I'm waiting for one of these to arrive from Thomann, but can't find much info online regarding the technical specs beyond a stated output of 10 watts, that the speaker is a single 5" and that there are two channels, normal and drive.
I'll be using this unassuming little thing mainly as a practice amp, through the built-in speaker and through headphones, but also as a low volume, battery powered rig for when I'm on my boat or away from mains power and fancy bringing my 4 string passive bass along to an acoustic jam.
Having read Happy Jack's thread on battery powered rigs, I'm beginning to wonder whether this tiny unit could be modified to become something more than just a micro practice amp. I was thinking along the lines of adding a connection for an external speaker that could bypass the built-in 5" driver, when required, allowing the use of a proper, lightweight cab equipped with a decent driver (1x10, 1x8 or even Phil Starr's little 1x6 House Jam Micro Cab). Hopefully this would make better use of the 10w output, but still with the option of running on six rechargeable AA batteries, a small sealed 12v lead acid battery with a 12v to 9v step-down adapter, or a USB power bank with a 5v to 9v step-up adapter.
Before I start dismantling the Joyo when it arrives to find out what's inside, I thought I'd ask if anyone here knows:
A). Is the amp output mono, ie, with the whole 10 watts going entirely to the single 5" driver? The spec mentions two channels (normal and drive) but I'm unclear whether this means the output is split between them, and hence reduced to 5w. I'll only ever be using the normal clean channel and can't really see the point of a dedicated overdriven channel when the same effect could be had by simply cranking up the gain control.
B). Is the 10w output at 4 ohms or 8 ohms? I guess the built-in driver would most likely be 4 ohms to maximise the volume.
C). One of the customer reviews on Thomann suggests that the amp is high pass filtered at 60hz, which would make sense with such a small driver, but I can't find any detailed spec to confirm this.
I know there are several ready made battery powered combos such as the Roland Bass Micro Cube or Boss Dual Cube, along with amp heads like the GR Pocket 50, Quilter Interbass 45, Hotone Thunder Bass, and various low cost, home brew solutions using Chinese D-Class boards of indeterminate quality, but all are quite costly, involve DIY projects with no guarantee of success, or need much bigger, higher voltage battery power sources than I'm prepared to cart around. The Joyo seems to get pretty good reviews tone wise, but falls down in the loudness department, hence my interest in improving on the latter.