Boss DUAL DIGITAL DELAY SDE-3000D Reference Manual page 10

Connecting an Amp and Configuring the Input/Output Settings
Using a Single Amp
Use the OUTPUT L/MONO jack when connecting to only one amp. The dry (direct) and wet (delay) sounds are mixed when output.
INPUT
Delay structure
(in series: connected one after another)
The two delays are connected in series.
Guitar
Delay structure
(parallel 1/2: connected separately in parallel)
The two delays are connected in parallel.
You can combine the two delays with different delay times to create your own sound.
Guitar
NOTE
The SDE-3000D fully recreates the bypass characteristics of the original Roland SDE-3000. Since the original sound is faithfully recreated by
varying the delay times and so on, you may notice a unique modulated sound that occurs with certain settings when you mix two delays that are
connected in parallel and output them in mono. This is not a malfunction.
10
(1-in, 1-out)
L/MONO
DDL 1 (L/R)
DDL 1 (L/R)
DDL 2 (L/R)
IN OUT settings
[SETUP] Ó "
"
in;ovt
Parameter Value
[TIME] buttons [DEPTH] buttons
ovt StErEo StErEo
(STEREO)
(Output Setting)
DDL 2 (L/R)
DRY+WET
AMP
Explanation
The sound is output in mono when
an amp is only connected to the
OUTPUT L/MONO jack.
DRY+WET
AMP