Electro-Harmonix 6550 Matched Quad: Powerful Sound Quality and Reliable Performance The Electro-Harmonix 6550 Matched Quad delivers powerful performance and a detailed tone essential for high-power amplifiers. These matched quad tubes are designed for long-lasting durability and stable performance, even under the most demanding conditions. Whether for studio recordings or live performances, the 6550 Matched Quad ensures reliable and consistent sound quality. Key Features: Matched Quad: The four tubes are precisely matched for consistent performance. Powerful Performance: Ideal for high-power amplifiers, delivering strong sound output. Detailed Tone: Provides clarity and depth across all frequencies. Reliability: Durable design for long-lasting performance. Technical Specifications: Type: 6550 Matched Quad Dimensions: 8 cm x 4 cm per tube Weight: 600g (per set of four) Voltage: 500V Current: 1A Lifespan: Long-lasting, perfect for high-demand applications The Electro-Harmonix 6550 Matched Quad is perfect for musicians and sound engineers who require reliable, high-quality performance.