This stage echo is very powerful tape based machine, with 5 payback heads can produce 5 types of delay, including sound-on-sound.  There are 2 inputs with 3 levels to select, and 2 outputs with 3 levels to select.  There's also a balanced input and output.  For the 2 inputs, there's volume control as well.  For the echo portion, you have 5 switches that can be selected in any combination to activate the heads, a knob for feedback control, and a speed control knob.  The echo also has treble and bass controls, and a balance knob for the output of one of the 2 outputs. (The other is strictly echo only).

The original manual is included.  The tape and rollers were replaced in April, 2017.  I'm also including a spare tape to keep you going!

This unit also comes with an Anvil Road Case made specially for the SE-500, which adds considerably to the weight and the shipping charge. (Sorry). But trust me, this is quite a unit!!!