Yamaha SRX40A – The Yamaha SRX40A is a professional-grade active subwoofer designed for large venues that need high-output bass. Equipped with advanced DSP technology and a built-in amplifier, the SRX40A provides superb low-end reproduction and clear mid-bass frequencies. Ideal for sound systems, DJ performances, and live events, it ensures powerful, clear bass without distortion. Its rugged construction is built for touring and sound reinforcement, making it suitable for both indoor and outdoor events.