Polk Audio- SPA500 subwoofer amplifier Dayton Audio

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. Cutout dimensions: 10" W x 10" H. Power Output (RMS @ 70V) Range -- Output Channels 1 Output Connectors 476 Output Types 285286 Inputs 2 Input Connectors 299 Input Impedance 12K ohms Signal-to-Noise Ratio 98 dB A-weighted THD @ Rated Power 0.0092 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 Crossover -- Low Pass Adjustment 30 Hz – 200 Hz Dynamic Range -- Frequency Response 30 Hz – 200 Hz Efficiency 0.75 Gain -- Bass Boost -- Voltage Requirement 115/230 VAC 50 Hz/60 Hz Auto-on Sensitivity -- Stand-by Power Rating 115V 24W; 230V 18.4W Special Features Parametric EQ Patented tracking downconverter Advanced soft clip circuitry Class AB output stage Variable low pass filter Designed for serious sound enthusiasts, this fully functional amplifier delivers a robust 540 watts of high-performance power into a 4-ohm load, providing deep, rich bass that fills any room. Condition: Excellent, fully functional High-end features: Powerful output: 540W peak power output into 4 ohms (273W RMS into 8 ohms). Class-G technology: This innovative topology delivers power on demand, resulting in greater efficiency, less heat, and more power for the subwoofer driver. Built-in Parametric EQ: Precisely tailor your low-end with adjustable frequency (18–80 Hz), bandwidth (Q 0.1–1), and level (-14.5 to +6 dB) settings. Variable low-pass crossover: Fine-tune the crossover from 30–200 Hz to achieve a seamless blend with your main speakers. Advanced protection: Advanced soft-clipping and optimized thermal circuitry protect both the amplifier and your subwoofer from damage. UFlexible inputs: Features both RCA line-level inputs and a dedicated LFE input to connect to most audio systems. Please note: The product description mentions "Power Port" technology and a "remote control" as features, but these are not characteristic of the Dayton Audio SPA500. It also specifies "wood-grain sides," which is likely a custom modification or part of an external enclosure, as the standard SPA500 is a plate amplifier designed for mounting inside a subwoofer cabinet. Price: $225 OBO

Condition

Used (normal wear)

Features

Remote control, Touch control, Mounting Bracket

Connectivity

Wired

Model

SPA500

Type

Subwoofer

Brand

Polk Audio / Daytona