Rolls PM351 owner manual Introduction, Inspection, Table of Contents, Specifications

INTRODUCTION

Thank you for your purchase of the PM351 Personal Monitor Station. 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 balanced XLR Instrument Outputs. The instrument input connects to two independent XLR balanced outputs via real audio transformers.

The PM351 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 PM351 to monitor their voices over the musicians.

The PM351 is shipped with an external AC adapter.

INSPECTION

1. Unpack and inspect the PM351 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 pack- ing 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

	This symbol indicates that there are
	important operating and maintenance
1	i n s t r u c t i o n s i n t h e l i t e r a t u r e
	accompanying this unit.

		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)

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 dam-

age:

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 vol- ume level.

3.Have your ears checked by an audiologist on a regular basis. If you experi- ence wax buildup in your ears, stop using the system until an audiologist has examined 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. 6