User manual ROLLS RA62B

[. . . ] 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. [. . . ] Please visit our website at www. rolls. com and click on the Register Your Warranty Here text. Fill out the warranty information to ensure coverage of your new RA62b. If you do not have access to the internet, or do not wish to register your warranty online, complete the Warranty Registration Card and return it to the factory. 1 6 SCHEMATIC INTRODUCTION Thank you for your purchase of the Rolls RA62b Stereo Headphone Amplifier. The ROLLS RA62b is a six-channel headphone/earphone amplifier for professional audio monitoring. It is intended for recording studios, sound reinforcement, and audiophile listening environments where full frequency response signal(s) are to be distributed to up to six individuals. A variety of input options are available including 1/4", RCA, and balanced XLR. Since the MONO/STEREO switch is after the pan control, it will mix 2 MONO signals and their balance can be adjusted with the Pan control. Up to six individual monitor mixes may be listened to via the rear panel insert jacks. The RA62b features a FR4 double sided circuit board, socketed integrated circuits, and painted steel chassis. This manual assumes the user has a basic knowledge of audio electronic equipment. FEATURES · 6: 1/4" Headphone and 6: 1/8" (3/5 mm) Earphone Outputs per channel with Level Controls · 1/4" and 1/8" Outputs may be used simultaneously · 1/4", RCA and XLR Inputs · 6 TRS Stereo Insert jacks for separate use of each channel · Up to 600 mW output per jack - it's loud · Stereo/Mono Switch - allows mixing 2 mono signals · Front and rear panel input jacks · May be used as a six channel Distribution Amplifier · FR4 Double-sided fiberglass epoxy circuit board · Socketed ICs · Made in the U. S. A. WARNING USING THIS SYSTEM AT EXCESSIVE VOLUMES CAN CAUSE PERMANENT HEARING DAMAGE. USE AS LOW A VOLUME AS POSSIBLE In order to use this system safely, avoid prolonged listening at excessive sound pressure levels. Please use the following guidelines established by the Occupational Safety Health Administration (OSHA) on maximum time exposure to sound pressure levels before hearing damage occurs. 90 dB SPL at 8 hours 95 dB SPL at 4 hours 100 dB SPL at 2 hours 105 dB SPL at 1 hour 110 dB SPL at 1/2 hour 115 dB SPL at 15 minutes 120 dB SPL - avoid or damage may occur 5 2 DESCRIPTION FRONT PANEL PAN STEREO INPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT OUTPUT MONO CONNECTION Connect the AC cord to a properly grounded ac outlet. 6 CHANNEL HEADPHONE AMPLIFIER pwr LEVEL LEVEL LEVEL LEVEL LEVEL LEVEL STEREO L R RA62b Determine which input configuration you will use; either discreet right/left, TRS stereo, or mono. For a discreet right/left input configuration, connect a balanced XLR plug containing the "Right" portion of the stereo signal to the Right Main Input. Connect a balanced XLR plug containing the "Left" portion of the stereo signal to the Left Input. For a TRS stereo input configuration, connect a Tip-Ring-Sleeve stereo plug into the front panel STEREO IN input. The Aux Inputs are connected in the same manner as the discreet right/left input configuration listed above. To send a mono signal to the RA62b, connect an XLR jack to either Main Input, or a single 1/4" Tip-Sleeve or RCA plug into either Aux Input input and press in the front panel MONO/STEREO switch. This mono signal will be fed to both the right and left sides of the headphone outputs. Note: Descriptions for Channel One through Channel Six are identical. [. . . ] This is a stereo jack and requires a TRS stereo signal. INSERTS The inserts have been provided so you can directly access each headphone output with its own program material. The inserts require Tip-Ring-Sleeve connectors, with right and left signals on the tip and ring respectively. When these insert jacks are used, the main Right/Stereo and Left/Mono, as well as the Aux Inputs - are disconnected. [. . . ]