BUILD your own Rack


Nearly two decades ago,


Inward Connections created the TLM-1 (Tube Limiter Module) for their Vac Rac modular processing system. The TLM-1 was highly favored by many of the world’s top recording engineers and when the modular Vac Rac was discontinued, the TLM-1 topology found life as a new standalone, dual-channel unit. Thus, the TSL series was born. The Inward Connections TSL-4 Vac Rac is the latest incarnation of this classic design. It adds new features without altering the sonic signature engineers have come to revere – Smooth limiting presented with the euphonic character and warmth of tubes. If you want to control the transients of vocals, guitars, bass or the mix bus, without tweaking a whole bunch of controls, the TSL-4 is exactly what you’ve been looking for. Inward Connections also offers the TSL-4V Vac Rac. The TSL-4V is the TSL-4 equipped with hand-selected and factory-installed NOS tubes. The TSL-4V is a special order item and subject to the availability of tubes required. Features per channel: 40-Detent Gain Makeup Control – variable control of 14dB of output gain 40-Detent Gain Reduction Control – variable control of up to 40dB of gain reduction Bypass Switch – engages or disengages the gain reduction element Output Switch – Assigns meters to Gain Reduction or Output Hi-Pass Filter Switch – engages 250Hz high pass filter within the gain reduction circuit Link Switch – Links opto cells of both channels for stereo operation Large 3"x3" Illuminated VU meter Zero trim to calibrate the meter in Limit mode Tubes used in both input channels: Input stage - 6072A, Output stage - 12BH7A Power Supply: Pure Class A high voltage tube design with AC Voltage selector Unit dimensions: 3 rack space. 5.25" Height, 19" Width, 11.5" Depth Rugged, well-ventilated, 3U steel chassis design Classic vintage look Transformer Balanced, Line Level, XLR inputs and outputs Specifications: Gain Reduction: up to 40db Input Impedance: >100k ohms Frequency Response: +/- 0.5 dB @ 20Hz to 20KHz Output Signal to Noise Ratio: -85dB THD + Noise: .015% @ 20Hz (0dB ref.) .085% @ 20KHz (0dB ref.) .15% @ 20Hz to 20KHz (+30dB ref.) Maximum Input Level: +20dB Maximum Output Level: +20dBm @ 600 ohms +34dBv @ 10K ohms Output Impedance: 600 ohms transformer balanced output