User manual ROLLS ADB2 9/95

[. . . ] 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. [. . . ] Some states do not allow the · Ground Lift for "hum" reduction exclusion or limitation of special, incidental or consequential damages so · Attenuator switch for connecthe above limitation or exclusion may tion to line level or speaker level not apply to you. This warranty gives signals you specific legal rights, and you may also have other rights which vary from state to state. The ADB2 is an active direct box for converting a high impedance signal such as a direct out from a bass amplifier, to a low impedance signal such as a snake input and a mixer's microphone input. The Ground Lift is provided to reduce possible ground hum or buzz. ADB2 PHANTOM Direct Box PHANTOM INPUT ADB2 Active Direct Box DIRECT BOX ADB2 OUTPUT ATTENUATOR 0 dB -40 dB GROUND LIFT -20 dB GND LIFT Rolls Corporation Salt Lake City, UT 9/95 Owners Manual Congratulations and thank you for your purchase of the ADB2 Phantom. The ADB2 is designed to provide lasting value and usefulness. It is intended for sending unbalanced signals (up to +40 dB) to a mixing console or other professional input device. The unit has no transformer, so stray field pickup is nonexistent. The ADB2 is powered by standard microphone phantom power from 9 - 48 VDC and uses discrete low-noise differential drivers to make it very quiet. The unit has two 1/4" input jacks wired in parallel, a male XLR output jack, a ground lift switch, and a threeposition attenuator switch. DESCRIPTION INPUTS: Two 1/4" unbalanced jacks - wired together in parallel. For connection to line or instrument level signals. OUTPUT: One male XLR jack for connection to mixing console or other input device carrying phantom power. [. . . ] Use the lowest attenuator setting that gives distortion free sound. The ground lift switch should be in the position that yields the lowest noise. SPECIFICATIONS Input Level: Output Level: Bandwidth: S/N Ratio: Jacks: Conrols: Power: Size: -10 to +40 dB unbalanced -10 to +2 dB balanced XLR Male (pin 2 +) 1 Hz to 50 kHz 100 dB (2) 1/4" phone, (1) XLR male Attenuator switch, Ground Lift switch, 9 - 48 VDC Phantom Powered 2" x 3. 5" x 5" ATTENUATOR SW1A ALPHASW 3 J1 PC 1/4 6 R5 10K SW1B ALPHASW 4 R9 1M 2 1 R7 100K 5 7 R8 8 PN4857 Q2 Q1 PN4857 2 J3 XLR M PC 10K R3 1M R4 R2 3. 3K R1 3. 3K 1M R6 10K 3 J2 PC 1/4 1 1 SW2 SPST 3 2 GROUND LIFT PHANTOM INPUT DIRECT BOX ADB2 OUTPUT ROLLS CORPORATION Title ADB2 PHANTOM DIRECT BOX Size A Date: July 18, 1994 Document Number ADB2. SCH Sheet of REV B ATTENUATOR 0 dB -40 dB GROUND LIFT -20 dB GND LIFT [. . . ]