Musical Fidelity KW250S Stereo Amplifier Manual: Connection Guide

KW250S

AMPLIFIER CONNECTIONS

All input, output and power connections should be made with the mains power switched OFF.

INPUT CONNECTIONS

Phono: The KW250S has a pair of RCA type phono input sockets intended for use with moving magnet

(MM)or moving coil (MC) pickups. Some turntable/pickup arm combinations are fitted with an extra wire for chassis earth. This should be connected to the earth terminal on the back panel.

Line level inputs: The unit also has two stereo pairs of RCA “line level” input sockets controlled by the internal volume setting.

They both have the same input sensitivity, and are therefore suitable for use with any source component having a line output of 300mV nominal. The two sockets on the rear panel are marked, AUX1, AUX2/PDI, corresponding with function selector buttons on the front panel. The AUX2/PDI input sockets on the back share the same input as the PDI input jack at the front.

Do not connect devices to both sides of the AUX2 input simultaneously. Please see note P.20 Digital inputs: Digital sources are catered for on the AUX1, AUX 2 inputs. Unit automatically switches AUX1 input to digital source type (coax/optical) on insertion of a lead with digital signal present.

OUTPUT CONNECTIONS

Speakers: Connect your loudspeakers to the terminals on the back panel marked as LEFT and RIGHT SPEAKER outputs. Make sure both speakers are connected with the same polarity.

PRE-: The KW250S has its pre-amplifier output available from RCA sockets on the back panel marked PRE-OUT, and is controlled by the volume adjustment.

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. In this arrangement, typically the KW250S speaker outputs may be used to drive the speaker’s “tweeter” (high audio frequencies), and an external higher power stereo amplifier(s) could drive the “woofer” (low frequencies).

The KW250S’s PRE OUT RCA sockets would therefore be connected to the input of the external “woofer” amplifier in this example.

If you are in doubt about bi-amplification, please contact your dealer for advice.

TAPE OUT: The KW250S has a single tape output with facilities for recording material to a suitable line- level recorder such as tape, CD-R/RW, minidisk etc. The tape deck's line inputs are connected to the units’ TAPE OUT sockets to record the material being listened to. The line outs should be connected to the unused of the AUX inputs

Issue 2: 19th June 2006	Page 18 of 24

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.