OSD Audio MI-5 User Manual

Page 4

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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”


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)


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!

This manual is related to the following products: