User manual

miniDSP Ltd – Hong Kong / Email :
[e-mail] / Features and Specifications are subject to change without prior notice
P 7
Sensitivity Jumpers
ALL OPEN (default): 2Vrms max on unbalanced
ALL CLOSED (unbalanced signal only!): 0.9Vrms max input
Template Jumper
configuration for 1channel
2.2.2 Audio connectivity
miniDSP can accept both balanced and un-balanced audio inputs/outputs. See the below instructions for audio connectivity on
your miniDSP Balanced kit.
Signal Max input/Max output
Maximum Input signal @ 0dBFS RCA connector: 2Vrms (+8 dBu) or 0.9Vrms depending on input jumper position
Phoenix Terminal block: 4Vrms (+14 dBu) with an unbalanced signal, 8Vrms with a
balanced signal (20dBu)
Maximum Output signal @ 0dBFS RCA connector: 2Vrms or 0.9Vrms depending on output DIP switch position
Phoenix Terminal block: 4Vrms (+14 dBu) with an unbalanced signal, 8Vrms
balanced with a signal (20dBu)
Balanced connection (In/Out): Follow connectivity as shown on underside of the board.
o S = > Cable Shield
o + = > Positive cable
o - = > Return cable
The latest board version is fitted with input and output jumpers allowing sensitivity (input) or gain (output) tuning. See below
information. If you purchased a board from the earlier version and have a need for modifying the output gain, contact us at
[e-mail] and we can help you.
Sensitivity Jumpers for unbalanced inputs
A set of jumpers is available to modify the input sensitivity (i.e. max input) from 2Vrms to 0.9Vrms for unbalanced inputs only
. Sensitivity
is the maximum signal before an input saturates so if your signal is too small (e.g. MP3 player), you can optimize your “gain structure”
by modifying the input jumpers to 0.9Vrms for a “more sensitive” input.
Note that this jumper configuration should not
be used when a balanced signal is used. Please make sure to carefully
configure your jumper accordingly. By default, note that all boards are configured without jumpers (i.e. 2Vrms setting) so
both unbalanced and balanced can be used.
CH 1
CH 2
CH 2