Leon OTO MCA 200 User manual

715 W. Ellsworth Road Ann Arbor, Michigan 48108 | 1.888.213.5015 | www.leonspeakers.com
OTO MCA 200
USER GUIDE

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OTO MCA 200 USER GUIDE
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WARNING:
To reduce the risk of fire or electric shock, do not expose
this apparatus to rain or moisture.
The apparatus shall not be exposed to dripping or splashing and no objects
filled with liquids, such as vases, shall be placed on apparatus, receptacles,
and the point where they exit from the apparatus.
The lightning flash with arrowhead symbol, within an equilateral triangle,
is intended to alert the user to the presence of uninsulated dangerous
voltage; within the product’s enclosure that may be of sufficient magnitude to
constitute a risk of electric shock to persons.
This symbol is intended to alert the user to the presence of important
operation and maintenance (servicing) instructions in the literature
accompanying the appliance.
1. Read these instructions.
2. Keep these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in accordance with the
manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, stoves or any
other apparatus (including amplifiers) that produce heat.
9. Protect the power cord from being walked on or pinched particularly at
plugs, convenience receptacles, and the point where they exit from the
apparatus.
10. Only use attachments/accessories specified by the manufacturer.
11. Do not ‘Hot Plug’. When changing inputs or outputs, switch the Leon
OTO MCA 200 off before making changes. Once changes have been
made, then switch the Leon OTO MCA 200 back.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
ATTENTION
RISQUE DE CHOC ELECTRIQUE
NE PAS OUVRIR
SAFETY INSTRUCTIONS

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OTO MCA 200 USER GUIDE 2
12. Unplug this product during lightning storms or when unused for long
periods of time.
13. Refer all servicing to qualified service personnel. Servicing is required
when the apparatus has been damaged in any way, such as power-
supply cord or plug is damaged, liquid has been spilled or objects have
fallen into the apparatus, the apparatus has been exposed to rain or
moisture, does not operate normally, or has been dropped.
14. This apparatus shall not be exposed to dripping or splashing, and no
object filled with liquids, such as vases or glasses, shall be placed on
the apparatus.
15. Exposure to high sound pressure levels may lead to permanent
hearing loss. Take every precaution to protect your hearing.
16. The remote control comes with a non-rechargeable Lithium battery
installed. Take every precaution when handling and installing new
Lithium batteries, and follow all local and state guidelines for safe
disposal of old batteries. Keep all batteries away from children.
Caution: to reduce the risk of electric shock, do not disassemble the
apparatus. There are no user-serviceable parts inside. Refer servicing
to qualified personnel.
Recycling notice: Always properly dispose of or recycle your end-of-life
electronic products. Contact your local or state recycling authorities
for information on nearby recycling facilities.

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OTO MCA 200 USER GUIDE
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OTO MCA 200 USER GUIDE 4
WELCOME
INTRODUCTION 5
UNPACKING 5
IR REMOTE CONTROL TOUR 6
AMPLIFIER TOUR (FRONT PANEL) 7-8
AMPLIFIER TOUR (LEFT PANEL) 9
AMPLIFIER TOUR (RIGHT PANEL) 10
AMPLIFIER DIP SWITCH CONTROL 11-12
INSTALLATION 13
CONNECTIONS 14
QUICK START 2.0/STEREO SET UP 15-16
BRIDGED MONO 2.0 LINKED SETUP 17-18
STEREO SETUP WITH A PASSIVE SUBWOOFER 19-20
STEREO SETUP WITH A POWERED SUBWOOFER 21
BRIDGED MONO 2.0 WITH POWERED SUB 22
ADJUSTING THE ACCUBASS® 22
DEFAULT VOLUME BYPASS PROCEDURE 23
IR LEARNING PROCEDURE 23-24
ADDITIONAL FEATURES & SUPPORT 25
TROUBLESHOOTING 26
SPECIFICATIONS 27-28
WARRANTY 29-30

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OTO MCA 200 USER GUIDE
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INTRODUCTION
UNPACKING
Remove the OTO MCA 200 from its packaging and inspect it for any shipping
damage. If you discover damage, contact your Leon dealer or a customer
service representative immediately.
If possible, save the carton and internal packaging. It is the best possible
protection for your OTO MCA 200 if you need to move it or return it for
service.
Keep your sales receipt in a secure place. It helps establish the duration of
your warranty and is good for insurance purposes in case anything happens
to your equipment.
PACKAGE CONTENTS
• Leon OTO MCA 200 Amplifier
• OTO MCA 200 IR Remote Control
• AC Power Cord
Congratulations on your purchase of a Leon OTO MCA 200. This was
developed in collaboration with AudioControl®, 40-year veterans of the
performance-audio amplifier industry. The features of the OTO MCA 200
allow it to shine in both analog and digital audio systems, whether in an
audiophile stereo system, a home theater, or a commercial environment.
The amplifier includes a high-performance Wolfson® DAC (digital to analog
converter), and comfortably delivers 100 watts per channel at 8 ohms, 200
watts per channel at 4 ohms, or up to 400 watts bridged.
Additionally, the amplifier features options for control via IR remote, or via
RS232 for easy integration with third-party control systems. With integrated
switchable crossovers, multiple OTO MCA 200 amplifiers can be combined to
drive passive 2.1 systems. The AccuBASS® function allows detailed control
over bass response to help simplify speaker placement and tuning of the
room.
This manual will take you step-by-step through the features and operation of
the OTO MCA 200. Please read it thoroughly and carefully to ensure that you
get maximum performance from the OTO MCA 200. Keep this manual in a
safe place in case you need to refer to it in the future.
• Optical Cable
• 4-pin and 3-pin Euroblock terminal blocks
• Mounting Kits (optional)

