TL Audio EQ-5013 stereo valve EQ

The 5013 is a dual‑channel, 2U parametric equaliser. Each channel provides four bands of fully parametric equalisation. The Input gain control has a ±20dB range, with an orange Drive LED and a red Peak LED to provide basic metering. The Drive LED provides an indication of how much valve colouration is being added.
Each channel contains a dual‑triode valve gain stage, which directly precedes the solid‑state equaliser. Varying the input gain setting affects the degree of valve drive, enabling you to introduce a controlled degree of tube coloration.
The parametric EQ comprises four fully parametric sections with overlapping frequency ranges. Band one covers 30Hz to 1kHz, band two 100Hz to 3kHz, band three 1kHz to 12kHz and band four 3kHz to 20kHz. All have a ±15dB gain range, and the filter’s Q can be varied from 0.5 to 5.