DaytonAudio SPA250DSP User Manual

Note: Unit is set at the factory for 120V operation. Be sure to change the fuse

(2A rating) before switching to 230V operation.

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FCC Statement

1. This device complies with Part 15 of the FCC Rules.
Oper

ation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that
may cause undesired operation.

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Operating Guide: Dayton Audio

SPA250DSP Subwoofer Power Amplifiers

Table of Contents

Back panel and input/output (I/O) definition ............................................................................................................... 5

SPA250DSP wiring ........................................................................................................................................................ 6

Amp system block diagram ........................................................................................................................................... 7

DSP processing block diagram .................................................................................................................................... 7

Controlling your subwoofer via PC GUI ...................................................................................................................... 8

Volume/Phase ......................................................................................................................................................... 9

LPF and Subsonic ................................................................................................................................................ 10

5-Band PEQ .......................................................................................................................................................... 11

Limiter ..................................................................................................................................................................... 12

High Frequency Out ............................................................................................................................................. 13

Feature Menu display ............................................................................................................................................14-15

Firmware update guide ..........................................................................................................................................16-20

DSP Functions .............................................................................................................................................................. 21

Feature Controller (LCD matrix, single-knob) .................................................................................................. 21

Advanced Control (for GUI via USB port, PC) ................................................................................................. 21

Base Specifications (Audio Precision®) ................................................................................................................... 22

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Back panel and input/output (I/O) definition

1. Power Mode: Select the either energy-saving or “always-on” power mode

o Au

to: Amp goes into standby after no detected signal input for 20 minutes*

o On: Amp is always on, regardless of input signal status.

* Amp will automatically turn on typically in one second or less once audio signals are resumed.

2. Analog input attenuation: Affects analog balanced and unbalanced inputs only.

o Normal: No attenuation.

o Hi: Attenuates input signal by -6dB.

3. USB Control: Used for PC-GUI communication with custom PC software included with your amp.

Please refer to PC-GUI user guide on Page 8. USB also allows for firmware update by Dayton Audio

release. See Page 16 for more on the system “flash” update process.

4. Feature Control: Single knob digital actuator with single/double-click enabled with rotary scrolling to

navigate the amp’s extensive feature menu.

5. Limiter LED: Lit when Limiter is active (Red).

6. Standby/On LED:

o Red when amp is in energy saving “stand by” state.

o Green when amp is operating normally.

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SPA250DSP wiring

Connect to speaker driver (+)

Connect to speaker driver (-)

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