SPL Kultube 2049 - extremely versatile stereo compressor, user optimization of attack and release times, adjustable tube saturation with output level adjustment, selectable soft or hard knee characteristics, unique decompression mode, large VU meter displays gain reduction or (mono summed) output level, switchable side-chain inputs on the front panel, slave mode for multi-channel operation. Options: 24/96 AD/DA converter, Lundahl input and output transformers.