The SPX50D is basically a SPX90 aimed at guitarists.
The main additions are a set of distortion effects, a digital tuner for guitars and support for being inserted within an effect loop. It incidentally dropped the support for a remote unit that the SPX90 had.
It's one of the few Yamaha boxes to feature a red retroilluminated LCD panel.
31.25 kHz 16-bit linear A/D converter (mono)
31.25 kHz 16-bit linear D/A converter
50 ROM presets
50 user patches
Connection terminals and interfaces
Input jack x2
Output L, Output R
Insert IN, Insert OUT
Memory trigger jack, Bypass jack
MIDI IN, MIDI THRU
Dimensions and weight
480w x 45.2h x 285d (mm)
Buy a used Yamaha SPX50D
YAMAHA SPX50D Digital Effects Sound Processor Worldwide Shipment