Please help

dwnopep97

I currently running a Yamaha RxV1 with speaker size set to small for all channels. According to the manual the receiver cuts the bass off at 90hz. What I am wondering is that my bass seems a little flat. Not very punchy, but sometimes it will be overwhelming. I am running the Polk Audio PSW-650. Does anyone else have this problem or know how to fix it. Should I not be running th cut off at 90?

Frank Z

Have you calibrated your system with an SPL meter yet?

Dr. Spec

Look for and disable all:

bass peak limiters
LFE Channel Level controls
DD dynamic compression circuits in AVR and DVD player

fireshoes

Also Yamaha's have a bass extension mode that creates a hump at 50hz and then has a rapid rolloff "to prevent damage to your sub" aka it screws up your bass all the way around.

dwnopep97

Also one other question: Since my receiver is sending a filtered signal through the subwoofer out would i be just as well off to just plug the calbe into the LFE input on the sub or should i stay with rca line level?

Dr. Spec

In my best Matt Damon Ocean's 11 voice: "Well, yeah".

If you are NOT plugged into the LFE jack, you are double filtering the signal (technically known as cascading the filters), and this could also be a strong contributing factor to bad bass.

Doc

dwnopep97

When I am running the subwoofer out on the receiver to the rca inputs on the sub and the subs crossover is at full bandwidth would i still be cascading the crossover frequencies? It seems with the sub connected to the LFE input the sub need desperately turned up, why?

dwnopep97

OK heres the way I have it setup now, tell me if I am going in the RIGHT direction! The Yamaha receiver speaker size is all set to small. That also means that anything below 90hz is going to the subwoofer out. I am running the subwoofer out to the LFE input on the PSW-650. The volume setting on the sub it set to 7 and it still seems to be missing some bass extension. Now the bass extension on the Yamaha is off. The Dynamic Range is set to standard. One question that I have is in the Subwoofer bass management in the Yamaha there are three settings 1- SW, 2-main, 3-both; right now it is set on both.

When I had it all hooked up the same way except the subwoofer out was going to the RCA inputs on the sub with a g-string subwoofer cable and the cross-over on the sub was set to full range and the knob was turned all the way to i think it is 120hz. The subs volume was on 5 the bass was for the most part pretty dynamic buth there was some noticeable holes I thought. I contributed that to the placement cant do anything about that right now. Going to get a house on the april 11 so I will have a 14 x 21 room just for me woohoo, yeah! But back to what I was talking about does anyone know or understand where I am comming from?

danger boy

nope. don't know what the problem could be in your system. you got the speakers to rock your house.. with the 55i's, CS1000p, FX1000 and the PSW-650.. it should be ratteling windows by now.

Maybe your sub is out of phase or something. but getting a Radio Shack SPL meter is crucial to proper set up of all speakers.

My friend has his Velodyne sub up way to high. after we properely calibrated all speakers in his system.. it brought out the rears and lowered the sub volume quite a bit.. he didn't like the bass though.. but it was calibrated to the proper levels. for me.. bass should compliment the audio...not overpower it so that all you get is thump, thump, thump in everything you listen to.

just my two centavos for what it's worth.

gacole2000

Change your bass management setting to 1-SW, that will send the bass where it needs to be, the sub. I have a similar problem with my Yamaha. I found placement is VERY important. Further, calibration will do wonders also.

Good Luck- Greg