OUTPUT
To the right of the Speaker Out connectors is a switch labeled
:Mode” with “Stereo” and “Bridged” as options. It is used to
switch the output mode of MI4.
If you will be connecting a pair of speakers to the amplifier,
place the switch in the “Stereo” Position. If you will be using a
pair channels to power a single mono speaker, place the
switch in the “Bridged” position.
The MI4 Power Amplifier has 2 channels outputs. Each
channel has a pair of multi-way binding post connectors.
These are red and black screw posts on the rear panel of the
amplifier. Terminals are provided for “L” and “R” output. If you
will use the amplifier with a stereo mode(not a bridged mode),
connect the speaker’s positive(Red) terminal to the amplifier’s
positive(Red) terminal using the appropriate gauge speaker
wire, and connect the speaker’s negative(Black) terminal to
the amplifier’s negative(Black) terminal(immediately beside
the positive terminal) using the appropriate gauge speaker
wire.
If you would like to use the amplifier with “Bridged” mode,
place the “Mode” Switch in the “Bridged” Position to be a single
channel mono amplifier, the two channels will be internally
connected in series. You will use both Red terminals to connect
to the speaker, the “L” channel’s Red terminal will be positive
terminal and the “R” channel’s Red terminal will be negative
terminal under “Bridged” mode.
Note:
The minimum impedance for the total load
connected to a pair of channels in the “Bridged”
mode is 8-ohm.
MI4 Power Amplifier Specifications
Power Bandwidth: 20Hz - 20kHZ
50W per Channel into 8 ohms loads with less than 0.05% THD+N
65W per Channel into 4 ohms loads with less than 0.1% THD+N
130W Bridged Mono into 8 ohms with less than 0.1% THD+N
Crosstalk: >60dB@1KHz, referred to rated power at 8 ohms
Frequency Response: (25Hz to 50kHz) +0dB, -1.0dB
Signal to Noise ratio: >98dB
RCA Line Input Sensitivity: 220mV (Max)
Speaker Input Sensitivity: 2.3V (Max)
AC Power Consumption:
Dimensions: 19"w x 7.87"d x 2.85"h,
“1.5U Option Rack Space Style”
Net Weight: 5.65 kg
Gross Weight: 6.25 kg
AC Mains Fuse:
115V~60Hz T3.15AL, 250V
230V~50Hz T3.15AL, 250V
Note:
This amplifier will supply 130W in “Bridged”
mode. Please verify that your speakers are capable of
handling such power to avoid possible damage!
360W (All Channels Driven)
NOTE:
This amplifier is capable of use with standard US
voltage (115V) as well as European voltage (230V). The
amplifier will be preset for the voltage of the country it is
sold in. Use with other voltages requires some changes
to be made to the amplifier. Should you wish to use the
amplifier in a country other than the one for which it was
purchased,
please contact OSD AUDIO at (562) 697-
2600.
Limited Warranty
OSD AUDIO: warrants its amplifier products against defects in
materials and workmanship for a limited period of time. For a
period of two years from date of original purchase, we will
repair or replace the product, at our option, without charge for
parts and labor.
This limited warranty applies only to purchases from
authorized OSD AUDIO retailers. This limited warranty is
extended only to the original purchaser and is valid only to
customers in USA.
Customers are required to provide a copy of the original sales
invoice from an authorized OSD AUDIO dealer when making a
claim against this limited warranty. This limited warranty only
covers failures due to defects in materials or workmanship that
occur during normal use. It does not cover failures resulting
f r o m a c c i d e n t , m i s u s e , a b u s e , n e g l e c t , m i s h a n d l i n g ,
misapplication, alteration, faulty installation, modification,
service by anyone other than OSD AUDIO or damage that is
attributable to acts of god. It does not cover costs or
transportation to OSD AUDIO or damage in transit. The
customer should return their defective product, freight prepaid
and insured, to OSD AUDIO, only after receiving a Returned
Merchandise Authorization (RMA) number.
This warranty will become void if the serial number
identification has been wholly or partially removed, altered or
erased. Repair of replacement under the terms of this warranty
does not extend the terms of this warranty. Should a product
prove to be defective in workmanship or material, the
customer’s sole remedies will be repair or replacement as
provided under the terms of this warranty. Under no
circumstances shall OSD AUDIO be liable for loss or damage,
direct, consequential or incidental, arising out of the use of or
inability to use the product.
Whenever you are using speakers outdoors, you should
be aware that sound does not travel like it would be in
your home. Without the reflective surfaces of walls and
ceilings, sound at outdoors will dissipate quickly.
Therefore, in an outdoor situation the MI4 Power
Amplifier provides the opportunity to bridge adjacent
channels, effectively doubling the available power for
your speakers. This can help to overcome the problem of
using speakers outdoors assuming the speakers chosen
are capable of handling the additional power.
It should be noted that the MI4 Power Amplifier is rated
to operate into a minimum 8-ohm bridged load.
Therefore, if you are using more than a single 8-ohm
loudspeaker in bridged mode you should consider using
an impedance matching speaker selector, such as the
SSVC-6 or possibly using an impedance matching
volume control, such as the SVC 70, SVC 100, SVC 300,
VKR 120, VMS 100 or VMX 300 in a weatherproof
housing available at your favorite DIY store or electrical
supply. The choice of a volume control would allow you
the additional flexibility of being able to attenuate the
volume whenever necessary.
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