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. 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.

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 100Hz 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

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