Musical Fidelity KW250S manual Amplifier Specifications, Phono Response

Page 23

KW250S

AMPLIFIER SPECIFICATIONS

Output:

Power

250 Watts per channel into 8 Ohms (24dBW),

 

 

400 Watts per channel into 4 Ohms

 

Voltage, RMS

45 Volts 20Hz to 20 kHz

 

Voltage, Peak-to-peak

127.3 Volts

 

Current peak-to-peak

75 Amps

 

Damping factor

140

 

Output devices per channel

4

 

Pre-out impedance

50 Ohms

Line inputs:

THD + noise, 20Hz to 20 kHz

< 0.01%

 

 

Signal / noise ratio

> 100dB ‘A’-weighted

 

Input sensitivity for 250 Watts

330mV

 

Input impedance

220k Ohms

 

Overload margin

26dB

 

Channel separation

> 70dB typical

 

Frequency response

20Hz to 20 kHz, +0, -0.2dB

Phono input:

RIAA/IEC combined response (see graph)

 

20.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.0

 

 

 

 

 

 

 

 

PHONO RESPONSE

 

5.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

dB

0.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-5.0

 

 

RIAA

 

 

 

 

 

 

 

 

 

 

 

 

PHONO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-10.0

 

 

RIAA/IEC

 

 

 

 

 

 

 

 

 

 

-15.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-20.0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20.0

31.5

50.0

80.0

125

200

315

500

1000

1600

2500

4000

6300

10000 16000

Frequency (Hz)

 

Signal / noise ratio

> 96dB ‘A’-weighted

 

Input sensitivity

2.5mV (moving magnet)

 

Input impedance

47k Ohms

 

Overload margin

24dB

Connections:

Aerial input

1 F-type (female) with securing thread, DAB/FM

 

 

Digital inputs

1 optical (TOSLINK)

 

 

 

2 S/PDIF (RCA connector),

 

Digital outputs

1 optical (Toslink), 44.1/48 kHz

 

 

 

1 S/PDIF (RCA connector), 48 kHz

 

Line level inputs:

2 pairs line level RCA connectors,

 

 

 

1 front panel 3.5mm jack socket (sharing AUX2 input)

 

 

 

1 pair phono (MM/MC) RCA connectors,

 

Line level outputs:

1 pair RCA [preamp] controlled by the volume,

 

 

 

1 pair RCA [tape record] fixed line level output.

 

Speaker outputs:

1 pair 4mm banana plug/binding posts per channel.

 

Power requirement:

100 / 115 / 230Volts AC 50 / 60Hz (factory pre-set),

 

 

 

700 Watts maximum into 8 Ohms, 80 Watts idle

Weight:

29.5 kg,

65 lbs

unit only, unboxed

 

37.0 kg,

81.5 lbs

in shipping carton

Dimensions:

485 mm,

19.1 inches wide

 

 

170 mm,

6.7 inches high including feet

 

470 mm, 18. 5 inches deep including terminals

Standard accessories:

 

Telescopic tri-band aerial with F-plug connector,

 

 

 

IEC type mains lead (16-Amp type),

 

 

 

Remote control (A5, universal type),

 

 

 

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.

Issue 2: 19th June 2006

Page 23 of 24

 

 

Image 23
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?MONO/STEREOremote only Preset UP and Preset DownDAB Function Buttons Menu DAB options InfoMenu FM options Audio modeFM Function Buttons MONO/STEREO remote onlyAerial Antenna Tuner PROBLEMS?Problem Probable Cause Remedy 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.