Rane DA 26 Amplifier
Contents
1. 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 Ifa 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 of Crossover Outputs is used in one zone al2. AGC Ratios as high as 00 1 3 The 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 FRE QUENCY 80 110 150 or 200 Hz continued on page Manual 4 Manual 1 FRONT PANEL DESCRIPTION PRIORITY CROSSOVER OUTPUTS O 2 3 4 5 6 FREQUENCY DAN SE ERRI REA wit wate DASE n On On r sOlO ofgmedrin ono oo ono oo om on TARGET DETECT DUCKER LEVEL oi ee een Ta ee eT DAL HIGH LOW FULLHIGH LOW FULL HIGH LOW FULL HIGH Lo pli ab ia DO 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 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 D then set the DETECT trim The range of operation is 4 dBu to ON The release time for the auto detect circuit is fixed at about 6 seconds after which the LINE INPUT signal returns to it s previous level 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 mix ing of PRIORITY and
3. 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 AGC TARGET LEVEL trim is best set so the average signal at the LINE INPUT reads 0 dB on the GAIN meter This 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 AGC RATIO trim determines the Ratio applied to the AGC with a soft knee response Increased clockwise rotation increases the amount of AGC The full counter clockwise position disables the AGC The normal range of operation is between 2 1 and co 1 as marked by the gray band 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 The gain increase time constant is fixed at 1100 ms AGC GAIN meter indicates the amount of AGC applied to the LINE INPUT The 0 dB GAIN indicator is off if the Input is more than 26 dB below the Target Level 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 Q OUTPUT trims and Crossover select switches The 12 dB trim
4. Remote Level controls then at tenuate the level as required Automatic loudness compensation 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 gt 80 dB To control more than one Remote Port with a single Remote control it is only necessary to connect the Vc pin 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 r
5. RANE OPERATORS MANUAL DA 26 DISTRIBUTION AMPLIFIER PRIORITY CROSSOVER OUTPUTS Cc TARGET GAIN DETECT DUCKER LEVEL 1 2 3 4 5 6 amaie er w REN pen ae Pee a 120 JO JO iO 0 Glo Be O0O0 O00 C eas on L CaN EY O 80 110 150 200 FULL HIGH LOW FULL HIGH LOW FULL HIGH LOW FULL HIGH LOW FULL HIGH LOW FULL HIGH LOW POWER O QUICK START Are you in a hurry For optimum system performance we recommend reading the detailed Setup amp Operation below and on page Manual 4 For those who can t wait at least be aware of these points e There are two inputs PRIORITY and LINE The PRIORITY Input accepts MIC or LINE level e The PRIORITY Input sums with an output when assigned by the PRIORITY ASSIGN Port and PRIORITY DETECT is active e The level of the PRIORITY Input is unaffected by the AGC Output Level controls or Remote Level controls e The 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 e With the RATIO set to 00 1 the AGC GAIN meter should indicate about 0 dB for nominal Line Input levels e The AGC SLOW FAST switch only affects the gain reduction time constant The gain increase time constant is fixed e Only the LINE Input is processed by the AGC CROSSOVER Output Level and Remote level controls e The three Crossover Outputs full range high pass and low pass may be selected by any of
6. d unbalanced operation unless the distance to the source is less than 3 feet one meter N The Line Input signal is processed by the AGC circuit The 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 offand AGC returns to unity The AGC GAIN indicates the amount of attenuation used to make the Line Input level equal the set TARGET LEVEL For best results WEAR PARTS This product contains no wear parts the AGC GAIN meter should indicate about 0 dB for nomi nal Line Input signals The best resolution for this adjustment is achieved with the AGC RATIO set to 1 The 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 Ifa source output level control is not available adjust the TARGET LEVEL so the AGC GAIN meter indicates 0 dB for nominal Line Input levels The 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 RA TIO to the desired value We recommended values between 2 1 and oo 1 as marked by the gray band The soft knee response of the AGC results in a natural sounding response with
7. esponse 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 cw GND REF Manual 4 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 for unbalanced connection rules Note the Priority Input is not influenced by the AGC Crossover Output trims or Remote Level 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
