Review: Mark Craven

Unlike the traffic on the motorway for which this stereo amplifier is definitely not named, Canadian manufacturer NAD is rolling along at pace. The M23 auditioned here, available in just a silver finish, is its latest amp to feature high-performance Purifi Eigentakt Class D technology, following in the footsteps of the £3999 M33 BluOS-capable integrated [HFN Aug '20], the seven-channel £4499 M28 power amp, and the more affordable £1749 C 298 stereo amp [HFN Oct '21]. That NAD should have chosen to adopt Eigentakt modules for a trio of models before upgrading its flagship two-channel Masters series power amp is perhaps something of a surprise. But it proves to have been worth waiting for.

Shoppers are always on the hunt for a bargain, so anything labelled 'half-price' attracts attention. Okay, that usually applies more to supermarket biscuits than floorstanding loudspeakers, but with Perlisten's R7t selling for £8100 – pretty much half that of the American company's flagship S7t [HFN Apr '22], while looking strikingly similar – it immediately appears a potential bargain. On the other hand, there must be changes behind the scenes for the price tag to have dropped so much, so the question becomes, will it sound only 'half as good'?

Back in 2016, Simaudio added the MOON ACE to its range of pre, power and integrated amplifiers. A slimline machine with analogue, digital and network connectivity (the latter including Roon Ready status and streaming service support through its proprietary MiND module), the ACE clearly warranted 'just-add-speakers' status. The only problem? Simaudio didn't have any...

Perlisten Audio, a newly arrived loudspeaker manufacturer from Wisconsin, US, has already made an impressive entrance with its flagship model, the seven-driver S7t floorstander [HFN Apr '22]. Yet as that speaker boasts a £16,000 price tag – and a 59kg cabinet – many newcomers to the brand will look elsewhere in the range to see how far their budget can stretch. The £7200 S4b auditioned here isn't exactly 'affordable' but does come with a more manageable bookshelf build, plus the promise of a high-end performance similar to that of its towering stablemate, by virtue of shared technologies.