Pre/Power Amplifiers

First announced in the spring of 2023, unexpected delays to the arrival of NAD's M66 have only heightened anticipation of this flagship 'streaming DAC/preamplifier' - especially among owners of the company's Eigentakt-based M23 power amplifier who have been waiting for its companion product. And, yes, while the £4499 M66 could add its wide-ranging feature set (including app control and room correction) to any power amp, the M23 makes for an aesthetically pleasing fit.

Think JBL and, not unreasonably, you’ll probably think ‘speakers’. The company has been in the loudspeaker business for getting on 80 years, having been founded in California in 1946 by James B Lansing, from whom it takes its name. Lansing himself took his own life just three years later but left an insurance policy to keep the company going, in which form JBL has become an internationally famous audio company and, since 1969, part of what is now Harman International. In 2017 Harman became an independent subsidiary of South Korea’s technology giant, Samsung.

The Violectric name may be new to you, as it was to me, but behind the brand is a company getting on for four decades in business, principally in the pro audio field, where it operates under the rather unusual moniker of Lake People – inspired by the company’s location in the Lake Constance region of Germany. Like many an audio brand from that country, the company designs and manufactures its products in-house, and is proud of the ‘Made in Germany’ label.

The resurrection of Rotel’s Michi series, previously delighting audiophiles in the 1990s, was a hi-fi highlight of 2019. The Japanese manufacturer again created a strand of components (stereo and mono power amps, a preamp and two integrated models) with a focus on both high-end performance and aesthetics, even going so far as to drop the Rotel name from the branding. Then, in 2023, it announced it was revisiting three models in the lineup, making changes inside rather than out.

Tipping the scales at a hefty 26kg, measuring a portly 46cm deep and 17cm tall, and selling for £14,900, T+A's PSD 3100 HV appears every inch the flagship DAC/streamer/preamp. Except that it isn't – that accolade is reserved for the German brand's SDV 3100 HV [HFN Oct '19], which has been deemed its 'reference' model since its arrival in 2019 and remains available for £26,040.

As an increasing number of digital source components come equipped with variable output level one might think that line controllers – preamps without a phono cartridge input facility – are an endangered species. This will make sense to those embarking on an all-digital system, mixing a variety of digital sources and prepared to convert from the analogue disc domain to digital via an A/D converter function. Indeed, some digital control units are digital-only and cannot handle analogue signals at all.

In the late 1980s and early 1990s, the audio underground in the US and Europe finally picked up on the efforts of Japanese audiophiles two decades earlier, and started a revival of single-ended triode amplification. The American interest really got going when enthusiasts started salvaging dusty pre-war systems out of old movie houses. Western Electric's 300B triode, dating back to the dawn of cinema sound systems, became the tube of choice.