Table of Contents
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T
E
C
H
N
O
L
O
G
I
S150
BIAS
POWER
BIAS
SYSTEM CURRENT AMPLIFIER
SAFETY PRECAUTIONS
INTRODUCTION
INSTALLATION CONNECTIONS
DETAILED INSTALLATION
DESIGN PHILOSOPHY
TECHNICAL DATA
CARE & HANDLING
SERVICING
WARRANTY
WARRANTY REGISTRATION
ADDRESS
E
S
I
N
C
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INPUT
BIAS
UNBAL./YELLOW
BALANCE/GREEN
SYSTEM VOLTAGE AMPLIFIER
AMPLIFIER SYSTEM
OPERATION MANUAL
S250
BIAS
POWER
BIAS
SYSTEM CURRENT AMPLIFIER
1
2
3
4
8
11
12
13
22
23
24
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Table of Contents
Related Manuals for Coda S150
Summary of Contents for Coda S150
- Page 1 AMPLIFIER SYSTEM OPERATION MANUAL INPUT BIAS UNBAL./YELLOW BALANCE/GREEN SYSTEM VOLTAGE AMPLIFIER S150 S250 BIAS POWER BIAS BIAS POWER BIAS SYSTEM CURRENT AMPLIFIER SYSTEM CURRENT AMPLIFIER SAFETY PRECAUTIONS INTRODUCTION INSTALLATION CONNECTIONS DETAILED INSTALLATION DESIGN PHILOSOPHY TECHNICAL DATA CARE & HANDLING SERVICING...
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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 DANGEROUS VOLTAGE WITHIN THE UNIT'S ENCLOSURE THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A RISK OF ELECTRIC... - Page 3 INTRODUCTION This amplifier is a precision device, designed in an effort to provide the listener with unmatched sound quality, design, and construction. In order to operate your amplifier properly and to realize all of the capabilities of the AMPLIFIER SYSTEMS, were commend that you read this entire manual carefully.
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Page 4: Installation Connections
Make sure during installation that the main AC power switch on the back of the CURRENT AMPLIFIER S150/250 is turned off, and AC power connection to the VOLTAGE AMPLIFIER SV is interrupted. While the diagram may be self explanatory, we strongly recommend that you read the detailed instructions following this introductory section. -
Page 5: Detailed Installation
VOLTAGE AMPLIFIER SV, and on the back panel of the CURRENT AMPLIFIER S150/250. It is important to remember the correct left or right channel orientation. The function and channel markings on the rear panel correspond to the front panel control and their signal paths. - Page 6 CURRENT AMPLIFIER S150/250 1. The OPERATION SELECTOR sets the operational mode between PARALLELED, or SPLIT CHANNEL. The default position is SPLIT for the S150 and PARALLELED, for the S250, for the alternate positions, see the SERVICING section of this manual.
- Page 7 YELLOW indicates the unbalanced input has been selected. The BIAS control [2] enables the on the bias current and opens shunting relays that mute the input for the CURRENT AMPLIFIER S150/250. This BIAS ON state is indicated by the BLUE LED [3].
- Page 8 The BIAS LEDs [1], when lit, indicate that the bias is activated, and shunting relays that mute the input from the VOLTAGE AMPLIFIER SV are open. The POWER LED [2], when lit, indicates that the CURRENT AMPLIFIER S150/250 is in an operational state.
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Page 9: Design Philosophy
This is achieved by the implementation of several distinct circuit features. In the Current Amplifier S150/250 a large number of extremely wide bandwidth output transistors are used instead of the usual cost effective MOSFET devices which are used in other transistor designs. - Page 10 Current Amplifier S150/250. The main power supply of the Current Amplifier S150/250 consists of 3.0 kVA toroidal power transformer with independent rectifiers to isolate the channels from one another. Two hundred thousand microfarads of total capacitance provide effective filtering.
- Page 11 XLR input and output connectors are Neutriks from Switzerland. These are finished in black chrome with gold contacts. Speaker connectors are also gold plated. 7. Wire - All signal wire has been eliminated whenever possible. Where wire is used, Coda employs silver plated copper, 141 strand, 18 gauge wire with a silicone insulation.
