JBL 4312G 3-Way Studio Monitors (pair) – Upscale Audio
JBL 4312 B Mk II... - High End Audio For The Passionates | Facebook
JBL 4312 MKII Marcus Miller - YouTube
JBL 4312 A control monitors Black with White lettering | Reverb
Vintage pair of JBL 4312 Control Monitor speakers | Reverb
JBL 4312MkII — Some International
JBL 4312 - JBL 4312 was a respected nearfeild monitor in it's time.. mebbe worth a look in the free-ad's?
JBL 4312 // Studio Control Monitor / Custom Grilles – AURAL HiFi
4312mk2 - JBL 4312mk2 - Audiofanzine
Just picked up a set of super clean JBL 4312 Control Monitors to replace my Marantz Imperial 7s. The Sansui 881 powers them quite well! : r/vintageaudio