background image

5

Introduction

Performance Features

Introduction and Performance Features 

The McIntosh C2300 Tube Preamplifier is one of the 

finest Tube Preamplifiers ever created. The versatile 

Preamplifier provides connections for various input 

sources and outputs to drive multiple Power Ampli-

fiers. The C2300 reproduction is sonically transparent 

and absolutely accurate. The McIntosh Sound is “The 

Sound of the Music Itself.”

• Electromagentic Input Switching with Level Trim 

Adjustment

Digital Logic integrated circuits drive Electromag-

netic Switches on all Inputs and operating functions 

for reliable, noiseless, distortion free switching. All 

eight Inputs on the C2300 can be matched in level, so 

there are no abrupt changes in volume levels between 

the different Inputs. There is also a Record Monitor 

function for checking the progress of a recording.

• Moving Coil and Moving Magnet Phono Inputs

The C2300 contains two different precision Phono 

Preamplifier Circuits. One for low output Moving Coil 

Phono Cartridges with selectable resistance loading, 

the other is for Moving Magnet Cartridges with select-

able capacitive loading. Both circuits use the latest 

designs to provide the lowest possible noise and dis-

tortion. The RIAA Correction Equalization Circuitry 

utilizies close tolerance resistors and capacitors for an 

extremely flat frequency response.

• Balanced Inputs

 

The Balanced Inputs allow the connection of a source 

component using long cable lengths without a loss in 

sound quality.

• Precision Tracking Volume Control

Volume levels are controlled by a new Multi-Stage 

Precision Digitally Controlled Attenuator System with 

a tracking accuracy of 0.1dB.

• Variable Rate Volume and Balance Control Selec

-

tion

The C2300 Tube Preamplifier’s Volume and Balance 

Control Circuitry provides an ideal rate of change with 

control rotation.

• Assignable Tone Controls with Bypass

The C2300 remembers the Bass and Treble Control 

Settings or the Tone Circuitry Bypass Option for each 

input.

• Alphanumeric Fluorescent Display

The Multifunction Front Panel Display indicates the 

Source Selection, Volume and Balance Levels. Setup 

Mode Selections and Adjustments are also displayed. 

The display intensity is adjustable.

• Precision Parts

Only the finest precision 1% tolerance resistors are 

used throughout.

• Low Distortion

Distortion levels of all types are less than 0.08%. Mu-

sic is amplified with total transparency and accuracy.

• Passthru Mode

The Automatic Passthru Mode allows the C2300 to 

become part of a Multichannel Sound System for 

DVD-Audio, SACD and Home Theater Movies.

• Output Switching

Front panel Output Push-buttons control two Switched 

Outputs that allow sending signals to two separate 

Power Amplifiers.

• Remote Control with External Sensor Input

The Remote Control provides control of the C2300 

operating functions and any McIntosh Source Com-

ponents connected to it. Enjoy your McIntosh System 

from other rooms in your home by connecting exter-

nal sensors.

• Power Control Output and Trigger Assignment

A Power Control connection for convenient Turn-On 

of McIntosh Power Amplifiers, Source Components 

and Accessories is included. Two of the Power Con-

trol Ouputs may be assigned to activate when a given 

Input is selected.

• Special Power Supply

Fully regulated Power Supplies and a special R-Core 

Power Transformer ensure stable noise free operation 

even though the power line varies.

• Extruded Side Panels

The sides of the C2300 are extruded aluminum panels 

with a bead blast textured surface and a black anod-

ized finish.

• Fiber Optic Solid State Front Panel Illumination

The even Illumination of the Front Panel is accom-

plished by the combination of custom designed Fiber 

Optic Light Diffusers and extra long life Light Emit-

ting Diodes (LEDs). The glass Front Panel ensures the 

pristine beauty of the C2300 will be retained for many 

years.

Summary of Contents for C2300

Page 1: ...McIntosh Laboratory Inc 2 Chambers Street Binghamton New York 13903 2699 Phone 607 723 3512 www mcintoshlabs com C2300 Tube Preamplifier Owner s Manual ...

Page 2: ...ed 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 they exit from the apparatus 11 Only use attachments accessories specified by the manufacturer 12 Use only with the cart stand tripod bracket or...

