Owners Manual

13
Speaker Outputs
See Figure 3
Speaker Selection
We recommend using loudspeakers with a nominal impedance of 4 ohms or
higher with the amplifier. The dual output binding posts are ideal for bi-wire
installations allowing 4 pairs of wires to drive the HF and LF speakers each
with individual wires from the left or right channel of the amplifier. Speaker
impedance ratings are less than precise so use care when selecting the
loudspeakers to attach to the amplifier. In practice, very few loudspeakers
will present any problems for the amplifier. See your authorized Michi dealer
if you have any questions.
Speaker Wire Selection
Use insulated two-conductor stranded wire to connect the amplifier to the
speakers. The size and quality of the wire can have an audible effect on the
performance of the system. Standard speaker wire will work, but can result in
lower output or diminished bass response, particularly over longer distances.
In general, heavier wire will improve the sound. For best performance, you may
want to consider special high-quality speaker cables. Your authorized Michi
dealer can help in the selection of cables for your system.
Polarity and Phasing
The polarity – the positive/negative orientation of the connections – for every
speaker and amplifier connection must be consistent so all the speakers will
be in phase. If the polarity of one connection is reversed, bass output will be
very weak and stereo imaging degraded. All wire is marked so you can identify
the two conductors. There may be ribs or a stripe on the insulation of one
conductor. The wire may have clear insulation with different color conductors
(copper and silver). There may be polarity indications printed on the insulation.
Identify the positive and negative conductors and be consistent with every
speaker and amplifier connection.
Speaker Connections
t
NOTE: The following text describes both binding post and plug-in
connections. DO NOT use both connection methods in combination to
connect multiple speakers.
Turn off all the components in the system before connecting the speakers. The
amplifier has color-coded binding post connectors on the back panel. These
connectors accept bare wire, connector lugs, or dual banana type connectors.
(except in European Community countries where their use is not permitted.)
Route the wire from the amplifier to the speakers. Give yourself enough slack
so you can move the components to allow access to the speaker connectors.
If you are using dual banana plugs, connect them to the wires and then plug
into the backs of the binding posts. The thumbscrews of the binding posts
should be screwed in all the way (clockwise).
If you are using terminal lugs, connect them to the wires. If you are attaching
bare wires directly to the binding posts, separate the wire conductors and strip
the insulation from the end of each conductor. Be careful not to cut into the
wire strands. Unscrew (turn counterclockwise) the binding post. Place the
connector lug or wire around the binding post shaft. Turn the binding post
clockwise to clamp the connector lug or wire firmly in place.
NOTE: Be sure there are no loose wire strands that could touch adjacent
wires or connectors.
Bluetooth Connection
w
The Bluetooth Antenna w on the amplifier’s back panel is for wireless
streaming via Bluetooth, from your device (i.e. mobile phones). From your
mobile device, look for “Michi Bluetooth” and connect to it. Connection is
normally automatic, but if prompted for a password, please press “0000” on
your device. The amplifier supports both traditional Bluetooth, AAC and APTX
Bluetooth audio streaming.
EXT REM IN Jack
i
This 3.5mm mini-jack receives command codes from industry-standard infrared
receivers via hard-wired connections. This feature could prove useful when
the unit is installed in a cabinet and the front-panel sensor is blocked. Consult
your authorized Michi dealer for information on these external repeaters and
the proper wiring of a jack to fit the mini-jack receptacle.
RS232 [
The amplifier can be controlled via RS232 for integration with automation
systems. The RS232 input accepts a standard straight DB-9 Male-to-Female
cable.
For additional information on the connections, software, and operating codes
for RS232 control of the amplifier, contact your authorized Michi dealer.
Rear USB Power Port
p
The rear USB port is only used for software update.
NOTE: This port does not allow playback of audio but will provide charging
or powering USB devices.
PC-USB Input u
See Figure 4
Connect this input using a PC-USB cable to the USB socket of your computer.
The amplifier supports both USB Audio Class 1.0 and USB Audio Class 2.0
modes. Windows computers do not require installation of a driver for USB
Audio Class 1.0 and support playback of audio up to 96 kHz sampling rates.
The Factory Default setting is USB Audio Class 1.0.
To take advantage of USB Audio Class 2.0 audio playback supporting up to
384 kHz sampling rates you will need to install the Windows driver supplied on
the CD included with the amplifier. You will also need to switch the amplifier
to USB Audio Class 2.0 playback mode with the following:
• Press SETUP on the remote control to enter the SETUP Menu and use the
T
/
D
buttons to select the Source menu then press the Enter
K
button. Use
the
T
/
D
arrow buttons and the Enter
K
button on the remote control
to select “PC-USB” as INPUT SOURCE
• Press SETUP on the remote control to enter the SETUP Menu and use the
T
/
D
buttons to select the AUDIO menu then press the Enter
K
button.