Sorry for the late response. I received the Burson V5i opamps. But had to replace the cheap IC holders with machine tool sockets in the Jolida JD9 first. This made for a much nicer and more secure installation for the V5i, but they fit great. After listening for about a week, I have noticed a much improved sound stage. But the first thing I noticed was very much improved BASS response which had always been lacking in my system, not anymore. The bass is tighter, more pronounced and punchy; just the way I like it. The range and detail in the music is just fantastic. I hear more of the music, sounds and detail I could’nt hear before. This is a great product and I can highly recommend them. This was a lot of work, but well worth it. Thanks again,