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Dayton Audio SPA250DSP Subwoofer Plate AmplifierElite Control with DSPDayton Audio's SPA250DSP true 250 watt digital switching plate amplifier features advanced signal processing control that every audio enthusiast wants. With Class D output topology, the SPA250DSP delivers high-impact bass performance for thundering lows. Complete with multiple DSP functions including 5-band PEQ, LPF, phase, subsonic filter, limiter, delay, and HPF the SPA250DSP gives you the ultimate control to fine tune your audio system. This power and flexibility is accessible via PC-GUI software and our innovative single-knob LCD control panel.
Whether building a new subwoofer, or bringing an old speaker back to life by replacing an old plate amp, the Dayton Audio SPA250DSP is an excellent option.
Key Specs:Power Output: 250W RMS into 4 ΩTHD+N: Signal-to-Noise Ratio: 97.9 dB (A-Weighted)Input Sensitivity (RCA): 320mV - 1.4VInput Sensitivity (XLR): 630mV - 2.7VPower Requirements: 110-120/220-240 VAC (selectable, 50/60HZ)Dimensions: 10-1/4" H x 7-1/4" W x 2.125" DCutout Dimensions: 9-1/4" H x 6-1/4" WWe Got Your Back
DSP Plate Amplifier FeaturesThe SAP250DSP has all of the features to give you complete control over your entire audio system from the back of the amp. The amp's single-knob control panel allows you to fine tune your DSP settings on a high-contrast LCD display. The back of the amp also allows you to attenuate your input, select power mode, and connect to your computer via USB. With a variety of inputs including XLR-1/4" TRS combo jacks and RCA, the SPA250DSP allows you to connect to virtually any source. XLR and RCA outputs allow you to pass signal to other systems or speakers, such as your mains. The SPA250DSP also has selectable 120/220 VAC power.
This product is sold brand new. A manufacturer warranty applies only when the manufacturer provides one for this item.
Return requests must be submitted within 14 days of delivery and approved by our RMA department before the item is shipped back. Non-defective returns may be subject to a minimum 25% restocking fee and return shipping charges. Unauthorized returns are not eligible for credit or refund. Read the full return policy.
The compact size and lightweight design of the SPA250DSP fit into almost any subwoofer enclosure.
Auto: Amp goes into standby after no detected signal input for 20 minutes - Amp will automatically turn on typically in one second or less once audio signals are resumed.On: Amp is always on, regardless of input signal status.2. Analog Input AttenuationAffects analog balanced and unbalanced inputs only
Normal: No attenuationHi: Attenuates input signal by -6dB 3. USB ControlUsed for PC-GUI communication with custom PC software included with your amp
Feature ControlSingle knob digital actuator with single/double-click enabled with rotary scrolling to navigate the amp’s extensive feature menu
Limiter LEDLit when Limiter is active (Red).
Standby/On LEDRed when amp is in energy saving “stand by” state and Green when amp is operating normally
Digital Signal Processing FeaturesThis unique amplifier allows you to fine tune your system's low frequency performance, and at the same time high pass to your mains (or satellites) protecting them from damage due to over excursion. Digital Signal Processing features including 5 PEQ bands, LPF, phase, subsonic filter, limiter, mains delay, and HPF are accessible via a single-knob control panel on the back of the amp or a fast, intuitive PC-based GUI software.
Note: Windows 10 and 11 User Microsoft .net Framework 3.5 is required for the SPA250-DSP software to run properly. This is not installed by default in Windows 10 or 11.
DSP Processing Block Diagram Volume/PhaseUSB Link Indicator: When the communication via USB with amp is successful, the GUI’s LED indicator will light green. Otherwise, LED stays redProcessing Selection: Navigate across the DSP menu to adjust various DSP parametersSub In/Out Monitor: Monitor the input signal and sub output signal levels.Tools Drop Down Menu: Utilities for amp DSP managementVolume: Adjust the level (gain) of the subwoofer outputPhase: Continuously adjustable phase from 0° to 180° Low Pass & Subsonic Filters
Low Pass Filter
Subsonic FilterFilter ON/OFF Button: Enable or disable the selected filter.Slope: Select roll-off gradient of the selected filter: -12dB/-24dB per octave.Frequency (Hz): Adjust cut-off frequency of the selected filter 5-Band Parametric EqualizationPEQ Window: Graphical trace is NRT editable. Bands can be shaped by cursor or direct input and/or sliders
5 Band-digital PEQ Adjustments:
a. Band On/Off: Bypass or enable by clicking the colorized 1~5 buttons
b. Center Frequency (CF): Adjust Center Frequency of each EQ band, 10~200Hz, steps: 1Hz.
c. Gain: Adjust the EQ gain (apparent volume), -12 ~ +6dB, steps: 0.1dB
d. Q (EQ width): Adjust the “Q” value, 0.4~16 , step: 0.1
Dual-Band LimiterDual-Band Limiter Adjustments:
a. Threshold: Adjust the limiter threshold, 0~-12dB, step: 0.1dB
b. Attack: Adjust limiter’s “attack time”. This controls the time taken to attenuate signals over the threshold to the specified threshold level. Range: 1/5/10/20/100ms
c. Release: Adjust limiter's “release time”. When signal is below threshold level, this controls the time taken to restore back to original level. Range: 60/120/240/480/1000/2000ms
d. Frequency: The crossover frequency point between the 2 bands: Band 1 (Low Frequency) & Band 2 (High Frequency).
High Frequency OutThis block controls the DSP parameters for line level output only.
Delay: Adjust the time difference between High Frequency out and Subwoofer out.
HPF Adjustments:
Filter ON/OFF: Bypass or Enable the selected filter
Slope: Select roll-off gradient of the selected filter: -12dB/-24dB per octave
Frequency: Adjust cut-off frequency of the selected filter
This product is sold brand new. A manufacturer warranty applies only when the manufacturer provides one for this item.
Return requests must be submitted within 14 days of delivery and approved by our RMA department before the item is shipped back. Non-defective returns may be subject to a minimum 25% restocking fee and return shipping charges. Unauthorized returns are not eligible for credit or refund. Read the full return policy.