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Calum Audio Ltd



Regular price £640.00 GBP
Regular price Sale price £640.00 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

In the 15+ years the SBH has been around for, the SBH has gained a lot of popularity. A 3m long folded horn in a narrow and tall form factor, this is a great place to start for a cheap FLH sub section.

Also a surprisingly easy build, this is a good way to get into building FLHs.

Specified as -6dB at 30hz - 126hz.

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 dedicated subwoofer cabinet. As with all horn loaded subwoofers, it benefits greatly from being used in multiples. We suggest this design really comes alive when you use 3+ together.

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 a gasket
  • 4 metal bar handles with gaskets
  • 4 swivel casters, with insert nuts pre-installed

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 RCF LF18N401 as a good standard option. This is what is in the Standard Loaded cabinet.

The Void V18-1000 is a great premium option. This is what is in the Premium Loaded cabinet.

Physical Specifications

  • 1200mm x 536mm x 950mm HxWxD (without casters)
  • 6 cutout handles
  • 4 metal bar handles
  • 4 swivel casters
  • 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 SBH design is credited to Startec of Quad Acoustics from France. I cannot find the original release of this design to link to, if you know where this is please let me know.

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