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Page 12: Technical Data
TECHNICAL DATA AMPLIFIER SYSTEM S150/250 PARALLELED (S250) Rated Power: 250 Watts @ 8 Ohms (200 Watts Class A) driven from 20Hz to 20kHz Frequency Response: DC to -3dB @ 100kHz Distortion: < .1 percent from 10Hz to 20kHz @ 100 Watts driven into .5 Ohms... -
Page 13: Care And Handling
If a cleaner is necessary, any dilute commercial ammonia based product will be appropriate. NEVER use any abrasive rags, cleaners or chemical solvents on Coda products. When handling the unit, take care not to mar the aluminum. Aluminum is a medium hardness metal and can be scratched by the harder tool steels. - Page 14 SERVICING VOLTAGE AMPLIFIER SV WARNING: NEVER OPERATE THIS UNIT WITH THE TOP COVER REMOVED. NEVER MAKE ANY INTERNAL ADJUSTMENTS WHILE THIS UNIT IS CONNECTED TO AN AC POWER SOURCE. 1. To change the SV from it's default settings, unplug the AC line source and remove the top cover using a 1/16 inch hex driver.
- Page 15 The OPERATION SELECTOR is now commoning both channels of the inputs and both channels of the outputs of the S150/250. The cable from the SV may plug into either LEFT/ CH A or RIGHT/CH B input and the speaker leads may be attached to either LEFT/CH A OUTPUT or RIGHT/CH B OUTPUT.
- Page 16 SERVICING AC LINE INPUT FOR CONTIMUED PROTECTION AGAINST SEE SERIAL T AG FOR SHOCK OR FIRE HAZARD, DO NOT EXPOSE OUTPUT TO CODA CURRENT AMPS ONL Y BALANCED INPUT UNBALANCED INPUT POWER REQUIREMENTS THIS UNIT TO RAIN OR MOISTURE. LEFT...
- Page 17 POWER SOURCE. SPLIT CHANNEL operation consists of one front end and two separate output stages per channel. To operate, set the SV internal bridging switches for STEREO and each S150/250 OPERATION SELECTOR switch, located on the back panel for SPLIT CHANNEL.
- Page 18 DETAILED INSTALLATION section of this manual. AC LINE INPUT FOR CONTIMUED PROTECTION AGAINST SEE SERIAL T AG FOR SHOCK OR FIRE HAZARD, DO NOT EXPOSE OUTPUT TO CODA CURRENT AMPS ONL Y BALANCED INPUT UNBALANCED INPUT POWER REQUIREMENTS THIS UNIT TO RAIN OR MOISTURE. LEFT...
- Page 19 3 of the right XLR, and pin 2 of the right XLR commons with pin 3 of the left XLR. Whichever input is used on the SV, the output of the S150/250 that is attached to that channel will be the positive signal and the channel which has no input, that S150/250 will be the negative signal.
- Page 20 AC LINE INPUT FOR CONTIMUED PROTECTION AGAINST SEE SERIAL T AG FOR SHOCK OR FIRE HAZARD, DO NOT EXPOSE OUTPUT TO CODA CURRENT AMPS ONL Y BALANCED INPUT UNBALANCED INPUT SEE SERIAL T AG FOR SHOCK OR FIRE HAZARD, DO NOT EXPOSE...
- Page 21 3 of the right XLR, and pin 2 of the right XLR commons with pin 3 of the left XLR. Whichever input is used on the SV, the output of the S150/250 that is attached to that channel will be the positive signal and the channel which has no input, that S150/250 will be the negative signal.
- Page 22 AC LINE INPUT FOR CONTIMUED PROTECTION AGAINST SEE SERIAL T AG FOR SHOCK OR FIRE HAZARD, DO NOT EXPOSE OUTPUT TO CODA CURRENT AMPS ONL Y BALANCED INPUT UNBALANCED INPUT SEE SERIAL T AG FOR SHOCK OR FIRE HAZARD, DO NOT EXPOSE...
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Page 23: Warranty
Coda Technologies, Inc. without charge for parts, or labor for a period of ten years from date of original purchase. Coda Technologies, Inc. will provide for surface transportation to and from the factory from an authorized Coda Technologies, Inc. -
Page 24: Warranty Registration
WARRANTY REGISTRATION Fill in and retain this copy of the warranty registration sheet for your records. MODEL DESIGNATION: SERIAL NUMBER: DATE OF PURCHASE: PLACE OF PURCHASE Name: Address: City: State: Zip: Phone: OWNER INFORMATION Name: Address: City: State: Zip: Phone: NOTES:... - Page 25 WARRANTY REGISTRATION 23.5 Please fill in and send this copy of the warranty registration sheet to Coda Technologies Inc. Include copy of proof of purchase. MODEL DESIGNATION: SERIAL NUMBER: DATE OF PURCHASE: PLACE OF PURCHASE Name: Address: City: State: Zip:...
- Page 26 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...