Amplifier Class-AB 500Wrms

One of the most technologically advanced subwoofer amplifiers on the market today! The Dayton Audio SPA500 subwoofer amplifier is based on a state-of-the-art Class-G circuit topology that combines the proven high power, high fidelity characteristics of a Class-AB amplifier with a patented tracking down converter power supply to achieve an operating efficiency up to 86%. You get the efficiency of a Class-D amplifier without compromising audio quality and reliability. The Class-AB output stage provides the clean and low-distortion sound that audiophiles demand, without any of the instability problems that plague other high-efficiency amplifier designs.
This American-designed and engineered amplifier uses patented circuitry that continuously tracks the input signal to modulate or control the voltage available to the output stage. This “tracking” capability delivers the exact amount of power based on demand instead of constantly keeping it in reserve, so the output stage only draws the amount of power that is required at any given time. Less energy is wasted as heat, and more power is available for the subwoofer driver. With its enhanced thermal management, the SPA500 is an upgrade over previous models—making it a nearly bulletproof amplifier choice for today’s demanding HT audio and music playback applications.

The Dayton Audio SPA500 is a Class-AB Subwoofer Amplifier with a special power-supply that delivers the efficiency of a Class-D design, without compromising audio quality and reliability.

• High power Class-AB output stage for clean, controlled output
• Patented tracking downconverter power supply for high efficiency
• Toroidal power supply transformer for large current supply
• Low frequency parametric EQ allows you to boost or cut to custom-tailor sound and work room resonances
• Advanced soft clip circuitry improves headroom and protects woofers
• OTC™ (Optimized Thermal Circuit) protects amplifier from potential heat damage
• Hercules heat sinks dissipate and control heat for extreme reliability

Product Height 303mm
Product Width 303mm
Product Depth 254mm
Cut-Out 254mm²
273 Watts* into 8 ohms
540 Watts* into 4 ohms
Output Channels 1
Output Connector Wires
Inputs 2
Input Connectors RCA
Input Impedance 12K ohms
Signal-to-Noise Ratio 98 dB A-weighted
THD @ Rated Power 0.92%
Parametric EQ Frequency: 18 Hz – 80 Hz
Bandwidth: 0.1 – 1 Q
Level: -14.5dB – +6dB
Phase Adjustment 0° (NOR) or 180° (REV)
Low Pass Adjustment 30 Hz – 200 Hz
Frequency Response 30 Hz – 200 Hz
Efficiency 75%
Stand-by Power Rating 230V 18.4W
Special Features
Parametric EQ
Patented tracking downconverter
Advanced soft clip circuitry
Class AB output stage
Variable low pass filter