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Manuals
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Yamaha Manuals
Amplifier
P1250
Operating manual
Yamaha P1250 Operating Manual
Yamaha p1250: user guide
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Also See for P1250
:
Operating manual
(44 pages)
,
Service manual
(33 pages)
,
Service manual
(21 pages)
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Table Of Contents
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Contents
Table of Contents
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Table of Contents
How to Use this Manual
Table of Contents
Product Overview
Brief Operating Instructions
Front Panel
Input Attenuators
Input Level Indicators (Signal, Clip)
Hint Regarding Turn-On of the Power Amplifier
Rear Panel Facilities
Input Connections
Mode Switch (Mono/Stereo)
Speakers Output Connections
Fuse
Amplifier Operation
Precautions Regarding AC Power Source for Amplifiers
Installation
XLR Connectors and Phone Jacks
Output Connections
Normal Output Connections
Mono Mode Connections
More Information on Sound System Wiring
Balanced and Unbalanced Wiring
Why Input Transformers Sometimes Are Used
Noise and Losses in Low Impedance and High Impedance Lines
Signal Levels, Dynamic Range and Headroom
Standard Operating Levels
Speaker Level and High Level
Understanding Dynamic Range and Headroom
A General Approach to Setting Levels in a Sound System
How to Select a Headroom Value and Adjust Levels Accordingly
Grounding
What Is a Ground Loop, Why Is It Bad, and How Is It Avoided
Balance Lines and Ground Lift Switches
AC Outlet Wiring Affects Grounding and Safety
How to Obtain a Safety Ground When Using a 2-Wire Outlet
Improperly Wired AC Outlets: Lifted Grounds
Improperly Wired AC Outlets: Lifted Neutral
AC Safety Tips
Speaker Wiring
Use the Appropriate Wire
Calculating Speaker System Load Impedance
Impedances of Series/Parallel Speaker Wiring
Distributed Speaker Systems and Constant Voltage Lines
Information about the Transformers Used on the Speakers
How to Calculate Amplifier Power Output in Bridged Mono Mode
Multi-Amplifier Speaker Systems (Biamping, Triamping and so Forth)
How Crossover Networks Operate and What They Do
The Difference between Low and High Level Crossovers
The Pros and Cons of Low Level and High Level Crossovers
Three Types of 3-Way Speaker Systems
The Meaning of Various Amplifier Power Rating Methods
Peak Power
Continuous Average Sine Wave Power (RMS Power)
IHF Power and Dynamic Headroom (Music Power)
Protection for Speakers
Output Relay
Current Limiting
Speaker Fuses
Compressor/Limiter
Equalizers and Filters
High Frequency Driver Protection Networks (Filters)
Specifications
Block Diagram
Performance Graphs
Dimensions
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Quick Links
1
Product Overview
2
Rear Panel Facilities
3
Specifications
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See also:
Service Manual
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Table of Contents
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This manual is also suitable for:
P1150
P2250
P2150
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