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INTRODUCTION
INTRODUCTION
Thank you for purchasing the 50-20810. The 50-20810 uses a STMicroelectronics TDA7498E Audio Amplifier for
amazing performance and clarity with superb power handling and efficiency. Built-in thermal overload and short-
circuit protection combined with the selection of only the highest quality components ensures your 50-20810 will
provide you with years and years of audiophile quality listening enjoyment. Your 50-20810 includes RCA
Left/Right line level inputs found on the rear of the amplifier. If your device does not have a RCA Left/Right
output you can use an adapter cable such as a 3.5mm to RCA Cable or other line level cables that meet your
source device's type of output. The 50-20810 includes Bluetooth streaming audio. Use the Bluetooth aptX
connection to wirelessly stream audio from your iPhone, Android smartphone, tablet, or laptop. The aptX codec
produces better quality sound than standard Bluetooth when used with aptX compatible devices. With 100 watts
per channel, the 50-20810 stereo amplifier is perfect for desktops, bookshelf speakers, and most home audio
applications. Included with your 50-20810 is a 36VDC power supply that provides the horsepower for your
50-20810 to fill any room with quality sound and performance.
AUDIO IN
L
R
R OUT
DC 18-36V
ANT
L OUT
CONNECTING SPEAKERS
CONNECTING SPEAKERS
The 50-20810 features binding posts for more convenient speaker connection. These binding posts will accept
bare wire, 3/8" spade terminals, or standard banana plugs. Note: The binding posts will accommodate dual
banana plugs.
USING LINE LEVEL INPUT
Many portable music players use a 3.5mm jack to play music through headphones. Connect a 3.5mm to RCA
cable between the source headphone out and the amplifier's line input. If the source device is not portable it likely
uses RCA stereo cables. Connect a stereo audio cable from the source device to the amplifier's line input.
USING LINE LEVEL INPUT
USING THE BLUETOOTH CONNECTION
USING THE BLUETOOTH CONNECTION
The Bluetooth audio source device must be paired and connected to the 50-20810 to play music wirelessly from
your phone, tablet, or other music player.
AMPLIFIER
AMPLIFIER
Turn the power switch to “Off”
Set the select switch to “Bluetooth”
Turn the power switch to “On”
MOBILE DEVICE
MOBILE DEVICE
On your mobile device select “HiFi” from available devices to pair the devices
From “Paired Devices” list select “HiFi”
Under Settings, select “Use for media audio”
The 50-20810 will emit a beep to let you know that the mobile device is paired and selected. Adjust the
output level of the mobile device to approximately 75% for best sound quality and adjust the master volume on
the amplifier to set the ideal listening level.
NOTE
NOTE
It is normal for some Bluetooth devices to require a little more time to pair Bluetooth with your 50-20810. If you
have trouble pairing and connecting to the amplifier simply repeat all of these steps for the amplifier and mobile
device several times until you have a successful pairing. Your Bluetooth enabled device should remember the
50-20810 in the future and not require this extra effort before the amplifier will play music from the mobile device.
OPERATION
Connect 4-8 Ohm speakers to the binding posts
Plug the power supply into the amplifier then into the wall outlet
LINE LEVEL IN: Connect a line-level device to the RCA inputs and set input to “Select”
BLUETOOTH: Turn on the amplifier, set the input switch to BLUETOOTH follow pairing instructions
Adjust the volume to the desired listening level
OPERATION
