What is perfect for my Fidelity-Research FR-7f (0.15mV) on FR-64fx tonearm is WLM Phonatata phono stage. This phono stage is universal for LOMC (see below)
Don’t know what’s happened, but when i changed my tube push-pull integrated amp to First Watt F2J jfet current power amp (and First Watt B1 preamp) the resolution and imaging significantly improved, now the best combination of phono stage+amp for LOMC became my old current phono stage
WLM Phonata with automatic load impedance. I tried to discuss it way back on audiogon, but nobody knows this particular phono stage, because the company (WLM was a loudspeaker and amp manufacturer in Vienna) closed the business soon after this phono stage was made.
RIAA equalization is implemented across two amplification stages (within current amplification), providing a frequency expansion from 10Hz to 50kHz (Subsonic cut below 10Hz).
The PHONATA offers automatic adjustment of Load-Impedance:
• You don’t have to adjust the load-Impedance of your cartridge (plus the
interconnect-cable between cartridge and Phono-Preamplifier). It goes
automatically thanks to one ingenious piece of circuitry.
• You don’t have to adjust the source voltage of your cartridge as well.
• There are no micro-switches or any other mechanical contacts in the signal-path.
The PHONATA works with two-stage amplification:
• An inductive voltage amplification stage (for MC cartridges) using high
performance professional audio step-up transformers.
• A solid state current amplification stage, using specific MOS-FET transistors with tube-typical harmonic distortion characteristics.
