McLelland AMP-235 User manual

2-Channel Digital Amplifier
McLELLAND
AMP-235
User Manual

2
The lightning ash 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 sucient magnitude to constitute a risk of electric
shock to persons.
The exclamation point within an equilateral
triangle is intended to alert the user to
the presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the appliance.
SAFETY INSTRUCTIONS
CAUTION: TO REDUCE THE RISK OF ELECTRIC
SHOCK, DO NOT REMOVE THE COVER. NO USER-
SERVICEABLE PARTS INSIDE. REFER SERVICING
TO QUALIFIED SERVICE PERSONNEL.
WARNING: TO REDUCE THE RISK OF FIRE
OR ELECTRIC SHOCK, DO NOT EXPOSE THIS
APPLIANCE TO RAIN OR MOISTURE.

All McLELLAND amplifers are designed with special circuitry to safeguard the amplifer
ventilation and/or when speaker impedances are below the minimum levels for the
does not allow 6” on-center holes, but the AMP-235 can be secured on either side and
1. Mounting into a structured wiring type behind-the-tv box. The width of the AMP-235
The mounting wings on the sides of the AMP-235 can be used for various mounting
3. Wall Mounting (screws not included) – The installer can easily mount the AMP-235 to
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Introduction
The McLELLAND AMP-235 is a 2-channel low-profle amplifer, designed to be used to bring
Better Sound for TV by allowing a high quality, easy-to-use, easy-to-install amplier to be
added to any television installation.
Its thin footprint means the AMP-235 can be hidden behind the television or mounted in
an in-wall panel behind a television for convenience. The built-in IR learning function
allows for ANY typical remote control to be used and eliminates the need for an external
control system. This can dramatically reduce the cost of adding additional rooms of
audio to a home and keeps the operation simple and intuitive for the homeowner by
letting them use their current remote control device.
The 2 channels of amplication are available for up to two pairs of 8-ohm speakers, while
also oering a connection for a subwoofer to enhance a room’s sound.
The AMP-235 provides an array of useful features, such as IR Learning, use of a high quality
low-prole external IR sensor, an LED Power Light that can be toggled on and o, as well
as a low-prole chassis design.
The high quality class-D digital amplifer sends a respectable 35 Watts per channel of
power into 8 ohms. There is a line level subwoofer output to support 2.1 Audio, making
the AMP-235 an easy solution for improving the audio quality in any room with enhanced
bass response.
The AMP-D235 features three input options for fexibility. A traditional analog RCA line level
input, and both Digital Coax and Optical S/PDIF. The AMP-235also supports 24bit/96khz
digital audio in a PCM stereo format.
Product Features
• Class-D amplifer 2 x 35W RMS into 8 ohm
• 24-bit/96kHz S/PDIF support
• S/PDIF, optical and analog line level inputs
• 4-pole speaker detachable screw connector and line level RCA subwoofer output
• IR Learning for basic volume control.
• Small footprint with mounting options for discreet installation
• External 24v power supply
PRODUCT OVERVIEW
Thermal Protection
under a thermal overload condition. Thermal protection mode can only engage when
the unit has been run at high volume for extended periods of time without adequate
amplier. If this fault occurs, turn o the amplier, and check that the speaker impedance
rating is above the minimum rating. Also check for adequate ventilation around the
amplier and make adjustments if necessary. Once the unit has cooled to safe operating
temperatures, the amplier may be powered back on.
Protection Circuitry
under a short-circuit condition. A faulty speaker can also cause a short circuit condition.
The front panel LED illuminates orange when the amplier is in short circuit protection.
If this fault condition occurs, turn o the amplier and check speakers for short circuit
conditions when appropriate.
Mounting
options:
a simple Zip Tie can be used for securing the amplier in any location within the
structured wiring box.
2. Mounting to the rear of a TV using any 3rd party VESA type mounting panel, or
simply by attaching it to a TV mount. The thin form factor allows it to t on many tilt or
pivot type mounts. In this type of installation, it is recommended to disable the Power
LED light so that it does not bother the end user.
a wall or cabinet.
McLELLAND

