The Yamaha CD-S700 is a good, no-frills CD player, without any of the SACD gubbins found in its bigger brothers.

It's not without concessions to hi-fi sensibilities – it has a Pure Direct button that disables the digital output and front panel display – and even features a USB port for connecting up an MP3 player or a PC.

Beneath the minimalist exterior, it features a 24-bit/192kHz Burr Brown DAC run in differential mode, plus a triple-wired power transformer feeding separate power supplies for the transport, digital and analogue stages.

It also features the Silent Loader transport mechanism found in its bigger brothers. The silent treatment from the disc transport is remarkably silent. As in, put your ear to the player and nothing happens. In fact, if you turn the display off and leave a disc spinning, you could spend days 'running in' the player without noticing it.

Purer sound

Moving over to the Yamaha A-S700 amp, this 90- watt model includes both MM phono and CD inputs, as well as two extra line inputs and two recording line inputs/outputs.

The CD input is picked out for special treatment; the other inputs can bypass tone and loudness controls via the Pure Direct button, but CD has an additional CD Direct option that bypasses the input selector too.

Once again there are features found in the bigger models, like the ToP-ART (Total Purity Audio Reproduction Technology) symmetrical layout of the complete amplifier circuit, which Yamaha suggests gives a more pure sound.

Confusingly, Yamaha reuses the 'ART' acronym within the ToP-ART package to describe its 'Anti-Resonance and Tough' chassis base.

Unappealing style

If the CD player is minimalist in its approach, the same does not apply to the A-S700, at least by British hi-fi standards.

It includes a tape-monitor, two sets of speaker terminals tone and loudness controls and the aforementioned Pure Direct and CD Direct buttons. However, this does not come at the expense of lots of blinking lights and a garish styling exercise; in black or silver, the amp has a classic appeal and those flat tone/loudness controls hark back to Yamaha products of the 1970s and 1980s.

Loudness and tone controls got a (somewhat justified) bad press in the past, but Yamaha has made the contour of the controls adjust with volume, to prevent that 'all-bass, all-treble, nothing in between' problem that beset tone shaping in the past.

Just right hi-fi

Both products in the 700 series treat any piece of music with equal respect, serving up a dark and dignified representation of what was put on the disc. The closer you get to the Pure Direct performance (on both products), the nearer you get to a supremely detailed, sophisticated musical replay chain.

In other words, you get a distinctly 'right' sound. It's a Goldilocks sound; not too exaggerated, not too dull… just right. And you can apply the same Goldilocks attributes to almost any part of the performance. Stereo? Not too big, not too small… just right. Detail? Not too much, or too little. Vocal articulation? Rhythmic properties? Porridge temperature? You get the message.

This freedom from grace or favour toward a specific musical type is the inverse of the initially impressive school of hi-fi.