Musical Fidelity KW250S manual Amplifier PROBLEMS?, Problem Probable Cause Remedy

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KW250S

AMPLIFIER PROBLEMS?

Basic problem-solving with an amplifier is similar to troubleshooting other electrical or electronic equipment. Always check the most obvious possible causes first, such as the following examples:

Problem

Probable Cause

Remedy

 

 

 

No power when POWER button is

Mains power plug is not fully inserted

Plug in securely

pressed

into rear socket

 

 

 

 

No sound

Mute function is still active

Press the MUTE button on the

 

Wrong connections between input

remote control to cancel

 

sources and the unit

Check audio input lead connections

 

Speakers not connected, or

Check speaker cables

 

incorrectly wired

 

 

Devices connected to both AUX2 rear

Remove one of the devices

 

connector and PDI front panel input

 

 

simultaneously

 

 

 

 

Sound is not precise, lacking in bass

Speakers are connected out of phase,

Ensure speakers are connected

and stereo image

i.e., connections to one speaker (+

correctly

 

and -) are reversed

 

 

 

 

Hum

Audio connector plug not fully

Insert plug securely

 

pushed in

 

 

 

 

Remote control does not work

Amplifier’s POWER switch is set to

Set switch to on

 

off

Insert batteries correctly

 

One or more batteries fitted the wrong

Change batteries for a new set

 

way round

Ensure there is no obstruction

 

Batteries are flat

 

between the remote control and

 

Remote control is not pointed directly

amplifier front

 

towards the front panel of the

 

 

amplifier

 

 

 

 

Remote control range has greatly

Batteries are running out

Change batteries for a new set.

reduced

 

 

 

 

 

If none of these actions affect a cure, please contact your dealer, or an authorised Musical Fidelity service agent. Remember; never open the case of the KW250S yourself, as this will invalidate the guarantee.

Issue 2: 19th June 2006

Page 21 of 24

 

 

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Contents KW250S KW250S ContentsIMPORTANT! U.K. only Safety InformationClass 1 Laser Product Radio Frequency Interference RFI Laser InformationInstallation Precautions and User Information General InstallationCleaning InstallationIntroduction Aerial AntennaFacilities and Connection KW250SAmplifier Buttons Remote ControlCD Basic Operation CD Special Features 041 Problem Probable Cause Remedy CD PROBLEMS?Preset UP and Preset Down DAB Function ButtonsMONO/STEREOremote only Menu DAB options InfoFM Function Buttons Audio modeMONO/STEREO remote only Menu FM optionsTuner PROBLEMS? Problem Probable Cause RemedyAerial Antenna Input Connections Amplifier ConnectionsStarting Amplifier OperationRecording Amplifier PROBLEMS? DAC CD, DAC & Tuner SpecificationsPhono Response Amplifier SpecificationsManual Revision

KW250S specifications

The Musical Fidelity KW250S is a high-performance integrated amplifier that has garnered attention for its exceptional sound quality and innovative technologies. Designed for audiophiles who demand the best, the KW250S stands out in a crowded market due to its meticulous engineering and attention to detail.

At the heart of the KW250S is a robust Class A/B amplification design, which provides an impressive power output of 250 watts per channel into 8 ohms, ensuring that it can drive a wide range of speakers with ease. This substantial power allows music to be reproduced with clarity and richness, making it suitable for both delicate acoustic pieces and demanding orchestral works.

One of the main features of the KW250S is its sophisticated preamplifier stage. Musical Fidelity has implemented a dual-mono configuration that separates the left and right channels, minimizing crosstalk and enhancing stereo imaging. This design choice contributes to the amplifier's ability to deliver a three-dimensional soundstage, allowing listeners to appreciate the spatial qualities of their music.

The KW250S also employs a high-quality phono stage that supports both moving magnet and moving coil cartridges, catering to vinyl enthusiasts who seek the true essence of analog sound. The integrated DAC section accepts various digital sources, making it versatile for modern listening environments. With multiple digital inputs including USB, optical, and coaxial, users can connect their computers, CD players, and other digital devices seamlessly.

In terms of build quality, the KW250S is as impressive as its performance. It features a solid aluminum chassis that not only adds to its aesthetic appeal but also helps minimize resonance and electromagnetic interference. The spacious internal layout allows for optimal cooling, enhancing reliability during extended listening sessions.

User-friendliness is another key aspect of the KW250S. The front panel hosts a large, informative display and easy-to-use controls that make selecting inputs and adjusting settings straightforward. Furthermore, the KW250S comes with a remote control, adding convenience for users who prefer to manage their listening experience from a distance.

In summary, the Musical Fidelity KW250S combines powerful amplification, advanced technology, and superb build quality into a single integrated amplifier. Its rich feature set and outstanding performance make it a compelling choice for audiophiles seeking to elevate their music listening experience. Whether it's through analog or digital sources, the KW250S is engineered to deliver an unparalleled musical experience that will resonate with listeners for years to come.