At a hotel.
Seeteeyou, got yours? Wanted to ask a few q about your unit.
Basically, would you know if i can plug in usb ext charger while there're are (rechargeable batteries inside?
The instructions showed that the trrs bal 2.5mm input is different from the output trrs configuration. Is it the same wih your unit?
Yes, it's delivered last Friday.
According to the instructions, we need batteries that are providing 5V / 1A (i.e. at least 5 watts) in order to power the amp up. Check the manual of your batteries and most likely we'll have at least 1A unless it's a really old one.
Sometimes the batteries might not be deliver precisely 5.0V since that particular value could fluctuate just a little bit. The bare minimum should be 4.6V as mentioned in the manual:
If the voltage were 4.6V or above, the power indicator on the upper-right corner should be in green color.
If the voltage were below 4.6V, the power indicator on the upper-right corner should be in red color and that's NO GOOD.
Basically stick with brand name batteries and they should be fine with the appropriate power requirements. Stay away from generic ones that are really cheap because they might even explode or something.
If you don't mind spending more for much better batteries and carry them with you, here are some options
http://jplay.eu/jcat/#manual2
http://stereodesk.com/products/the-bakoon-bps-02
http://www.moon-audio.com/kingrex-u-power.html
Masuda-san sent everyone an e-mail and asked each owner to specify the balanced input / output type respectively.
He gave us 4 choices and I picked the last one:
Input = AK240 2.5-mm
Output = AK240 2.5-mm
AK240 2.5-mm should look just like this,
T / R / R / S =
R- / R+ / L+ / L-
I only have the TRRS plugs from Nakamura but no cables yet, my only source with balanced output is AlgoRhythm Solo -dB but I can't test my 2.5-mm balanced connections without a cable.
My LCD-X worked fine with XLR balanced output and I was feeding the amp with the single-ended output of Tera-Player. The amp was able to convert single-ended input into balanced output successfully.