I will definitely keep this in mind while I’m researching for a power supply.46346 wrote: ↑Mon Feb 15, 2021 3:07 amone potential problem with many of the less expensive portable AC power supplies, is that while coming from an internal DC battery source, the inverted 60Hz AC is synthesized somewhat crudely, and not as a true sine wave. this causes a classic buzz/hum for audio amplification, it can be pretty annoying.
i've avoided this in two ways:
1) did some research and spent a little more on a stand-alone inverter that was spec'd as 'clean AC sine wave power' or some such. i run that off of
a deep-cycle 12v boat battery. i can play full range 120v AC loud amps for hours and hours. it's a heavy rig, but i need clean and loud!
2) use a good DC powered amp or two, that have their own built in batteries and chargers. you can use the cheaper AC power supplies/inverters from the hardware store to charge the DC amp's battery.
of course if there's a DC powered amp that you really like, you could skip the inverter and just get a fat DC battery rated to match it.
it's also quite possible that some of the recent, less expensive supplies are now synthesizing cleaner 60Hz AC. but be prepared to have to return them if you're getting buzzes. i've tried some that touted 'clean power' but still aren't good enough for audio.
cheers and good luck!
I’ve talked to a couple amp builders I know and they both advised me that a tube amp probably wouldn’t be wise. Those Hotone amps do look like a great option. Especially for so little in terms of weight.