The TJ Media TA-550 is a powerful multi-channel stereo mixing amplifier designed for commercial use, particularly in karaoke environments. It features a robust design with advanced digital echo stereo technology and comprehensive protection circuits.
Function Description:
The TA-550 amplifier is engineered to deliver high-quality audio output across four channels. It integrates microphone, music, and echo processing, allowing for precise control over each audio component. The amplifier's front panel provides extensive controls for individual microphone channels, music channels, echo effects, and a master section for overall sound adjustment. The rear panel offers various input and output terminals for connecting microphones, music sources, speakers, and other auxiliary devices.
Important Technical Specifications:
- Output Power: 120W x 4 channels at 4Ω (THD 1%, 1KHz), totaling 480W. This high output is achieved using Toshiba high-output transistors.
- Input Voltage: AC 220V / 50-60Hz.
- Power Consumption: 992W.
- Frequency Range: 20Hz ~ 20KHz.
- MIC Input Sensitivity: 10mV.
- A/B Music Input Sensitivity: 100mV.
- Signal to Noise Ratio: 90dB.
- Dimensions (Including Foots):
- Width: 420mm
- Depth: 300mm
- Height: 128mm
- Fuse: AC 250V / T8A (a spare fuse is located in the fuse box).
Usage Features:
- Multi-Channel Microphone Inputs: The amplifier features 2 stages with 4 microphone inputs, allowing for the combined use of wired and wireless microphones. Each microphone channel has an indicator light that illuminates when active, making it easy to monitor and adjust individual microphone volume and tone.
- Independent Channel Control: Separate controls are provided for microphone, music, and echo channels, enabling precise adjustment of volume, tone (low, mid, high), and effects for each. This allows for a nuanced mixing of sound elements to create a rich and powerful audio experience.
- Digital Echo Stereo: Incorporates digital echo stereo technology for faithful reproduction of original sound, enhancing the vocal performance with natural reverberation.
- Echo/Reverb Control: Dedicated controls for echo effects include ST/MO selector (mono/stereo), echo volume (VOL), panning (FADER), low and high tone adjustments (LOW, HI), repeat count (REPEAT), and delay time (DELAY).
- Master Volume Control: A convenient master volume allows for simultaneous adjustment of the overall volume and tone (low, mid, high) of the mixed microphone, echo, and music channels.
- Music Channel Controls: Music channels offer independent volume (VOL), balance (BAL), fader (front/rear speaker distribution), and tone adjustments (LOW, MID-LOW, MID-HI, HI).
- Speaker Connections: Supports connection of up to 4 speakers. It is important to note that speakers with an impedance below 8 ohms should not be used when connecting 4 speakers.
- Subwoofer Output: Includes a dedicated output for connecting to an external subwoofer amplifier or active subwoofer.
- Recording Output (REC): Allows for recording all sounds from the amplifier to an auxiliary device (DECK). A LINE output is also available to send the combined output to a subwoofer amplifier or other amplifiers.
- Score Input (MIC): Connects to the score input terminal of a karaoke machine.
- Music Input (MUSIC INPUT A/B): Connects to the audio output terminals of a karaoke machine or other auxiliary devices. It is recommended to match the color of the amplifier's terminals with the connecting cable's colors.
- Power Indicator (POWER LED) and Signal LED: The POWER LED indicates the ON/OFF status of the amplifier. The SIGNAL LED visually represents the amplifier's output volume, changing in brightness according to the sound level.
Maintenance Features:
- Over-Current and Speaker Short Protection: The TA-550 includes a built-in PROTECTION circuit to prevent damage to the amplifier from over-currents or speaker short circuits, ensuring durability and reliability.
- Grounding: The device requires proper grounding to prevent electric shock and ensure optimal performance, especially in commercial settings where multiple devices are interconnected. The manual specifies that the unit corresponds to Class 3 grounding construction.
- Safety Precautions: The manual provides detailed safety warnings and cautions regarding power cord handling, installation, ventilation, voltage requirements, handling of liquids and foreign objects, and proper use of the microphone to prevent damage, injury, fire, or electric shock.
- Troubleshooting Guide: A comprehensive troubleshooting section helps users diagnose and resolve common issues such as no power, no sound from speakers, microphone sound but no music, microphone sound but no echo, distorted sound, or low microphone output.
- Warranty and Service: The product comes with a 1-year free service warranty from the date of purchase. Users are advised to contact an authorized service center or dealer for repairs and to avoid opening the unit themselves, as this voids the warranty and the manufacturer's responsibility for damage.
- Quality Improvement: The manufacturer reserves the right to change product specifications and appearance without prior notice for continuous quality improvement.
To Next Page
Need help?
General