
Steel Speaker is a wireless omnidirectional speaker
Its transmission line alignment boosts low frequency response acoustically
Made in Oregon, USA from steel, aluminum and maple

Raw Steel and Aluminum

Graphite Cerakote




Specifications
- Design: Mass-loaded transmission line (MLTL)
- Amplifier: Bridged mono TPA3118
- Inputs: Bluetooth 4.0, RCA
- Driver: Fountek FR58EX
- Dimensions (L x W x H): 3 x 4 x 15.5 in. (7.62 x 10.16 x 39.37 cm)
- Weight: 12 lbs. (5.5 kg)
Engineering
Steel Speaker is a mass-loaded transmission line that uses quarter-wave harmonics to extend the driver’s bass response.
A central divider a splits the enclosure into two halves, creating a folded 24″ transmission line.
The port b sits a few inches from the end of the line and the driver c sits at the middle. This positioning eliminates all harmonics other than the first, lowest harmonic, which is tuned to extend the bass response.
The hardwood ball d diffuses sound from the front of the driver in all directions. It also houses the Bluetooth antenna, since it is the only part of the Steel Speaker that does not block RF.