TLA-100The Summit Audio TLA-100A Tube Leveling Amplifier is a classic design with a harmonious blend of old and new technologies, producing the incredibly warm and smooth sound of vacuum tubes in a compression device without the inherent disadvantages of older designs. Summit Audio has been making the TLA-100A for over 20 years and produces a sound that remains a much sought after quality that is used on literally thousands of records and in live sound venues across the world. The TLA-100A uses a soft-knee and program dependent transition characteristic and a transformerless signal path, resulting in a set-and-forget compressor that always sounds right with a minimum of knob fiddling.