Dayton Audio
Dayton Audio - 500W Plate Amplifier - SPA500
Dayton Audio - 500W Plate Amplifier - SPA500
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Description:
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.
Features:
- 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
Specifications:
- 540 watts into 4 ohms (0.92% THD, one-third power duty cycle)
- 273 watts into 8 ohms (0.92% THD, one-third power duty cycle)
- Signal to noise ratio: 98 dB (A-weighted)
- Weight: 7.82kg
Specifications
Specifications
Power output
| Into 4 Ω | 540 W |
|---|---|
| Into 8 Ω | 273 W |
| Minimum load | 4 Ω (assumed: Dayton Audio doesn't state one) |
| Amplifier channels | 1 |
| Amplifier class | AB |
Controls and processing
| Low-pass filter | 30 – 200 Hz |
|---|---|
| Phase | 0° or 180° (switch) |
| Parametric EQ | 1 band: 18–80 Hz, Q 0.1–1, −14.5 to +6 dB |
Inputs and outputs
| Inputs | RCA line in, L/R (summed to mono); RCA LFE in (bypasses the low-pass) |
|---|
Size and mounting
| Plate (W × H) | 303.2 × 303.2 mm |
|---|---|
| Overall depth | 133.3 mm |
| Cutout (W × H) | 254 × 254 mm |
| Back | Sealed |
| Weight | 7.82 kg |
| Clearance | Keep 51 mm (2 in) clear of the plate and vents |
Power supply
| Mains | 230–240 V AC |
|---|---|
| Standby power | 18.4 W at 230 V |
Performance
| THD at rated power | 0.92 % |
|---|---|
| Signal-to-noise ratio (A-weighted) | 98 dB |
| Input impedance | 12 kΩ |
| Efficiency | 75 % |
| Frequency response | 30 – 200 Hz |
- Power as Dayton Audio rates it: at 0.92% THD, based on a one-third power duty cycle.
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