Page 3: ...ocedure contact the McIntosh Service Department at McIntosh Laboratory Inc 2 Chambers Street Binghamton New York 13903 Phone 607 723 3515 Fax 607 723 1917 The serial number purchase date and McIntosh Dealer name are important to you for possible insurance claim or future service The spaces below have been provided for you to record that information Serial Number ________________________________ Pu...

Page 4: ... or incinerated but disposed of in accordance with the local regulations concerning battery disposal Power Control Trigger Pass Thru and Data Cable Part No 170 202 Six foot shielded 2 conductor with 1 8 inch stereo mini phone plugs on each end Data Port Connectors The C50 Data Out Ports send Remote Control Signals to Source Components A 1 8 inch stereo mini phone plug is used for connection Genera...

Page 5: ...ntrol rotation Assignable Tone Controls with Bypass The C2300 remembers the Bass and Treble Control Settings or the Tone Circuitry Bypass Option for each input Alphanumeric Fluorescent Display The Multifunction Front Panel Display indicates the Source Selection Volume and Balance Levels Setup Mode Selections and Adjustments are also displayed The display intensity is adjustable Precision Parts Onl...

Page 6: ...tion on the next page pertaining to installing the C2300 into cabinets Front View of the C2300 Rear View of the C2300 Side View of the C2300 17 1 2 44 45cm 7 5 8 19 37cm 7 1 8 18 10cm 6 3 8 16 19cm 13 1 4 33 66cm 17 1 8 43 50cm 16 1 2 41 91cm 3 16 0 48cm 13 16 2 06cm 6 9 16 16 67cm 10 9 16 26 83cm 14 1 2 36 83cm 2 5 08cm 1 15 16 4 92cm ...

Page 7: ...aining all the system components at the coolest possible operating temperature A custom cabinet installation should provide the following minimum spacing dimensions for cool operation Allow at least 6 inches 15 24cm above the top 2 inches 5 08cm below the bottom and 1 inch 2 54cm on each side of the Tube Preamplifier so that airflow is not obstructed Allow 19 1 2 inches 49 53cm depth behind the fr...

Page 8: ...Rear Panel Connections for the C2300 Audio Preamplifier is located on a separate folded sheet contained in the Owner s Manual Packet Refer to separate sheet Mc2A for the Rear Panel Connections Rear Panel Connections C2300 Tube Preamplifer Rear Panel ...

Page 9: ...ntrol Cable from the C2300 CD DATA PORT Jack to the McIntosh SACD CD Player Data In jack 10 Connect a Control Cable from the C2300 SRVR DATA PORT Jack to the McIntosh Music Server Data In jack 11 Connect a Control Cable from the C2300 D A DATA PORT Jack to the McIntosh D A Converter Data In jack 12 Connect any additional McIntosh Components in a similar manner as outlined in steps 8 thru 11 Sensor...

Page 10: ...n with indicator allows the changing of the default settings for Inputs Levels Special Functions and the Display REC MONITOR Push but ton with indicator allows listening to the playback of REC SRVR Source while the recording is in process DISPLAY indicates the Sources Volume other Audio Settings Operational Func tions and Setup Mode Settings OUTPUTS 1 and 2 Push buttons with indicators allow the C...

Page 11: ...Number for additional information Default Settings Function Name Setting Page No C2300 V_ _ _ 11 TRIM TUNer 0 0 11 INPUT 3 â TUN 12 METER ON 12 DISPLAY 7 12 TRIGger TUNER 12 ACCessory C MAIN 13 TUBE LED ON 13 PASSTHRU OFF 13 The C2300 functionality is controlled by internal software that is know as Firmware The Version of the Firmware in the C2300 can be identified at any time by utilizing the Set...

Page 12: ...f a turntable only and thus the title is not changeable However the Phono Input may be switched Off 1 Press the SETUP Push button to access the Setup Mode 2 Rotate the MENU Control until INPUT 3 âTUN appears on the Front Panel Alphanumeric Display 3 Rotate the SELECT 1 Control until INPUT 7 âCDR appears on the Front Panel Alphanumeric Display Refer to figure 6 4 Rotate the SELECT 2 Control until t...

Page 13: ... Control until the display indicates TRIG DVD A Refer to figure 9 5 Press the SETUP Push button to exit the Setup Mode Setup con t Figure 9 Figure 8 Accessory Power Control The ACC C Power Control Output is reassignable from the default setting of going ON OFF with the C2300 Main to being controlled by the Remote Control ACC ON OFF Push buttons To reassign it perform the following 1 Press the SETU...

