Originals – not today’s less desirable reproductions. When introduced in the 1960’s, they were immediately acclaimed for their smooth, natural compression characteristics. A unique tube-driven electro-optical attenuator system allows instantaneous gain reduction with no increase in harmonic distortion. The LA-2A is generally considered the second most sought after compressor in the pro audio world (The Fairchild 670 is the most sought after and we have a 670 as well). These particular compressors have been owned by Trutone since 1969, they were our first compressors!