KW250S

GENERAL INSTALLATION

INTRODUCTION

Congratulations on the purchase of your new KW250S integrated CD/DAB/FM/PRE and dual mono power amp.

The KW250S is one of the most comprehensive fully integrated Hi-Fi designs ever made, and, encloses the best elements out of all our separates into one convenient box.

The CD player has extremely low jitter, vanishingly low distortion, exemplary linearity and ultra low noise. The tuner is designed to bring DAB into the realms of hi-fidelity sound reproduction to complement the very latest technology DAB/FM receiver circuit. Great attention has been paid to internal layout, isolating each circuit section to prevent possible interaction.

The CD, DAB and FM digital data streams are first up- sampled to 192kHz, which moves noise, jitter and distortion artefacts well above the audio band. They are then passed through a new, low noise, low distortion 24-bit dual- differential digital-to-analogue converter, which allows simpler filtering of the analogue output. This in turn gives an improved audio response without the need for sharp filters that degrade sound quality. The result is a CD player and DAB/FM tuner which has a smoother response than previously possible with none of the “hardness” of other units. The preamplifier sections are our finely tuned and tweaked tube input line level preamplifier for smooth tube sound coupled with low noise and virtually no distortion. This also includes our top quality low noise phono stage which caters for both MM and MC cartridge users.

The power amplifier consists of two mono block amplifier modules with completely separate supplies for the absolute best in separation and imaging. Rated for 250W nominal they are enough to drive even the most demanding loudspeakers with ease. Low distortion and very quiet they will deliver all music types exactly as the artist originally intended!

The resultant performance achieved by this unit is among the best in the world. It has excellent signal to noise ratio, low distortion, wide bandwidth, huge dynamic range, extraordinary resolution and fine detail.

INSTALLATION

Position the KW250S on a stable, horizontal surface where there is no risk of it being knocked, or subjected to vibration such as from loudspeakers.

Protect your KW250S from humidity - if the unit is moved from a cold place to a warm room, or in generally humid conditions, moisture can form on the pickup lens inside the player, preventing the laser beam from reading the disc. If this happens, remove the CD, close the disc drawer, and leave the unit switched on for an hour or so to allow sufficient time for the moisture to evaporate.

AERIAL (ANTENNA)

For ease of installation, a tri-band aerial is supplied with the unit. This covers the FM, DAB II, III and L-bands and picks up sufficient signal for most domestic purposes. However, if FM stereo background noise is obtrusive, radio text is corrupted or DAB cut-out is experienced, or unit is to be used in a fringe area, a rooftop DAB and FM aerial may be required. Please contact an approved aerial contractor with good local knowledge.

The tri-band aerial is plugged into the tri-band antenna F connector at the rear of the unit, and should be securely fastened by tightening the nut.

AUDIO CONNECTIONS

Outputs: Connect your loudspeakers to the terminals on the back panel marked as LEFT and RIGHT SPEAKER outputs.

Preamp outputs phono sockets are controlled by the volume and source controls. This allows connection of a second amplifier for bi-amping or increased drive.

Tape outputs of nominal line level and are constant volume for recording to tape, CD-R/RW, or any other recordable format.

If desired, the unit can also be attached to an external DAC of your choice. The unit outputs COAX and OPTICAL digital signal stream at 48kHz.

NOTE: The digital output works for CD, DAB and FM.

Inputs: The KW250S has three line level inputs and a Phono MM/MC input. PHONO MM/MC, AUX1 and AUX2 are available at the back for other signal sources.

A Portable Device Input (PDI) 3.5mm stereo jack is provided at the front which is shared with the AUX1 rear inputs. This allows easy connection of a portable player.

Two digital inputs AUX 1 (optical and coax.), AUX 2 (coax only), cater for digital sources that would benefit from the KW250S‘s up to date DAC circuits. Use these inputs for better quality from mini disc, DAT or MP3, for enhanced sound quality.

NOTES ON USING COMPACT DISCS

Always hold discs by the edges and make sure they remain clean - do not touch the surface. Keep discs away from direct sunlight and heat sources, such as radiators. Clean discs with a cloth before playing them, but do not use solvents such as benzene, thinners, or antistatic spray intended for analogue records.

After playing, always return the disc to its case for storage.

CLEANING

Before cleaning the unit, switch off power at the mains switch and remove the mains plug from the wall socket. Clean the cabinet and remote control unit using a moist cloth. We do not advise using solvents, white spirit or thinners as they could damage the surface finish.

Issue 2: 19th June 2006

Page 7 of 24

 

 

Page 6 Page 8
Page 7
Image 7
Musical Fidelity KW250S manual Introduction, Installation, Aerial Antenna, Audio Connections, Cleaning
Page 6 Page 8

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.
Top Page Image Contents