural sounding preamps I've ever heard. The sound of the LA-150ME just sounds truer to the ideal of real music. Textural details of acoustic instruments are more detailed and realistic. I'm planning to upgrade my unit to the LA-300, as soon as Jud has the time.
Good Luck
Rafael