I noticed quite a few young buskers in Ireland recently using these small amps, but not really earning anything. Because as someone above me pointed out, it does annoy local shopkeepers and public in general. Example, I passed this young chap with an amp in Kilkenny a few times in the same hour one day and he hadn't taken a cent. Then I spotted an old timer with a beat up banjo in the same shopping area,no amp, he must have had a good 50 Euro in his cap! Leave the amp at home