Wonderful, toneful little 5 watt amp but the general consensus is that speaker and tube upgrades are mandatory.  The stock speaker is ratty and farts out when turned up.  The stock Chinese tubes similarly do not do your tone any favors. This amp was upgraded with a Weber Signature 6L alnico speaker priced at $52 dollars and worth every penny.  The 6V6 power tube was upgraded to an Electro-Harmonix and the 12ax7 preamp tube was changed to a Mesa/Boogie - total value was $36.  No other mods so you can rest assured the insides have not been hacked up.  I love the amp but I'm gassing for a Tweed Deluxe so I have to part ways with this guy and will probably regret it!