Seismic Audio SA-MA4C 4-Channel 200W Powered PA Head Mixer User Manual

1. Introduction

Thank you for choosing the Seismic Audio SA-MA4C 4-Channel 200 Watt Powered PA Head Mixer. This mixer is designed to provide clear sound for various audio applications, from small venues to home studios. It features 4 input channels, built-in Bluetooth, USB/SD card playback, and adjustable effects. This manual provides detailed instructions for setup, operation, and maintenance to ensure optimal performance and longevity of your device.

2. Important Safety Instructions

• Read Instructions: Read all safety and operating instructions before using this product.
• Retain Instructions: Keep these instructions for future reference.
• Heed Warnings: Adhere to all warnings on the product and in the operating instructions.
• Follow Instructions: Follow all operating and usage instructions.
• Water and Moisture: Do not use this apparatus near water.
• Cleaning: Clean only with a dry cloth.
• Ventilation: Do not block any ventilation openings. Install in accordance with the manufacturer's instructions.
• Heat: Do not install near any heat sources such as radiators, heat registers, stoves, or other apparatus (including amplifiers) that produce heat.
• Power Cord: Protect the power cord from being walked on or pinched, particularly at plugs, convenience receptacles, and the point where they exit from the apparatus.
• Attachments: Only use attachments/accessories specified by the manufacturer.
• Servicing: Refer all servicing to qualified service personnel. Servicing is required when the apparatus has been damaged in any way.

3. Product Overview

The SA-MA4C is a compact yet powerful 4-channel powered PA head mixer. Below is an overview of its main components and controls.

3.1 Front Panel Controls and Inputs

Figure 1: Front panel of the SA-MA4C mixer, illustrating the layout of channels, master controls, and media player section.

Each of the 4 channels features:

• XLR Input: For microphones or other low-impedance sources.
• 1/4" TRS Input: For line-level instruments or other high-impedance sources.
• Bass Control: Adjusts the low-frequency response of the channel.
• Treble Control: Adjusts the high-frequency response of the channel.
• Level Control: Adjusts the input gain for the channel.
• Effects Control: Sends the channel signal to the built-in echo effect generator.

The Master section includes:

• Master Volume Control: Overall output level adjustment.
• 3-Band EQ: Equalization for the master output (Low, Mid, High).
• CD/TAPE Volume Control: Adjusts the input level for RCA L/R inputs.
• Digital Delay Controls: Time and Repeat adjustments for the echo effect.
• USB/SD Digital Player: Features USB port, SD card slot, and Bluetooth connectivity for media playback.

3.2 Rear Panel Connections

Figure 2: Rear panel of the SA-MA4C mixer, showing power input, speaker outputs, and RCA connections.

• Power Input: Connects to the AC power supply (120VAC 50/60Hz or 230VAC 50/60Hz).
• 4 Ohm Dual 1/4" Speaker Outputs: Connects to passive speakers. Ensure speakers have a minimum impedance of 4 ohms.
• RCA L/R Input: For connecting external audio sources like CD players or tape decks.
• RCA L/R Output: For sending the mixed signal to external recording devices or additional amplifiers.

4. Setup

1. Placement: Place the mixer on a stable, flat surface, ensuring adequate ventilation around the unit.
2. Power Off: Ensure the mixer's power switch is in the OFF position before making any connections.
3. Speaker Connection: Connect your passive speakers to the 4 Ohm Dual 1/4" Speaker Outputs on the rear panel. Ensure the total impedance of connected speakers is not less than 4 ohms.
4. Input Connections: Connect microphones to the XLR inputs and line-level instruments or devices to the 1/4" TRS inputs for each channel. For external audio sources like CD players, use the RCA L/R inputs.
5. Output Connections (Optional): If recording or connecting to additional amplification, use the RCA L/R outputs.
6. Power Connection: Connect the power cord to the mixer's power input and then to a suitable AC power outlet.
7. Initial Settings: Turn all channel Level controls and the Master Volume control to their minimum (fully counter-clockwise) positions before powering on.

5. Operating Instructions

1. Power On: Turn on the mixer's power switch.
2. Adjust Master Volume: Slowly increase the Master Volume control to a low listening level.
3. Adjust Channel Levels: For each active channel, slowly increase its Level control until the desired volume is achieved. Monitor the sound for any distortion.
4. Tone Adjustment: Use the Bass and Treble controls on each channel to shape the sound. The 3-Band EQ on the master channel can be used for overall tone adjustment.
5. Effects: To apply effects, increase the Effects control on the desired channel. Adjust the Digital Delay Time and Repeat controls in the master section to fine-tune the echo effect.

5.1 Bluetooth Connectivity

The SA-MA4C features built-in Bluetooth for wireless audio streaming.

1. Activate Bluetooth: On the USB/SD Digital Player section, select the Bluetooth mode. The display will indicate "Bluetooth" or a similar pairing status.
2. Pair Device: On your Bluetooth-enabled device (e.g., smartphone, tablet), search for available Bluetooth devices. Select "SA-MA4C" or a similar name from the list.
3. Play Audio: Once paired, you can play audio from your device, and it will be routed through the mixer. Adjust the CD/TAPE Volume control for the Bluetooth input level.

5.2 USB/SD Playback

Play audio files directly from a USB drive or SD card.

1. Insert Media: Insert a USB drive into the USB port or an SD card into the SD card slot on the digital player section.
2. Select Mode: The mixer should automatically detect the media and switch to USB or SD mode. If not, use the mode button on the digital player to select the correct source.
3. Playback: Use the controls on the digital player (Play/Pause, Next, Previous) to manage playback. Adjust the CD/TAPE Volume control for the USB/SD input level.

6. Maintenance

• Cleaning: Disconnect the power before cleaning. Use a soft, dry cloth to clean the exterior of the mixer. Do not use liquid cleaners or aerosols.
• Ventilation: Ensure ventilation openings remain clear of dust and debris.
• Storage: When not in use for extended periods, store the mixer in a cool, dry place, protected from dust and extreme temperatures.
• Fuse Replacement: The mixer uses a 6 Amp/250 Volt T1 Fuse. If the fuse needs replacement, ensure the mixer is unplugged and replace it with an identical type and rating. Refer to qualified service personnel if unsure.

7. Troubleshooting

8. Specifications

Figure 3: Dimensions of the SA-MA4C mixer.

9. Warranty and Support

Seismic Audio products are designed for durability and performance. For specific warranty details, please refer to the warranty card included with your purchase or visit the official Seismic Audio website. For technical support, troubleshooting assistance, or service inquiries, please contact Seismic Audio customer service through their official channels.

Website: www.seismicaudio.com