Pre/Power Amplifiers

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Ed Selley  |  Nov 19, 2011
A sumptuous Italian pairing with sonics to match the exquisite looks You have to hand it to Italian designers: they sure do know how to make a statement. These mightily imposing valve power amplifiers dubbed 845 Monoblock and accompanying PhL-5 preamplifier simply ooze luxury. At £9995 per pair, the monoblock employs twin 845 tubes in parallel single-ended pure Class A mode, with two 6SN7 dual-triodes used as drivers and, as you might expect, zero negative feedback. The transformers are hand-wound with litz wire to avoid the use of solder and are ‘potted’ in a mix of resin and gravel to provide mass damping.
Review: Andrew Everard, Lab: Paul Miller  |  Jan 16, 2025  |  First Published: Dec 01, 2024
hfnoutstandingA new addition to MBL’s Cadenza Line, the C41 is a digital-only DAC/preamp that boasts custom reclocking, digital filtering and a trick that side-steps ‘digital clipping’

Based in Berlin, German company MBL is perhaps still best known for its omni-directional Radialstrahler loudspeakers [HFN Jun ’21], spreading their output over 360o in the cause of creating sound that fills a room. The idea isn’t new – the design was first launched at IFA in Berlin in 1979, in the times when audio was a major focus of that show – but it has been developed and refined over almost five decades, and is still a mainstay of the company’s lineup.

Review: Andrew Everard, Lab: Paul Miller  |  Mar 04, 2022
hfnoutstandingHandbuilt in Berlin, this preamp and monoblock power amp defies the industrial look, favouring instead an exquisite finish. And the sound more than lives up to the style

By any standards, the Noble series from Berlin-based MBL is a looker. The components aren't massive – in place of slabby high-end units wearing their audio prowess on their sleeve, as it were, both the £11,500 N11 preamplifier and the N15 mono power amplifiers, at £13,900 apiece, are relatively slender units. They are also immaculately finished in a choice of gloss black or white, with accents for the control elements available in either polished gold or palinux (silver), with black detailing also offered if you go for the white main colour.

Hi-Fi News Staff  |  Nov 13, 2014
McIntosh’s original MC275 featured as an ‘Audio Milestone’ [HFN Dec ’10], but what’s reviewed here is the current production version of this most famous power amplifier. It’s the same as the 2011 Anniversary Edition but with stainless steel rather than a gold chassis. Its most spectacular outward feature, described in staid McIntosh tech-speak as ‘small tube illumination for amplifier status operation’, comprises LEDs indicating status or output tube failure. This is a part of a protection circuit system which will also shut the amp down if speaker wires are shorted or there is a gross impedance mismatch.
Review: Mark Craven, Lab: Paul Miller  |  Apr 21, 2023
hfnoutstandingWith its rack-mount 'ears' and 2U chassis, Mac's MI502 amplifier has its sights set on the custom install market. But is this Class D powerhouse also a treat for purist stereophiles?

It's not unusual to find consumer hi-fi hardware making some concessions to the custom installation (CI) space – typically connectivity, such as RS232 and Ethernet – that enables a CI professional to integrate and control the product in a wider system. Yet there are also items, such as McIntosh's MI502, that are more deliberately aimed at the CI market. A slimline two-channel power amplifier, it looks a world away from some of the Binghamton, New York-based company's heavy-hitters. Should it be given a swerve by the dedicated audiophile? Or might it be just what the doctor ordered?

Hi-Fi News Staff  |  Jan 22, 2015
Here’s a stylish new Meridian product right in the mainstream: a headphone amp/USB DAC with optional outboard PSU. It wouldn’t be a Meridian, though, without having some novel features. The cases are interlocking aluminium extrusions, double-skinned to enhance screening, and having no visible fasteners holding it together – clever. The PPS power supply is not dedicated to the PHA headphone amp but provides five 12V/500mA DC outputs on mini-DIN sockets, each incorporating dual-stage linear voltage regulation, for powering other Meridian products as well.
Review: Ken Kessler, Lab: Paul Miller  |  Dec 01, 2017
hfncommended.pngSomething for the high-end user with a sense of fun – Metaxas' Marquis 'Memento Mori' headphone amp marries form with function and the result is rather jolly. Er, Roger.

Headphones now rule – period – and as a vivid illustration of the current profusion of cans, I was staggered to see, at a store in Tokyo, a selection of something like 1500 headphones, and with plenty of high-end brands notable by their absence.

