Dayton 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.
Opera
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that
may cause undesired operation.

tion is subject to the following two conditions:

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Operating Guide: Dayton Audio

SPA250DSP Subwoofer Power Amplifier

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 Auto

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:

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

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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