Musical Fidelity Stereo Amplifier X 150 User Manual

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  
Page 1 of 8  
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  
Page 6 of 8  
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  
Page 4 of 8  
X-150 Integrated Amplifier  
Page 5 of 8  
Issue 4 May 2004  
 

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