The RAM-20.352/K Speaker Adapter with 100mm and 130mm dimensions is a high-quality electronic component manufactured by ACV. It offers excellent audio quality and is compatible with a variety of speaker systems. It is constructed with durable components, including a nickel-plated stainless steel finish and heavy-duty ABS plastic housing. The adapter also includes four mounting holes and a gold-plated solder terminals. It is a versatile accessory that is compatible with most two-way, three-way and four-way speaker systems.