Pretty cray. I'm not sure I like the idea of having speaker cords hanging around the stage to be tripped over, possibly exploding transformers and such, but maybe they've already thought about all this?
edit: not all valve, it'd turn out. Still kinda nifty, but maybe less exciting at that £500ish pricepoint.. _________________ musics
They have these in stock at a couple of my local guitar shops. They're surprisingly small and loud. But I was just overhearing people playing teh shred through them so I can't really comment on if they're actually any good. Sounded fine to me, but I wasn't blown away. _________________ www.gabrielwareing.com
Looks like a nice step up from the cute little Hotone amps, which don't sound super great, but still sound pretty darn good for what they are, being a walwart + simulator + juice for load. Ergo, bedroom meedley-meedlings adequately taken care of. I've seen these guys go as low as $65 here on the used market.
Joined: 14 Jan 2008 Posts: 9459 Location: Nr. Basinggrad, UK
Posted: Tue Jul 21, 2015 10:43 pm Post subject:
Class D is basically a digital output; the analogue input is used to vary the width of a high frequency square wave (Pulse Width Modulation) by which the output transistors are turned full on and off. These bursts of current are smoothed to provide a varying voltage. Because the transistors are either blocking or switched on at very low resistance there is very little power dissipated in the transistor and almost all the power is transferred to the output giving high efficiency (in theory) - that means you don't need so big a power supply and you don't need big heatsinks on your transistors. Some refinement of the basic technique is required for best efficiency.
The SMPSU is the Switched-Mode Power Supply Unit. This saves a huge amount of metalwork by turning the mains into high voltage DC and then using a high frequency oscillator to transfer the power through a smaller transformer. The size of the transformer's magnetic core determines how much energy you can transfer in each cycle. If you increase the frequency from 50 Hz to 2 kHz you can transfer the energy 40 times quicker or make the core that much smaller - almost every modern electronic device uses these - think of a laptop PSU, 90-135W in a small light brick.
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