Who remembers the Dahlquist DQ-10's?

I remember that the local high-end store in Ann Arbor (college days), Mich. featured the Polk 10, DCM Time Window, and Dahlquist DQ-10.  I wasn't familiar with any of those brands prior to that first visit.  All three made an impression, but the DQ-10 was the one that lust worthy.  It was also furthest from my virtually non-existent, college student gear budget.

Email,

I thought Harmony House was on the West Side, near Lincoln Center. These are long damaged brain cells, but I thought that there was also a Harvey’s Electronics nearby. Lyric HiFi and one or two other places were on the Upper East Side, IIRC.

Was Tumultes the place with a model train that ran around the room on tracks near the ceiling?