Rane Stereo Amplifier DA 26S 用户手册

Manual-4

DOC 110958

4. Next, set up the six OUTPUTS. First, determine the num-

ber of zones served and the signals to be sent to each. Using 

a drawing like the example application diagram in the Data 

Sheet is helpful. For ease of wiring, make Outputs serving a 

common zone adjacent. Select Full-range, High-pass or Low-

pass as required for each output. The following are possible 

zone configurations:

• Full-range only for medium size bookshelf speakers.

• High-pass only for small distributed ceiling speakers.

• Full-range output combined with Low-pass Output to en-

hance bass response.

• High-pass output combined with Low-pass Output for true 

bi-amp operation.

5. The ±12 dB OUTPUT trims set Output levels, with relative 

levels between Full-range, High-pass and Low-pass. Note: the 

Priority Input level. The idea is to set system levels for proper 

operation at the maximum required SPL (with Remote Level 

controls set for unity gain). Remote Level controls then at-

tenuate the level as required. 

 is achieved by alter-

ing the gain control law of any Remote port associated with 

a Low-pass Output. A Low-pass Output is always used in 

conjunction with a high-pass or full-range Output. Because 

the Remote Level control turns the low-pass Output down 

at a lesser rate than the high-pass or full-range Output, bass 

response is enhanced. The corner frequency for loudness com-

pensation is set by the CROSSOVER frequency selection. The 

reference level for the room is set with the OUTPUT trim 

on the front panel. Any Remote Level gain change results in 

automatic loudness compensation.

6. A port for a wired Remote Level control is provided for each 

Output. Note: Remote Level controls do not affect the level of the 

Priority Input. Each port provides a 5 volt reference voltage 

(REF), a control voltage input (Vc) and a ground reference. 

The gain control law for Vc is 50 mV/dB. Using the optional 

VR 1 Remote control provides an audio taper response from 

0 dB to > -80 dB. To control more than one Remote Port with 

of each additional port. An external ground referenced control 

voltage with a range of 0 to 5 volts may be used with the 

Remote ports. If the ratiometric output of a linear potentiom-

eter is used, (GND to CW, Vc to center tap, REF to CCW), 

a linear log response results. Audio taper response requires a 

potentiometer with a reverse log taper. Audio taper response is 

achievable using a linear potentiometer by connecting a resis-

tor equal to 1/10th the value of the potentiometer between 

GND and Vc as shown below: 

 

 

Variations in wire type do not greatly affect the performance 

of the Remote controls. However, 22-gauge stranded wire 

with a flexible jacket is recommended. You may use 3-con-

ductor unshielded remote control signal cable for shorter 

runs (less than 100 feet [30 meters]). For longer runs, we 

recommend using shielded cable. The type of wire required 

is influenced by your installation and local electrical codes. 

Rane Corporation does not provide cable— please contact 

your local retail or wholesale outlet.

7. The balanced PRIORITY INPUT operates at line or mic level, 

determined by the MIC / LINE switch, on the rear panel 

next to the PRIORITY INPUT jack. See Rear Panel (1) for 

unbalanced connection rules. Note: the Priority Input is not 

controls. The gain range for MIC level Input is 30 to 60 dB. 

The gain range for LINE level Input is 0 to 30 dB. Set the 

PRIORITY GAIN to prevent overloading the Input — if the 

Priority Gain OL illuminates, turn down the GAIN.

8. The PRIORITY DETECT threshold is calibrated in dBu, 

and monitors the signal after the input preamp. Any change 

in PRIORITY GAIN setting affects the DETECT sensitiv-

ity. Set the GAIN, then set DETECT. The range of operation 

is +4 dBu to ON. The consequence of setting DETECT too 

low is premature triggering due to background noise. Setting 

DETECT too high results in excess delay and a sudden large 

step in amplitude (perceived as a “pop”). If a paging mic is 

used in an environment with a lot of background noise, we 

recommend a push-to-talk device. 

The release time is fixed at about 6 seconds. The release delay 

is based on the typical time required to accommodate a pause 

in speech or dead-time between music programs.

9. The PRIORITY DUCKER depth sets the amount of at-

tenuation 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 opera-

tion, use –80 dB. A value of –12 dB (2 o’clock) is typical for 

PRIORITY (page) talks over LINE (music) operation.

 

10. The state of the PRIORITY ASSIGN port determines Prior-

ity Input assignment to each of the six Outputs. Assignment 

pins are active low with passive internal pull-up. Any combi-

nation of pins may be active at one time. The select ALL pin 

is provided for convenience. To complete an assignment, the 

Output must be selected by the PRIORITY ASSIGN port 

and Priority Detect must be active. Note that if a combination 

zone must be selected by the PRIORITY ASSIGN port. The type 

of wire recommended is similar to the description in Step 6 

above.

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GND
Vc
REF

cw

10k

1k