Rolls PM350B - Manual (Page 2)

INTRODUCTION
Thank you for your purchase of the PM350b Personal Monitor Mixer Plus.
This unit mixes a microphone signal with a 1/4" Tip-Ring-Sleeve stereo or
mono instrument level signal and a 1/4" TRS stereo or mono monitor
signal. The Mic Input and Thru jacks have a switchable ground lift, as do
the 1/4" TRS Instrument Outputs. The instrument input connects to two
independent 1/4" TRS balanced outputs via electronic balancing circuits.
The PM350b is designed for performers who want to monitor their own
sounds, such as their vocals and instruments, with the main mix via
headphones or earphones. It's very popular with drummers who need to
mix a click track with a monitor signal. Church choir singers love the
PM350b to monitor their voices over the musicians.
The PM350b is shipped with an external AC adapter.
INSPECTION
1. Unpack and inspect the PM350b box and package.
If obvious physical damage is noticed, contact the carrier immediately to
make a damage claim. We suggest saving the shipping carton and
packing materials for safely transporting the unit in the future.
2. Please complete the Warranty Registration Card and return it to the
factory.
TABLE OF CONTENTS
INTRODUCTION 1
INSPECTION 1
TABLE OF CONTENTS 1
DESCRIPTION 2
CONNECTION 3
OPERATION 4
SCHEMATIC 5
SPECIFICATIONS 6
WARRANTY BACK COVER
SPECIFICATIONS
Max Input Level: -20 dB XLR, +40 dB Line, +15 dB Instrument
Inst. Input Impedance: 50K ohms
Inst. Output Freq. Response: 10 - 30 kHz +/- 3 dB
Output Impedance, Hdphn: 10 ohms
Output Impedance, Inst.: 2 ea; 100 ohms balanced
Gain: 20 dB 1/4", 50 dB XLR
Hdphn Freq. Response: 20 - 20 kHz
S/N Ratio: 90 dB
Power: 9 - 16 VDC
Size (W x H x D): 4.5" x 3.3" x 1.5"
Weight: 1 lb (.45 Kg)
1 6
This symbol indicates that there are
important operating and maintenance
instr uctions in the literature
accompanying this unit.
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 Occupa-
tional 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
It is difficult to measure the exact Sound Pressure Levels (SPL) present at the
eardrum in live applications. In addition to the volume setting on this Personal
Monitor unit, the SPL in the ear is affected by ambient sound from floor wedges
or other devices. The isolation provided by the fit of quality earphones is also an
important factor in determining the SPL in the ear.
Follow these guidelines in the use of this product to protect your ears from
damage:
1. Turn up the volume only to the point where hearing is comfortable.
2. Ringing in the ears may indicate that the levels are too high. Lower the volume
level.
3. Have your ears checked by an audiologist on a regular basis. If you experience
wax buildup in your ears, stop using the system until an audiologist has exam-
ined your ears.
4. Wipe the earphones with an antiseptic before and after use to avoid infections.
Stop using the earphones if they are causing great discomfort or infection.