AVM Ovation SA 8.3 S Stereo Power Amplifier

The AVM Ovation SA 8.3 S is a Class A/AB stereo power amplifier with AVM's new anode-follower tube input stage. AVM's technical data rates it at more than 420 W per channel into 4 ohms and more than 230 W into 8 ohms, from two 1,000 VA toroidal transformers, 24 MOSFETs per channel and 270,000 µF of filter capacitance per channel.

The SA 8.3 S is a stereo power amplifier in AVM's Ovation S line, and the stereo sibling of the MA 8.3 S monoblocks. Its analog circuit is fully DC-coupled, and it is delivered in a flight case.

Key Features of the AVM Ovation SA 8.3 S

• Tube Input Stage: A new anode-follower tube input stage for ultra-wideband frequency response.
• Over 420 W Per Channel Into 4 Ohms: More than 230 W into 8 ohms and more than 700 W into 2 ohms, in Class A/AB.
• Two 1,000 VA Transformers: Two low-stray toroidal transformers for channel separation, with 24 MOSFETs and 270,000 µF per channel.
• Fully DC-Coupled: No coupling capacitors in the signal path, with automatic offset compensation and current-source-stabilized output stages.
• Dual Differential Input Stage: With RCA and XLR high-level inputs.
• Integrated Power Filtering: Across all relevant voltage ranges.
• OLED Display and Triggers: A dimmable OLED graphic display, a 5 to 20 V DC trigger input and AVM's AIR trigger.

What Does the Tube Input Stage Do?

The SA 8.3 S uses a new anode-follower tube input stage, designed for an ultra-wideband frequency response. AVM credits it with a fine musical fluency, combined with high operational reliability and a modern circuit design.

The SA 8.3 S also has dual differential input stages, and the entire analog circuit is DC-coupled to keep coupling capacitors out of the signal path, with automatic offset compensation and current-source-stabilized output stages.

Power and Measured Performance

AVM's technical data rates the SA 8.3 S at more than 230 W per channel into 8 ohms, more than 420 W into 4 ohms and more than 700 W into 2 ohms. Two low-stray 1,000 VA toroidal transformers serve near-perfect channel separation, with 24 MOSFETs and 270,000 µF of filter capacitance per channel.

AVM rates distortion below 0.02% and intermodulation below 0.01% at 25 W into 4 ohms, with a signal-to-noise ratio above 94 dB(A). The frequency response runs from below 1 Hz to above 100 kHz (-3 dB), the slew rate is above 15 V/µs and the damping factor is above 400.

Inputs, Control and Finishes

The SA 8.3 S has RCA and XLR high-level inputs, with an input sensitivity of 1.25 V (for 350 W into 4 ohms) and input impedances of 20 kohm and 40 kohm. A trigger input takes 5 to 20 V DC, and AVM's AIR trigger (AVM Intelligent Remote) is built in. It has a dimmable OLED graphic display.

The aluminum enclosure comes in silver, brushed black, or the Cellini version with a chrome fascia, and the SA 8.3 S is delivered in a flight case.

Who Is AVM?

AVM Audio Video Manufaktur has built hi-fi by hand in Germany since 1986, and its products are sold in more than 50 countries. The range runs from the AVM 30.3 series through the Inspiration and Evolution lines to Ovation S.

The Listening Room Difference

We don't just sell high-end audio, we provide a level of service that's as refined as the products we offer. When you invest in a power amplifier like the AVM Ovation SA 8.3 S, you deserve more than a box on your doorstep. You deserve a partner who understands the art of sound and is committed to helping you experience it at its absolute best.

Owner Michael Hoatson will personally deliver the SA 8.3 S to your home, anywhere in the country. Not a curbside drop-off. Painstaking setup, room placement, and full system integration, from a third-generation audio family with decades of experience. That is how we bring a system to life.

AVM Ovation SA 8.3 S Specifications