Conrad-Johnson CA200 Manual de usuario

Conrad-Johnson Owner’s Manual:

CA200 Control Amplifier

conrad-johnson It just sounds right.

CA200 Owner’s Manual 1

Thank you for selecting the conrad-johnson CA200 control ampli-

fier as the control center and power amplifier for your audio sys-

tem. The CA200 is a reference quality amplifier circuit derived from

our highly regarded Premier 350 power amplifier, combined with

the control functions of our Premier 18 line-stage preamplifier. The

CA200 is capable of remarkably faithful recreation of the dynamics,

textures, tonalities, and ambience of live musical performances.

We believe that you will experience the excitement of discovery in

hearing more from your favorite recordings than ever before.

At conrad-johnson, we expect our products to be a source of satis-

faction and of pride to their owners for many years to come. Ac-

cordingly, circuit designs, parts and materials for all conrad-

johnson products are selected with a view to maintaining optimal

performance over the years. Our reputation for producing among

the industry’s most reliable components is a natural consequence

of this engineering approach.

Although the CA200 has been designed to operate in an intuitively

apparent way, you will find useful information on its installation and

operation in this manual. Please take a few minutes to read the

manual to better understand the features and capabilities of your

CA200. Note that this unit is phase inverting. See the section enti-

tled “Getting The Most From Your CA200" for details on correct

hookup in your system.

In closing, we’d like to welcome you to the family of conrad-

johnson owners. We want you to enjoy your conrad-johnson prod-

uct to the fullest. To this end, our staff stands ready to answer any

questions you may have about the function and application of your

CA200, and to provide any needed service both during, and after

the warranty period. Our goal is to heighten your enjoyment of re-

corded music.

CA200 Owner’s Manual 2

imited Warranty For Conrad-Johnson Components

Conrad-Johnson Design, Inc. will provide service under warranty to

the original owner on products sold new in the United States for the

lesser period of three years from the date of purchase by the origi-

nal purchaser, or five years from the date of shipment to the au-

thorized conrad-johnson dealer. During the warranty period, con-

rad-johnson will repair defective units without charge for labor or

parts (with the exception of vacuum tubes and batteries).

Exclusions. The following are not covered under this warranty:

a) Units which have been damaged by misuse, abuse, or acci-

dent.

b) Units which have been modified, altered, or improperly re-

paired by anyone not specifically authorized by conrad-johnson

design, inc.

c) Units not purchased from an authorized conrad-johnson

dealer in the United States for use in the United States.

d) Normal wear

e) Incidental or consequential damages are not covered under

this warranty. Some states do not allow the exclusion of inci-

dental or consequential damages, so this exclusion may not

apply to you.

Obtaining Warranty Service: To obtain warranty service, the unit

must be shipped, along with evidence of purchase, in factory pack-

ing to conrad-johnson design (or designated service center) with

freight and insurance prepaid by the owner. After repair, the unit

will be returned with freight and insurance prepaid by conrad-

johnson design to any destination in the United States.

All implied warranties, including merchantability and fitness for a

particular purpose are limited in duration to the duration of this ex-

press warranty. Some states do not allow limitations on the dura-

tion of implied warranties so the above limitations may not apply to

you.

This warranty gives you specific legal rights and you may also

have other rights which vary from state to state.

CA200 Owner’s Manual 3

Conrad-Johnson products purchased outside the United States are

covered by warranty terms of the importing distributor in the coun-

try in which the product was originally purchased, which may differ

from the terms set out herein. Importing distributors are not obli-

gated to provide warranty service for products originally purchased

outside their country. Conrad-Johnson will provide warranty service

for products outside the United States, but in these cases, the cus-

tomer must pay all shipping, handling and customs costs both to

and from our Service Department.

Questions about this warranty should be addressed to:

Service Department

conrad-johnson design, inc.

2733 Merrilee Drive

Fairfax, VA 22031

The conrad-johnson service department can also be reached by e-

mail at [email protected], by phone at 703-698-8581,

or by fax at 703-560-5360.

