Update. The hum through the speakers has pretty much been solved. When the EML 45 tubes were shielded with the supplied tube cages and grounded properly, the hum was attenuated by ~10 dB at normal listening volume. Seems the EML 45s are very sensitive to hum. Now, I have to have my ear about 1 feet from the speakers to hear a slight hum at normal listening volume. It no longer is noticeable during quiet music passages. With the tube cages in place, I think there is subtle loss of warmth in the sound, which I kind of miss. Anyone using the tube cages with their GG?
The slight mechanical transformer hum still exists. It is audible from the listening position when no music is playing. Once the air conditioner kicks in, the mechanical hum gets drowned out. I think this is normal, but I ask if other GG owners are experiencing the same mechanical hum?
Rob recommended the TJ Fullmusic 300B SE to try with the GG. I did a search and only found sellers in China (mostly eBay) selling these which are quite pricey at $750/pair. Can anyone recommend a reliable sellar? Anyone try the Elrog 300B?
Thanks!