It is recommended that the voltage gain should be kept within the limits stated earlier. C2 rolls of the high frequency response of the amplifier, and is necessary as instability might otherwise occur.

We've continuously been impressed with Rega's excellent (and rather affordable) Fono MM range, so it was something of a relief that the latest model, which featured a brand-spanking new look, didn't sacrifice style for sound. That same Rega DNA is still in there throughout the latest Fono MM Mk5 phono stage. Sound quality is first-rate: fantastically detailed, with the upper register particularly impressive. It’s difficult to imagine a more detailed presentation from a phono stage for the money. There are rivals with an equally wide soundstage, but they perhaps don’t shine the spotlight so intensely on each instrumental strand. Detail is where it stands out, but the Gram Amp 2 is also a dab hand at dynamics and timing – although perhaps not with as much bite and punch compared with the Rega.Cantaloupe Island: An ARP Odyssey synth without any reverb or effects was the first instrument through the speakers. Cleaner, more defined—and dare I say with deeper bass—and texture that somehow seemed to make my subwoofer better get along with my speakers and room.

The physical limitations of vinyl mean that the original audio signal has to be altered before it can be recorded onto its tiny grooves – low frequencies are reduced in level and the highs are boosted. The curve that governs this equalisation standard was set by the RIAA (Record Industry Association of America) in 1954.

Metallica Turntable

The prototype was found to work well with both 200 ohm and 600 ohm impedance dynamic microphones, but it should also work well with electret types which have a built-in FET buffer amplifier, but no step-up transformer. The Blue Note reissue of Freddie Hubbard’s Hub-Tones (Blue Note 80 Vinyl, ST-84115) is a beautiful sounding record and exactly the type of recording that would sell a lot of Croft units. Really exceptional phono stages should make an instrument like the trumpet come alive without forcing you to reach for the remote because the top end has too much sizzle.