Dahlquist 10-UP

Little is documented about the Dahlquist 10-UP. Almost everything that survives is a classified ad in Audio (November 1982, p.82; December 1982, p.79). The ads list a "DAHLQUIST DQ-10 UP-DATE" - a name that appears to correspond to this model. It was sold as a pair of update kits for the DQ-10 loudspeaker:

DRT-1 ribbon tweeter kit — $249.00
PRC-1 polypropylene capacitor kit — $169.00

Past those listings, the record is empty. The documentation on hand has no specifications, production dates or installation details for the 10-UP. The exact nature of the update is unknown, including what the DRT-1 replaced and how the capacitor kit reworked the crossover. The ads do show that Dahlquist was offering a way to upgrade the DQ-10 in the early 1980s, and that the tweeter kit was the more expensive half of the pair.