Service

If your conrad-johnson audio component requires service, repack it

using the original box and packing material and ship to the Service

Department address above. Boxes and packing materials can be

purchased through our service department if you no longer have

yours. Include with the unit a note describing the problem you are

having in as much detail as possible. It is especially important for

our technician to know if the problem is intermittent. If you want an

estimate of cost for out of warranty service, be sure to request it in

this note. Be aware that requesting an estimate will delay service

to your unit, as we will have to contact you for approval before

commencing service.

Registering The Warranty

Please return the enclosed card to the factory within 30 days of

purchase to register the warranty

CA200 Owner’s Manual 4

nstallation

Set Up

To maintain proper ventilation, mount the CA200 horizontally on a

flat, hard surface, and take care that the ventilation holes in the

bottom and top are unobstructed. Allow at least three inches of

clearance above the unit and keep the cabinet or shelf open at the

back.

All CA200s sold in the United States are configured for operation

on a 60Hz ac power line producing between 108 and 126 volts.

Export versions of the CA200 will have the correct operating volt-

age and frequency clearly marked on the back panel of the unit,

near the ac power cord. In all cases, the actual line voltage should

be within + 5/-10% of the nominal rated voltage.

Electromagnetic Interference (EMI)

Considerable care has been taken in the design of the CA200 to

minimize its susceptibility to radio frequency interference and other

forms of EMI. Choice of materials, physical layout, grounding prac-

tice, and power supply design have all been specified with a view

to reducing the impact of electromagnetic fields on the perform-

ance of this unit. At the same time, however, our primary goal is

the accurate reproduction of recorded music in the normal home

environment, and we have elected not to compromise this objec-

tive by the application of heavy-handed RFI filters, or by using

grounding practices that reduce RFI at the expense of degraded

audio performance. We find that the approach we have taken has

worked extremely well, resulting in only rare instances of EMI prob-

lems which could be treated locally as needed, rather than com-

promising the performance of our product in the 99.9% of installa-

tions where EMI is not a problem.

Care in installation can often avoid EMI induced problems. The fol-

lowing practices should generally be observed in any application,

and will be especially important where EMI may be a problem.

Interconnect cables should be kept as short as possible (3 meters

or less), and shielded cable should be used (cable which has two

center conductors, and a separate external shield connected at

only one end).

CA200 Owner’s Manual 5

Physical location and cable “dress” can be an important factor in

minimizing hum pickup. The installation should situate the CA200

well away from sources (CD player, tuner, etc.) and power (ac

mains) cords should be dressed to remain at least 4" (100mm)

away from input/output cables.

CA200 Owner’s Manual 6

onnection

SOURCES (PH/AUX1, TUNER, CD, VIDEO, AUX2): These high

level inputs are electrically equivalent. The load they present to the

source varies with the volume control setting, but in no case will it

drop below 12 kOhms. Connect the corresponding source compo-

nents to these inputs.

EPL1: This set of line-level inputs and outputs provides for connec-

tion of an external signal processor (e.g. parametric equalizer, tone

controls) or a tape recorder. Connect the EPL OUT to the input of

your signal processor or tape recorder, and the EPL IN to the out-

put of your processor or tape recorder. Alternatively, the EPL IN

connection can be used as an additional line level input.

EPL2/THEATER: This is an external processor loop designed to

conveniently accommodate the addition of a surround-sound proc-

essor (SSP) to a high-quality two-channel system without compro-

mising two-channel performance. Connect the front left and front

right channel outputs from your SSP to THEATER IN. You can also

connect the THEATER OUT to an input on your SSP, allowing you

to do signal processing on selected two channel sources. When

THEATER is selected, the level controls are set and locked to unity

gain. Level and balance control are then accomplished via your

surround sound processor.

PRE OUT: Provided for special applications, such as bi-amplified

audio systems. We recommend the use of an amplifier with an in-

put impedance of 20k ohms or higher. The Pre Out is phase cor-

rect. See the section on “Getting the most out of your CA200" for

an explanation.

SPEAKER OUTPUTS: Binding posts are provided for the connec-

tion of your loudspeakers, with correct spacing to accept a stan-

dard “double banana” plug (not provided for on European units).