Page 14: ...s the audio Adjusts the volume level up or down Selects On Screen Functions on a variety of McIntosh Components Selects AM Tuner Operating Functions and Disc Selection on certain McIntosh Disc Players Selects FM Tuner Operating Functions and Track Selection on certain McIntosh CD Players Press to review Tuner Station Presets with an external McIntosh Tuner connected and select certain functions on...

Page 15: ...r Push buttons Press the AM or FM Push button to select the de sired broadcast band Press and release the Seek7 or Seek8 Push button to seek the next available station Press and hold a Seek7 or Seek8 Push button to seek continuously from station to station Volume Press the VOLume or Push button to raise or lower the listening volume level Note The Record Signals present at REC OUTPUTS are not affe...

Page 16: ...e the Balance Trim Function as needed to achieve approximately equal listening vol How to Operate the C2300 ume levels in each Loudspeaker To adjust the Balance perform the following 1 Rotate the Front Panel TRIM SELECT Control or press the TRIM Push button on the Remote Con trol until BALANCE 00 appears on the Front Panel Alphanumeric Display 2 Rotate the TRIM ADJUST Control or press the LEVEL Pu...

Page 17: ...ontrol or press the LEVEL Push buttons to activate the Tone Bypass or deactivate the Tone Bypass Refer to figure 19 After approximately 3 seconds the Alphanumeric Display returns to indicate the Source Selection and Volume Level TRIM LEVEL The Trim Level adjustments allows for making fine adjustments to the previously performed Trim Level Adjustments in the Setup Section of this Owner s Manual on ...

Page 18: ...MC or Phono MM Input is selected an additional TRIM SELECT FUNCTION becomes available for adjustment Perform the following steps to make the Phono Trim Adjustments 1 Select either the Phono MM or Phono MC Input using the INPUT Control 2 Rotate the TRIM SELECT Control or press the TRIM Push button on the Remote Control until PHMM _ _ _ PF or PHMC _ _ _ OHM appears on the Front Panel Alphanumeric Di...

Page 19: ...the Front Panel or Remote Control will un mute the C2300 If the Front Panel MUTE Push button is pressed for at least 3 seconds the C2300 will mute the OUT PUTS connectors yet listening with headphones will continue until the Mute Push button is pressed again for 3 seconds The Front Panel Alphanumeric Display will indicate the Input Source Name Volume Setting and a Dot Refer to figures 25 and 26 Ou...

Page 20: ...a step up transformer It offers the ability to change the input impedance from 25 ohms to 1000 ohms in six steps to match a wide variety of Moving Coil Cartridges The C2300 utilizes a double filtered power supply design just for the Moving Coil Preamplifier The second compensation amplifier stage uses 12AX7A tubes Its input stage has been optimized for low noise and low distortion performance With...

Page 21: ...ngs of the volume control By placing the Volume Control after the Amplifying Circuitry there is lower background noise however a reduction in dynamic range and input overload is the result The only cor rect way to design a high performance Preamplifier is with two volume controls This provides the benefits of wide dynamic range freedom from Input overload and a background noise level that actually...

Page 22: ...MC 5mV Voltage Gain High Level to SRVR REC Output 0dB High Level to Main Output 15dB Phono MM to Record Output 40dB Phono MC to Record Output 60dB Output Impedance 220 ohms Headphone Load Impedance 16 ohms to 250 ohms Tube Compliment MM Phono Circuitry 2 12AX7A MC Phono Circuitry 2 12AX7A High Level Circuitry 2 12AX7A Power Requirements 100 Volts 50 60Hz at 75 watts 110 Volts 50 60Hz at 75 watts 1...

Page 23: ...in shipping damage Use the original shipping carton and interior parts only if they are all in good serviceable condition If a shipping carton or any of the interior part s are needed please call or write Customer Service Depart ment of McIntosh Laboratory Refer to page 3 Please see the Part List for the correct part numbers Quantity Part Number Description 1 033888 Shipping carton only 4 033887 E...

Page 24: ...ucts is the policy of McIntosh Laboratory Incorporated who reserve the right to improve design without notice Printed in the U S A McIntosh Laboratory Inc 2 Chambers Street Binghamton NY 13903 www mcintoshlabs com McIntosh Part No 04130100 ...

Reviews: