Magnat MR 750 includes: an integrated amplifier with a tube pre-amplifier, a phono preamplifier, a DAC with HDMI ARC and SPDIF inputs, an FM/DAB tuner, a Bluetooth receiver version 5.0 with aptX, a headphone amplifier and even a three-band equalizer. The heart and fiery motor of Magnat MR 750 are two dual ECC81 triodes operating in the pre-amplifier stage. Before and after are solid transistors and digital circuits, but it is the pre-amplifier that determines the sound character of the device.
After the tubes, a transistor output stage on discrete elements is organized, giving out 100 W per channel at a load of 4 Ohms. The Magnat MR 750 amplifier is powered by a powerful toroidal transformer, which has a shield to eliminate the negative impact on the stereo receiver circuits. Before the preliminary stage, the path can be both analog and digital. The built-in phono corrector works with MM-type heads, has a rumble filter and is organized on an operational amplifier. SPDIF inputs are served by one of the best, in my opinion, modern digital receivers AKM AK4113.
The section of the board after the digital receivers is assembled on the already familiar WM8740 and NE5532 microcircuits, i.e. it is completely analogous to the DAC and analog output circuit of the CD player. This allows us to make a simple and obvious conclusion: when connecting these components, you need to puzzle over finding a high-quality analog interconnect cable, SPDIF will be equivalent in quality at best, but only under very good circumstances. If you do not like bright displays or you hear their negative impact on the sound on each component, then know that there is a special button for controlling the display brightness (it also turns it off if necessary).
The Magnat MR 750 receiver has a “Mono” button. This is useful not only when using the FM tuner in conditions of weak signal reception, but also when listening to early stereo recordings, in which sound engineers diligently “shove” the musicians into different speakers and, in my opinion, did not think at all how this would be perceived during playback. I would prefer to have such a button on all devices on which I listen to old recordings. Balance adjustment and a three-band equalizer are the dream of a hi-fi fan of the last century. Perfectionists, of course, will immediately feel the Direct button just above and use it.
Specifications of Magnat MR 750
Nominal power: 2×100 W at 4 Ohm, 2×75 W at 8 Ohm
Frequency range: 6-90000 Hz (-3 dB), 20-20000 Hz (± 0.3 dB)
Subsonic filter: 16 Hz, 18 dB per octave
Signal-to-noise ratio: less than 104 dB on all inputs except phono preamplifier (82 dB)
Tuner: FM/DAB/DAB+ Preamplifier tubes: ECC81 or 12AT7
Digital inputs: 1 x Toslink, 1 x Coax, 1 HDMI ARC
Sampling frequencies: 44.1/48/88.2/96/176.4/192 kHz
Bit depth: 16/24 bit
Bluetooth: 5.0 Qualcomm aptX HD, 2402 – 2480 MHz
Dimensions: 433 x 116 x 316 mm
Weight: 7.4 kg.
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Share your thoughts, listening impressions or product experience.
I am seriously thinking of buying the Magnat MR 750 but I am not sure if the combination of it with my old Marantz DMS 150 speakers could work satisfactorily.
I hope someone can answer. Have a nice evening.
EGP, Sweden
the combination of the Magnat MR 750 and your vintage Marantz DMS 150 speakers will work very satisfactorily together.The electronic and acoustic specifications of both components are highly compatible. The hybrid nature of the amplifier balances the unique driver configuration of your classic speakers well.⚡ Electrical and Power MatchingThe amplifier provides an ideal power delivery profile for these specific speakers without risking damage or clipping under normal listening conditions:Impedance Alignment:Marantz DMS 150 speakers carry a nominal impedance of 8 Ohms. The Magnat MR 750 is rated to comfortably deliver 2 x 50 Watts RMS at 8 Ohms. This represents a stable electrical load that won't stress the amplifier's Class A/B discrete output stage.Power Handling: The DMS 150 speakers are rated for 100 Watts of music/peak power. The Magnat’s 50 Watts RMS sits perfectly in the sweet spot. It provides enough clean wattage to drive the speakers efficiently while remaining safely within their mechanical limits.Sensitivity and Volume: With an efficiency rating of 89 dB (1W/1m), the Marantz speakers do not require massive amounts of power to reach loud listening levels. The MR 750 will easily drive them to room-filling volumes in standard domestic spaces without distorting.🎵 Sonic SynergyThe physical build of your vintage Marantz speakers pairs beautifully with the modern engineering choices inside the Magnat unit:Taming the Ribbon Tweeter: The DMS 150 features an exotic ribbon tweeter capable of extending up to an incredible 60,000 Hz. Ribbon tweeters are notoriously revealing and can sometimes sound overly analytical or sharp with harsh digital sources. The Magnat MR 750 utilizes a tube preamplifier stage (ECC 81 twin triodes). This introduces a touch of classic warmth and organic smoothing to the high frequencies, yielding an incredibly smooth, non-fatiguing top end through the ribbon drivers.Controlling the Woofer: The DMS 150 uses a relatively large 200 mm (8-inch) cone woofer in a sealed or compact enclosure. Large vintage woofers require good damping factors to keep bass notes tight. The solid-state, transistor power amp stage of the Magnat ensures the woofer receives snappy, punchy current, preventing the low-end from sounding “muddy” or slow.🛠️ Modern Convenience UpgradesPairing this receiver with your vintage speakers allows you to enjoy modern connectivity that your old gear lacks natively. You can feed high-quality audio directly to your Marantz speakers using the Magnat's HDMI ARC port for your TV, built-in lossless Bluetooth aptX streaming, and an onboard Wolfson DAC for high-resolution digital inputs. It also features a dedicated MM Phono stage if you plan to spin vinyl through the setup.