1. Product Overview
The Seismic Audio SA-155.2 is a high-performance dual 15-inch passive PA/DJ speaker system designed for professional audio applications. These speakers deliver powerful sound suitable for various events and venues, including bands, bars, weddings, churches, and general PA systems. Each cabinet is engineered for durability and optimal sound reproduction.
2. Safety Information
Please read and understand all safety instructions before operating this product. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- Power: Ensure the speakers are connected to an appropriate amplifier with stable power output and impedance matching.
- Placement: Place speakers on a stable, level surface or a compatible speaker stand. Avoid placing them in areas with excessive moisture or extreme temperatures.
- Ventilation: Do not block ventilation openings. Adequate airflow is essential to prevent overheating.
- Cables: Use high-quality speaker cables and ensure all connections are secure to prevent signal loss or damage.
- Hearing Protection: Prolonged exposure to high volume levels can cause permanent hearing damage. Use appropriate hearing protection.
3. Package Contents
Your Seismic Audio SA-155.2 package includes the following items:
- 2 x SA-155.2 Dual 15-inch Speaker Cabinets
4. Setup
4.1 Physical Placement
The SA-155.2 speakers are designed for floor standing placement. Their robust construction with 5/8" plywood front panels and steel grills ensures durability. Each cabinet features pocket handles for easier transport.
Figure 1: Front view of two SA-155.2 speakers. These speakers are designed for floor standing use and feature dual 15-inch woofers with protective steel grills.
Figure 2: Dimensions of the SA-155.2 speaker. Each cabinet measures 12 inches deep, 16 inches wide, and 38 inches high, weighing 51 pounds.
4.2 Connections
Each SA-155.2 speaker cabinet is equipped with a terminal cup featuring two 1/4" inputs for versatile connectivity. These inputs allow for easy connection to an amplifier and also support daisy-chaining multiple speakers.
Figure 3: Rear view of the SA-155.2 speaker, showing the terminal cup with two 1/4" inputs.
Figure 4: Close-up of the two 1/4" inputs on the terminal cup. These inputs are used for connecting to an amplifier and for daisy-chaining.
To connect the speakers to an amplifier, use standard 1/4" speaker cables. Ensure your amplifier's impedance matches the speakers' 4 Ohm impedance for optimal performance and to prevent damage.
Daisy Chaining: The SA-155.2 speakers can be daisy-chained. Connect a 1/4" cable from the output of your amplifier to one of the 1/4" inputs on the first speaker. Then, connect a second 1/4" cable from the remaining 1/4" input on the first speaker to an input on the second speaker. This allows both speakers to receive signal from a single amplifier channel.
5. Operation
Once connected to a suitable amplifier, the SA-155.2 speakers are ready for operation. Ensure the amplifier is powered on and set to a low volume before increasing it to your desired listening level. These speakers are designed to handle 500 Watts RMS and 1000 Watts Peak power, providing robust sound output.
The dual 15-inch woofers with 50oz magnets and 2-inch voice coils, combined with two 2x5 tweeters, deliver a frequency response of 30Hz to 20kHz, ensuring clear and powerful audio across the full range.
6. Care and Maintenance
- Cleaning: Use a soft, dry cloth to clean the speaker cabinets. Avoid using abrasive cleaners or solvents that could damage the finish.
- Storage: When not in use, store speakers in a dry, temperature-controlled environment.
- Handling: Always use the integrated pocket handles when moving the speakers to prevent damage and ensure safe transport.
- Inspection: Periodically inspect speaker cables and connections for any signs of wear or damage. Replace faulty cables immediately.
7. Troubleshooting
- No Sound: Check all cable connections from the amplifier to the speakers. Ensure the amplifier is powered on and its volume is turned up. Verify that the audio source is functioning correctly.
- Distorted Sound: Reduce the volume level on your amplifier. Ensure the amplifier's power output and impedance match the speaker specifications. Check for damaged speaker cones or tweeters.
- Intermittent Sound: Inspect all cables for loose connections or damage. Ensure the amplifier is not overheating.
8. Technical Specifications
| Feature | Specification |
|---|---|
| Model Name | SA-155.2 |
| Speaker Type | Passive PA/DJ Speaker |
| Power Handling (RMS) | 500 Watts |
| Power Handling (Peak) | 1000 Watts |
| Impedance | 4 Ohms |
| Woofer Size | Dual 15 Inches (each with 50oz magnet, 2" voice coil) |
| Tweeter Size | Two 2x5 Tweeters |
| Frequency Response | 30Hz to 20kHz |
| Sensitivity | 96 dB |
| Connectivity | Wired (Two 1/4" inputs) |
| Cabinet Material | 5/8" Plywood Front Panel, Wood |
| Grill | Steel Grills over each speaker |
| Handles | Pocket Handles |
| Ports | Dual Ports |
| Dimensions (HxWxD) | 38" x 16" x 12" |
| Weight (per cabinet) | 51 lbs |
| UPC | 812451010015 |
9. Warranty Information
The Seismic Audio SA-155.2 speakers come with a one-year limited warranty. Please retain your proof of purchase for any warranty claims. For specific terms and conditions, refer to the warranty documentation provided with your product or contact customer support.
10. Customer Support
For further assistance, technical support, or warranty inquiries, please contact Seismic Audio Speakers Inc. customer service. Refer to the contact information provided on your product packaging or the official Seismic Audio website.