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23

Note: The audio signal present at the FIXED OUT 

Jacks is unaffected by the Equalizer settings.

1. Select the desired Input Source.

2. Select “EQUALIZER, Off” as indicated on 

the Front Panel Information Display. Refer to           

figure 57.

3. Set the EQUALIZER On for the desired Input by 

using the Front Panel Volume Control or the Re-

mote Control Push-buttons. Refer to figure 58.

Refer to graph on page 26 for additional information 

on using the MA352 Equalizer. After approximately 

5 seconds the Information Display returns to indicate 

the Source Selection and Volume Level.

MONO/STEREO MODE

Press the TRIM push-button or the INPUT Front Pan-

el Control to select MODE function as it is indicated 

on the Front Panel Information Display. By default the 

Stereo Mode is active for all Input Sources however, 

any Input Source may be assigned to the Mono Mode 

of operation. To change Stereo Mode to Mono for a 

given Input Source, perform the same type of steps by 

using the Front Panel Controls or the Remote Control 

Pushbuttons as done for Treble and/or Bass Settings:

Note: The audio signal present at the FIXED OUT 

Jacks is affected by the Stereo/Mono setting.

1. Select the desired Input Source.

2. Select “MONO / STEREO,            ______” as 

indicated on the Front Panel Information Display. 

Note: The Front Panel INPUT Control may also be 

used.

2. Press the LEVEL UP / DOWN Push-buttons on 

the Remote Control to emphasize the Right Chan-

nel (refer to figure 55) or the Left Channel (refer to 

figure 56).

The Front Panel Display indicates the Balance changes 

are from 0 to 50 dB. After approximately 4 seconds 

the Information Display returns to indicate the Source 

Selection and Volume Level. To verify the Balance 

setting without changing it, use the TRIM Push-button 

and select Balance.

EQUALIZER MODE

Press the TRIM push-button or the INPUT Front 

Panel Control to select EQUALIZER function as it is 

indicated on the Front Panel Information Display. The 

built-in four band Frequency Equalizer provides more 

precise adjustment of sound than standard Bass and 

Treble Controls. By default, the Equalizer is Off for all 

Input Sources and the Equalizer Circuitry is bypassed. 

Any Input Source may be assigned to have the Equal-

izer On when selected. To activate the Equalizer for 

a given Input Source, select the desired Input Source, 

perform the following steps:

Figure 54

 L    BALANCE     R

||

How to Operate the MA352

Figure 56

¦¦¦¦¦¦¦¦¦

 L    BALANCE    R

Figure 55

¦¦¦¦¦¦¦¦

L    BALANCE    R

¦

Refer to figure 59.

3. To select MONO Mode adjust the TRIM LEVEL. 

Refer to figure 60.

After approximately 6 seconds the Information 

Display returns to indicate the Source Selection and 

Volume Level.

OUTPUT 1 AND 2

Press the TRIM push-button or the INPUT Front 

Panel Control to select the OUTPUT 1 or OUTPUT 

2 function as they are indicated on the Front Panel 

Information Display. The Output 1 setting is for loud-

speakers connected to the Power Amplifier Circuitry 

of the MA352. The Output 2 Setting is for an external 

Power Amplifier connected to the MA352 Rear Panel 

Preamplifier Circuitry Output Jacks. Select the appro-

priate Setting for the Output 1 and Output 2 settings, 

either On or Off. Refer to figures 61, 62, 63 and 64 on 

this and the next page.

Figure 57

   EQUALIZER

      Off

 

Figure 58

   EQUALIZER

       On

 

Figure 60

   MONO / STEREO

   ____

 

Figure 59

   MONO / STEREO

          ______

 

Figure 61

    Output 1

       On

Figure 62

    Output 1

      Off

Summary of Contents for MA352

Page 1: ...McIntosh Laboratory Inc 2 Chambers Street Binghamton New York 13903 2699 Phone 607 723 3512 www mcintoshlabs com MA352 Integrated Amplifier Owner s Manual...

Page 2: ...er 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 ________________________________ Purcha...

Page 3: ...3 IMPORTANT INSTRUCTIONS FOR REMOVAL OF FOAM INSERT OVER THE VACUUM TUBES PRIOR TO CONNECTING THE A C POWER SUPPLY CORD START ON THE NEXT PAGE...

Page 4: ...ceable parts including the tubes If repairs are needed they must be performed by an authorized McIntosh Service Agency Follow the steps below to pre pare the MA352 for operation 1 Orient the MA352 so...

Page 5: ...mall Vacuum Tubes before the MA352 Integrated Am plifier is connected to AC Power and activated for use Failure to do so has the potential to cause physical harm to human be ings and animals This coul...

Page 6: ...n including how to disable it refer to page 21 4 When Power Amplifier Protection Circuitry of the MA352 has activated the Vacuum Tubes LEDs are illuminated continuously with the color orange and the s...

