Rolls DB24 User's Manual
Contents
1. DB24 Stereo Direct Interface Two channel transformer isolation device Passive no power required Stereo RCA 1 8 3 5mm and dual 1 4 Inputs Balanced XLR Outputs Individual variable attenuators The DB24 is an ideal impedance matching device for connecting any unbalanced stereo signal to a balanced system Consumer audio equip ment such as CD players DVD players MP3 players etc may be easily connected to a professional audio system DB24 St Direct Interface Rolls Corporation Salt Lake City UT 6 9 07 10 75889 00240 DB24 Stereo Direct Interface Interface DB24 RIGHT MONO INPUT LEFT STEREO INPUT S LEFT STEREO RIGHT LEVEL INPUT INPUT LEVEL 9 ROLLS DB24 35 35 50 A 25 R O Vas 60 20 60 20 Left St Right L Ster Level IN Level R Mon SPECIFICATIONS Input Impedance 20k 600 Ohms Frequency Response 50 15kHz 3 dB Output Impedance 600 Ohms Max Output Level 4 dBm Connectors 2 ea XLR Male 1 Stereo RCA 1 1 8 3 5mm TRS 2 ea 1 4 TRS Controls 2 ea Variable attenuators 2 ea Ground Lift switches Weight 1 5 Ibs Dimensions 3 42 w x 1 45 h x 3 325 d Quick Start Guide INTRODUCTION Thank you for purchasing the DB24 Stereo Direct Interface This sturdy device is designed and manufactured to the most demanding specifications in order to provide years of faithful survice The DB24 converts high impedance audio signals to low2. K X 600 ohm w 1K T XLRJACKM O swe GROUNDILIFT SPST L Rolls Corporation 5968 So 350 West Murray Utah 84107 J6 PHONE 1 4 L p RIGHT MONO DB24 STEREO DIRECT INTERFACE Document Number Rev Ba DB24 SCH A Date 25 JUNE 2010 Sheet 1 of 1
3. impedance via Rolls proprietary audio transformers and a variety of inputs DESCRIPTION FRONT PANEL ROLIS DB24 35 35 50 Nos O I 25 60 20 60 20 Left St Right L Ster Level IN Level R Mon L Ster 1 4 Tip Ring Sleeve jack for connection to a Left portion of a signal or a Tip Ring Sleeve Stereo signal Left Level Adjusts the input level to the Left channel L amp R Stereo RCA jacks for connection to an unbalanced stereo signal Note The Right and Left jacks may be used individually as well NOTE The Red RCA jack connects to the Right Out and the White RCA jack connects to the Left Out St IN 1 8 3 5mm Tip Ring Sleeve jack for connection to an unbalanced Stereo signal only Right Level Adjusts the input level to the Right channel R Mon 1 4 Tip Sleeve jack for connection to the Right portion of a stereo signal or to a Mono signal REAR PANEL Stereo Mono When in stereo the units left and right are separet When in Mono The left and right inputs are combined together In mono mode you can plug a single left or right input into the DB24 and you will get output from both left and right Ground Lift Labeled gnd lift When positioned to the side of the switch labeled lift the shield of the XLR plug is separated from the ground pin pin 1 Left Right OUT Balanced XLR jacks for connection to mixer inputs amplifiers etc This will effect both left and
4. right channels CONNECTION OPERATION 1 4 Jacks Stereo Operation A Individual Right and Left connections Connect Tip Sleeve 1 4 plugs to the Right and Left Input jacks B Stereo Tip Ring Sleeve connection Connect a Tip Ring Sleeve 1 4 plug to the Left Stereo Input jack IMPORTANT NOTE Connecting a Tip Sleeve MONO plug into this jack with nothing connected to the Right Mono Input will result in the Right Mono Input being shorted to ground 1 4 Jack Mono Operation Connect a Tip Sleeve Mono plug to the Right Mono Input 1 8 3 5mm Jack Connect a Tip Ring Sleeve stereo plug into this jack for stereo operation only NOTE Connecting a Tip Sleeve MONO plug into this jack with nothing connected to the Right Mono 1 4 Input will result in the Right Mono Input being shorted to ground RCA Jacks Connect Stereo RCA plugs into these jacks for stereo or dual mono operation Connect XLR outputs to the next device in your signal chain Adjust the Right and Left Level controls for an appropriate input level For ex ample for maximum amount of attenuation least amount of signal turn the Level control to 60 For minimum attenuation maximum signal turn the Level control up to 20 SCHEMATIC J3 PHONE 1 4 d P1 EFT STEREO L A P100K 7 PNe2o i 2 1K UTPUT Jaa p o _ _ alis XLR JACK M o 1 A RCAX2 PC L INPUTS col s SPST W1 MONO STEREO TR2 20
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