Hi all. I have posted quickly on the Zimo group, but thought I would check here too. I have three of the old Large Scale Zimo Mx690 chips, and the volume of the sound leaves a lot to be desired, I think they are on 1w output compared to 3w on more modern chips, and they just aren't loud enough for exhibition use. I wondered if something like this could be used in line to boost the volume, or would it cause damage to the chip? XPT8871 DC 3V 3.7V 5V Mono 5W Mini Amplifier Board Audio Amp Module One channel | eBay I was thinking the 5v power supply could be taken from one of the power outputs on the chip? JB.