OSD Audio MI-5 - Manual (Page 4)

Master Level Control
Each channel is able to control its volume independently relative to the
other channel. At the bottom left of the rear panel, there are 2
screwdriver adjustment knobs which correspond to the volume level of
the channel identified by a channel designator below it.
The volume range is labeled Minimum to Maximum and has 1 steps
(clicks) at a center position as a reference. Rotate the knob clockwise
to increase output, and counter clockwise to decrease output.
These adjustments set the master level and if not set up an initial setup
of the MI5 Powered Amplifier will or may adversely affect the
performance of the amplifier.
To set the Master Lever controls begin by adjusting the front panel
“Volume Trim” to its fully clockwise position. Also set the front panel
“Balance Trim” to its center position. Now adjust both the left and Right
Channel Master Level controls to set a “Maximum” desired volume for
the MI5 Powered Amplifier in its application, as well as setting an
appropriate “Balance” from left to right.
Now the front panel Volume and Balance Trim controls can make fine
adjustments to your set up in this application.
RCA input
There are a total of 4RCA inputs on the back panel of the MI5 Powered
Amplifier. These RCA inputs are labeled as “Line 1 Input” and “Line 2
Input”. They are also designated with an “R” or an “L” as Right channel
or Left Channel inputs respectively.
“Line 2 Input” should be used as the “primary” or normal input for
various line level sources that may be available locally to the amplifier.
“Line 1 Input” is a priority switching input that can be used for a second
input, such as, the output of a second source, and will take over as the
primary input whenever a signal with a minimum of 5mv of level is
present. Whenever, there is an absence of signal at the “Line 2 Input”
RCAs input signal. An adjustable delay of from 3 motet the nature of
the source connected to the “Line 1 Input” RCAs.
As an example, if the “line 1 Input” source was a CD Changer, The delay
could be adjusted to prevent switching back to the “Line 2 Input” source
while the changer moves from one disk to another.
Speaker Level Input
The MI6 Powered Amplifier also provides a pair of speaker level input
for those applications where either of the sources has only speaker
level output signal available. This input may be switched to be used in
place of the line 1 or line 2 input.
Mode Switch
To the right to the master Level controls is a switch labeled “MODE” with
“STEREO” and “BRIDGED” as options. If you will be connecting one or
two pair of speaker to the amplifier, place the switch in the “STEREO”
position.
If you will be suing a pair channel to power a single mono speaker,
place the switch in the “BRIDGED” position, and be sure to read the
section titled “Speaker Terminals” below.
When you are using the amplifier in “Bridged Mode”, the amplifier is
now a single channel mono amplifier. The two channels have been
internally connected in series by the “Bridge” switch. The MI6 Powered
Amplifier is now capable of 250W, bridged into 8 ohms with less than
0.2% THD+N.
For the amplifier to operate properly in the bridged mode you should
have both the “right and left” inputs connected to the amplifier. The
amplifier will sum these signals and create your mono source.
Speaker Terminals
Each channel has two pair of multi-way binding post. These are the red
and black screw posts on the rear of the amplifier. Terminals are
provided for “A” and “B” Pairs of speaker for each channel. If you will
be suing the amplifier as a stereo amplifier (not a bridged amplifier) you
will connect the speakers positive (Red) terminal to the amplifiers
positive (Red) terminal using the appropriate gauge speaker wire, and
the speakers negative (Black) terminal to the amplifiers negative
(Black) terminal (immediately below the positive terminal) using the
appropriate gauge speaker wire. If you would like to use on pair of
channels bridged, place the “mode” switch in the “bridged” position and
use both red terminals to connect to the speaker. (See illustration on
page 5)
4
Note: This Amplifier will produce excess of 200 watts with a
bridge pair of channels. Please verify that your speaker are
capable of handling suck power to avoid possible damage!