If you’ve recently acquired a or pulled one out of storage, you already know it’s a legendary piece of British engineering. Known for its "musical" EQ and robust build, this compact 4-bus mixer remains a favorite for project studios looking for that classic analog warmth.
Even without the official documentation, these fixes are well-known among Topaz users: Soundtracs Topaz 12 4 Manual
: Line-level only with unbalanced jack sockets; connecting only the Left input provides a mono signal. If you’ve recently acquired a or pulled one
The Topaz 12/4 uses (model PGF****). The manual gives a part number: PG Fader 10k lin 60mm travel. You can buy exact replacements from Audiox (Spain) or saved from old Soundcraft consoles. Without the manual, you might think any 10k fader works—wrong. The taper is critical. Use only P&G or ALPS K-series. The Topaz 12/4 uses (model PGF****)
You can route all your drum mics to Groups 1 and 2, then use just two faders to control the entire drum kit volume.
