Coda S12.5 Operational Manual
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Coda S12.5 Operational Manual

Precision bias class a amplifier
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T
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C
H
N
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L
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PRECISION BIAS CLASS A AMPLIFIER
SAFETY PRECAUTIONS
INTRODUCTION
INITIAL SETUP
DETAILED INSTALLATION
DESIGN PHILOSOPHY
TECHNICAL DATA
CARE AND HANDLING
WARRANTY & DISCLAIMER
WARRANTY REGISTRATION
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BIAS
12.5
S
Amplifier S12.5

OPERATION MANUAL

XLR/GN
LEFT
RIGHT
RCA/YL
INPUT
1
2
3
4
8
11
12
13
14

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Summary of Contents for Coda S12.5

  • Page 1: Operation Manual

    Amplifier S12.5 OPERATION MANUAL XLR/GN LEFT RIGHT RCA/YL BIAS INPUT 12.5 PRECISION BIAS CLASS A AMPLIFIER SAFETY PRECAUTIONS INTRODUCTION INITIAL SETUP DETAILED INSTALLATION DESIGN PHILOSOPHY TECHNICAL DATA CARE AND HANDLING WARRANTY & DISCLAIMER WARRANTY REGISTRATION...

  • Page 2: Safety Precautions

    SAFETY PRECAUTIONS CAUTION CAUTION WARNING WARNING CAUTION: TO PREVENT ELECTRIC SHOCK, DO NOT REMOVE COVER. NO USER SERVICEABLE PARTS INSIDE, REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. THIS SYMBOL IS TO ALERT YOU OF THE PRESENCE OF UNINSULATED DANGER- OUS VOLTAGE WITHIN THE UNIT'S ENCLOSURE THAT MAY BE OF SUFFI- CIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC SHOCK.

  • Page 3: Introduction

    Although its operation is fairly simple, in order to operate your amplifier properly and to realize all of the capabilites of the S12.5 we recommend that you read this entire manual carefully.

  • Page 4: Initial Setup

    TO ANY ACTIVE CURRENT SOURCE. 6 AMP SLOW BLOW 5 x 20mm 240V SEE SERIAL TAG FOR POWER FUSE VALUE -SEE FUSE CHART REQUIREMENTS, REMOVE POWER VOLTAGE SELECTION- CORD BEFORE CHANGING SEE OPERATION MANUAL FUSE OR LINE VOLTAGE LEFT SPEAKER RIGHT SPEAKER AMPLIFIER S12.5...

  • Page 5: Detailed Installation

    AC input, is set to the appropriate voltage for your country. When changing voltages, ensure that the power cable is disconnected from the amplifier. Note: If the fuse in your amplifier blows, contact a Coda dealer or call Coda directly before attempting to use the amplifier again.
  • Page 6 DETAILED INSTALLATION II. Front Panel Control Functions and Indicators 1. The BIAS button enables the bias, effectively "turning on" the amplifier's components, and opens shunting relays that mute the input. 2. The INPUT SELECTOR button switches between the balanced and unbalanced inputs.
  • Page 7 OFF before adjusting the mode switch or connecting or disconnecting any cables to avoid potential damage to your speakers. The S12.5 normally operates in stereo mode, providing a maximum output power of 50 watts Class A (into an 8-ohm load) per channel. In BRIDGED mode, both channels act as one amplifier providing a maximum output power of 200 watts.
  • Page 8 DETAILED INSTALLATION IV. BRIDGED SETUP DIAGRAM...

  • Page 9: Design Philosophy

    This allows direct coupling without servo circuitry. The unit also uses output followers operating without feedback. The front end of the S12.5 is designed to operate without ever entering Class B operation as is common in many other designs. This combined with excellent high frequency design insures linear operation at high speed, and translates into a sonic reproduction which is extremely transparent in character.
  • Page 10 Advanced tracking techniques results in absolute control of bias currents under all conditions in the S12.5. The main power supply of the amplifier consists of a 1500VA toroidal power transformer with independent rectifiers to isolate the channels from one another.
  • Page 11 DESIGN PHILOSOPHY II. Material Quality The amplifier’s chassis is made from heavy-gauge steel with a half-inch machined aluminum faceplate. All exterior metal parts are anodized or powder coated for durability. Printed circuit boards are fiberglass epoxy with gold plating over a tin/nickel barrier. The gold layer will not corrode, while the barrier layer prevents the gold from migrating to the lower copper layer.

  • Page 12: Technical Data

    TECHNICAL DATA STEREO Rated Power: 125 Watts @ 8 Ohms Frequency Response: DC to -3dB @ 100kHz Distortion: < .03 percent from 10Hz to 20kHz @ 125 Watts Gain: 26dB Maximum Current: >100 Amperes peak per channel Noise: -120dB referenced to rated output input Impedance: 50k Ohms unbalanced/1k Ohms balanced Output Impedance:...

  • Page 13: Care And Handling

    CARE AND HANDLING The interior of the amplifier requires no special care. If exterior cleaning beyond simple dusting is required, any dilute ammonia-based product is recommended. Do not use any abrasive rags, cleaners or chemical solvents on the amplifier. When handling the amplifier, take care not to mar the faceplate. Aluminum is a medium hardness metal and can be scratched by harder tool steels, and the grained surface can be easily marred if the amplifier is set face-down on a hard surface.

  • Page 14: Warranty And Disclaimer

    WARRANTY & DISCLAIMER i. Warranty - Any failure of the Ampli er S12.5, herea er known as the product or original product, to operate or to meet speci cations, applicable at time of manufacture, due to a manufacturing defect or component failure, will be corrected by Coda Technologies without charge for parts or labor, for a period of ten years from date of original purchase.

  • Page 15: Warranty Registration

    WARRANTY REGISTRATION Fill in this registration sheet and fax or mail it to Coda Technologies to ensure you are in our warranty system. This will facilitate warranty service should it become necessary. It is recommended that you retain a copy of this form for your own records.
  • Page 16 7850 CUCAMONGA AVENUE #34 SACRAMENTO, CA 95826 USA +01 916.383.3653 +01 916.455.3653 phone CODA.CC on the web at info@coda.cc email us at...

This manual is also suitable for:

S5.5

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