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OTO MCA 200 USER GUIDE 6
• Optical Cable
• 4-pin and 3-pin Euroblock terminal blocks
• Mounting Kits (optional)
IR REMOTE CONTROL TOUR
A. Power On/Standby: Press this to awake the OTO MCA 200, or put it into
standby mode. In standby, the OTO MCA 200 will use minimal electricity.
During normal operation, the OTO MCA 200 will enter standby if no input
signal is sensed for about 8 minutes. This auto-standby mode can be
disabled using the Sleep Defeat DIP switch (see Pages 11-12). If the Power
On/Off switch is off, the amplifier will not turn on with the remote control.
B. Volume Up/Down: Press the plus button to increase the volume, and
the minus button to decrease the volume.
C. Mute: Press this button to mute or unmute the amplifier output.
D. Input Selection 1, 2, 3: Press these buttons to select the desired input.
The OTO MCA 200 front panel LED will light to reflect the selected input.
E. Headphones On/Off: Press this to turn on/off the OTO MCA 200
headphone output. All other outputs will be muted and the front panel
headphone LED will light when the headphone output is engaged.
F. AccuBASS® Up/Down: Press the arrows to increase or decrease the
amount of AccuBASS® enhancement.
G. AccuBASS® On/Off: Press this to turn on the AccuBASS® enhancement.
The front panel input LED will glow brighter when AccuBASS® is enabled.
H. Battery Compartment: The battery compartment on the back is
opened by pressing and sliding off the small cover. Remove a small
insulating strip from below the battery before first use. Always replace the
battery with the exact same type (3V lithium CR2032), and with the positive
(+) side facing outward.
A.
B.
C.
D.
E.
F.
G. H.

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OTO MCA 200 USER GUIDE
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AMPLIFIER TOUR (FRONT PANEL)
1. IR Remote Control Window: This is the IR sensor for the included IR
remote. Point the remote in this direction to control the amplifier. Do not
block this port if the IR remote is to be used.
2. On/Standby LED: This LED indicates the power status of the OTO MCA
200.
• Blue – normal operation
• Dim Red – standby mode
• Bright Red – channel mute on power up
• Bright Red 2 – amplifier in protection (see TROUBLESHOOTING, Page 26)
• Flashing Red – speaker fault (see TROUBLESHOOTING, Page 26)
1. 2.

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OTO MCA 200 USER GUIDE 8
3. Input Selection LEDs: These three LEDs indicate which input is
selected. Inputs 1 and 2 are digital inputs, and input 3 is analog. When the
OTO MCA 200 is muted, all input LEDs will be off. When the OTO MCA 200
receives a command from the IR remote or via RS232, the input LED will
flash. The selected input LED glows dimly under normal conditions, and
brighter when the AccuBASS® setting is enabled.
4. Headphone On/Off LED: This LED indicates if the OTO MCA 200
headphone output is enabled. When the headphone output is turned on,
all other outputs from the amplifier are muted. The headphone output is
controlled via the IR Remote.
3.
4.

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OTO MCA 200 USER GUIDE
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AMPLIFIER TOUR (LEFT PANEL)
5. AC Input
6. Power On/Off Switch: This is the master power switch for the OTO MCA 200
amplifier. Keep the amplifier off while making connections or disconnections
from the amplifier. Use this switch to turn the amplifier off if it will not be used
for long periods of time.
7. Voltage Selection Switch: Ensure this is set to your region-specific line
voltage before plugging in the OTO MCA 200.
8. RS232 Control Input: Use this terminal block to connect a third-party
control system. The pins are as follows:
• Pin 1 – RX (RS232 receive)
• Pin 2 – Ground
• Pin 3 – TX (RS232 transmit)
9. Amplifier Control DIP Switches: These DIP switches affect the operation of
the amplifier. See Pages 11-12 for more details.
10. Speaker Outputs: Use this Euroblock terminal block for connections to
your speakers. Make a note of the polarity markings and ensure they match
those of your speakers (+ to +, - to -).
11. IR Output: This 1/8” jack allows a remote IR sender to be connected.
12. Bridged Mono Output: When the OTO MCA 200 is in bridged mode, this
RCA connector outputs the signal from the active input’s right channel only.
It is affected by the volume level, AccuBASS® level, and the 80Hz low-pass
crossover.
5.
8.
6.
9.
7.
10.