In line volume control

[bherron1985]

Need help with this one. I am using one 4 channel amp (2 ch. to speakers and bridged 2 ch. to sub). I would like to be able to turn the volume down to the sub only, when desired. The in line volume controls I’ve seen all use RCA connections; however, the output of the bridged channels are speaker wires. Any thoughts on how to introduce a volume control in line for the sub only? I’ll be using a Bluetooth receiver, which only has one female RCA output. Thanks in advance! 

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[youdoofus]

Need help with this one. I am using one 4 channel amp (2 ch. to speakers and bridged 2 ch. to sub). I would like to be able to turn the volume down to the sub only, when desired. The in line volume controls I’ve seen all use RCA connections; however, the output of the bridged channels are speaker wires. Any thoughts on how to introduce a volume control in line for the sub only? I’ll be using a Bluetooth receiver, which only has one female RCA output. Thanks in advance! 

welcome to the forum!

use a PAC LC-1 https://www.amazon.com/PAC-LC-1-Remote-Amplifier-Controller/dp/B0002J226O

rca in from the source, rca out to the amp, attenuate from the knob