Musical Fidelity KW250S Integrated System

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 upsampled 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.

<b>CD</b><br>
Disc Mechanism: Philips<br>
Total Correlated Jitter: < 135 pS<br>
<b>DAC</b><br>
DAC Circuits: 24 bit Delta-Sigma (Bit stream) dual differential 8x over sampling<br>
Upsampling: 192 kHz<br>
Total correlated jitter: < 135 pS<br>
Linearity: < 0.1 dB down to -96 dB<br>
Output Digital 0dB Level: 2.15 VRMS at 1 kHz nominal<br>
Analogue Output Impedance: 47 Ohms<br>
Frequency Response: 10 Hz to 20 kHz -0.2 dB max<br>
Channel Separation: > 105 dB 20 Hz to 20 kHz<br>
Signal / Noise Ratio: > 113 dB “A” weighted<br>
Total Harmonic Distortion: < 0.003% 10 Hz to 20 kHz<br>
<b>TUNER</b><br>
Supported DAB Modes: I, II, III, and IV VHF 174 240 MHz RF frequency range; L-Band (standard) 1452 1492 MHz<br>
VHF Sensitivity: -96 -97 dBm<br>
L-Band Sensitivity: -95 -96.5 dBm<br>
L-band After Error Correction: -15 dBm Maximum Input Signal for Pseudo channel BER with real value 0.02<br>
Band III After Error Correction: 0 dBm<br>
Adjacent Channel Selectivity: 32 33 dBm<br>
Far-off selectivity: 48 dBm<br>
Acquisition sensitivity: 101 dBm
Input Impedance: 50 Ω F type connector (to VHF/L-Band diplexer)<br>
FM Specifications:<br>
RF Frequency Range: 87.5-108 MHz<br>
RF Sensitivity (S+N)/N = 26 dB, 90 MHz @ 22.5 kHz: 5 µV Dev. F.mod = 1 kHz<br>
RF Limiting Sensitivity: 0.5 µV<br>
(S+N)/N Ultimate S/N Ratio: 63 dB (90 MHz @ 200 mV/22.5 kHz Dev. F.mod = 1 kHz) <br>
THD: 0.5% (90 MHz @ 200 mV/75 kHz Dev. F.mod = 1 kHz) <br>
Stereo Channel Separation: 30 dB<br>
Output:<br>
Power: 250 Watts per channel into 8 Ohms; 400 Watts per channel into 4 Ohms<br>
Voltage, RMS: 45 Volts 20 Hz to 20 kHz<br>
Voltage, Peak-to-Peak: 127.3 Volts<br>
Current Peak-to-Peak: 75 Amps<br>
Damping Factor: 140<br>
Output Devices Per Channel: 4<br>
Pre-Out Impedance: 50 Ohms<br>
Line Inputs:<br>
THD + Noise, 20 Hz to 20 kHz: < 0.01%<br>
Signal / Noise Ratio: > 100 dB ‘A’-weighted<br>
Input Sensitivity for 250 Watts: 330 mV
Input Impedance: 220 kOhms<br>
Overload Margin: 26 dB<br>
Channel Separation: > 70 dB typical<br>
Frequency Response: 20 Hz to 20 kHz, + 0, - 0.2 dB<br>
Phono Input:<br>
Signal / Noise Ratio: > 96 dB ‘A’-weighted<br>
Input Sensitivity: 2.5 mV (moving magnet)<br>
Input Impedance: 47 kOhms<br>
Overload Margin: 24 dB<br>
Power requirement: 100 / 115 / 230 Volts AC 50 / 60Hz; 700 Watts maximum into 8 Ohms, 80 Watts idle<br>
Dimensions: 485 (W) x 470 (D) x 170 (H) mm<br>
Weight: 29.5 kg<br>

Turnaround

Orders will usually dispatched within 2 working days of receiving cleared payment.

Shipping Rates

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Carriers

We despatch the bulk of our UK mainland items on a 24 hour service.  Non-Mainland locations – Isle of Man, Isle of Wight, the Scilly Isles, the Scottish highlands and Islands, the Channel Islands and Northern Ireland may take a day or so longer. Smaller items are delivered using Royal Mail 24 or special delivery. Larger items are delivered using a courier service such as UPS and occasionally by a Pallet service.

Order Tracking

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