external IR receiver is used to control the volume of the AMP-235 using a standard remote
The AMP-235 features IR learning for the purpose of using a pre-existing TV or Universal
he AMP-235 comes supplied with a small credit card sized three button remote control
Provides a visual conrmation that the AMP-235 is receiving IR Signals
control once the commands have been taught to the AMP-235.
of the AMP-235 for controlling volume and mute.
We recommend using 6-8 ohm speakers with the AMP-235.
The AMP-235 requires a 24VDC (3.75A) power supply which is included.
outlet, or from the rear of the AMP-235.
AMP-235 RC Remote Control
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FRONT PANEL CONNECTORS
1Power Switch: Turns the amplier On/O. This switch does not disconnect the main
power feed from the amplier; this requires that the power cord be unplugged from the
2Power LED: On start-up, the power LED (next to the power switch) lights red to show
power on. This will remain on, but can be disabled to remove distraction when installed
behind a TV.
Note: Disabling the LED will only disable the "normal" power status LED. The LED will
always illuminate for any trouble conditions and for the rst 2 minutes during power up
of the device.
3Power Supply:
The external dual voltage 24VDC 3.75A power supply provides high output power to
support the full range of amplier operation.
By using an IEC compatible outlet, international customers will be able to easily swap
power cords with the appropriate plug type for their market.
4Speaker Outputs: The speaker outputs are in parallel to the zone amplier output.
5Subwoofer Output
6Audio Line Input: Analog stereo audio input for a single input source.
7Optical Input: Digital optical input for a single input source.
8Coaxial Input: Digital coaxial input for a single input source.
9IR Sensor: Receives the IR commands during the IR Learning process.
This sensor is used only for IR Learning. The external IR Receiver is used during operation
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IR Input: 3.5mm jack for an IR Receiver. A Russound IR Receiver is included.If wiring
your own 3.5mm plug to a receiver, the tip - is positive and the sleeve is negative. The
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IR Conrm LED:
when in the IR Learning Mode only.
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IR Learning Button: Press for 2 seconds to initiate the IR Learning mode feature.
Press and Hold for at least 10 seconds during power up to toggle the use of the Power
LED during normal operation.
Remote Control
T
that can be used for independent volume commands if a 3rd party remote control system
is being used. For most installations, the supplied credit card remote will not be used.
Remote.
MUTE
IR CONTROLLER
AMP-235 Digital Amplifier
12 3 4 5 678 1211109

-235 Amplifier I
The AMP-235 features a removable, screw-down speaker terminal.
connections should only be made while the AMP-235 is powered o.
The AMP-235 is designed to be used with a pair of either 6 or 8 ohm speakers. Speaker
2. If using a digital audio signal from your TV to the AMP-235, make sure that the TV is
1. Disable TV Speakers - Since you will be using the AMP-235 for all of your TV audio, your
Certain settings must be changed on the TV when using the AMP-235. Refer to your TV's
After powering on the AMP-235 Amplier, the Power LED will always remain on for
on the AMP-235 until the IR LED (next to the IR Learning Button) begins to blink. The IR
The AMP-235 exits the IR Learning Mode automatically after learning the Mute
Simple Programming Instructions
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PROGRAMMING INSTRUCTIONS
Learning IR Mode Setup
This process allows you to learn the three volume-related IR commands
(Vol +, Vol -, and Mute) from your current remote control.
1. Press the IR Learning Button for 2 seconds until the IR Conrm LED blinks slowly.
2. Place your remote control about 3-4 inches (7-10cm) away from the IR Learning
window of the TVA2.1, aiming the remote directly at the IR Learning window.
3. Press the TV remote’s Vol + key until the IR Conrm LED blinks for 1 second.
4. Press the remote’s Vol – key until the IR Conrm LED blinks for 1 second.
5. Press the remote’s Mute– key until the IR Conrm LED blinks for 1 second.
6. Conrm proper operation of all three volume commands. If any of the three
commands must be re-learned, all three commands must be re-learned in order.
Repeat ALL 6 steps again; then re-test for proper operation.
Note:
command.
The Vol +, Vol -, and Mute commands must be learned in sequence
(1st Vol+, then Vol -, then Mute.)
Power LED Disabling (Toggle)
In some installations, such as bedrooms, it may be desirable to disable the Power LED so
that it is not visible in a dark room.
To disable the Power LED:
1. Press and hold the IR Learning Button for approximately 10 seconds while powering
Conrm LED will blink twice when toggling from "Enabled" to "Disabled" and will blink
once when togging from "Disabled" to Enabled". Once the IR Conrm LED has blinked,
you can release the IR Learning Button.
Note:
the rst 2 minutes of operation EVEN IF you have disabled it. If the Power LED has been
disabled, it will turn o after 2 minutes has passed.
The LED will always illuminate for any trouble conditions. Disabling the LED only aects
the LED for normal status conditions. To Enable the Power LED, repeat the same process.
TVA2.1RC Remote Control
TV Settings
owner's manual for exact instructions for your particular TV. These settings are typically
found in the TV's setup conguration menu.
TV's internal speakers should be disabled.
congured to use stereo PCM for its audio output.
Connecting loudspeakers
Typical AMP nstallation
IR
Receiver
Remote Control
Subwoofer
Power Supply

KG
Weight:
(18.4x 21.6 x 3. cm)
7.25”H x 8.5”W x 1.2”D
20Hz to 20KHz +3dB
>90dB (1KHZ)
Speaker out - removable screw-down connector for up to 14AWG wire,
35W per channel at 8 ohms <1% THD+N
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TECHNICAL SPECIFICATIONS
Audio Inputs: Stereo Line Level, coaxial or optical (PCM format)
Outputs:
Subwoofer out - (RCA) with integrated 120Hz low pass lter
IR Sensor Input: 3.5mm stereo jack
Amplier Channels: 2
Signal-to-Noise Ratio:
Frequency Response:
Input Impedance: >47K ohms
Power Requirements: 24VDC 3.75A (External power supply)
Dimensions:
0.7