It should also be noted that this multi-voltage parameter test procedure includes heating the voice coil between sweeps for progressively longer periods to simulate operating temperatures at that voltage level (raising the temperature to the first and second time constants). I commenced testing the Dayton Audio DMA80 full-range using the LinearX LMS analyzer and VIBox to create both voltage and admittance (current) curves with the driver clamped to a rigid test fixture in free-air at 0.3V, 1V, 3V, and 6V. Tinsel leads connect on one side of the cone to a pair of solderable terminals.įigure 4: Cone excursion curves for the 15 V curves shown in Figure 2. Other features include a large copper cap shorting ring (Faraday Shield) that lowers distortion and extends the high-frequency SPL profile. Driving the assembly is a 1” aluminum vented (five vents below the spider mounting shelf and eight smaller vents above it) former wound with two layers of round copper wire. Motive force for the cone assembly is supplied by a neodymium slug-type motor with an additional bucking magnet to focus flux into the gap area.

The DMA80 cone assembly consists of a black anodized aluminum cone, with a 26 mm diameter convex aluminum dust cap (directly coupled to the voice coil former), suspended with NBR and a 45 mm diameter treated cloth surround spider (damper) for compliance.

This frame is very open to reduce reflections back into the cone and also has a very generous mounting flange making multiple driver arrays cosmetically attractive and compact. Table 1: Comparison data for the Dayton Audio DMA80 3.0” full-range transducer.Īll five models have pretty much the same feature set starting with a proprietary 12-spoke injection-molded frame.

Dayton full range speakers