Page 7: ...Controlled Electromag netic Switches on all low level inputs and outputs The operating functions are for reliable noiseless distor tion free switching Moving Magnet Phono Inputs The MA352 Moving Magne...

Page 8: ...5 500 2K 10K BAL 1 15 9 7 8 25 1m Front View of the MA352 Top View of the MA352 Right Side View of the MA352 17 1 2 44 5cm 8 7 8 22 5cm 3 7 62cm 5 3 4 14 6cm 12 7 16 31 6cm 1 1 2 3 8cm 13 1 4 33 7CM R...

Page 9: ...ible operating life for any electronic instrument Do not install the MA352 directly above a heat generating device such as a Power Amplifier Allow at least 6 inches 15 3cm above the top 5 8 inch 1 6cm...

Page 10: ...speaker UNBALANCED INPUTS 1 2 and 3 accept high level program source signals RS232 connector for connection to a compatible control system IR INput for signals from a compatible IR Room Sensor DATA PO...

Page 11: ...tput Balanced Connectors 11 Connect the Audio Cables from the AM FM Tuner UNBAL Connectors to the MA352 UNBAL ANCED 1 Connectors 12 Connect the Audio Cables from the SACD CD Player UNBAL Connectors to...

Page 12: ...s or less 4 Ohms 14AWG 12AWG 10AWG 8 Ohms 16AWG 14AWG 12AWG 1 Prepare the Loudspeaker Hookup Cable for attach ment to the MA352 Power Amplifier Bare wire cable ends Carefully remove sufficient insulat...

Page 13: ...UBE WARMUP Refer to figure B When the tube warm up procedure has completed The illumination of the Tubes will now glow a green color this is followed by the last Input Source listened to and the volum...

Page 14: ...ith McIntosh Models displaying instructions on a video screen Press to change broadcast BANDs on a connected Tuner Select certain functions on a variety of McIntosh Models Select the DEVICE to issue a...

Page 15: ...onal information on using the HR085 Remote Control with the McIntosh Model please refer to the How to Operate starting on page 22 3 For additional information on assigning the Data Ports refer to How...

Page 16: ...c HEADPHONES for private listening INPUT Control used to select a source for listening and recording The control is also used to enter the TRIM or SETUP Modes and select the various functions Front Pa...

Page 17: ...vides the ability to switch unused INPUTS Off or back On if they have been previously switched Off The default INPUT Names can be changed to match the name of the component con nected to it or any oth...

Page 18: ...amed to match up with the compo nent connected refer to page 11 step 9 The MA352 Default Input Names UNBAL 1 BAL 1 COAX 1 etc as indicated on the Front Panel Dis play can be customized to a different...

Page 19: ...a Refer to figure 24 Setup con t Data Port The OUTPUT 2 Rear Panel Unbalanced Connectors are adjustable for their mode of operation 1 Press and hold in the INPUT Control to enter the SETUP MODE Refer...

Page 20: ...he VOLUME ADJUST Control to select Disabled Refer to figure 32 4 Exit the SETUP Mode by several presses of the INPUT Control Figure 31 SETUP Front IR Enabled Figure 32 SETUP Front IR Disabled Remote C...

Page 21: ...ADJUST Control to select Disabled Refer to figure 34 4 Press the INPUT Control to exit the Setup Mode Figure 33 SETUP Auto Off Enabled Figure 34 SETUP Auto Off Disabled Factory Reset If it becomes des...

Page 22: ...appears on the Front Panel Display Refer to figure 54 or push the INPUT Push button on the Remote Con trol to select the Phono Input Refer to figures 51 and 52 Volume Control Rotate the Front Panel VO...

Page 23: ...ately 4 seconds the Information Display returns to indicate the Source Selection and Volume Level To verify the Balance setting without changing it use the TRIM Push button and select Balance EQUALIZE...

Page 24: ...formation Display returns to indicate the Source Selection and Volume Level Figure 65 INPUT TRIM 0 0 dB Figure 67 INPUT TRIM 2 5 dB Figure 66 INPUT TRIM 4 0 dB METER ILLUMINATION The Meter Illuminatio...

Page 25: ...an be adjusted from bright to dim by performing the same type of operational steps for adjusting the METER ILLUMINATION 1 Select DISPLAY BRIGHTNESS as indicated on the Front Panel Information Display...

Page 26: ...han 2 THD with up to 16dB overdrive at 1 000Hz Frequency Response 0 0 5dB from 20Hz to 20 000Hz 0 3dB from 10Hz to 100 000Hz Preamplifier Output Impedance 500 ohms Sensitivity for rated output High Le...

Page 27: ...the proper equipment location on the bottom foam pad Failure to do this will result in shipping damage To protect the tubes during shippment the Foam Insert removed from the MA352 needs to be re inse...

Page 28: ...cts 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 mcin...

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