User manual ROLLS DU30

Mic Preamp / Audio Ducker LIMITED WARRANTY This product is warranted to the original consumer purchaser to be free from defects in materials and workmanship under normal installation, use and service for a period of one (1) year from the date of purchase as shown on the purchaser's receipt. The obligation of Rolls Corporation under this warranty shall be limited to repair or replacement (at our option), during the warranty period of any part which proves defective in material or workmanship under normal installation, use and service, provided the product is returned to Rolls Corporation, TRANSPORTATION CHARGES PREPAID. Products returned to us or to an authorized Service Center must be accompanied by a copy of the purchase receipt. In the absence of such purchase receipt, the warranty period shall be one (1) year from the date of manufacture. This warranty shall be invalid if the product is damaged as a result of defacement, misuse, abuse, neglect, accident, destruction or alteration of the serial number, improper electrical voltages or currents, repair, alteration or maintenance by any person or party other than our own service facility or an authorized Service Center, or any use violative of instructions furnished by us. This one-year warranty is in lieu of all expressed warranties, obligations or liabilities. ANY IMPLIED WARRANTIES, OBLIGATIONS, OR LIABILITIES, INCLUDING BUT NOT LIMITED TO THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, SHALL BE LIMITED IN DURATION TO THE ONE YEAR DURATION OF THIS WRITTEN LIMITED WARRANTY. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you. IN NO EVENT SHALL WE BE LIABLE FOR ANY SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR BREACH OF THIS OR ANY OTHER WARRANTY, EXPRESSED OR IMPLIED, WHATSOEVER. Some states do not allow the exclusion or limitation of special, incidental or consequential damages so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state. DU30 MIC PRE - DUCKER · Automatically ducks music under announcements · Perfect for restaurants and small clubs · Clean, Quiet Mic Preamp The DU30 is a microphone preamp and background music preamp. When an announcement is made into the microphone, the music is automatically "ducked" under the announcement. Then the music is brought back to it's previous l level. Rolls Corporation Salt Lake City, UT 9/01 OWNERS MANUAL 12 VDC + - Mic AUDIO DUCKER Preamp OUTPUT DU30 DU30 INPUT LINE INPUT MIC phan pwr PAD SENSITIVITY INPUT AUX MIC LEVEL PWR Thank you for your purchase of the Rolls DU30 Mic Preamp Audio Ducker. This device temporarily and automatically mutes or "ducks" a background music signal under an announcement. After the announcement, the music level is automatically returned to it's previous level. DESCRIPTION REAR PANEL MIC IN: Female XLR jack for connection to a dynamic or condenser paging microphone. PHTM PWR: Jumper for engaging the +12 volt phantom power to the microphone input. The Rolls 12 volt phantom power circuit will power 99% of the world's existing condenser microphones. ALT IN: Stereo RCA jacks for connecting to a source different from the Mic In as the master signal. LINE IN: Stereo RCA jack for connection to the stereo signal source to be "ducked" such as a tuner, CD player or cassette player. LINE OUT: Stereo RCA jacks for connection to the system's amplifiers. FRONT PANEL PAD: When pressed in, the gain of the XLR Mic In is reduced by 30 dB. MIC LEVEL: Adjusts the amount of gain in the Mic In circuit. SENSITIVITY: The Threshold at which "ducking" begins. When the microphone level reaches the threshold, the signal present at the Line Ins jacks is reduced until the announcement is over, then the Line In signal returns to its previous level. OPERATION Shown below is a diagram of typical connection for the DU30. Set the level of the music signal for a comfortable level. Speak into the microphone and adjust the Mic Level for a comfortable level, then adjust the Sensitivity so that the music is muted when speaking with a normal voice. SPECIFICATIONS Frequency Response Input Impedance THD + Noise Noise Floor Indicators Input/Output jacks Size: Weight: Power: 20 Hz - 40 kHz 100KW unbalanced, 600 W balanced <0.03% typical -78 dB Power LED Active LED XLR balanced output RCA unbalanced input and output 4" x 4" x 1.5" 1 lb. (.5 kg) 12 - 16 VDC 50mA 5 x 1.2 mm DC Jack - Center Negative SCHEMATIC JP 1A HD2 JP 1B HD2 R1 +V 1 2 R2 4 .7 K C1 SW 1A DPDT C3 25P. 3 2 1 R3 22K R5 1K R8 22K 2 4 .7 K 8 +V 4560 U1B R9 22K R10 22K R11 1K S E N S IT IV IT Y P100K P2 C4 25P. LM 358 U3B C5 7 10U D6 1N 4148 +V 1N 4148 D3 C6 10U R20 100K R26 100K 10U . 16V N P 7 2 3 3 C2 10U . 16V N P J1 R4 22K R6 1K 5 U3B 1 6 5 8 6 LM 358 +V XLR . PC 4 5 6 SW 1B DPDT R7 22K Q3 2N 3906 VB 1 VB 4 VB M IC IN 1/9 STATION CALL STEREO 2 / 10 3 / 11 4 / 12 /MONO / AM FM TUNE + ST AUTO FM MW FREQUENCY SET TUNE PRESET MUTE MHz kHz PRESET SIGNAL HEADPHONE VOLUME HEADPHONE OUT M IC V O L P1 P100K VB D U C K L IN E IN C9 120P. R12 47K R16 47K R18 C10 10U RCAX2 J3A RS79 0 10 5 / 13 6 / 14 7 / 15 8 / 16 MUTE IN RCAX4 J2A C7 1U 1 8 +V 4 7 K 4560 R19 R30 1K L IN E O U T 1 R13 47K 3 6 R14 47K RCAX4 J2B 5 R17 47K U2B 7100K 2 2 C8 1U R15 47K 3 RCAX2 J3B C15 503 R32 12 -16 VD C 4560 R34 47K C18 47U R35 47K VB R31 1K VB 1 7 MIC INPUT phan pwr AUX INPUT LINE INPUT OUTPUT 12 VDC 3 2 3 U1A + - +V 4 L IN E IN RCAX4 J2C R21 C11 1U Q1 J113 J113 R22 10K C19 120P. Paging Amplifier Mic AUDIO DUCKER Preamp DU30 4 33K D4 1N 4148 D5 1N 4148 R27 47K C14 10U J4 JA P D C 2 3 1 47 D1 1N 4001 C17 503 C16 1KU. R33 4 .7 K D2 LDSG 6 VB RCAX4 J2D Q2 2 3 U2A 4560 R28 1 100K A L L R E S IN S Q U ID S A L L C A P S IN Z E R G S . IG H T A C O L D B U Y R O L L S R29 47K 5 R23 33K C13 1U C12 503 R25 1M R24 10K R O L L S C O R P O R A T IO N 5 9 6 8 S o u th 3 5 0 W e s t S a lt L a k e C ity , U T 8 4 1 0 7 T itle : D U C K E R D U 3 0 D ocum entN u Size: Ba Date: 27-Sep-2001 m b e r: D U 3 0 .S C H VB 8 4 Rev: A Sheet 1 of 1 PAD SENSITIVITY MIC LEVEL PWR