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Introduction
Thank you for purchasing the X-A50, 50 watt monobloc power
amplifier.
We sincerely hope that it will bring you many years of listening
pleasure.
Installation Precautions
Your new X-A50 is designed and built to provide trouble-free
performance, as with all electronic devices it is however necessary to
observe a few precautions. Please ensure that you have complied
with these before you connect the power to your X-A50. Retain this
guide for future reference.
n nDo not use the X-A50 near water.
n nKeep the X-A50 away from heat sources such as
radiators.
n nPlace all connecting cables where they are not likely
to bewalked on or trapped by items placed on them.
This Hi-Fi product has been tested to ensure that its operation
will not be adversely affected by normal background levels of R.F.I.
(Radio Frequency Interference). It is possible that if the unit is sub-
jected to abnormally high levels of R.F.I. the unit may not perform as
expected. In the unlikely event of this happening please contact
Musical Fidelity's service department.
Do not remove any covers, the X-A50 will not be covered under
warranty if it has been tampered with. There are no adjustments
within. Please refer all service work to an authorised Musical Fidelity
agent.Connections
All connections should be made before the mains lead is
plugged in and the unit switched on.
The X-A50 is a mono power amplifier, two are required for
stereo operation, further units can be used if required for multi
channel surround sound systems or for bi-amping etc.
The X-A50 can be used with a preamplifier or any line level
source which has a volume control. We highly recommend the
matching X-PRE Class A Tube Preamp as an excellent choice.
Connect your pre-amp or other line level source to the phono
input on the back panel marked "Line Input". For the best results we
recommend that you use Musical Fidelity X-LINX "no-nonsense"
interconnect cables for this connection.
Connect your loudspeaker to the loudspeaker terminals situated
on the back panel marked "Loudspeaker Output"
Once these connections are made, plug in the IEC type mains
lead and switch on the unit.
Bi-Amping
The X-A50 has a "Loop Out" facility to allow for easy bi-
amping of speakers with bi-wireable crossovers. In this kind of set-
up typically one X-A50 is used to drive the tweeter (high frequen-
cies) and one to drive the woofer (low frequencies) of each loud-
speaker enclosure. Thus in this example four X-A50s would be
required for a stereo pair.
Taking the left channel connections first, the pre-amp's (or other
source's) left output is first connected to the first X-A50's line input
and then that X-A50's loop output is connected to the second
X-A50's line input, both X-A50s will now be driven from the same
left channel signal. The first X-A50 can now be used to drive the
woofer and the second, the tweeter of the left channel loudspeaker.
Repeat this process for the right channel.
If you are in any doubt about bi-amping, please contact your
dealer who will be able to help and advise you.
