Rane DA 26S User Manual
Operators Manual
dBu dB
+4ON
MIN MAX
-12-80 0 +12 1:1:1
dBu
-12
+12
-12
+12
-12
+12
-12
+12
-12
+12
-12
+12
-12 -6 -3 03612
DA 26S
DISTRIBUTION
PROCESSOR
DETECT
PRIORITY
GAIN DUCKER
AGC
1
CROSSOVER OUTPUTS
POWER
OL SLOWACTIVE
LEVEL RATIO
FAST
GAIN
TARGET
HIGHFULL
LOW
3
HIGHFULL
LOW
2
HIGHFULL
LOW
4
HIGHFULL
LOW5HIGHFULL
LOW6HIGHFULL
LOW
FREQUENCY
150
11080
200
DA 26S
DISTRIBUTION AMPLIFIER
Quick Start
Are you in a hurry? For optimum system performance, we recommend reading the detailed Setup & Operation below and on page
Manual-4. For those who can’t wait, at least be aware of these points:
• ere are two inputs: PRIORITY and LINE. e PRIORITY Input accepts MIC or LINE level.
• e PRIORITY Input sums with an output when assigned by the PRIORITY ASSIGN Port, and PRIORITY DETECT is ac-
tive.
• e level of the PRIORITY Input is unaffected by the AGC, Output Level controls or Remote Level controls.
• e AGC only operates when the signal is within 26 dB of the Target Level. If the Line Input level is out of AGC range, the 0 dB
indicator on the AGC GAIN meter is off.
• With the RATIO set to ∞:1, the AGC GAIN meter should indicate about 0 dB for nominal Line Input levels.
• e AGC SLOW / FAST switch only affects the gain reduction time constant. e gain increase time constant is fixed.
• Only the LINE Input is processed by the AGC, CROSSOVER, Output Level and Remote level controls.
• e three Crossover Outputs (full-range, high-pass and low-pass) may be selected by any of the six Outputs.
• Set the initial Output levels using the Output Level controls on the front panel.
• Remote Level controls allow end user adjustment of Output level.
• Any combination of Remote Ports may be controlled by a single Remote device.
• Remote Level controls provide automatic loudness compensation for low-pass Outputs. Loudness compensation is not provided for
full range Outputs.
• e optional VR 1 Remote Level control provides audio taper control over a range of 0 dB to –80 dB.
Setup & Operation
e outline below is detailed in the following procedure.
1. Set Line Input level
2. Set AGC (Automatic Gain Control) Target Level and Ratio
3. Set Crossover frequency
4. Select Source for each Output (Full-range, High-pass or Low-pass)
5. Set Output Level controls
6. Connect Output Remote Level controls
7. Connect the Priority Input for the intended source
8. Set the Priority Input automatic Detect threshold
9. Set Ducking depth for the application
10. Priority Assign selection
1. Connect a balanced line level source to the Line Input. e
Line Input accepts an unbalanced Input connected to (+) and
(GND). We do not recommend unbalanced operation unless
the distance to the source is less than 3 feet [one meter].
2. e Line Input signal is processed by the AGC circuit. e
AGC GAIN meter 0 dB indicator lights when the Line Input
signal is within 26 dB of the set TARGET LEVEL. For Line
Input levels more than 26 dB below the Target Level, the 0 dB
indicator is off and AGC returns to unity. e AGC GAIN
indicates the amount of attenuation used to make the Line
Input level equal the set TARGET LEVEL. For best results,
WEAR PARTS: is product contains no wear parts.
the AGC GAIN meter should indicate about 0 dB for nominal Line Input signals. e best resolution for this adjustment is
achieved with the AGC RATIO set to ∞:1.
e TARGET LEVEL is set in one of two ways:
a) If you have a source output level control, set the TARGET
LEVEL to the desired setting and adjust the Line Input
level so that the AGC GAIN meter indicates 0 dB for
nominal signal levels.
b) If a source output level control is not available, adjust the
TARGET LEVEL so the AGC GAIN meter indicates 0 dB
for nominal Line Input levels. e difference between the
resulting AGC Target Level and the desired Target Level is
compensated with the OUTPUT trims. With Input level
and TARGET LEVEL correctly set, adjust the AGC RATIO to the desired value. We recommended values between
2:1 and ∞:1 as marked by the gray band. e soft-kneeresponse of the AGC results in a natural sounding response
with AGC Ratios as high as ∞:1.
