CIRCLE LABS LAUNCH TWO NEW AMPLIFIERS AT WARSAW
Circle Labs has announced two new amplifiers, the Circle Labs AS100 integrated amp and Circle Labs M500 stereo power amplifier.
Their premiere will take place at the Audio Video Show in Warsaw on October 24th-26th 2025.
FLAGSHIP HYBRID DESIGN CIRCLE LABS M500
Circle Labs has unveiled its new flagship hybrid power amplifier, the Circle Labs M500. Designed from the ground up with proprietary circuitry, it operates as either a stereo or monoblock amplifier, delivering 180 W per channel at 8Ω (stereo) or up to 1,200 W at 4Ω (monoblock). A three-step input sensitivity control allows flexible pairing with different preamplifiers.
VALVE INPUT STAGE AND CIRCLE POWER TECHNOLOGY
At the heart of the M500 is a single ECC88/6922 triode valve in an SRPP configuration, paired with a Mundorf Silver Gold Oil capacitor to preserve signal purity and minimise distortion. Circle Labs’ Circle Power current stage merges elements of single-ended and solid-state design, using Burr-Brown J-FETs and Sanken bipolar transistors for high dynamic control and low noise.
The Circle Labs M500 features a dual-mono layout with separate 1,200 W toroidal transformers and 880,000 µF total capacitance, ensuring stability and clean power delivery. A shielded transformer powers the valve stage, while DC-blocking circuits contribute to quiet operation.
CIRCLE LABS AS100 INTEGRATED AMPLIFIER
The Circle Labs AS100 is a solid-state integrated amplifier offering 75 W per channel into 8Ω and 140 W into 4Ω. It uses the same Circle Power topology for transparent, neutral sound.
The AS100 features a 63-step resistor ladder volume control with 0.1% tolerance, operated via relays for precise channel balance and longevity. Dual-mono construction with separate 400 W toroidal transformers and 200,000 µF of capacitance ensures low distortion and wide speaker compatibility.
Follow all of our Audio Video Show Warsaw 2025 coverage here
AUDIO VIDEO SHOW WARSAW 2025 INFO
Audio Video Show Warsaw takes place on the 24th-26th October 2025.
Opening Times:
Friday 24th October 12:00 – 20:00
Saturday 25th October 10:00 – 20:00
Sunday 26th October 10:00 – 17:00
The show is split between three locations, the the PGE Narodowy (National Stadium), Sobieski Hotel and Golden Tulip Hotel.
The Audio Video Show Warsaw 2025 promises 600 HiFi brands, 160 exhibitors and 185 exhibition rooms and spaces across the three venues, it is the second biggest HiFi Show in Europe.
Tickets:
Tickets are available at the ticket office, priced at 60 PLN. Three-day passes are also available for 90 PLN (valid from Friday to Sunday).
Tickets and passes are exchanged at the entrance for a wristband, which entitles you to entry to the entire exhibition (all three locations). The ticket price includes an 88-page exhibition guide.
Free admission for visitors up to 16 years of age.
Tickets available here
