Circle Labs V1000

The V1000 is a high-end phono preamplifier for MC / MM cartridges, supporting two phono cartridges independently with fully adjustable impedance (10 - 1000 Ohms) and capacitance (0-320 pF). Built with a unique Step-Up Transformer using our own technology. We are one of the few companies that created from BASICS our own SUT design.

V1000 is a phono preamplifier for MC / MM cartridges, supporting two phono cartridges independently with full impedance (10 - 1000 Ohms) and capacitance (0-320 pF) control. Built with a unique Step-Up Transformer using our own technology. We are one of the few companies that created from BASIC our own SUT design. Primary winding made of Lica consisting of 25 wires (each insulated from each other, all in Silk braid. Secondary winding made of high quality copper. All this made it possible to achieve a very low resistance (0.25 Ohm / 22 Ohm) in order to reduce signal loss from the cartridge. The signal from the SUT (Step Up Transformer) goes to the MM preamplifier based on ecc88/6922 tubes (4 pcs.) with fixed polarity via cells. The whole works fully without feedback.

100% dual mono design with independent and isolated circuits for the right and left channels.

The power supply uses Mundorf polypropylene capacitors and a cascaded, two-stage stabilizer without feedback. To reduce interference, the power transformers are housed in a separate enclosure.

On the front of the unit, with the help of two knobs, it is possible to set the classic RIAA equalization, or to make your own changes to better match record releases from before RIAA standardization. Additional knobs include MC / MUTE / MM switching, and arm/insert selection.