McIntosh How to Operate the MA2275, Input Source Selection, Select the desired Source with

Figure 11

Figure 9

How to Operate the MA2275

How to Operate the MA2275

Power On and Off

Press the POWER switch to ON, the Red LED above the STANDBY/ON Push-button lights to indicate the MA2275 is in Standby Mode. To

Switch On the MA2275 press the STANDBY/ ON Push-button on the Front Panel or the POWER Push-button on the Remote Control.

The title TUBE WARMUP will illuminate on the Front Panel (located to the right of the STANDBY/ON Push- button) with the Audio Outputs muted until the tubes reach operating temperature. Refer to figures 9 and 10.

Notes: 1. For normal operation,
switch the MA2275 On
and Off with the
Standby/On Push-
button. If the Tube
Integrated Amplifier is
not going to be used for
an extended period of
time, turn Off all AC
Power with the Power
Switch on the Front
Panel.
2. The amount of time
required for Tube
Warmup is dependant
upon the temperature of
the Tubes inside the
MA2275 when the
STANDBY/ON Push-
button is depressed.
3. If there is an
interruption of AC
Power to the MA2275
while it is On, the
internal circuitry will
sense this condition
and will automatically
switch the MA2275
back On when AC
Power is restored.
Input Source Selection
Select the desired Source with
the INPUT Selector Control or
the Source Push-button on the
Remote Control.	Figure 10

Note:For an explanation of the Remote Control Push-button functions, refer to pages 18 and 19.

Bass and Treble Controls

Adjust the BASS and TREBLE controls to suit your listen- ing preferences. The Bass or Treble intensity can be in- creased with clockwise rotation and decreased with coun- terclockwise rotation.

Meter Mode Selection

Rotate the Meter Mode Switch to select the meter opera- tion mode you desire. Refer to figure 11 and 12.

Lights Off - Meter lights are turned off and the meter will continue to indicate

the power output. Watts- The meters respond to

all the musical infor- mation being pro- duced by the ampli- fier. They indicate to an accuracy of at least 95% of the power output with

only a single cycle of a 2000Hz tone burst.

Figure 12

Hold - The meter pointer is locked to the highest power peak in a sequence of peaks. It is elec- tronically held to this power level until a higher power peak passes through the amplifier. The meter pointer will then rise to the newer higher indication. If no further power peaks are reached, the meter pointer will very slowly return to its rest position or lower power level. The decay rate is approximately 6dB per minute.

Balance Control

Adjust the BALANCE Control as needed to achieve ap- proximately equal listening volume levels in each Loud- speaker. Rotate the BALANCE Control clockwise to em- phasize the Right Channel by reducing the volume level of the Left Channel. Rotate the BALANCE Control counter- clockwise to de-emphasize the Right Channel until equal Balance of both Channels is achieved.

15