X-150 SPECIFICATIONS
Output : Voltage RMS :
29 Volts 20Hz to 20kHz, one channel loaded
Peak :
Power :
82 Volts
X-150
105 Watts one channel into 8 Ohms (20dBW),
141 Watts one channel into 4 Ohms
50 Amps
80
Peak-to-peak output current :
Damping factor :
Output devices per channel :
Pre-output impedance :
DUAL MONO INTEGRATED AMPLIFIER
4
50 Ohms
Line inputs :
Total harmonic distortion + noise :
Signal / noise ratio :
< 0.01% 20Hz to 20kHz
> 98dB ‘A’-weighted
Input sensitivity for 105Watts, 8 Ohms : 250mV
Input impedance :
Overload margin :
Channel separation :
220k Ohms
26dB
> 70dB typical
Frequency response :
20Hz to 20kHz, + 0, - 0.2dB
25
20
Phono input :
15
10
5
Frequency response reference
IEC RIAA - see graph . . .
IEC
RIAA
FREQUENCY (Hz)
dB
0
-5 10 16 25 40 63 100 160 250 400 630 1.25K 2K 3.15K 5K 8K 12.5K 20K
-10
-15
-20
-25
INSTRUCTIONS FOR USE
Signal / noise ratio :
> 94dB ‘A’-weighted
Input sensitivity :
Input impedance :
Overload margin :
2.5mV Moving Magnet
47k Ohms
24dB
Thank you for purchasing the Musical Fidelity
X-150 Integrated amplifier.
Input facilities :
3 pairs line level RCA connectors,
1 pair phono RCA connectors
Used properly and carefully, it should give you many years of
outstanding musical reproduction.
Output facilities :
2 amplifier channels via 1 pair per channel binding posts.
1 pair RCA audio outputs controlled by the volume,
1 pair RCA tape record fixed line level output.
Aesthetically, the X-150 Integrated amplifier is a
perfect match for the X-RAY Version 3 CD player.
Together, they form one of the finest hi-fi systems available.
Power requirement :
Dimensions :
100 / 115 / 230Volts AC 50 / 60Hz (factory pre-set),
320 Watts maximum into 8 Ohms, 32 Watts idle
218mm, 8.6 inches wide
98mm, 3.8 inches high (including feet)
377mm, 14.9 inches deep
Dust regularly with a soft cloth or soft brush, but be careful when
using cleaning or polishing agents - they may harm the surface finish.
(including knob and rear terminals)
Weight :
6.5 kg, 14.3 lbs unit only, unboxed
8 kg, 17.7 lbs in shipping carton
If you have any questions about your audio system,
please consult your dealer who is there to help and advise.
Standard accessories :
IEC type mains lead (10-Amp), remote control,
2 batteries size LR03 or AAA, manganese alkaline type
Musical Fidelity reserves the right to make improvements which
may result in specification or feature changes without notice.
X-150 Integrated Amplifier
Page 8 of 8
X-150 Integrated Amplifier
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Issue 4 May 2004
CONNECTIONS
GENERAL ADVICE
INSTALLATION PRECAUTIONS and USER INFORMATION
All input, output and power connections
should be made with the mains power
switched OFF.
OUTPUT CONNECTIONS
Your new X-150 Integrated amplifier is designed and built to provide trouble-free performance,
but as with all electronic devices it is necessary to observe a few precautions:
Connect your loudspeakers to the pairs of
terminals on the back panel marked as
LEFT and RIGHT SPEAKER outputs.
Note: the combined load impedance
must not be less than 4 ohms.
Heed all warnings shown on the back of the product.
INPUT CONNECTIONS
Only connect the X-150 Integrated amplifier to a mains outlet having the same voltage as marked
at the back of the unit.
The X-150 Integrated amplifier has a pair
of RCA inputs on the rear panel marked
PHONO which are intended for moving
magnet (MM) pickups.
Always ensure that when disconnecting and reconnecting your audio equipment the mains
supply is switched off.
PRE-AMPLIFIER OUTPUT
The X-150 amplifier has its pre-amplifier
output available from RCA sockets on
the back panel marked PRE-OUT, and is
controlled by the volume adjustment.
Position the mains lead and signal interconnects where they are not likely to be walked on or
trapped by items placed on them.
Some turntable/pickup arm combinations
are fitted with an extra wire for chassis
earthing. This should be connected to the
earth terminal on the back panel.
Do not use near water, or place water-filled containers on the amplifier, for example, flower
vases or potted plants. If water does spill inside, immediately pull out the mains plug from the
wall socket and inform your dealer, who should then check the unit before further use.
Entry of liquid into the amplifier is dangerous, and may cause electric shock or fire hazard.
This is to allow “bi-amplification” using
suitable external amplifiers and crossover
networks to power the speaker drive
components separately, giving noticeable
improvement in clarity, imaging and bass
weight.
The X-150 also has three “line level”
inputs controlled by the internal volume
setting. They all have the same input
sensitivity, and are therefore suitable for
use with any source component having an
output of at least 300mV. The three pairs
of sockets on the rear panel are marked
INPUT 2, 3 and 4 corresponding with
the blue function indicator LEDs on the
front panel.
