Floyd Design has been Durob’s Solid State Design department for almost 20 years. This department, headed by Jan de Groot, has been servicing, designing and modifying solidstate circuits since 2002! Jan has a long history and great experience with JFETs and Mosfets. After having been Service Manager from 1986 to 1995 for Luxman, Thorens, AirTight and Bowers & Wilkins in the Benelux region, he became responsible in 1995 for the design and production of Sphinx, a famous Dutch audio brand at the time. In 2002 Jan started to work for Durob Audio, participating in the real-world experience of distribution and servicing, repairing, modifying solid-state reference brands like Krell, Cello, Dartzeel, D’Agostino and more.
Designed in collaboration with Floyd Design, the EVO 300 has a valve preamp with a solid-state power stage that the company claims delivers the best of both worlds – the fluidity of valves and the grip of solid-state circuitry – while still maintaining a coherent sonic signature. The result of this fusion of valve and solid-state engineering know-how is an amp that delivers generous dynamic range and broad stereo imaging with expressive mids and highs plus a tight, controlled bass.
The Primaluna pre-stage uses the brand’s well known six piece 12AU7 configuration. The Floyd Mosfet power stage uses paired Linear Systems JFETs and 20N20/20P20 Mosfets resulting in a 2 x 100 Watt power rating at 8 Ohm. Where possible, they use hard wiring, and if PCBs are needed, they use the highest quality PCBs available (2.5mm thick instead of the standard 1.6mm), 105um (usually 35um) gold plated copper tracks.
The PrimaLuna pre-stage uses two power supplies (including two separate transformers), while the power stage comes with a single 500VA transformer. The starting point for all the power supplies is PrimaLuna’s AC Offset Killer circuit. The amplifier comes with six inputs (5 x Line RCA, 1 x HT) and outputs (tape out, stereo/mono sub, headphone and speakers, of course). It arrives with a fully shielded heavy-metal sub-chassis for the optional MM phono stage.
AC Offset Killer – A PrimaLuna Exclusive
AC Offset Killer is about goose bumps. The ones you get when music comes out of a background so quiet, you may say to yourself “Just how is this possible?” PrimaLuna custom-winds their own massive toroidal power transformers that are low in hum and EMI. But they wanted more. The engineers designed the AC Offset Killer to lower transformer noise to a place no other manufacturer dreams of going, regardless of how bad your electricity is. The result? Sense of space. Texture. The resonance of an acoustic guitar or violin string that seems to trail on forever. The AC Offset Killer will amaze you.
• A hybrid amplifier combining the advantages of valves and solid-state circuitry in one luxurious unit
• 100 Watts per channel @ 8 Ohms
• 5 x stereo RCA inputs & 1 stereo home theater input
• RCA Stereo/Mono Subwoofer output & headphone output
• Tube compliment: 6 x 12AU7