Product Overview & Specifications
The Atoll HQA (High Quality Amplifier) is a high-performance stereo integrated amplifier delivering 2 x 80 Watts of power, capable of driving a wide array of demanding loudspeakers. Engineered with an ultra-wide frequency bandwidth (1Hz to 300kHz) and a compact, mechanically rigid chassis, the HQA provides a pure, transparent soundstage free from micro-dynamics veiling or electronic distortion.
Inside, the amplifier features high-current 16A audio MOSFET power transistors, a massive 300VA low-noise toroidal transformer, and a generous 44,000 µF Vishay capacitive filter array. Built for long-term reliability and ease of serviceability, the chassis incorporates a 6mm PMMA non-conductive rear panel to eliminate electrical crosstalk, machined Delrin decoupling feet, and a clean PCB layout designed to be easily serviced for decades to come.
KEY FEATURES & SYSTEM HIGHLIGHTS
- High-Current MOSFET Output Stage: Equipped with special audio-grade MOSFET transistors rated at 16A capacity to deliver dynamic, effortless power into low-impedance speaker loads.
- Ultra-Wideband Transparency: Extremely wide frequency bandwidth (1Hz to 300kHz) preserves low-level reverberation details, micro-transients, and precise spatial soundstaging.
- Robust Linear Power Supply: Features a low-noise 300VA toroidal transformer, dedicated driver-stage shunt regulation, and 44,000 µF of 105°C Vishay filtering capacitors.
- Resonance & Electrical Isolation: Built on a mechanically welded chassis with a 6mm non-conductive PMMA rear panel and 3 machined Delrin feet to eliminate micro-vibrations and connector crosstalk.
- Loudspeaker & Circuit Protection: Includes integrated short-circuit and thermal overload protection to safeguard both the amplifier and connected speakers.
- Designed for Decades of Serviceability: Features solid aluminum control knobs and a clean, widely spaced printed circuit board layout to ensure straightforward maintenance and repairability.
SPECIFICATIONS
| Specification | Detail |
|---|---|
| Product Category | Stereo Integrated Power Amplifier |
| Power Output | 2 x 80 Watts RMS |
| Frequency Response | 1 Hz – 300 kHz |
| Output Transistors | High-Current Audio MOSFETs (16A capacity) |
| Power Transformer | 300 VA Low-Noise, Low-Loss Toroidal Transformer |
| Power Supply Capacitance | 44,000 µF (105°C Vishay Capacitors) |
| Driver Stage Regulation | Independent Power Supply Stage with Shunt Regulation |
| Protection Systems | Integrated Overload & Short-Circuit Protection |
| Rear Panel Construction | 6 mm Non-Conductive PMMA Panel (Reduces Connector Coupling) |
| Isolation & Feet | 3 Machined Delrin Decoupling Feet |
| Control Knobs | Solid Machined Aluminum |
| Dimensions & Chassis Type | Mechanically Welded Rigid Metal Chassis |
| Net Weight | 14.0 kg (30.8 lbs) |
Customer Reviews
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The Offer: If you are happy with our quote, simply contact us to complete your purchase.
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Neodio HQA Power Amplifier
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