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Calum Audio Ltd



Regular price £495.00 GBP
Regular price Sale price £495.00 GBP
Sale Sold out
VAT included for the UK, no taxes charged for EU or US customers. You may be liable for import taxes, contact us if you're unsure. Shipping calculated at checkout.
Build Format

One of the classic midtops, re-worked and overbuilt for longevity. The well loved MT121 has been given a fresh phsyical spec, now built entirely in 18mm material for maximum toughness. We know your cabs take a beating, so be confident that your investment will last with our extra tough version.

The cabinet offers a standard trapezoidal midtop format, for a horn loaded 12" and compression driver combo.

Expect a -6db point around 80hz depending on what driver you use.

These cabinets / kits are built to order, please allow for a 8-10 week lead time.

If you're purchasing a flatpack kit, please be sure to check the difficulty levels and advice in the dropdown sections below.

Features and Applications

This is a midtop cabinet. It offers horizontally arrayable MF-HF in a standard physical format. We recommend you run it from at least 90hz upwards.

Flatpack kits include

  • All panels, cut from 18mm Birch plywood
  • All the screws you need
  • All the bolts and insert nuts you need
  • Gasket tape for the access hatch
  • Wadding
  • A pre-wired NL4 speakon dish, with gasket
  • A Faital Pro LTH142 horn
  • 4 metal bar handles with gaskets

Flatpack kit build difficulty

Expert. Cabinet building experience is necessary to be able to complete this build successfully. Reasonable build complexity, lots of individual parts potentially including multiple subassemblies. The order of assembly requires careful planning; there is only one way to build the kit. You need a drill / impact driver and glue. You will likely find clamps and a nail gun would be useful as well. Please do not order expert level kits if you are not confident you’ll be able to complete the build.

Acoustic Specifications

Exact acoustic specifications change depending on what driver you put in this cabinet.

We recommend the B&C 12NDL76 + BMS 4554 on the Faital Pro LTH142 as a good standard option. This is what is in the Standard Loaded cabinet.

For greater power handling and HF output, we suggest the B&C 12NDL76 + Faital Pro HF146 + Faital Pro LTH142. This is what is in the Premium Loaded cabinet.

Physical Specifications

  • 798mm x 576mm x 693mm HxWxD
  • 2 cutout handles
  • 4 metal bar handles
  • Dual NL4 speakon
  • 18mm Birch plywood used throughout - 100% NON Russian plywood is used throughout our products, all timber can be traced back to the mill of origin.


UK Shipping

This cabinet is available for purchase through this website for shipping within the UK.

EU Shipping

There are a growing number of countries that can purchase this cabinet directly with shipping via this webshop. We are happy to quote for shipping to anywhere in the EU, some countries are just a little more challenging than others, so require a manual quote to be generated. If you need a manual quote then please get in touch with us.

Please be aware that you may be liable for import taxes and duties upon importing this item. If you have any questions, or your country isn't listed, please to get in touch.

Global Shipping

We are happy to ship this cabinet globally, please contact us for a shipping quote.


The MT122 plan is credited to Rog Mogale, the MT121 is an evolution of that design. The original plan and design credit are given to this website here.

I assume no credit for my work here, all I've done is change the material thickness.

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