Howard Dawson Audio
HRL-1 Ribbon Speaker Constructional Details

An extremely robust construction is employed in the HRL-1. A pair of substantial aluminium castings are used for the magnet housing and the front flange, the latter having a gold hammered finish. The replaceable insert is sandwiched between the two castings and serves a secondary function as a gasket, effectively sealing the ribbon against pressure variations in the main enclosure.
The small matching transformer (necessary to raise the low impedance of the ribbon element to a usable value such as 8 ohms) is mounted on a small glassfibre PCB on the rear of the unit's mounting flange; this PCB also carries the inch input receptacles. The "hot" end of the ribbon connects to the PCB while the "cold" end connects back to the transformer via the castings and the PCB's mounting studs.

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hand-crafted loudspeaker units for music lovers