This steampunk/dieselpunk DJ rig was a soft mod of a Numark CD-Mix 2, we use this at our events frequently.
While much of the device is contemporary and simply painted or altered to get a more vintage/antique look, some of the more dramatic pieces are actual vintage and antique pieces.
The monitor horn - being the large black phonogram horn, was estimated to be from the turn of the century.
The smaller, micro-phone horn (brass colored) is actually a 1920s Ford car horn.
The transformer housing is made entirely out of a 1930s heater. The fan was removed and placed on the outside to cool the transformer. A 1940s barrel switch was used as the on/off switch.