Review: Andrew Everard, Lab: Paul Miller  |  Jun 01, 2018
hfncommended.pngThis slimline amplifier from an established French brand may suggest another product from the same country, but it's a very different prospect with some unique features

So, it's a slimline amplifier, and it's French – already thinking of the 'D' word? But while it might seem that the M-One amplifiers from Micromega could be 'inspired' by the success of Devialet's range, in fact they have little in common beyond their country of origin and a passing resemblance in dimensions: under the skin they're very different animals.

Ken Kessler & Paul Miller  |  Dec 16, 2009
Time to disregard all the French felonies that form my antipathy towards our neighbour across the Channel: the revived Micromega has returned to the market with a family of new products offering build quality, style, functionality and, above all, prices belying manufacture in Europe. The brand will be a cat among UK pigeons, despite arriving when the economy suggests that this is not the time to launch, or re-launch a brand. Perhaps new owner Didier Hamdi knows something we don’t. Maybe tough times are just made for bargains.
Hi-Fi News Staff  |  Jan 20, 2015
ModWright’s owner Dan Wright argues that ‘Valves are great voltage amplifiers and solid-state devices are great current amplifiers. ’ Hence the combination here: the top of the range ‘DM’ dual-mono version of the LS 36. 5 preamp, with its separate PS 36. 5 power supply, and the KWA 150 Signature Edition power amplifier.
Ed Selley  |  Nov 20, 2011
The largest AMS amplifier is a true giant in all senses of the word You can read all the specs, but nothing can quite prepare you for the arrival of Musical Fidelity’s AMS100. It stands over a foot tall, a foot-and-a-half wide, and by the time it’s plugged in and connected well over three-foot deep. The circuit is a hybrid between that of the company’s smaller AMS50 and range-topping Titan. This new unit has the same topology as the Titan, but is Class A.
Review: Adam Smith, Lab: Paul Miller  |  Sep 11, 2019
hfncommendedThe iconic visuals belie Musical Fidelity's recent change in ownership – so will this familiar M2 series CD/amp combination still tempt the budget-conscious enthusiast?

In these evolving days of digital music, cloud storage and online streaming, it might seem counter-intuitive for Musical Fidelity to release a line-only amplifier and 'plain vanilla' CD player. The £799 M2si integrated has no inbuilt DAC, no Bluetooth, no Wi-Fi and not even a phono stage, or indeed the option of one. And, peer round the rear of the matching £799 M2scd compact disc player, and the only connections you will find are outputs. Once again, it has no digital inputs, no antennae sticking out and no wireless wizardry up its sleeve. What's going on?

Review: Mark Craven, Lab: Paul Miller  |  Feb 21, 2023
hfnoutstandingThe Austrian brand's first multichannel power amp is designed not just for home theatre systems but also to service bi- or even tri-amped stereo set-ups. Is this a trend?

Musical Fidelity is no stranger to big power amplifiers. Its top-of-the-range monoblock, the £3599 M8s-700m, claims a 700W/8ohm output and weighs in at 35.5kg, and the company sells a stereo model in the M8 series too, the £3999 2x500W/8ohm-rated M8s-500s. But perhaps what few expected from the brand, considering its range also consists of DACs, streaming amps, phono stages and CD players – everything a two-channel audiophile could want, in other words – is a seven-channel amplifier. Which is what we have here, in the shape of the M6x 250.7.

Hi-Fi News Staff  |  Nov 13, 2014
Enter Musical Fidelity’s latest ultra-high-power creation, described as ‘a true heir to the [2008] Titan, delivering near-identical sound’. It’s a monoblock design that’s considerably more bank-balance friendly, rated at 700W/8ohm, although this transpired to be conservative. It is part of a new series of high-end components, also including the M8PRE preamplifier. The sturdy casework has a finely-textured black finish and thick aluminium fascias while the M8700m’s heatsinks are smoothly finished.
Review: Andrew Everard, Lab: Paul Miller  |  Apr 10, 2023
Look familiar? This new four-box pre/power stack from Musical Fidelity shares the styling of 2014's Nu-Vista 800 integrated, but is it a high-end contender? You bet it is!

Ever get the feeling we've been here before? Well, the arrival of the latest amplifier system from Musical Fidelity brings a new twist to the whole déjà vu thing as the Nu-Vista naming and macho aesthetics are familiar from the historically hefty Nu-Vista 800 integrated amplifier [HFN Nov '14]. In practice that classic nuvistor tube-equipped integrated amplifier, also rated at 300W/8ohm, has provided the inspiration for both the industrial and technical design of the PRE and PAS we see here, the hybrid nuvistor/transistor concept now evolved into a pre/power set-up, complete with separate PSUs for each. So one box is now four...

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