Handcrafted Labs Thermos Equalizer

Handcrafted Labs

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Product Code: 3607
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The Handcrafted Labs Thermos Equalizer is a 4-Band Parametric Equalizer inspired by the Barry Porter type EQ with a number of exclusive added design features, top class input and output transformers.

Each band has a Boost/Bypass/Attenuation switch and a multiplier switch to double the frequency selected (divider for High Band) as well as switchable Q and 9 dB of either boost or attenuation in 24 steps switch. Center section incorporates High Pass filter with adjustable frequencies and slope (six fixed frequencies and 12dB/24dB to octave curve selector) and full Mid-Side coder/decoder with M-S solo buttons. The frequency Response measured with all EQ bands ON set flat, 10Hz to 100kHz +0.2/-3dB.

The Handcrafted Labs Thermos is incredibly surgical yet very musical and transparent, you will not want to let go from your rack.

Special Note: Two recent updates to the Thermos (as of 2023), put M/S mode on a single button, and there are no longer separate outputs for the Transformer and Transformerless outs. They utilize the same outputs and you can switch between transformer and transformerless via a button on the front panel! M-S circuit operates on transformers. When transformerless output is engaged, the Thermos will only operate in stereo mode.

 

Handcrafted Labs Thermos Equalizer Specifications

  • Input Impedance: 24 Оhm
  • Output Impedance: 600 Оhm (transformer) / 500 Оhm (transformerless)
  • Nominal Level: +4 dBu
  • Maximum Level: +22 dBu
  • M/S Coder Circuitry: Transformer based
  • Frequency Response: 10 Hz…75 kHz. +/- 1 dBu
  • Signal to Noise: -91dBu
  • Harmonic Distortion at 1K on +16 dBu: less then 0.1%
  • Power/Voltage: 115/230V 50-60Hz

Handcrafted Labs Thermos Equalizer Includes

  • Thermos Equalizer
  • IEC Power Cable
  • Manual/Warranty Information

1 Review Hide Reviews Show Reviews

  • 5
    Mastering EQ
    HCL Thermos

    This mastering EQ is amazing! Mid-Side and ability to solo each each side is great! All pots are stepped and is easy for recalling. I have this, their Varis Vari-Mu mastering compressor as well as their Solution compressor. I’m’ planning on buying their entire product line up as I’m so impressed with the quality build and sound for the price point. I also love the option of coming out either with transformers or without.

What We Think

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The Handcrafted Labs Thermos is one of those EQs that feels ready for just about anything you throw at it. While working with it in the studio, it quickly proved itself as a true jack-of-all-trades — equally comfortable in tracking, mixing, or mastering situations. Whether running it in mono, dual mono, stereo, or mid/side, the Thermos never feels out of place and always delivers a refined, musical result. Sonically, it has a natural, full-range character with a smoothness that gently sweetens the audio without drawing attention to itself. The four-band layout — low, low-mid, high-mid, and high — offers a wide selection of overlapping frequencies, adjustable bandwidth, and precise boost or cut control, making it easy to shape tracks exactly the way you want. We especially enjoyed using the mid/side mode for subtle enhancements on stereo sources, drum overheads and room mics, and even on the mix bus during mixing or mastering. It’s intuitive, flexible, and sounds great across the board. Handcrafted Labs really nailed the balance of power and musicality with the Thermos, and it’s a piece that earns its place in a serious studio.

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