On a side note to all the talk of classic series circuit board reliability, i have a "series II" classic 30, which i believe debuted around 2013 tho i may be a bit off. But they revamped the amp with quite a few circuit changes, made the boost function foot switchable, added a standby switch, and most notably they tossed out that ridiculous 3 sided circuit board with dozens of solid wire jumpers that would break and render the amp useless at the most inopportune time. It's now a single board and a FAR better quality one at that. It now sports a celestion, and the tone is much better then the old ones. There IS a trick to making them sound even better, but they sound great as is. Just need to replace the horrid sounding sovteks for some JJs and the amp is a whole new one The JJ preamps aren't the best sounding either but not bad. I dunno why they put sovteks in the power amp and JJs in the pre, unless the previous owner changed the pre or power tubes. (mine is 1 year old but bought used/mint) Anyways, with a few changes i honestly get tones that rival some of the best amps i've had. I had 2 USA 30s from early on but this is a much better amp.