Inter-m PP-9213 User manual

PP-9213

Preamplifier

PP-9213 Preamplifier

Contents

Welcome ..................................................................................................................................... 3

Unpacking ............................................................................................................................... 3

Warnings .................................................................................................................................. 3

Operation................................................................................................................................. 5

Features ....................................................................................................................................... 6

Front Panel Controls.................................................................................................................... 7

Connections.............................................................................................................................. 11

Block Diagram .......................................................................................................................... 12

Specifications............................................................................................................................ 13

PP-9213 Preamplifier

Welcome

A personal welcome to you from the management and employees of Inter-M

Thank you for purchasing this fine Inter-M product. All of us here at Inter-M are dedicated

to providing you with the highest quality products and the best value.

We sincerely trust this product will provide you with years of satisfactory service, but if

anything is not to your complete satisfaction, we will endeavor to make things right.

Welcome to Inter-M, and thank you for becoming a part of our worldwide extended

family!

Unpacking

Although your PP-9213 is neither complicated nor difficult to operate, we recommend

you take a few minutes to read this brief manual and familiarize yourself with the

important information regarding product features, setup and operation.

As with most electronic devices, we strongly recommend you retain the original

packaging. In the unlikely event the product must be returned for servicing, the original

packaging (or reasonable equivalent) is required.

Warnings

Environment

Never place this product in an environment that could alter its performance or reduce its

service life. Such environments are usually characterized by high levels of heat, dust,

moisture, or vibration.

Safety

1. Read these instructions carefully.

2. Follow all instructions.

3. Keep all warnings.

4. Do not operate this apparatus near water.

5. Clean only with a damp cloth.

6. Do not block any of the ventilation openings.

7. Install only in accordance with the instructions in this manual.

PP-9213 Preamplifier

8. Do not install near any heat sources such as radiators, heat registers, stoves, or other

devices (including amplifiers) that produce heat.

9. Do not defeat the safety purpose of the polarized or grounding type plug. A polarized

plug has two blades, with one wider than the other. A grounding type plug has two

blades and a third grounding prong. The wide blade or the third prong is provided for

your safety. If the provided plug does not fit into your outlet, consult an electrician for

replacement of the obsolete outlet.

10. Protect the power cord from being walked on or pinched, particularly at plugs,

convenience receptacles, and the point where it is attached to the apparatus.

11. Use only the attachments/accessories specified.

12. Use only with a cart, stand, tripod, bracket, or table specified, or sold with the

apparatus. When a cart is used, use caution when moving the cart/apparatus

combination to avoid overturning.

13. Unplug this apparatus during lightning storms or when unused for long periods of

time.

14. Refer all servicing to qualified service personnel. Servicing is required when the

apparatus has been damaged in any way, such as power supply cord or plug is

damaged, liquid has been spilled or objects have fallen into the apparatus, the

apparatus has been exposed to rain or moisture, does not operate normally, or

has been dropped.

PP-9213 Preamplifier

Operation

Make certain that speakers and input sources are properly connected before switching

on.

Keep volume levels at minimum gain before switching on.

NOTE: The system’s operation is delayed by approximately three seconds after pressing

the AC Mains power switch. This is due to the built-in protection circuitry, designed to

protect speakers and other system components.

PP-9213 Preamplifier

PP-9213

Preamplifier

Features

Rugged, Compact Design

• A versatile, high-performance mixer in a space-saving two RU package.

Flexible Mixing Architecture

• Nine Mono inputs, three Stereo inputs, two Aux inputs, plus one Main output and two

Sub outputs.

Three-Band Channel EQ

• Three-Band EQ control on each channel.

Four-Band Output EQ

• Four-Band EQ control on Master Output.

On-Board Phantom Power

• Built-in +18VDC phantom power for condenser microphones.

AC or DC Operation

• Runs on 100-120VAC, 220-240VAC, or 24VDC for true portability.

PP-9213 Preamplifier

Front Panel Controls

1. Trim Controls 1-9

These knobs control the gain level for the associated input channel.

2. Signal Indicators 1-9

These LED indicators light when signal is present at the associated channel’s input.

3. Peak Indicators 1-9

These LED indicators light when the input signal to the associated channel is 3dB

below clipping. If the indicator is lit steadily, reduce the channel’s Trim level (1) to

avoid distortion.

