Source
and
Power Connections
9.
Plug the Bluetooth
®
antenna into the
BT ANT
connector on the rear panel. Tighten the
thumbscrew to secure it in place, then position the antenna vertically.
10.
Plug one end of a stereo RCA cable (not included) into the
CD
inputs on the rear panel, taking
care to plug the right channel plug (red) into the red RCA jack and the left channel plug (usually
black or white) into the white RCA jack.
11.
Plug the other end of the RCA cable into the audio output jacks on your CD player (or other
source device), taking care to plug the right channel plug (red) into the red RCA jack and the
left channel plug (usually black or white) into the white RCA jack.
12.
Plug the included AC power cord into the
AC IN
socket on the rear panel. Plug the other
end into a nearby AC power outlet.
Bluetooth Connection
This amplifier features a built-in Bluetooth radio with a range of up to 32 feet (10 meters) for
streaming audio from your mobile device. It can remember up to 8 pairings and will automatically
drop old connections when pairing with a full list. Perform the following steps to connect your
mobile device to the amplifier's Bluetooth radio.
13.
Depress the power button on the front panel to turn the amplifier ON.
14.
Flip the Source Selection Switch to the
BT
position.
15.
Open the Bluetooth settings on your mobile device and initiate a scan for nearby Bluetooth
devices.
16.
Locate and select the
MP TUBE
entry. If prompted for a passcode, enter four zeroes (0000).
Congratulations! Your amplifier is now properly setup and ready for use!
MAINTENANCE
Note that after years of use, vacuum tubes will not perform as well as when they are new. This
may result in audible distortion at moderate volume levels. If this occurs, you should replace the
vacuum tubes with new tubes of the same type. Since these are not power tubes and no
biasing is required, you can safely replace them yourself.
TECHNICAL SUPPORT
Monoprice is pleased to provide free, live, online technical support to assist you with any questions
you may have about installation, setup, troubleshooting, or product recommendations. If you ever
need assistance with your new product, please come online to talk to one of our friendly and
knowledgeable Tech Support Associates. Technical support is available through the online chat
button on our website
www.monoprice.com
during regular business hours, 7 days a week.
You can also get assistance through email by sending a message to
9
4
INTRODUCTION
Thank you for purchasing this amplifier from Monoprice!
This amplifier utilizes a hybrid design, which combines a tube preamplifier section with a solid
state class AB power amplifier stage. The advantage of listening to a sound system utilizing
tubes is a warmth and depth of sound not possible with systems that are only digital or analog
solid state. There are however some things you should know if you are a first time user of
classic tube amp designs.
1.
Transformer hum: The nature of tubes and transformers can produce a natural hum
emanating from the transformer. This hum should not be audible through the speakers, but can
be concerning for first time users. As long as moderate listening levels mask the hum, there is
nothing wrong with your Tube Amplifier.
2.
Tubes generate heat: Be sure to always keep items clear of this tube amp. When the amp is
used for prolonged periods of time, the tubes will generate a considerable amount of heat. Let
the amp cool off before moving it after use. The heated elements of the tube are very fragile and
get damaged easily if shaken after use.
This amp includes a line level stereo RCA input and a Bluetooth
®
4.0 radio with the aptX
®
audio
codec for wireless connections with mobile devices.
FEATURES
•
Hybrid design combines the tube sound with the power of solid state amplifiers
•
Tube preamplifier stage
•
Solid state class AB power amplifier stage
•
Built-in Bluetooth 4.0 radio with aptX audio codec
•
One line-level stereo RCA input
•
Dual RCA line level outputs for use with powered speakers.
•
5-way binding posts for speaker level outputs
•
Classic, lighted analog VU meter design
CUSTOMER SERVICE
The Monoprice Customer Service department is dedicated to ensuring that your ordering,
purchasing, and delivery experience is second to none. If you have any problem with your order,
please give us an opportunity to make it right. You can contact a Monoprice Customer Service
representative through the Live Chat link on our website
www
.
monoprice
.
com
during normal
business hours (Mon-Fri: 5am-7pm PT, Sat-Sun: 9am-6pm PT) or via email at
support
@
monoprice
.
com
PACKAGE CONTENTS
Please take an inventory of the package contents to ensure you have all the items listed below.
If anything is missing or damaged, please contact Monoprice Customer Service for a replace-
ment.
-
1x Hybrid class AB integrated amplifier
-
1x Bluetooth antenna
-
2x 6N2 vacuum tubes
-
2x 6P1 vacuum tubes
-
1x AC power cord (IEC 60320 C13 to NEMA 5-15)
-
1x User's manual