Owner`s manual

54
The following connection instructions and illustra-
tion on the next page are a supplement to the MX151
Zone A Output Connection instructions on page 11
of the Owner’s Manual and the separate folded sheet
“Mc2B” Diagram. It is an example of a typical Home
Theater System. Your system may vary from this,
however the actual components would be connected in
a similar manner. For additional information refer to
“Connector and Cable Information” on page 5 of the
MX151 Owner’s Manual.
Power Control Connections:
1. Connect a Control Cable from the MX151 ZA PC
(Power Control) OUT Jack to the Power Control In
on Zone A Power Amplifier One.
2. Connect a Control Cable from Zone A Power Am-
plifier One Power Control Out to Zone A Power
Amplifier Two Power Control In Jack.
Perform additional Power Control Connections start-
ing with step 3 on page 11 of the MX151 Owner’s
Manual.
Analog Audio Connections:
3. Connect Balanced Audio Cables from the MX151
Zone A - L (Front Left Channel) and R (Front
Right Channel) to Zone A Power Amplifier One
(High Frequencies) Inputs 1 and 3 respectively.
Note: Unbalanced Audio Connections may be used
in place of the Balanced Connections.
4. Connect Balanced Audio Cables from the MX151
Zone A - AUX 1 (Left Front Channel) and AUX
2 (Right Front Channel) to Zone A Power Ampli-
fier Two (Low Frequencies) Inputs Left and Right
respectively.
Perform additional Analog Audio Connections for
the remaining channels, HDMI Connections and AC
Power Cords by refering to steps (6 thru 11) on page
11 of the MX151 Owner’s Manual.
Introduction
The MX151 offers additional Zone A Left Front Chan-
nel and Right Front Channel Outputs, two balanced
outputs and two unbalanced outputs. These Auxiliary
Outputs (1 thru 4) may be used for additional sub-
woofer outputs or for using the MX151 built-in elec-
tronic crossover circuitry. In this guide, the example
will illustrate connections along with Setup Mode
Settings for using the MX151 Electronic Crossover
Circuitry.
Almost all Loudspeakers incorporate acoustic
drivers and a passive crossover network. The passive
crossover network channels the various audio frequen-
cies to the appropriate acoustic driver taking into
account the amplitude and phases of the audio signals
the Loudspeaker reproduces. When an electronic
crossover circuitry in the MX151 is used together with
multiple Power Amplifiers and Loudspeakers, it is
very important to maintain the correct amplitude and
phases of the audio signals for accurate sound repro-
duction.
McIntosh’s Acoustics Laboratory has measured
McIntosh Loudspeakers (with separate Low Frequen-
cy/High Frequency connections) when used with the
MX151 and has arrived at the optimum settings. There
are two different settings. The first setting is for use
with McIntosh Loudspeakers with a Low Frequency
(Woofer) to High Frequency (Midrange/Tweeter)
crossover frequency of 250Hz. The second setting is
when the McIntosh Loudspeaker has a crossover of
80Hz. It is suggested to use these settings.
When the MX151 is used with non-McIntosh
Loudspeakers it is highly recommended to con-
tact your Dealer for assistance. Your Dealer has the
necessary measurement equipment and knowledge to
properly set up the electronic crossover in the MX151
for your Loudspeakers.
Connecting the MX151 when using the
Electronic Crossover