It is a four piece design that uses the transformer itself as a structural member and is configured so the transformer connections are readily accessible without removing the whole assembly from the chassis.
Lundahl Metal Housing, LL1620-housing
Lundahl Metal Housing, LL1638-housing
Dune HD SmartBox 4K Mediaplayer
Lundahl Amorphous Core Filament current choke, LL1694AM
SB Acoustics 6.5" Satori midrange 8Ohm, MR16P-8