Unleash the full potential of your hi-fi setup with the Musical Fidelity M5si Integrated Amplifier, a powerhouse designed for audiophiles who demand exceptional sound quality and versatility. Delivering 150 watts per channel with high current output, this amplifier effortlessly drives virtually any loudspeaker, making it the perfect centrepiece for your home stereo system. Inspired by Musical Fidelity’s legendary Nu-Vista 800, the Musical Fidelity M5si Integrated Amplifier offers a sweet, lucid sound with a deep, wide soundstage that brings your music to life with stunning clarity.

The Musical Fidelity M5si Integrated Amplifier is a true high-end performer, blending robust power with refined audio engineering. Its internal dual-mono configuration—featuring two independent monoblocs and a separate preamp on a single PCB—ensures outstanding channel separation and technical performance comparable to the acclaimed M6si. With a frequency response of +0, –0.1dB from 10Hz to 20kHz, distortion below 0.010%, and a signal-to-noise ratio exceeding 100dB, the M5si delivers a crystalline top end, extended bass, and a noise-free listening experience. It offers a wide range of inputs, including an MM phono stage, 4x RCA line inputs, and a USB-B input supporting up to 24-bit/96kHz, making it a versatile hub for your hi-fi audio system. Drawing inspiration from the Nu-Vista 800, the M5si incorporates subtle PCB layout solutions that enhance its sound quality, resulting in a deep, wide stereo image without a trace of harshness.

For hi-fi enthusiasts, the Musical Fidelity M5si Integrated Amplifier is a gateway to exceptional audio performance. Its 150 watts per channel ensures unconditional stability, allowing it to drive even the most demanding loudspeakers with ease, making it a perfect match for any good sound system. The built-in MM phono stage lets you connect your turntable directly, delivering rich, detailed vinyl playback with RIAA/IEC accuracy within ±0.5dB. Whether you’re streaming digital audio via USB, spinning records, or playing from a CD player, the M5si produces a sweet, clear sound with a spacious soundstage that immerses you in every track. Its preamp output and trigger options add flexibility, allowing you to expand your setup with additional components. With the M5si, you’ll experience music as it was meant to be heard—full of depth, clarity, and warmth.

Technical Specifications

• Power Output: 150 watts per channel into 8 ohms
• Total Harmonic Distortion (THD): <0.010% (20Hz–20kHz)
• Signal-to-Noise Ratio: >100dB (‘A’-weighted)
• Frequency Response: +0, –0.1dB (10Hz–20kHz)
• Inputs: 4x RCA line level, 1x MM phono (3mV nominal, 50k ohms impedance), 1x USB-B (up to 24-bit/96kHz), 1x trigger in
• Outputs: 1x RCA fixed line level, 1x RCA variable preamp, 1x trigger out
• Phono Stage: >70dB signal-to-noise ratio (‘A’-weighted), RIAA/IEC ±0.5dB (20Hz–20kHz)
• Dimensions: 440 mm (W) x 100 mm (H) x 405 mm (D)
• Weight: 14.6 kg (unpacked)

Since 1978, Len Wallis Audio has been a trusted name in hi-fi stores, dedicated to delivering exceptional audio solutions to enthusiasts and casual listeners alike. With over four decades of expertise, we pride ourselves on curating the finest hi-fi audio equipment, ensuring you experience sound as it was meant to be heard. At Len Wallis Audio, we’re not just about selling products—we’re about creating unforgettable listening experiences.

Don’t miss the chance to power your hi-fi setup with the Musical Fidelity M5si Integrated Amplifier, a perfect addition to any hi-fi stereo sound system. Ready to experience high-end audio with unmatched clarity and power? Contact our expert team at Len Wallis Audio today for personalised advice and to arrange a demonstration. Let us help you build the hi-fi audio system of your dreams with the Musical Fidelity M5si Integrated Amplifier—your ears will thank you!