While much of today's CES activity is about big press announcements from the world's consumer electronics giants, the show also has much to offer high-end audio fans. For example, Swiss company Nagra, known for its immaculate build quality and celebrating its 60th anniversary this year, has two new amplifiers based around the legendary 300B valve.
The company started in 1951 with its iconic portable tape recorder and, having shown a 300B-based amp prototype at CES 2010, it's now unveiling finished versions of the 300i integrated amplifier and 300p power amp.
Both use the 300B triode valve, first introduced in 1938, in a push-pull configuration to develop 20W per channel.
The amplifiers are designed to give consistent performance with all the various versions of the 300B still on the market, and are handbuilt by the same teams responsible for the manufacture of the company's professional recorders.
More after the break
The circuitry uses multilayer epoxy-glass boards with gold plated tracks to military specifications, selected components throughout and a star-earthed design.
The 300i integrated amp has four inputs – three on RCA phonos, one on XLRs – high-quality relay switching, and volume and balance controls driving motorised Alps Blue Velvet potentiometers. Remote control is also provided.
Soft-start circuitry is used on both units, along with self-diagnosing protection, which also monitors for short circuits or output overload.
The amps have anodised aluminium casework, and Pyrex sleeves to protect the valves, and are supplied with Nagra VFS vibration-absorbing plates which sit below the units as part of a two-stage isolation system.