8. f the six Outputs Assignment pins are active low with passive internal pull up Any combination 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 of Crossover Outputs is used in one zone all Outputs serving the zone must be selected by the PRIORITY ASSIGN port Variations in wire type do not greatly affect the performance of this port However 22 gauge stranded wire with a flexible jacket is recommended Unshielded multi conductor cable is OK for shorter runs less than 100 feet For longer runs we recommend shielded cable LINE INPUT connector Connect a balanced line level source to the Line Input The Line Input accepts an unbalanced Input connected to and GND but we do not recommend unbalanced connection unless the distance to the source is less than one meter then only connect and GND OUTPUT and REMOTE connectors are on single 6 pin Euroblocks one set for each Output Outputs are line level balanced and hopefully driving a balanced equalizer or amplifier If not keep cable lengths short and consult RaneNote 110 Sound System Interconnection located elsewhere in this manual Connections for optional wired Remote Level controls are provided for each Output Note Remote Level controls do not affect the level of the Priority Input Each port pro
9. l Outputs serving the zone must be selected by the PRIORITY ASSIGN port The type of wire recommended is similar to the description in Step 6 above 10802 47th Ave W Mukilteo WA 98275 5098 TEL 425 355 6000 FAX 425 347 7757 WEB www rane com 104699
10. ory with a Model RS 1 Remote Power Supply suitable for connection to this input jack The power requirements call for an 18 VAC center tapped transformer only This is not a telephone jack Never use a power supply with your DA 26 other than the one supplied or an exact replacement obtained from Rane Corporation Using any other type of supply may damage the unit and void the warranty Manual 3 Rane Corporation Setup amp Operation continued from page Manual 1 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 e Full range only for medium size bookshelf speakers e High pass only for small distributed ceiling speakers e Full range output combined with Low pass Output to en hance bass response e 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 Output trims do not affect Low pass loudness compensation or 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
11. s 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 Priority Input level See Setup amp Operation step 5 POWER indicator LED This yellow illumination device lights up to let the operator know the thing is plugged in Manual 2 REAR PANEL DESCRIPTION 60 DA 26 6 SY 5 Sy 4 O 3 63 2 sy 1 LINE PRIORITY PRIORITY LO MADEINUSA RMT OUT RMT OUT e RMT OUT D RMT OUT e RMT OUT Q RMT OUT INPUT ASSIGN INPUT AF EN ry OEE fa e e gt A eS EEEEEE Al A He g EA jep CELE fe Gece GEER Eaz E o mi Je weh Wie b Z1 Z2 Z3 Z4 25 Z6 ALL Do PRIORITY INPUT connector and MIC LINE switch The balanced PRIORITY INPUT operates at line or mic level deter mined by the MIC LINE switch This Input accepts unbalanced signals however we do not recommend unbalanced operation unless the source is within 3 feet one meter then only connect and GND Note the Priority Input is not influenced by the AGC Crossover Output trims or Remote Level 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 PRIORITY ASSIGN port The state of the PRIORITY ASSIGN port determines Priority Input assignment to each o
12. the six Outputs e Set the initial Output levels using the Output Level controls on the front panel e Remote Level controls allow end user adjustment of Output level e Any combination of Remote Ports may be controlled by a single Remote device e Remote Level controls provide automatic loudness compensation for low pass Outputs Loudness compensation is not provided for full range Outputs e The optional VR 1 Remote Level control provides audio taper control over a range of 0 dB to 80 dB e Never connect anything except an approved Rane power supply to the Input that looks like a telephone jack on the rear of the DA 26 This is an AC Input and requires specific voltage and current This is not a good place to experiment or improvise Use only the supply sent with your DA 26 SETUP amp OPERATION The 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 p Connect a balanced line level source to the Line Input The Line Input accepts an unbalanced Input connected to and GND We do not recommen
13. vides a 5 volt reference voltage REF a control voltage input Vc and a ground reference Gain control law is 50 mV dB See Setup and Operation step 6 for details Chassis ground point A 6 32 screw is used for chassis grounding purposes If after hooking up your system it exhibits excessive hum or buzzing there is an incompatibility in the grounding configuration between units somewhere Your mission is to discover how your particular system wants to be grounded Here are some things to try Try combinations of lifting grounds on units that are supplied with ground lift switches or links If your equipment is in a rack verify that all chassis are tied to a good earth ground either through the line cord grounding pin or the rack screws to another grounded chassis Units with outboard power supplies such as the DA 26 do not ground the chassis through the line cord Make sure that these units are grounded either to another chassis which is earth grounded or directly to the grounding screw on an AC outlet cover by means of a wire connected to a screw on the chassis with a star washer to guarantee proper contact If you are connecting the DA 26 Outputs directly to a power amplifier be sure to connect a ground wire to the amplifier chassis N w Refer to the RaneNote Sound System Interconnection supplied with this manual for further grounding information Remote POWER supply input The DA 26 is supplied from the fact
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