Circle Labs Audio

The Circle Labs A200 output cascades are powered by proprietary Circle Power technology. The output impedance of the amplifier is only 0.016 ohms, and the damping coefficient exceeds 500.

The Circle Labs P300 is a fully balanced preamp with neutral sound and minimal signal path length. It is built on modern JFET and BJT transistors, uses the proprietary Circle Amp topology and a 63-step relay volume control, and the power supply is organized through two independent transformers and proprietary low-noise stabilizers.

The Circle Labs M200 is a powerful stereo amplifier that can also work as a monoblock. In stereo mode, it outputs 160 watts at 8 ohms and 300 watts at 4 ohms, and in monoblock mode, it outputs up to 600 watts at 8 ohms and 930 watts at 4 ohms.

The primary winding of the step-up transformer is made of a braided wire with 25 cores isolated from each other by a silk braid. The secondary winding is made of high purity copper wire. The transformer provides a very low input resistance (0.25 ohms/22 ohms) to minimize signal loss of the connected pickup head.

The Circle Labs M500 is designed in the "dual mono" concept with separate power supplies for each channel, complemented by a DC interlock circuit and toroidal transformers with a total power of 1,200 watts. This guarantees stability and reliability.

The AS100 has a 63-step volume control mounted on a resistive matrix with a tolerance of 0.1%, controlled by a relay for precise channel balance, reliability and low noise. The "dual mono" design with separate toroidal transformers with a power of 400 watts each and a total filter capacitor capacity of 200,000 UF ensures low distortion and wide compatibility with acoustic systems.