Amp was only ever used indoors in combination with a Fender Rhodes (beatuiful tone!). The biggest advantage of this particular amp is that low, mid, high frequencies have almost the same quality, and is therefore well-suited for instruments and music where a big tonal range is needed.
Fender Rhodes official website info:
All-tube electric guitar amplifier (2x 12AX7, EL84)
15 watts
1x 10" Celestion Greenback G10
1x channel
Solid-state rectifier
Volume, Tone
1 instrument input
Footswitch input
Height 36.83 cm
Width 38.73 cm
Depth 22.22 cm
10.36 kg