Company Advantages1. The physical structure of power subwoofer is pretty unique with pa system power amp .
2. power subwoofer has intelligence functions of pa system power amp , with characteristics of basic audio amplifier .
3. Guangzhou KAIXU Audio Equipment Co., Ltd has the advanced product testing method and equipment.




Product Details
NO.1
High Quality Capacitance
The power amplifier uses a large capacity to ensure sufficient energy during high power operation,high quality and long life.
NO.2
TOSHIBA Powerful Amplifier Tubes
High Performance and high power amplifer tube makes the voice vibrant and dynamic.
NO.3
Pure Aluminum Heat Sink
Large aluminum heat sink can effectively transfer the heat generated by the power amplifier in time,and the heat dissipation is fast and the effect is good.
NO.4
Excellent Cooling Fan
Ensure that the heat is dissipated and that the amplifier is cooled to prevent if from overheating.
Product Feature

PA1.3 Series is a high power, clear sound and low bass booster for subs.A new class AB desigin,through a bridge mode.lift GND even it was bridge.
Stable performance /precise workmanship. specialized system protection circuit, comprehensive safe,reliable & accurate such as short circuit protect,over load protect,DC protect(inrush audio peak) limiter soft start,High temp protect,HF protect, Back-EMF protect etc.
Product Parameter
Model | PA1.3 |
damping factor | ≥620 |
frequency response | 20HZ-20KHZ,±0.1dB |
THD+N | ≤0.01%,1/3Rate Power@8Ω1KHZ |
IMD | ≤0.01%,1/3Rate Power@8Ω |
Input sensitivity | 0.775V\1.0V\1.55V |
Input Impedance | 10KΩ/20KΩ(Unbalance/Balance) |
input CMRR | ≤75dB |
Cross talk | ≤70dB |
LED Indicator | SIGNAL,PROTECT,ACTIVE,CLIP/LIMITING |
Main power supply | 230V@50HZ,FUSE:T25A |
power consumption | 4400W |
q’ty20”,40”,40”HC(pcs) | 400/800/970 |
Certificate
Packing & Shipping
We support both OEM & ODM packaging. Our normally delivery method are by the sea, by air, by international express (DHL, UPS, TNT, FedEx)

Company Features1. To many consumers in many countries, KaiXu is a number one brand of power subwoofer.
2. Guangzhou KAIXU Audio Equipment Co., Ltd has strong financial, professional and technical strength.
3. The goal of the company is to develop a strong key customers base in the coming years. By doing this, we hope to become a key player in this industry. Call! We make sure that all our orders meet the highest standards and are delivered on time. This dedication has helped us maintain our reputation of delivering quality products within due time. No matter how big or small the project, we have always upheld our promise to customers. Call! We want to have satisfied customers who trust our products for a long time. We know that the image and the name of a brand acquire the real value only at the moment when good work can be seen behind them. Call! We are honest and straightforward. We say what needs to be said and hold ourselves accountable. We earn the trust and confidence of others. Our integrity defines and leads us. Call!