AU317 add subwoofers

[HeilYeah]

Have an au317 driving 4 ohm speakers. Sounds great from middle low to high.

Want to add 2 subwoofers to my setup to feel the low bass more.
Each passive subwoofer I already have is dual 4ohm voice coil and therefore can be wired in parralel or series for a 2 ohm or 8 ohm final load for each subwoofer.

Not sure what the sansui information on the back of the amp means about 8 ohm speakers. I am running 4 ohm load now on A speakers selector switch.

I plan on wiring each dual voice coil sub to 2 ohms and adding a low pass filter inline.

So, if I add the 2 ohm subwoofers to the B speaker outputs on the amp, I assume they would parrallel with the main speakers?? And the total ohms would now be too low for the amp?

But, if I run the subwwofers on 2 ohms and connect them in series to my main speakers on channel A, that would now be 6 ohms and should work?
The wires would go from plus on the amp A output to plus on the main speaker. Then from minus on main speaker to plus on the subwoofer with a low pass filter in the line. Then from minus on the subwoofer back to minus on the Speaker out A on the amp for a total load of 6 ohms?

Does this make sense as I don't think I really understand the Speaker A/B concept on the Sansui amp.

 

[Grenadeslio]

Have an au317 driving 4 ohm speakers. Sounds great from middle low to high.

Want to add 2 subwoofers to my setup to feel the low bass more.
Each passive subwoofer I already have is dual 4ohm voice coil and therefore can be wired in parralel or series for a 2 ohm or 8 ohm final load for each subwoofer.

Not sure what the sansui information on the back of the amp means about 8 ohm speakers. I am running 4 ohm load now on A speakers selector switch.

I plan on wiring each dual voice coil sub to 2 ohms and adding a low pass filter inline.

So, if I add the 2 ohm subwoofers to the B speaker outputs on the amp, I assume they would parrallel with the main speakers?? And the total ohms would now be too low for the amp?

But, if I run the subwwofers on 2 ohms and connect them in series to my main speakers on channel A, that would now be 6 ohms and should work?
The wires would go from plus on the amp A output to plus on the main speaker. Then from minus on main speaker to plus on the subwoofer with a low pass filter in the line. Then from minus on the subwoofer back to minus on the Speaker out A on the amp for a total load of 6 ohms?

Does this make sense as I don't think I really understand the Speaker A/B concept on the Sansui amp.

my suggestion would be to add a dedicated amplifier with gain controls for the subs, this would allow volume balancing between the subs and mains, otherwise you're likely to have too much or too little bass. Just need a pair of Y adapters connected between the pre out and main in leaving the other end of the Y's to connect the second amp, easy peasy.

might I suggest a pro amp, they're often rated to 2ohm and usually have gain controls, Crown makes some very affordable amps that would be perfect for your setup.

 

[HeilYeah]

Problem solved. Thnks for the sugesstion.
Sounds excellent!