MB15b ProMatch - Audio/video converter ROLLS - Free user manual and instructions

Product Type	Audio/Video Converter
Brand	Rolls
Model	MB15b ProMatch
Input Connectors	Unbalanced RCA (stereo pair)
Output Connectors	Balanced XLR (stereo pair)
Frequency Response	20 Hz – 20 kHz
Signal-to-Noise Ratio	> 90 dB
Power Supply	9V battery (internal) or 9V DC external adapter (center positive, 2.1 mm barrel)
Dimensions (H x W x D)	1.5 x 5.5 x 3.5 in (38 x 140 x 89 mm)
Weight	1 lb (0.45 kg)
Construction	Steel chassis with black finish
Controls	Input level knob, ground lift switch, power LED
Main Function	Converts unbalanced stereo audio to balanced stereo audio with ground lift option
Care & Cleaning	Wipe with a soft, dry cloth. Avoid solvents.
Safety Precautions	Use only specified power supply. Do not expose to moisture.
Spare Parts & Repairability	No user-serviceable parts inside. Contact Rolls for service.
Warranty	1 year limited warranty

Frequently Asked Questions - MB15b ProMatch ROLLS

How do I connect the MB15b ProMatch?

Connect your unbalanced source (e.g., mixer, CD player) to the RCA input jacks. Connect the XLR outputs to your balanced input device (e.g., powered speakers, audio interface). Ensure the ground lift switch is set appropriately to avoid hum.

What power options are available?

The MB15b can be powered by a 9V battery (not included) or an external 9V DC power supply (center positive, 2.1 mm barrel, not included). Battery life is approximately 20 hours.

When should I use the ground lift switch?

Use the ground lift switch when you encounter a ground loop hum or buzz in your audio signal. Lifting the ground disconnects the input ground from the output ground, which can eliminate unwanted noise.

Why is there no sound or very low volume?

Check that the input level control is turned up. Verify all cables are fully inserted and not damaged. Ensure the source device is outputting signal. If using a battery, test with a fresh battery or external power supply.

Can I use the MB15b with a microphone?

No, the MB15b is designed for line-level signals only. Microphone signals require a preamp. Connecting a mic directly may result in very low or no output.

What is the maximum input level?

The MB15b can accept input levels up to +20 dBu without distortion. For higher levels, use an attenuator.

How do I clean the unit?

Disconnect all cables and power. Wipe the exterior with a soft, dry cloth. Do not use any liquids or abrasive cleaners.

Is the MB15b compatible with 75-ohm video signals?

No, the MB15b is intended for audio signals only. It does not support video signals despite the 'audio/video converter' category. Use a dedicated video balun for video.

What should I do if the unit gets hot?

Ensure adequate ventilation around the unit. Do not stack other devices on top. If the unit becomes excessively hot, turn it off and contact Rolls support.

Where can I find the user manual or support?

The user manual is available for free download on the notice-facile.com website. For technical support, visit the Rolls Corporation website or contact their support team.

USER MANUAL MB15b ProMatch ROLLS

The purpose of the MB15b is to connect consumer level equipment to professional level equipment. Consumer level signals typically come from devices such as phones, tablets, CD play-ers and DVD players. Professional level signals are associated with devices found in recording studios and sound reinforce-ment systems like mixing boards, signal processors, and their associated ampili-hers.

CONSUMER LEVEL VS PROFESIONAL LEVEL:

What's in the box?

1 - Made in USA MB15b

1 - 15V power supply PN PS27s

1 - This owners manual

Rolls Corporation Salt Lake City, UT 9/18

ROLLS

- 1/8" Headphone level to line level adaptor - Works as stereo balanced line level control - Stereo Level control for each channel - Stereo RCA to stereo XLR - Stereo Direct Box

MIB15b PROMATCH The MB15b converts stereo consumer level signals to professional line signals - and vice versa. It may also serve as a balanced, in line, level control by patching the four RCA jacks together.

... Anywhere you need to convert consumer-level audio to pro-level and/or vice-versa.

- Broadcast

- install

- Studio

ROLLS

MB15b ProMatch

SPECIFICATIONS:

Max Out: Bal: +18 dB

Unbal: +12 dB

Max In: Bal: +22 dB

Unbal: +22 dB

Input Impedance: RCA : 100k Ohm

XLR: 10k Ohm

1/8" stereo: 10k Ohm

Output Impedance: RCA: 100 Ohm

XLR: 100 Ohm balanced

Noise Floor: -88 dB

Power: 15 VDC adapter (center negative)

Weight: 1 lbs. (.45 Kg)

Size: 4.15" x 2.46" x 1.55"

Connection guide

The MB15b is essentially two units in one chassis. Channel 1 takes XLR inputs and converts them to RCA outputs. Channel 2 takes an RCA or 3.5mm stereo input, and converts it to XLR output. With the addition of an RCA output on channel 2.