Tube Mid-Range Equalizer Chassis Kit

what you get

  • true-to-the-original authentic chassis kits
  • made & engineered in Germany
  • Hammer finish powder coated back chassis
  • Original style hammer finish powder coated filter enclosure
  • Powder coated front panel
  • all cut outs for every single component: no cutting, drilling or filing
  • Illustrated wiring layout
  • detailed Bill Of Materials

249.00  / 296.31  incl. 19% VAT

Available on backorder

Delivery time: 4-7 work days within Germany*


This legendary Midrange Tube Equalizer is the perfect companion to the Tube Program EQ! 3 bands of cutting & boosting ranging from 200Hz to 7Khz using the same passive filter design as its bigger brother followed by a tube make up amp.
This box sounds so smooth and musical it’s simply ridiculous!

After I finished my first Tube Program Equalizer, I knew I had to get the midrange tube EQ, too. Well, and after I built my first midrange tube EQ and tried it in a mix, it was like “damn – I need another one!”

Just like the Tube Program Equalizer this chassis kit was designed following the original specs of a vintage unit, including all holes and cutouts for every single component needed, plus the filter enclosure to be mounted to the back of the main chassis.

Of course a BOM and the wiring layout are included!


Complete bill of materials

Handdrawn wiring layout

Additional information

Weight 2.8 kg
Dimensions 9.0 × 48.3 × 20.0 cm
availble adapters


available adapters

Sowter Input & Interstage (the same adapter as used for the input & interstage transformers for the Tube Program Equalizer – also fits input AND output of the MidRange Tube EQ)

required skill level

★★★✩✩ (amp circuit even simpler than the Tube Program EQ, slightly more "complex" filter section, wiring layout included but no step by step guide yet)

additional costs for required components

approx. $ 580.00 USD / EUR 515.00 (BOM version)

2 reviews for Tube Mid-Range Equalizer Chassis Kit

  1. greg (verified owner)

    Amazing, quality constructed chassis both in fit and form. Even more fun to build! Thanks Martin! Gregory Smith, CA, USA

  2. caderoberts777

    I have a pair of these built as well. Everything to be expected from Martin and his offerings. Perfect! Scot Tulsa Ok

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