CAD-280SA V12

About the CAD-280SA V12

The Cary Audio Design CAD-280SA V12 is a two‑channel, push‑pull tube power amplifier that combines **class‑A triode** and **balanced push‑pull ultralinear** operation. It is specified to deliver **50 watts per channel in triode mode** and **100 watts per channel in ultralinear mode**, with a **frequency response of 20Hz–23kHz ±1dB at full power**. The output stage uses **twelve EL34 output tubes** in fixed‑bias topology, driven by **two SV83/EL84 driver tubes** and **two 6922 input tubes**, and can accept several compatible output tube types if desired. Inputs consist of **switch‑selectable RCA and XLR** connectors, and the rear panel provides **three five‑way binding posts** for 4Ω and 8Ω speaker taps plus ground. The CAD-280SA V12 operates in pure class A in both triode and ultralinear modes, allowing **on‑the‑fly switching between triode and ultralinear (and intermediate combinations) via chassis‑mounted toggle switches** for each tube pair at moderate listening levels. Its specified **signal‑to‑noise ratio is 84dB below rated output**, with **power consumption of 420W in operation and 10W in standby**. The chassis measures **12.5" W × 9" H × 20" D**, weighs **85 lb**, and is finished in **clear‑coat over Jaguar Carnival Red** with a **machined black‑anodized aluminum front panel**. Sonically, the design is intended to combine the **midrange character of a low‑power single‑ended triode amplifier with the dynamic capability and control of a push‑pull design**, yielding a warm, detailed presentation with spacious highs and solid bass when properly matched to loudspeakers.