Dayton Audio SPA500DSP

The SPA500DSP from Dayton Audio is a 1-channel amplifier that offers versatile performance options. You can choose between an energy-saving mode and an "always-on" mode, allowing the amplifier to respond flexibly to your needs. With an output power of 500 watts RMS at 4 ohms and a signal-to-noise ratio of 97.9 dB, it delivers clear and powerful sound results. The analog input attenuation allows precise adjustment of the input signal, while the USB control supports seamless communication with the PC software. In addition, you can navigate through an extensive function menu and conveniently use the digital control with a one-button operator. The amplifier is also equipped with a 5-band parametric equalizer and a dual-band limiter, allowing for individual sound adjustment.

• Auto: The amplifier switches to standby mode if no signal input is detected for 20 minutes*
  
• On: Amplifier is always switched on, regardless of the status of the input signal.
  
• The amplifier usually switches on automatically within a second or less as soon as audio signals are received again.
  

• Normal: No damping.
  
• Hi: Attenuates the input signal by -6 dB.
  
• USB control: Used for PC GUI communication with the custom PC software supplied with your amplifier.
  
• Function control: Digital one-button control with single/double-click function and scroll wheel for navigating through the amplifier's extensive function menu.
  
• Limiter LED: Lights up when the limiter is active (red).
  

• Lights up red when the amplifier is in energy-saving "standby" mode.
  
• Lights up green when the amplifier is working normally.

• USB connection indicator: If communication via USB with the amplifier is successful, the LED indicator on the user interface lights up green. Otherwise, the LED lights up red.
  
• Processing selection: Navigate through the DSP menu to adjust various DSP parameters.
  
• Sub-in/out monitor: Monitors the levels of the input signal and the sub-out signal.
  
• Tools" drop-down menu: Utilities for the DSP management of the amplifier.
  
• Volume: Adjusts the level (amplification) of the subwoofer output.
  
• Phase: Infinitely adjustable phase from 0° to 180°.

• Filter ON/OFF button: Activates or deactivates the selected filter.
  
• Slope: Selects the roll-off gradient of the selected filter: -12 dB/-24 dB per octave.
  
• Frequency (Hz): Adjusts the cut-off frequency of the selected filter.

• PEQ Window: Graphic track can be edited with NRT. Bands can be edited with the cursor or by direct input and/or
  
• 5 digital 5-band PEQ settings:
  
  • Band On/Off: Bypass or activate by clicking on the colored buttons 1~5
    
  • Center Frequency (CF): Adjusts the center frequency of each EQ band, 10~200 Hz, steps: 1 Hz.
    
  • Gain: Controls the EQ gain (apparent volume), -12 ~ +6 dB, steps: 0.1 dB
    
  • Q (EQ width): Adjusts the "Q" value, 0.4~16, step: 0.1

• Threshold value: Sets the threshold value of the limiter, 0~-12dB, step: 0.1dB
  
• Attack: Sets the "attack time" of the limiter. This controls the time it takes for signals above the
  
• threshold value can be attenuated to the specified threshold value. Range: 1/5/10/20/100 ms
  
• Release: Sets the "release time" of the limiter. If the signal is below the threshold value, this controls the
  
• Time required to restore the original level. Range: 60/120/240/480/1000/2000 ms
  
• Frequency: The frequency transition point between the two bands: Band 1 (low frequency) and
  
• Volume 2 (high frequency).

• This block controls the DSP parameters for the line level output only.
  
• Delay: Sets the time difference between the high-frequency output and the subwoofer output.
  

• Filter ON/OFF: Bypasses or activates the selected filter.
  
• Slope: Selects the roll-off gradient of the selected filter: -12 dB/-24 dB per octave.
  
• Frequency: Adjusts the cut-off frequency of the selected filter.

Technical data

• Ausgangsleistung: 500 Watt RMS an 4 Ohm, THD+N <0,1 % 
• Signal-to-noise ratio: 97.9 dB (A-weighted) 
• Power supply: 110~120/220~240 VAC selectable, 50/60 Hz 
• Dimensions of the amplifier: 260mm H x 184mm W x 54mm D
• Cut-out for amplifier: 235mm H x 158mm W