3. e CROSSOVER splits the Line Input signal into three
separate Outputs: Full-Range, High-pass and Low-pass, each
selectable for each of the six Outputs. Select the desired FREQUENCY (80, 110,150 or 200 Hz).
continued on page Manual-4...
Manual-1
Front Panel Description
dBu dB
+4ON
MIN MAX
-12-80 0 +12 1:1:1
dBu
-12
+12
-12
+12
-12
+12
-12
+12
-12
+12
-12
+12
-12 -6 -3 03612
DA 26S
DISTRIBUTION
PROCESSOR
DETECT
PRIORITY
GAIN DUCKER
AGC
1
CROSSOVER OUTPUTS
POWER
OL SLOWACTIVE
LEVEL RATIO
FAST
GAIN
TARGET
HIGHFULL
LOW
3
HIGHFULL
LOW
2
HIGHFULL
LOW
4
HIGHFULL
LOW5HIGHFULL
LOW6HIGHFULL
LOW
FREQUENCY
150
11080
200
1 PRIORITY GAIN trim and OL indicator: adjusts the gain for the PRIORITY INPUT. Set this trim to prevent overloading the
Input — if the Priority Gain OL illuminates, turn down the GAIN.
2 PRIORITY DETECT trim and ACTIVE indicator: sets the threshold in dBu for the PRIORITY INPUT to override the LINE
INPUT. When the threshold has been reached, the ACTIVE indicator illuminates. Set the GAIN(1), then set the DETECT trim.
e range of operation is +4 dBu to ON. e release time for the auto-detect circuit is xed at about 6 seconds, after which the
LINE INPUT signal returns to it's previous level.
3 PRIORITY DUCKER trim: sets the amount of attenuation applied to the LINE INPUT signal when the PRIORITY INPUT is
activated by the DETECT threshold. DUCKER depth is continuously adjustable over a range of 0 dB to –80 dB. For equal mixing of PRIORITY and LINE, set the DUCKER to 0 dB. For PRIORITY replaces LINE operation, use –80 dB. A value of –12
dB (1 o’clock) is typical for PRIORITY (page) talks over LINE (music) operation.
4 AGC TARGET LEVEL trim: is best set so the average signal at the LINE INPUT reads 0 dB on the GAIN meter. is gives the
best performance of the AGC (Automatic Gain Control). Active constant gain range of the AGC is ±12 dB (24 dB range). When
the Input falls 26 dB below the AGC Target Level, gain returns to unity. See Setup and Operation, step 2.
5 AGC RATIO trim: determines the Ratio applied to the AGC with a soft-knee response. Increased clockwise rotation increases
the amount of AGC. e full counter-clockwise position disables the AGC. e normal range of operation is between 2:1 and
∞:1 as marked by the gray band.
6 AGC SLOW/FAST release switch: determines the gain reduction time constant of the AGC circuit. SLOW = 230 ms (best for
music), FAST = 11 ms (best for voice). e gain increase time constant is xed at 1100 ms.
7 AGC GAIN meter: indicates the amount of AGC applied to the LINE INPUT. e 0 dB GAIN indicator is o if the Input is
more than 26 dB below the Target Level.
8 CROSSOVER FREQUENCY switch and indicators: select the FREQUENCY for the 2-way Crossover when High-Pass and/or
Low-Pass outputs are used (80, 110,150 or 200 Hz). High, Low or Full-Range is selectable for each of the six Outputs.
9 OUTPUT trims and Crossover select switches: e ±12 dB trims set the levels for each of the six Outputs. High, Low or Full-
Range is switch selectable for each of the six Outputs. Note: the Output trims do not affect Low-pass loudness compensation or Prior-
ity Input level. See Setup & Operation, step 5.
0 POWER indicator LED: is yellow illumination device lights up to let the operator know the thing is plugged in.
Manual-2
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