Active tone control with low impedance blend ("panpot") Buffered Input Bass and Treble control - model TBIBT
TBIBT which is a dual buffer and 2-Band EQ. You can now use an AGDB/918-2 Adjustable Gain Dual Buffer and a NTBT/918 2-Band EQ or a NTMB+F 3-Band EQ in less space.