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I have the Harman Kardon AVR525 and am pleased with it (had to exchange the 1st one I got due to some problems). Anyway, I was wondering if inmates can help with the following questions:1.) if I get a decent powered subwoofer and plug it into the HK, will this automatically direct all bass to the subwoofer and not to the Front L&R (where it's going now) thereby allowing the Front L&R to perform better?
2.) if I have a seperate power amp running the center channel (or the Front L&R's) will this "free up" the power that was used for that/those channel(s) to be ditributed to the remaining channels?
All comments welcome.
Uncle Pete
Follow Ups:
(1) The HK will not "automatically" do what you say! You have to enter its setup: "Subwoofer-Yes", "Main speakers-Small". This choice will filter out the bass from the main speakers and direct them to the sub. Since your main speakers, not being required to produce the deep bass now, will have somewhat more power handling capacity. You may have to try the "Main speakers-Large" setting and see which way you like. In this case the main speakers will continue on producing the deep bass along with the sub. It really matters on your main speakers and your room acoustics. There is no one single setup formula.(2) If you do not connect one or more speakers, the burden on the power supply of the receiver will lighten. Less heat will be produced from the receiver. Power to the other speakers may slightly increase under some circumstances. The bad news is that the change will be so little that you probably won't notice any change.
Actually you will notice a big change, as I did, if you add a separate power for the front speakers, the power supply in receivers in not their strong point, so if you remove the load of the front speakers, you will get cleaner sound from the receiver, not to mention the improvement on the front speakers with a proper amplifier, and you can get an used stereo quite cheap...
Antonio Melo Ribeiro
HK AVR525 is rated for:
2*85W/8 Ohm/20-20kHz/%0.07 h.distortion. It's also rated for:
7*70W under same conditions.
With 5 channels less it gives 15W more, hardly audible.
The stuation may change for other receivers though...
Still is more 20%, and you donīt know how those specs are measured...Just borrow a stereo power and try for yourself, then lets us know what you find... ;)
Antonio Melo Ribeiro
> if I get a decent powered subwoofer and plug it into the HK, will
> this automatically direct all bass to the subwoofer and not to the
> Front L&R (where it's going now) thereby allowing the Front L&R to
> perform better?many (perhaps even most) good subs will allow you to dump a signal into the sub which will then filter out the low end and send that off to the main speakers. i just checked the one i am looking into buying, which is the titanic from parts express (ddesigned by vance dickason blah blah blah) and it has that feature.
i've also heard that there are inline filters you can buy which will dump certain freqencies from the mains and allow you to plug in directly. those are another option.
as for whether it will sound better, a lot of people debate this. many choose to run their mains full range with the sub and say they prefer this. others think that dropping the sub frequencies from the mains sounds better... you may want to try both ways before you make a decision.
> if I have a seperate power amp running the center channel (or the
> Front L&R's) will this "free up" the power that was used for
> that/those channel(s) to be ditributed to the remaining channels?probably not... amps have individual power amps per channel and they're not going to get more powerful. there may be some kind of issue with the power supply that will allow it to better distribute the power so that things sound cleaner, but i doubt it will affect volume.
The truth is,
Crossovers at subwoofer frequencies are not practical. They require huge coils and large electrolytic capacitors. Electrolytic capacitors on the path of the speakers, by the way, is degrading.So,
Any subwoofer boasting a hi-pass filtered outlet to the main speakers is highly deceptive. It actually has nothing more than a pair of electrolytic capacitors inside. A capacitor alone produces a first order 6 db/octave filter which is almost useless. And it will degrade the signal quality of the main speakers.Don't buy a subwoofer because it has filtered main speaker outlets.
If the sub you buy has such a feature, don't use it. Leave the crossing-over business to the much more competent active circuits inside the AV receiver.
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