Musical Fidelity KW250S manual Amplifier Operation, Starting

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KW250S

AMPLIFIER OPERATION

STARTING . . . .

Once all connections are made, switch on the unit, using the POWER button to the bottom left of the front panel, the front panel of the KW250S- the blue display will

KW250S v1.0

light indicating that the unit is on. The feet glow red to indicate speaker outputs are muted, for about fifteen seconds, so no sound will be heard from your speakers. Once the 15 seconds is up, the feet glow orange to indicate unit is usable, but still warming up. At this stage sound output is now available. After 30 minutes, the feet glow blue to indicate unit is fully warmed up.

VOLUME

The volume control knob, to the right of the front panel, should be adjusted for normal listening levels.

KW250S v1.0

Whilst being adjusted, the volume setting is shown in the display window. The settings range from 0 to 100 in 1dB resolution steps giving about +19db out from the preamp outputs at 100 setting.

Note: to prevent damage to hearing and speakers, the switch-on volume setting is limited to 50 maximum. Please readjust setting after switch on if necessary

PHONO INPUT

To use the phono input, connect your turntable cartridge outputs to the phono input sockets (see p.8). Pressing the phono button selects the corresponding input.

PHONO MM

Pressing a second time alternates the input for moving magnet (MM) or moving coil (MC)

PHONO MC

Choose the input that best describes the cartridge type being used.

You can also select the Phono input by using the remote handset, (see p. 9) but MM/MC switching is not available on the remote.

CD

Selects the internal CD player. Please refer to p.10 for advice and player functions.

TUNER

Selects the internal tuner. Please refer to p.14 for advice and tuner functions.

AUX 1

To use the AUX1 input, connect your external source to the AUX1 input (see p.8). Pressing the AUX1 button selects the corresponding input. On AUX1 you have the option of analogue line level,

AUX1 ANALOG

or digital optical/coax inputs.

AUX1 OPTICAL

The unit switches automatically to digital inputs and selects the correct one when a digital signal is present.

AUX1 COAXIAL

For sources with digital outputs, we recommend you use the KW250S digital inputs to take advantage of the up- sampling technology.

AUX 2

To use the AUX2 input, connect your external source to the AUX2 input (see p.8).

Pressing the AUX2 button selects the corresponding input. On AUX 2, you have the option of analogue line level (rear phono plugs or front 3.5mm jack PDI input),

AUX2 ANALOG

or digital coax input.

AUX2 COAXIAL

The unit switches automatically to digital input for AUX2 when a digital signal is present.

For sources with digital outputs, we recommend you use the KW250S digital inputs to take advantage of the up- sampling technology.

The AUX 2/PDI input is also available at the front of the unit in the form of a 3½ mm jack PDI (Portable Device Input) socket to enable personal/portable devices such as MP3 players and minidisk walkman to be played thorough the unit.

TIP: For best listening experience using your portable device, we recommend you set its outputs for “line level”

Issue 2: 19th June 2006

Page 19 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 InstallationAerial Antenna InstallationCleaning IntroductionFacilities and Connection KW250SAmplifier Buttons Remote ControlCD Basic Operation CD Special Features 041 Problem Probable Cause Remedy CD PROBLEMS?DAB Function Buttons Preset UP and Preset DownMONO/STEREOremote only Menu DAB options InfoMenu FM options Audio modeFM Function Buttons MONO/STEREO remote onlyProblem Probable Cause Remedy Tuner PROBLEMS?Aerial 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.