User manual ROLLS MB15B

[. . . ] For compete information on the Rolls 1 Year Warranty, and to register this product, see our web site at www. rolls. com. DESCRIPTION REAR PANEL +4 dB IN LEFT and RIGHT XLR jacks: Female XLR jacks to be connected to the output of a professional line-level device such as a sound reinforcement mixing board or recording device. [. . . ] LEVEL 1: Adjusts the signal level of channel one, or the +4 dB IN to -10 dB OUT channel. LEVEL 2: Adjusts the signal level of channel two, or the -10 dB IN to +4 dB OUT channel. 1/8" Stereo input: For connection to the output of a headphone level such as a computers headphone output or mixers headphone output. 12 VDC jack: For connection to the Rolls PS27 12 Volt DC power supply. The outside of the jack (barrel) is positive, the inside is negative. CONSUMER LEVEL VS PROFESSIONAL LEVEL The purpose of the MB15b is to connect consumer level equipment to professional level equipment. Consumer level signals typically come from devices such as camcorders, cassette decks, CD players, and home video players. Professional level signals are associated with devices found in recording studios and sound reinforcement systems like mixing boards, signal processors, and their associated amplifiers. The MB15b converts stereo consumer level signals to professional line level signals - and vice versa. It may also serve as a balanced inline level control by patching the four RCA jacks together. - Stereo Direct Box - Stereo RCA to stereo XLR - Stereo Level control for each channel - Works as stereo balanced line level control - 1/8" Headphone level to line level adaptor SPECIFICATIONS Max Out: Max In: SCHEMATIC +VB R4 10K 1% R2 10. 0K 1% 5 3 C1 1U R1 10. 0K 1% +VB +4 INPUTS 2 C4 1U R8 10K 1% R7 10. 0K 1% 3 XLR F PC 1 1U C3 R6 10. 0K 1% 3 2 U1A 4560 1 1U 4 P1B 4 C14 6 USB IN R26 10K 5 5 R25 100 6 BROWN RCAX4 J6D RIGHT OUT +12 8 R12 10K 4560 6 5 +VB P2A P100K X2 1 C16 120PF U2A 4560 4 R19 10K C15 5 120PF 4560 U3A 1 6 5 +VB U3B 1 R16 10K R9 47 4560 7 R20 47 C11 47U 3 +4 OUTS 2 C12 47U RCAX2 J8A 2 1 R10 47K J2 XLR JACK M 1 2 U2B 7 J8B LINE OUTS 2 R15 47 -10 OUTS R14 10K 6 +12 8 4560 U1B 7 1U R3 10K 1% C13 3 P1A USB IN R24 10K 2 4 100 R18 RED RCAX4 J6C LEFT OUT 6 C2 1U J1 2 Input Impedance: 3 R13 47 C8 47U XLR F PC 1 P100K X2 1 J4 2 C9 47U RCAX2 J3 XLR JACK M 3 R11 47K 1 Output Impedance: Noise Floor: Gain: THD: Power: Weight: Size: P100K X2 J7 3. 5STJK R5 10K 1% C17 1U BLACK USB OUT 3 R11 4. 7K LEFT IN C5 RCAX4 1U J6B 2 C18 1U 2 R18 4. 7K 3 R10 +VB 47K -10 INPUTS/HDPHN IN 3 1 J6A RCAX4 C6 1U WHITE USB OUT 1U C20 3 RIGHT IN 6 R174. 7K P2B P100K X2 4 +12 8 R28 4. 7K 2 3 GREEN USB GND +12 PWR D1 1N4001 2 3 1 JAPDC C7 1K UF R21 18K +VB R22 22K R23 4. 7K C19 . 047 D2 LDRR 4 BLUE USB PWR N/C MB15b has NO usb function +12 J5 14 - 24 VDC TIP NEG BARRELL POS. C10 47U ROLLS CORPORATION 5968 S 350 W MURRAY, UT PROMATCH II MB15b/MB35 Size: Ba Date: Document Number: MB35. SCH Rev: A Sheet 1 of 1 84107 14 March 2008 MB15b ProMatch MB15b ProMatch MB15b ProMatch MB15b PROMATCH www. rolls. com MB15b ProMatch Bal: +18 dB Unbal: +12 dB Bal: +22 dB Unbal: +22 dB RCA : 100k Ohm XLR: 10 k Ohm 1/8" stereo: 10k Ohm RCA: 100 Ohm XLR: 100 Ohm balanced -88 dB +4 dB In: -8 dB -10 dB In: + 20 dB . 003% 12 VDC adapter (center negative) 1 lbs. [. . . ] Specifically, the MB15b converts consumer level stereo RCA signals to balanced XLR professional line level - and back. [. . . ]