How to use TV volume to increase sound through my Sony sound system Toshiba 32L5400

[saikumar.rec]

Hello,
I just want to know how to increase my Sony sound system volume when connected to the rca audio output port .When I increase the sound the TV speakers sound will increase not through my sound systems .

Some TV have this option by keeping the sound system volume to high and using TV volume to increase or decrease while watching.

But for in my case my TV speakers are on and sound system also on .

Is that sound system getting the max output from the TV when connect to external device i.e sony Dz 145.

 

[americanaudiophile]

Your TV only has fixed level outputs (analog and optical digital).
Does the Sony play loud enough when you play a DVD?
If not then that is the limit of the Sony and boosting the output of the TV can't help.
If it does play louder with the DVD then you would try on of these
https/www.amazon.com/STEREO-LINE-PRE-AMPLIFIER-15DB-12VDC/dp/B00I01ZNUS