The Delta 30 was created from the Stereo 30+ with minor modifications e.g including 2 capacitors added for the earphone socket based on schematics found on the internet comparing agianst what I could make out after reviewing the internals at a glance.
Though sporting a lowly 15W RMS per channel, it packs "quite a kick". Like all Leaks, the Delta 30 is a musical amp, with clearity to match.
Was throughly surprised at how well it partners the Technics SB-X700 (after "iso" features added)!
The Delta 30 has the following inputs, with TUNER1 for microphone connectivity via RCA. There are LOW-HIGH gain selectors for DISC1 (aka phono) and TUNER1. My Delta 30 is multi-voltage capable as well.
|2-pin DIN speaker connector|
The next pix shows the unit once removed from the wooden casing.
|Without wooden casing|
|Internals from top|