Sub Crossover
jmiah22
Posts: 2
I have the 5 piece polk RM10 speaker set with a PSW404 subwoofer. These are connected to a Yamaha RX-V659 Receiver. I have the two main channel speakers connected through the back of the subwoofer using the line level inputs. How do I know where to set the subwoofer crossover level? Currently when I play 100-5 Hz sweep test tone I hear a "bump" when the sound switches from the front speakers to the subwoofer. Any advice would be helpful!
Post edited by jmiah22 on
Comments
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The way you've hooked it up you have to use the subs own crossover--on the back. In order to do this it would help to know what the supposed frequency drop off on the low end is on the Polk satellites, you'd probably want to set it at about that frequency so there is no hole between your sats and sub? The lower you can set the sub, i.e., the closer to 80hz the less directional it will be.
cnhCurrently orbiting Bowie's Blackstar.!
Polk Lsi-7s, Def Tech 8" sub, HK 3490, HK HD 990 (CDP/DAC), AKG Q701s
[sig. changed on a monthly basis as I rotate in and out of my stash] -
Well maybe I should provide a little more information. I connected my front channel speakers that way because the instructions with my PSw404 recommended it. In the receiver set up I have all speakers (I have a 7.1 system) set to small, and the front channel speakers set to large and the subwoofer set to none. According to Polks specifications for the RM10 set of 5 is:
Overall Frequency
Response 95 Hz - 24kHz
Lower -3dB Limit 130Hz
Upper -3dB Limit 20kHz
So would the the correct crossover be around 95 Hz? I am ready to shove the whole idea of connecting the subwoofer the way I have it, it is a real PITB to have to keep climbing under the desk to get to the back of my subwoofer!! -
The way you've hooked it up you have to use the subs own crossover--on the back. In order to do this it would help to know what the supposed frequency drop off on the low end is on the Polk satellites, you'd probably want to set it at about that frequency so there is no hole between your sats and sub? The lower you can set the sub, i.e., the closer to 80hz the less directional it will be.
cnh
The RM7's have a bottom of about 130/140 at -3db. So I assume your sats are similar. What I would do is start at that frequency and work my way down from it and see how it sounds to you. You're going to have to use your ears on this one because it is possible to set the sub a bit lower than the bottom end in some cases. Do not go lower than 80hz your speakers are not equipped for that. Probably somewhere around 100 might be OK? I'm just guessing.
cnhCurrently orbiting Bowie's Blackstar.!
Polk Lsi-7s, Def Tech 8" sub, HK 3490, HK HD 990 (CDP/DAC), AKG Q701s
[sig. changed on a monthly basis as I rotate in and out of my stash] -
Hi j -
You should have your sub connected to the receiver via a subwoofer cable w/ RCA connectors. One end goes in the receiver's sub out ouput and the other into your sub's LFE input. Your front left and right speakers SHOULD NOT be connected to the sub. They should be connected directly from the L and R front speaker binding posts on ther reciever.
I just read the Manual for your RM10 5 Pack system and it says nada about connecting any speakers through a sub.
After you make the correct connections, using your receiver's remote, set the sub crossover ON YOUR RECEIVER to 140Hz and the cross on the sub to max (which may also be 140Hz). Then, using your remote, gradualy decrease the cross (but don't go lower than 95Hz) and see where it sounds the best to you. Then, if your sub has a phase control, experiment with that until you get what sounds best to you. Often, changing the phase makes no difference, so don't worry if that happens.
Have fun!!!
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Home Theater 32"LG LCD; Comcast; 7.1 Onkyo 805; Fronts: Polk M50s; Center: Polk CS2; Sides: Polk M40s; Rear: B&W LM1s; Subs: (2) Sony 12" x 100w; Samsung 1500BDP; Toshiba A-2 HD-DVDP.
PC stereo: Viper custom PC: Windows XP; ASIO4ALL; JRiver Jukebox> Pop Pulse USB to S/PDIF conv> Monarchy DIP > Musiland MD10 DAC > Parasound 2100 pre> Aragon 4004 MKII amp> Dali Ikon6 towers; Sunfire True Sub; PSA Duet, Ultimate outlet and Noise Harvestors. -
Subwoofer crossover levels should be set at 250 hertz or higher, and anyone who knows anything will set it there.
POST#5:D -
Cresend did you really want to say 250Hz?? That just seems very high for a sub and I think would be working it very hard. I agree with the RM10 that you would want to go higher than the recommended THX of 80Hz but this just seems to be too high.
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Surprised he didn't add another digit.Michael
In the beginning, all knowledge was new!
NORTH of 60° -
Surprised he didn't add another digit.
Come on man give me some credit! I might use a 4-digit low pass crossover point for my subs, but I would never go higher than 2K.
Post #?:) -
What????? anybody that knows something will set it at 60hz-110hz sub = subsonic the part of the audio spectrum we feel more than hear 30hz and underCRESCENDOPOWER wrote: »Subwoofer crossover levels should be set at 250 hertz or higher, and anyone who knows anything will set it there.
POST#5:D -
I had the RM10 5.1 system, back when they used to include a sub., it was the one in the rm6750 set now. If you're listening to music, leave it wired the way it is, AKA 'the Polk way'. IF you're using it for HT/ gaming, then wire it the conventioal way-LFE out to sub.
The reason for the 'Polk' method, I believe, is get more base out the front L/R, a better blending so to speak. That's just my theory.
And as far as Crescendo goes, put him on IGNORE!!! He's just trolling.I refuse to argue with idiots, because people can't tell the DIFFERENCE!
