The Emerson  Blender wiring has 1 volume, 1 master tone, and a Blender pot. In the neck position you can blend the bridge pickup in as much as you want. In the bridge position you can blend the neck pickup in as much as you want. In positions 2 and 4 you can have all three pickups on at once. The nicest part about it is the fact of it being so user friendly. Everything else seems to be hard to use on the fly.

Specifications

• 1: Emerson PREMIER PRO Volume Pot (Master Volume) [3/8" Split Shaft] 
• 1: Emerson PREMIER PRO Tone Pot (Master Tone) [3/8" Split Shaft] 
• 1: Emerson PREMIER PRO 250K Blender Pot [3/8" Split Shaft] 
• 1: 0.047uf Emerson Paper in Oil Capacitor *(0.022uf are used with 500K-Ohm Pots Option)* 
• 1: Volume Mod (Treble Bleed; Retains Clarity when rolling back volume knob) 
• 1: Prewired Jack 
• 1: Wiring Diagram

Control Layout 

• Master Volume 
• Master Tone 
• Blender Pot

Please note!
US Spec Emerson PREMIER PRO split shaft pots are made to fit USA Spec 24 spline push-on knobs.