Do not place the unit near heat sources such as radiators, direct sunlight or other equipment.
The case of this amplifier can run at high temperatures - operate the unit in a well ventilated
area, and do not touch the cabinet sides or top after periods of use at high output power.
Do not remove covers or try to gain access to the inside. There are no internal user adjustments.
Refer all service work to an authorised Musical Fidelity agent.
NOTE: Unauthorised opening of the equipment will invalidate any warranty claims.
In this arrangement, typically the X-150’s
speaker outputs are used to drive the
speaker’s “tweeter” (high audio frequen-
cies), and an external stereo amplifier
drives the “woofer” (low frequencies).
The X-150’s PRE OUT RCA sockets
would therefore be connected to the input
of the external “woofer” amplifier in this
example.
There are fuses inside the X-150 amplifier. In the unlikely event that one blows, refer the unit to
your audio dealer. Do NOT try to replace the fuses yourself as this will invalidate the warranty.
Connect the left and right outputs from
your audio components to each of the
three sets of RCA sockets, to suit your
own order of preference.
Dust regularly with a soft cloth or soft brush, but be careful when using cleaning or polishing
agents - they may harm the surface finish.
The electronics in modern hi-fi equipment is complex and may, therefore, be adversely affected
or damaged by lightning. For protection of your audio system during electrical storms, remove
the mains plugs and disconnect any aerial lead.
Connect the the X-150’s TAPE RECord
output sockets to the line input sockets of
your tape deck.
If you are in doubt about bi-amplifica-
tion, please contact your dealer for
advice.
If after-sales service is required, to help your dealer identify the X-150 Integrated amplifier
please quote the serial number located on the rear panel of the unit.
RADIO FREQUENCY INTERFERENCE (R.F.I)
This product has been tested to ensure that its operation is not adversely affected by normal back-
ground levels of R.F.I., and that it does not itself generate excessive amounts of interference.
However, if a problem persists, please contact your Musical Fidelity agent.
X-150 Integrated Amplifier
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X-150 Integrated Amplifier
Page 3 of 8
Issue 4 May 2004
CONNECTIONS & FACILITIES
REMOTE CONTROL
REMOTE CONTROL
Buttons on the remote control with blue-grey surround enable main functions of the ampli-
fier to be operated from a convenient distance. Remaining buttons on this universal hand-
set are for use with other Musical Fidelity products, and have no effect on the X-150
Integrated amplifier.
As the remote control uses an invisible infra-red light beam, the transmitter must be pointed
directly towards the receiver window on the front of the amplifier, without visual obstruc-
tion between them.
Pressing button numbers 1, 2, 3 or 4 selects a corresponding amplifier input.
1
2
3
4
5
6
7
8
Pressing the MUTE button mutes the SPEAKER output and PRE-OUT sockets, but has no
effect on the TAPE OUT sockets for recording. To show that the amplifier is muted, the
red LED on the front panel lights. Press the MUTE button again to cancel mute function,
and the red LED will go out.
Front panel layout
1
POWER-on indicator LED (blue)
POWER on/off switch
Audio MUTE indicator LED (red)
Volume control
Infra Red Receiver for
remote control
Input select button - up
Input indicator LEDs (blue)
Input select button - down
Back panel layout
2
3
4
5
Pressing the volume-up or -down buttons on the remote handset will advance the motorised
volume control in the required direction. This action also cancels the mute function.
9
PHONO input sockets (input 1)
10 Line level INPUT sockets, 2 to 4
11 TAPE RECord output sockets
12 PRE-amplifier OUTput sockets
13 IEC mains power inlet
14 RIGHT SPEAKER OUTPUT
terminals
If the range of the remote control greatly decreases, replace the batteries with new ones.
Do not mix old and new batteries - two are required, size LR03 or AAA, manganese alka-
line type. Do not dispose of used batteries in a fire.
6
7
8
15 LEFT SPEAKER OUTPUT terminals
9
10
11 12
13
Input selection buttons,
1 to 4
VOLUME (UP)
50/60Hz
CAUTION
MOUNT UNIT
ON SOLID SURFACE.
DO NOT REMOVE
POWER
CONSUMPTION
SCREWS OR COVERS
UNDER ANY
CIRCUMSTANCES.
VOLUME (DOWN)
320
W
NO USER SERVICEABLE
COMPONENTS INSIDE.
REFER SERVICING TO
QUALIFIED ENGINEER.
SEE OWNERS MANUAL
FOR FURTHER INFORMATION.
SERIAL
NUMBER
X-150
Audio MUTE button
STEREO INTEGRATED AMPLIFIER
RIGHT SPEAKER OUTPUT
DESIGNED IN ENGLAND BY MUSICAL FIDELITY
LEFT SPEAKER OUTPUT
BUILT IN TAIWAN
15
14
X-150 Integrated Amplifier
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X-150 Integrated Amplifier
Page 5 of 8
Issue 4 May 2004
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