MC850 Operations Manual Rev F
Page 6
Table of Contents
Top
5
Welcome
Congratulations on the purchase of your new Stewart Audio MC850 Multi-channel audio amplifier. This
amplifier has been designed and built to provide you with years of high-quality audio performance and
trouble-free operation. If after reading this operation manual you have questions concerning amplifier
installation and operation, please contact your Authorized Stewart dealer, or you may contact us directly
using the contact information provided on the back of this guide.
5.1
Features
The MC850 amplifiers offer 8 channels of audio with nominally 50W output power per channel.
The output power can be allocated up to a maximum of 125W (low impedance) or 100W (constant
voltage) per channel as long as the 200W/ 4 channel limit is not exceeded. (See
Section 7.2.2.6
for
more information.) These network-enabled models employ the Dante™ audio transport protocol
to deliver low latency audio over category 5e/6 cables via a 100/1000BaseT network. The low
impedance model
(LZ) operate into 4Ω or 8Ω loudspeakers, while the constant
voltage or high
impedance model (CV) are designed to be used with one or more high impedance loudspeakers
per channel. The mixed impedance model (MXZ) operates into 6 channels of high impedance
loudspeakers and 2 channels of
4Ω or 8Ω loudspeakers
. All models offer control and status via the
Ethernet control port using Stewart Audio’s Multichannel Amplifier Control and Status application.
Output level control is also available over an RS-232 interface for legacy controllers.
5.2
Unpacking and Visual Inspection
Every Stewart Audio product is carefully tested and inspected before leaving the factory and
should arrive in perfect condition. If any damage is discovered, please notify the shipping carrier
immediately. Save the packing materials for the carrier’s inspection and for any future shipping.
5.3
Installation and Setup
5.3.1
Rack Mounting
The MC850 is designed for rack mounting in a standard 19” rack using the rack mount brackets
supplied with the amplifier. The CV and MXZ models weigh in excess of 10 pounds (4.5kg). While
the design places the center of mass of these amplifiers near the front panel,
it is strongly advised
that the rear of the enclosure be supported using the #6-32 tpi threaded nut in the center of the
back panel.
5.3.2
Cooling and Ventilation
Ensure that there is sufficient open space around the amplifier to allow for free air flow. The
MC850 contains no fans and thus relies on convection cooling. Do not block the ventilation holes
or slots. Use the following chart to determine cooling requirements for your application.
Operating Mode
Power consumption
(W)
Power dissipated
(W)
Energy dissipated
(BTU/hr)
Standby (non-operational)
4.1
4.1
14
Idle (operational, no input signals)
28
28
96
1/8 rated audio power
103
53
181
50W/channel audio power
585
185
631
