User manual ROLLS DB25

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 · Converts high-impedance to lowFOR BREACH OF THIS OR impedance & vice-versa ANY OTHER WARRANTY, · Ground Lift for "hum" reduction EXPRESSED OR IMPLIED, WHATSOEVER. Some states do · Attenuator switch for connection not allow the exclusion or to line level or speaker level limitation of special, incidental or consequential damages so the signals above limitation or exclusion The DB25 is a passive direct box may not apply to you. This for converting a high impedance warranty gives you specific legal signal such as a direct out from a rights, and you may also have bass amplifier, to a low impedance other rights which vary from state signal such as a snake input and a to state. mixer's microphone input. The Ground Lift is provided to reduce possible ground hum or buzz. DB25 MATCHBOX Direct Box MATCHBOX DB25 OUT LIFT DB25 Matchbox IN ATTENUATOR 0 dB -40 dB GROUND LIFT GND -20 dB Salt Lake City, Utah 8/99 Owners Manual INTRODUCTION Thank you for your purchase of the DB 25 MATCHBOX, a passive direct box designed to take high impedance signals and convert them to low impedance. The unit features an Attenuator switch for padding the input signal by either 20 or 40 dB, and a Ground Lift switch which may reduce unwanted hum caused by "ground loops". DESCRIPTION Input Jacks: 1/4" unbalanced jacks for receiving line or instrument level signals. Attenuator switch: Reduces the input signal by the amount indicated. Ground Lift Switch: In the "Lift" position, the ground connection of the XLR jack is disconnected from the chassis. Output Jack: XLR balanced jack for connection to a mixing board or other balanced input device. SPECIFICATIONS Frequency Response: Output Impedance: Input Impedance: Max Output Level: 50 - 15kHz +/- 3 dB 600 50K +4 dBm J1 PHONE 1/4 T1 SW1A J2 PHONE 1/4 3 ALPHASW 0 Db -20 4 2 1 -40 R2 100K R3 1K R1 10K 5 7 8 1 3 DPDT 6 SW1B ALPHASW 3 50K - 600 CT 2 J3 XLR M PC SW2A 2 LIFT 1 ROLLS CORPORATION Title MATCHBOX DB25 OUT LIFT DB25 MATCHBOX Size A Date: December 22, 1992 Document Number DB25.SCH Sheet of REV IN ATTENUATOR 0 dB -40 dB GROUND LIFT GND EXAMPLE APPLICATIONS 0 dB Setting MATCHBOX DB25 BASS GUITAR OUT LIFT IN ATTENUATOR 0 dB -40 dB GROUND LIFT GND -20 dB -20 dB SPEAKER OUTPUT IN -40 dB Setting MATCHBOX DB25 OUT LIFT MIXING BOARD ATTENUATOR 0 dB -40 dB GROUND LIFT GND -20 dB AMPLIFIER