With the Level control adjusted fully clockwise, gain is at maximum and the input sensitivity is 0.39 V RMS for
full-rated output with the line level position of the Mic-Line Switch (7). When driving the DM™115 from a mix-
er, it may be advantageous to reduce the input sensitivity by turning the Level control to the halfway point. The
DM™115 will now more closely match a typical power amp.
If the mixing board indicates clipping of its output signals, then all of the DM™115 power capability is not being
utilized cleanly. Clipping the signal before it gets to the DM™115 is not optimal. Reduce the mixer
output level and turn up the Level control on the DM™115.
The amplifiers in the DM™115 are equipped with DDT™ and the LED indicator will show when DM™115 DDT™
has engaged. If the sound seems heavily compressed, check these indicators; if it is blinking RED more than
occasionally, then the drive level from the mixer (or the Level control on the DM™115) needs to be reduced.
When first turning on the sound system, switch on all upstream electronics first, then the DM™115 with its Level
control fully counterclockwise (all the way down). Begin checking levels with the mixer output level controls all
the way down, and bring them up slowly with the DM™115 Level control set to the
desired setting (one-third way up recommended to start).
It is not good practice to turn the Level control on the DM™115 all the way up and then try to control level only
from the mixer, this approach would tend to pick up excess noise. Best practice would be to run a “hot” signal
from the mixer down the cable to the DM™115, and then turn the DM™115 Level control up only as much as nec-
essary to reach full desired output. With this approach, it is necessary to verify the mixer output is not clipping.
Disconnecting AC Power to the DM™115
We recommend that the Power switch (3) be used to turn the unit off first, and then the AC power cord can be
removed, this minimizes stress to the power amplifiers and the transducers from turn-off transients. The pow-
er switch has an arc suppression capacitor to help during turn-off, and tends to make a clean disconnect from
the AC power, while the power cord IEC connector can make intermittent contact before finally becoming fully
disconnected, e.g., as when wiggling the cord.
EQ Preset Management – RECALL and SAVE Presets
Upon turn-on, the DM™115 loads the DSP firmware into memory, and after about 5 seconds, loads the last previ-
ously used preset, including any custom changes, into the DSP.
The message "
Recall preset
" appears in the LCD display along the top line, while the second line displays the
name of the preset loaded.
These will display for approximately 16 to 25 seconds, then if no action is taken, the model designator and num-
ber will display on the top line, and the currently loaded preset will display on the second line.
If the user desires to go to one of the other menu choices while the message
" Recall preset " appears in the LCD display, then simply rotate the "Push-to-Select" knob to access the other
menu choices.
Those choices are:
1. Recall Preset
2. Delay
3. Polarity
4. Bass
5. Treble
6. Save Preset
