Boss SE50 Stereo EFX Processor

This is a mid 80's unit with a variety of Echo, Chorus and Flange effects.  All of the various selections appear to work fine.  

Please note: The displayed Parameters for all of the Effects from number 100 through 128 appear in the window as the original stock settings.  Many of the User Memories (1 thru 99) have a variety of odd Characters in the display, and some of the effects parameters (balance, EQ) appear to have been altered.   We cannot say if this is indicative of saved changes or some sort of failure within the unit memory.  

FEATURES

• 2 - In, 2 - Out Routing: The SE - 50 provides true stereo performance, thanks to its 2 - In, 2 - Out system. Moreover, this means you can obtain stereo output even when using mono instruments, such as a guitar.
• Offers a Complete Selection of Algorithms: The SE - 50 employs 28 onboard algorithms. (They determine the way in which effects are combined.) As a result, you have control over the tools needed for creating almost any timbre you want.
• Pedal Control Provided: After plugging in a foot - switch, you can shift among programs simply using your foot.
• MIDI Control: Since the SE - 50 is equipped with MIDI connectors, an external MIDI device can be used to control it. Moreover, this feature allows you to transfer your SE - 50's data to a MIDI sequencer or
  another SE - 50.
• Mountable in 19 - inch Racks: Using the optionally available RAD - 50 Rack Mount Adaptor, the unit will fit perfectly in a 19 - inch rack.

SPECIFICATIONS

Patch Memories
User's Memories:   100
Preset Memories:   -28

Signal Processing
A/D Converter:       16 bit
D/A Converter:       16 bit

Sampling Frequency
48kHz/32kHz(set every algorithm)

Rated Input Level
-20/+4dBm

Input Impedance
1M ohms

Rated Output Level
-20/+4dBm

Output Load Impedance
More than 50k ohms

Frequency Response
20Hz to 20kHz(+1, -3dB) (Sampling Frequency:48kHz)
20Hz to 15kHz(+1, -3dB) (Sampling Frequency:32kHz)

Residual Noise
Less than - 95dBm (IHF - A)
(LEVEL Switch: - 20dBm, THRU)

Input Channel
2

Input Gain
-20dB to +12dB

(OdBm=0.775Vrms)

Output Channel
2

Controls
«Front Panel»
INPUT LEVEL Knobs L (MONO)/R
NUMBER Buttons UP/DOWN
PARAMETER Buttons UP/DOWN
VALUE Buttons UP/DOWN
WRITE Button
EXIT Button
UTILITY Button
EFFECT Button
POWER Switch
«Rear Panel»
LEVEL Switch

Display
16 - letters, 2 - lines LCD (back lit)

Indicator
Overload L/R
Effect On/Off
Utility

Jacks
INPUT Jacks L(MONO)/R
OUTPUT Jacks L(MONO)/R
EFFECT REMOTE Jack
NUMBER SHIFT Jack
MIDI Connectors (IN, OUT)
AC Adaptor Jack

Power
12V AC (BOSS BRB - 120, 220, 240)

Current Draw
1A