LONGJOIN has a professional R&D team with over ten years experience in product development. From DSP process technology, traditional analog products to switchable level technology, research items cover all the audio products. Our technology advantages see our services for many famous international brand names. We can provide total solution to customers, concluding appearance design, electronic design, software design, metals design, plastic design, packaging design and so on. We also provide professional production advices at the earliest stage , such as design for manufacture (DFM), processing control, product test , after-sale services, product version upgrade. Below shows some of the product types we are working on:

Digital Processor

• Audio Signal Digital Processing
• Digital Effecter For PA Application
• Digital Feedback Eliminator
• Digital Effector of MI Application
• Digital EQ
• A/V Matrix

Professional Power- Amplifier

• Class D Power-Amplifier
• Switching Power Power-Amplifier
• Analog Power- Amplifier

Mixers

• 4Ch - 48Ch Mixers
• DJ Mixer
• Powered Mixer

Audio Processor

• Graphic EQ
• Limiter
• Exciter
• Signal Distributor
• Compressor
• Cross Over

Music Instrument

• Analog Guitar Power-Amplifier
• Digital Guitar Power-Amplifier
• Bass Power-Amplifier
• Keyboard Power-Amplifier

KTV Products

• Analog Karaoke Power Amplifier
• Digital Karaoke Power Amplifier
• Karaoke Effecter Module
• Analog Karaoke Pre-Amplifier
• Digital Karaoke Pre- Amplifier