They will also accept spade lugs, or bare wire. The two channels

should be connected in correct “relative phase”. This means that

when the same signal is applied to both channels, the right and left

channel speaker diaphragms will move synchronously –in and out

together.

The connectors on speakers are usually coded –one designated

“C”, “ground”, “-“, or black, the other designated “+” or red. In-

phase connection can normally be achieved by taking care to con-

nect the wire from the “+” amplifier terminal to the red or “+”

CA200 Owner’s Manual 7

speaker terminal, and connecting the wire from the “-“ amplifier

terminal to the black or “-“ coded terminal on both speakers. (See

the section on correct absolute phase, for discussion of when you

may want to reverse the connection on both speakers –that is “+”

to black, “-“ to red on both speakers).

In-phase connection of the speakers can be readily ascertained by

ear. Listen to a recording of a solo vocalist (use a monaural re-

cording if available). With the speakers in phase, the voice should

be clearly focused between the two speakers. With the speakers

connected out of phase, the voice will be diffuse, with no identifi-

able source. Relative phase may be reversed by switching the “+”

and “-“ connections at one speaker only.

CA200 Owner’s Manual 8

ontrols

<mute>: The mute button performs two functions –to mute the

output when listening, and also to switch the CA200 on and off. To

turn the CA200 on or off, press and hold the mute button for two

seconds.

When on, pressing the mute button will silence the preamplifier

main outputs, and set the level display to zero on both channels.

Pressing the mute button again will restore the previously selected

level setting.

When first connected to ac mains, or after an interruption of power,

the CA200 will turn on in a default mode (after auto-muting), with

the level set at 20, and the CD input selected. In subsequent ses-

sions, as long as the ac mains has not suffered a power outage,

the unit will turn on at the last used volume setting and input.

<vol up>, <vol dn>: Level setting on the CA200 is achieved by us-

ing a programmed microprocessor to select combinations from

among an array of high-quality precision resistors. This arrange-

ment allows 100 steps of approximately .7 dB per step. The steps

are numbered 0 through 99, with 0 being silence, and 99 being

maximum volume.

The level setting can be changed by pressing the vol up and vol dn

buttons on the front panel. Each time a button is pressed, the level

will move up or down one step. If a button is pressed and held, the

level control will cycle through the steps at an accelerating rate.

Balance can only be set using the remote control.

<source>: Pressing the button labeled source will cause the unit

to step through the five source inputs (ph/aux, tuner, cd, video,

aux2). The selected input will be indicated by an illuminated led.

<epl/thtr>: Pressing the epl/thtr button will cause the unit to step

from source through epl1 and theater. When source is selected,

the input selected by the source selector will be passed directly to

the volume control. When the EPL1 or THEATER inputs are se-

lected, the selected source will first pass through the external

processor loop before being routed to the volume control. When

THEATER is selected, the level will be set and locked to unity gain.

CA200 Owner’s Manual 9

Remote Control

All operations of the CA200 can be controlled by the wireless re-

mote unit.

MUTE: Pressing the mute button will cause the main outputs to

mute and the level display to be zero. Pressing it again will restore

the last level setting. Pressing and holding the mute button for

more than three seconds will switch the CA200 on and off.

SELECTORS (PH/AUX, TUNER, CD, VIDEO, AUX2): You can di-

rectly access any of these inputs by pressing the associated button

on the remote.

EPLS (EPL1, EPL2): Pressing the EPL buttons inserts the associ-

ated processor in the signal path. Pressing the button again will re-

establish a direct connection to the selected source. Pressing the

EPL2 button selects the THEATER input, setting and locking the

level to unity gain.

LEVEL (+, -): Duplicates the function of the front panel <vol up>,

<vol dn> controls.

BALANCE: Allows attenuation of either channel independently of

the other. Pressing the right balance button will reduce the left

channel level setting by one step. Pressing and holding the right

balance button will cause the left channel to cycle down through its

level settings at an accelerating rate. Pressing the left balance but-

ton will attenuate the right channel in the same manner.

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