4. Channel Faders 1-9

These are the main output level controls for each channel. They control the signal

level sent from the associated input channel to the Master Output buss. Faders of

unused channels should be set to their lowest point.

5. Aux Levels 1-2

These knobs control the levels for signals connected to the rear-panel Aux 1 and

Aux 2 inputs.

6. Master Peak Indicator

These LED indicators light when the Master Output signal is 3dB below clipping. If

the indicator is lit steadily, reduce the Master Output level (7), or the levels from

the active input channels (4) to avoid distortion.

7. Master Output Fader

This is the main output level control for the Master Output, and controls the level

appearing at the rear-panel Master Output.

PP-9213 Preamplifier

8. Channel EQ Controls

These knobs control the equalization for the associated Input Channel. Three

bands of equalization are provided:

Low: 100Hz, ±12dB, Shelving

Mid: 1kHz ±12dB, Shelving

High 10kHz ±12dB, Shelving

9. Priority Controls

These knobs control the level of Priority signals, as connected to the rear-panel

Priority 1 and 2 inputs.

10. Master EQ Controls

These knobs control the equalization for the Master Output. Four bands of

equalization are provided:

Low: 80Hz, ±12dB, Shelving

Low-Mid: 400Hz, ±12dB, Shelving

Hi-Mid: 2kHz ±12dB, Shelving

High 10kHz ±12dB, Shelving

11. Sub Output Controls

This knob controls the level of signal connected to the rear-panel Sub Output.

12. Power Switch

Pressing this switch switches the unit on, as indicated by the Power LED in the

switch. Pressing it again switches the unit off.

PP-9213 Preamplifier

Rear Panel Controls

1. Master Output

This is a balanced XLR output jack for connecting to the input of a power amp.

2. Sub Outputs 1-2

These are unbalanced 1/4" phone jack outputs for connecting to the input of a

power amp or other audio input.

3. Priority Inputs 1-2

These are line level inputs on unbalanced 1/4" phone jacks. When signal is present

at these inputs, all other inputs are muted. The level for these inputs is controlled

by the front-panel Priority Level control (9).

4. Aux Inputs 1-2

These are line level inputs on unbalanced 1/4" phone jacks. Their level is

controlled by the front-panel Aux Level controls (5).

5. Mic Inputs 1-9

These are mic-level inputs on balanced three-pin XLR connectors. Their level is

controlled by the front-panel Trim controls (1). Phantom power is supplied to these

inputs with the rear-panel Phantom Power switch (13).

6. AC Connector and Fuse Holder

Connect the supplied standard AC input cable to this input. The fuse holder

below the input contains the AC overload protection fuse. If the fuse has blown

out, replace it with a fuse of the same type and rating. If the fuse continues to

blow, refer servicing to a qualified service technician.

7. Rec Output

This is an unbalanced line-level output on 1/4" phone jack, for connection to an

external recording device.

PP-9213 Preamplifier

8. Insert

This is an unbalanced line-level input on 1/4" phone jack, provided for connecting

external devices to the mixer’s outputs. Inserting a connector into the Insert jack

will disconnect the output of the mixer’s Master Output buss.

9. DC Input Terminals

These terminals are provided for the connection of 24VDC power source, such as

the Inter-M PD-9211 or Inter-M PD-9359. Connect a 24VDC battery source to these

terminals. Make certain the red terminal is connected to the battery’s positive (+)

side, and the black terminal to the battery’s negative (-) side.

10. Stereo Line Inputs 7-9

These are line-level inputs on unbalanced RCA connectors. These are provided as

three sets of stereo inputs, for the connection of line-level input sources.

11. Mono Line Inputs 1-6

These are line-level inputs on balanced 1/4" connectors. These are provided as six

mono inputs, for the connection of line-level input sources.

12. Priority Switches

When the Priority Switches are activated, signal to the associated Mic Inputs 1

and 2 will automatically lower the gain level of the other input channels.

13. Phantom Power Switches

Pressing these switches activates the +18VDC phantom power supply to

associated Mic Inputs 1 and 2, for use with condenser mics requiring external

power. Push this switch again to switch off Phantom Power.

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