1. Introduction
The Dayton Audio SA230 subwoofer amplifier is designed to power a passive subwoofer speaker system. This manual provides detailed instructions for the proper installation, operation, and maintenance of your SA230 amplifier.
2. Safety Information
- Read all instructions before operating the amplifier.
- Retain this manual for future reference.
- Do not expose the amplifier to rain or moisture.
- Do not block ventilation openings. Ensure adequate airflow around the unit.
- Disconnect power before making any connections or performing maintenance.
- Refer all servicing to qualified service personnel.
3. Product Overview
3.1 Front Panel Controls
The front panel of the SA230 features controls for adjusting the subwoofer's output and a power indicator.
- POWER Button: Press to turn the amplifier on or off.
- POWER LED: Illuminates when the amplifier is powered on.
- PHASE Control: Adjusts the phase of the subwoofer output from 0° to 180°. This helps to blend the subwoofer's output with the main speakers.
- FREQ (Crossover Frequency) Control: Adjusts the low-pass filter frequency from 40 Hz to 120 Hz. This determines the upper frequency limit of the subwoofer's output.
- GAIN Control: Adjusts the overall output level of the subwoofer amplifier.
3.2 Rear Panel Connections and Controls
The rear panel provides various input and output connections, along with additional controls for integration into your audio system.
- HI LEVEL IN/OUT: Speaker-level inputs and outputs for connecting to a receiver or amplifier that does not have dedicated subwoofer outputs.
- LINE IN/OUT: RCA line-level inputs and outputs for standard audio connections.
- LFE INPUT: Dedicated RCA input for Low-Frequency Effects (LFE) signals from an A/V receiver.
- BASS BOOST Switches: Provides selectable bass boost at 25 Hz or 40 Hz, with 0 dB, 6 dB, or 12 dB gain options.
- REMOTE TURN ON Switch: Selects the amplifier's power-on mode: Manual, Auto, or 12V Trigger.
- 12V TRIGGER IN/OUT: Connects to a 12V trigger source for automated power control.
- SUBWOOFER OUTPUT: Speaker terminals for connecting to a passive subwoofer. Minimum impedance is 4 ohms.
- AC VOLTAGE SELECTOR: Switch to select between 120V and 240V AC input voltage.
- POWER INLET: Connects the detachable AC power cord.
4. Setup
4.1 Placement
Place the SA230 amplifier in a location that allows for adequate ventilation. Avoid enclosed spaces that could restrict airflow. Ensure the amplifier is on a stable, level surface.
4.2 Connections
Before making any connections, ensure the amplifier is unplugged from the power outlet.
- Subwoofer Connection: Connect your passive subwoofer to the SUBWOOFER OUTPUT terminals on the rear panel. Observe correct polarity (+ to + and - to -). The amplifier supports a minimum impedance of 4 ohms.
- Input Signal Connection (Choose ONE method):
- LFE Input: If your A/V receiver has a dedicated LFE output, connect it to the LFE INPUT on the SA230 using a single RCA cable.
- LINE IN: For receivers or preamplifiers with stereo RCA outputs, connect them to the LINE IN (Left and Right) inputs on the SA230.
- HI LEVEL IN: If your source component only has speaker-level outputs, connect them to the HI LEVEL IN terminals. You can then use the HI LEVEL OUT terminals to pass the signal to your main speakers.
- 12V Trigger Connection (Optional): If your system supports 12V trigger control, connect a 12V trigger cable from your source component to the 12V TRIGGER IN terminal. Set the REMOTE TURN ON switch to 'TRIGGER'.
4.3 AC Voltage Selection and Power Connection
The SA230 features an AC voltage selector. Ensure this switch is set to the correct voltage for your region (120V or 240V) before connecting the power cord. Incorrect voltage selection can damage the amplifier.
After all audio connections are made and the voltage is correctly selected, connect the supplied AC power cord to the POWER INLET on the rear panel and then to a suitable wall outlet.
5. Operation
5.1 Power On/Off Modes
The SA230 offers three modes for power control, selected via the REMOTE TURN ON switch on the rear panel:
- MANUAL: The amplifier is turned on and off using the front panel POWER button.
- AUTO: The amplifier will automatically turn on when an audio signal is detected and enter standby mode after approximately 15 minutes of no signal.
- TRIGGER: The amplifier will turn on and off in response to a 12V trigger signal connected to the 12V TRIGGER IN.
5.2 Adjusting Controls
Adjust the front panel controls to achieve optimal sound integration with your main speakers:
- GAIN: Start with the GAIN control at its minimum setting. Play audio and slowly increase the GAIN until the subwoofer's output blends seamlessly with your main speakers without overpowering them.
- FREQ (Crossover Frequency): Adjust the FREQ control to set the upper limit of the subwoofer's frequency response. A common starting point is to set it slightly above the lowest frequency your main speakers can reproduce. Experiment to find the best blend.
- PHASE: Adjust the PHASE control (0° to 180°) to ensure the subwoofer's sound waves are in phase with your main speakers at the listening position. This can improve bass impact and clarity. Listen for the strongest and most coherent bass response.
- BASS BOOST: Use the BASS BOOST switches on the rear panel to apply a boost at 25 Hz or 40 Hz if additional low-frequency emphasis is desired. Experiment with the 6 dB or 12 dB settings to suit your preference and room acoustics.
6. Maintenance
To ensure long-term performance, keep the amplifier clean and free from dust. Use a soft, dry cloth for cleaning. Do not use liquid cleaners or solvents.
6.1 Fuse Replacement
If the amplifier does not power on, check the fuse. The fuse holder is located within the AC power inlet module on the rear panel. Always replace the fuse with one of the same type and rating.
- Disconnect the power cord from the wall outlet and the amplifier.
- Locate the fuse holder within the AC power inlet. It may require a small flat-head screwdriver to gently pry open or slide out.
- Remove the old fuse and insert a new fuse of the correct rating (4A/250V for 120V operation, 2A/250V for 240V operation).
- Securely reinsert the fuse holder.
- Reconnect the power cord.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No power, Power LED off | Power cord disconnected; Blown fuse; Incorrect AC voltage selection. | Check power cord connection; Replace fuse (see Section 6.1); Verify AC voltage selector setting. |
| No sound from subwoofer | Incorrect input connection; GAIN control too low; Subwoofer wiring incorrect; Source component issue. | Verify input cables are connected correctly; Increase GAIN; Check subwoofer wiring polarity; Ensure source component is sending a signal. |
| Distorted sound | GAIN set too high; Subwoofer overloaded; Incorrect crossover setting. | Reduce GAIN; Ensure subwoofer is rated for amplifier power; Adjust FREQ control. |
| Auto-on not working | REMOTE TURN ON switch not set to AUTO; Input signal too low. | Set REMOTE TURN ON to AUTO; Increase input signal level from source component. |
8. Specifications
| Feature | Specification |
|---|---|
| Output Power | 230 Watts |
| Number of Channels | 1 |
| Minimum Impedance | 4 Ohms |
| Voltage | Selectable 120V/240V |
| Item Dimensions (L x W x H) | 13.88 x 17.25 x 3.75 inches |
| Item Weight | 18.92 pounds |
| Material | Steel, Aluminum |
| Certifications | CE, FCC, RoHS, WEEE |
9. Warranty and Support
For warranty information or technical support, please refer to the documentation provided with your purchase or visit the official Dayton Audio website. Keep your proof of purchase for warranty claims.