Hi I am new to Polk Community but I am learning all the way. I am a self confessed tweaker and always looking for ways to improve speaker performance. I sent this email to Polk and I have not received any replies yet. Maybe any member can help me with this...
Dear Polk Audio,
I am running RTi A3 as my fronts and PSW 505 subwoofer with an Onkyo TX-SR605 AVR. As usual, it seems on your website I am confused with the issue of subwoofer connection. The Polk recommended way certainly seems to produce better bass in my system. I connected the front speakers and subwoofer via parallel connection (figure 7 in your PSW 505 documentation – I did it to reduce the speaker wire and keep things looking neat) to each speaker. However, I have a question which was raised by Onkyo.
Please see excerpt below:
The subwoofer "pre out" of the receiver is using a filter.
If you need full band, then connect the subwoofer to front speaker outputs left/right.
Only possible if the subwoofer has the possibility? If the subwoofer has the possibility, in this case switch subwoofer to "OFF" at the receiver menu.
If you use the front speaker outputs for the subwoofer, please attention.
Important info !!!
General our receiver can work with impedance from 4 ohm per channel.
Impedance lower is not allowed.
If you use two loudspeakers directly per channel, please give attention of the entire impedance, that this is not lower than 4 ohm!
For example, if you use two 4 ohm speakers per channel is the entire impedance 2 ohm. That is not possible to use!!!
If you use together a 4 ohm and 8 ohm speaker per channel, then is the entire impedance approximately from 3 ohm.
That is not possible to use!!!
If you use two 8 ohm speakers per channel is the entire impedance 4 ohm. You can use this.
In the case, if you use a active subwoofer about the “subwoofer pre out" of the av-receiver:
1. Turn the volume at the subwoofer to maximum.
2. Turn the crossover frequency at the subwoofer to the highest frequency.
What are your recommendations in this case? What does the impedance issue become or does this not mean anything and will not compromise the AVR?