Roll Music Systems RMS755 Bedienungsanleitung

USERS

MANUAL

ROLL MUSIC SYSTEMS INC

2010 EAST HENNEPIN AVENUE #33

MINNEAPOLIS MN 55413

612-379-3255

WWW.ROLLMUSIC.COM

Input channels:

Input impedance:

Maximum input level:

Output channels:

Output impedance:

Maximum output level:

Frequency response:

Crosstalk @1kHz:

Power requirements:

Two

40k ohms balanced

>+23dBu rms

Two

100 ohms balanced

>+29dBu rms

12Hz-32kHz +/-0.25dB

2Hz-150kHz +/-3dB

< -90dB

117VAC/0.160A

230VAC/0.080A

Technical Specifications

(Configured internally by qualified service technician)

1.Power Switch.Afterconﬁrmingandconnectingthecorrectmains

 voltage,pushswitchuptoengagepower.

2.Threshold.Continuouslyvariablecontrolofthresholdlevel,above

 whichgainreductionbeginstooccur.Exactthresholdleveldepends

 onthesettingsoftheothercontrols.

3.Sidechain Hi-Pass Filter.Pushbuttonswitchremoveslow-frequency

 informationfromthecontrolsignal.Thiscanpreventunwanted

 “pumping”onbassnotes,suchaskickdrum.Filterisfactoryconﬁgured

 for150Hzcornerfrequency.Pressbuttonintoengageﬁlter.

4.Ratio.4-positionrotaryswitchselectsoneoffourcompressionratios:

 1.5:1;2:1;4:1;or10:1.Changingtheratiowillautomaticallyadjust

 thethresholdsothatthetotalamountofgainreductionwillremain

 approximatelythesame,allowingformoremeaningfulcomparisonof

 theaudibleeﬀectsofdiﬀerentratiosettings.

5.Attack Time.10-positionrotaryswitchselectsoneoftenattacktime

 settings.Thiscontrolshowquicklygainreductionbeginstooccur.A

 slowerattacktimewillallowmoretransientstobepassedwithoutgain

 reduction;afasterattackwilltendtoreducetransientlevels.Awide

 rangeoftonalvariationispossibleasaresult.Attacktimesare

 approximateandaremeasuredinmilliseconds.

6.Release Time.10-positionrotaryswitchselectsoneoftenrelease

 timesettings.Thiscontrolshowquicklyfullsignallevelisrestored

 aftergainreductionoccurs.Afastreleasetimewillincreasethe

 audibilityofthesustain,decay,andreverberantportionsofthesound.

 Aslowerreleasewilltendtobelessnoticeableonfullprogrammaterial.

 Releasetimesareapproximateandaremeasuredinseconds.

7.Program-Dependent Release.PushbuttonswitchactivatesProgram

 DependentReleaseTimemode.Thismodefeaturesadualrelease

 characteristicwhichoﬀersaslowerrecoveryfromlongpassagesof

 above-thresholdsignalaswellasafasterrecoveryfromshorttransients.

 TheReleaseTimecontrolswitchcontinuestofunctioninthismode,

 aﬀectingthe“short”portionofthereleasecharacteristic.However,the

 releasetimesprintedonthefaceplatearenotaccurateinPDRmode.

8.Makeup Gain.Continuously-variablecontrolofoutputgainappliedto

 allsignal,indepentlyofanygainreductionoccurring.Rangeofthegain

 controlis-14dBto+20dB.Sincethisgainisappliedafterthecom-

 pressioncircuitry,itispossibletocauseoutputclippingbyexcessive

 clockwiserotationoftheGaincontrol.

9.Bypass.Pushbuttonswitchbypassesallcircuitry.Thisisatruehard-

 wirebypass,sothereisnoactivecircuitryinthesignalpathwhenthe

 bypassswitchisengaged.Itisequivalenttounpluggingtheinputand

 outputXLRcablesfromtheunitandconnectingthemtooneanother.

10.Gain Reduction Meter.Displaysinstantaneousdegreeofgain

 reductioninDecibels.MeterisnotaﬀectedbyappliedMakeupGain.

1. Mains power connector and fuse holder. Mainspowerisappliedvia

 astandardIEC3-prongpowercord(included).Mainsvoltageisselected

 internallyatthefactoryfor117VACor230VACnominalmains,andcan

 bereconﬁguredinternallybyaqualiﬁedservicetechnician.Connectthe

 powercordonlytoaproperlygroundedoutletofcorrectmainsvoltage.

2. Balanced XLR audio input connectors. StereoAudioinputisona

 pairofelectronicallybalancedXLR-Fconnectorswithdiﬀerentialsignal

 betweenpins2and3(pin1connectstochassisground).Unbalanced

 sourcesshouldbeconnectedbetweenpins2and1.

3. Balanced XLR audio output connectors. StereoAudiooutputisona

 pairofelectronicallybalancedXLR-Mconnectorswithdiﬀerentialsignals

 betweenpins2and3.Unbalancedloadsshouldbeconnectedbetween

 pins2and1,withpin3leftunconnected.Donotgroundtheunusedpin.

RMS755SUPERSTEREOCOMPRESSORFRONTPANELCONTROLFEATURES

REARPANELCONNECTIONDIAGRAM

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