Loud pop on transducer switch

[roughshawd]

First question... Happy New year! Happy Valentine's Day and Happy Easter in case I miss...

What size snap capacitor should I use on 4.7 ohm transducers to stop the spike when I switch a Baxandall tone board on and off?

 

[Martaine2005]

What transducers on a tone control board?.
Show us what you have.
Also, what’s a snap capacitor?. Do you mean a snap in?

 

[Alec_t]

What power supply do you have? How are you switching the board on/off? Are you switching just the audio channel, or just the supply, or both?