amplififer

[superick]

hello first time on here my problem;i have a denon 7.1 amp 90w per channel. i bi amped the front speakers so i turned it into a 5.1 but i bought some klipsh front speakers that need more power then my denon can produce.i got agood deal on them.i hear you can increase the amps wattage by putting in a bigger capaciter.am i wrong.any help you can provide would be appreciated.

[Mr Peabody]

What Klipsch model? Power is not your problem. Klipsch is one of the most efficient home speakers on the market, 90 watts should make your ears bleed. What is happening to make you think you need more power? Certain Klipsch models don't go very low even though they have big woofers so if that's the problem power wont' help, engage sub.

[eisforelectronic]

If my Denon is driving my Tempo's, I doubt your Denon is having trouble with your Klipsch. However if it's more power you want, I would look for a more powerful amplifier to hook up to your pre-outs. That's my plan for now anyway. If your Denon doesn't have pre-outs, then I would look for a better receiver or separates before I started redesigning my current receiver.

[bfalls]

Additional capacitors in the power supply can provide additional power, but this is intended as reserve power for instantaneous peaks such as explosions and not intended for long-term output. Also, the capacitors by design, won't discharge their voltage unless the power supply starts to fall below it's intended operating point. If the power supply can't handle the load, the capacitors supplement it until their charge is dissipated. Once the capacitors are drained (during high continuous output), the power supply can't recharge them because it's still under load, or can't charge fully. It's at this point distortion starts to rear it's ugly head which can cause damage to either the speakers, the amp/receiver, or both.

As stated before, Klipsch' are some of the most efficient speakers on the market and Denon receivers are pretty robust. What makes you feel the Denon can't drive the Klipsch'?

[superick]

sorry it took so long to reply work has been crazy.okay ill tell you my set up
dennon avr 790
kplisch rf 83
jbl center
jbl sourrond
mission 8in sub powered 2 of them
room size 30 ft by 35 ft
now i wanted to replicate the movie theater it does this and much better
but when i put on cds i want to replicate a rock concert my amp shuts down because it cant power the kplisch speakers .i turn off all speakers except the klipch and the subs
and its obvious it wants more but my amp cant supply it.i want my movies and music all in one system but i think ill have to get a seperate amp with more wattage just for the towers maybe a 2 channel amp. thanks again for your help.

[Mr Peabody]

I'd really hate to see you spend the money for a new receiver just to have the same problem. If the receiver is shutting down there must be something connected wrong. My brother has a entry level Denon and drives Infinity Kappa 7's with it. They are 12" 3-way speakers in a sealed box only about 88dB or so sensitivity. Your Klipsch would play about 3 or 4 times as loud with the same power. Are the metal strips in place that go between the binding posts? You said you have two subs, how are they hooked up? Of course, you do have a large room but that would be more of the sub's problem than the Klipsch. Try setting the mains to "small" if not already and see if that helps the receiver.

[superick]

yes i did all that mister peabody.subs are hooked up by the sub out on the amp.the binding posts are removed so it can be byamped hence no more 7.1

[superick]

the sensetivity on the klipch are 97.5

[superick]

sorry 100db

[blackraven]

With a sensitivity of 100, a 10wpc amp would make your ears bleed and get the neighbors calling the police. Something is wrong or you are turning the sound as loud as it can go and overheating the amp and shutting it down. Are you biamping with one amp, using the rear channels for biamping? If so, don't biamp and see what happens.

[superick]

yes thats whats happening my amp is shutting down overheating i have tried not biamping
the same thing happens.it could the mucic i listen too.hard rock heavy metal.

[superick]

i have not tried any other music

[Ajani]

Strange that you should be having this problem with such highly sensitive speakers, but I suppose you really could be cranking to ear bleeding levels from right across that large room, in which case you may want to look for a more powerful amp...

Do you have a budget in mind?

[superick]

im cunfused bi amping would make my amp not work so hard

[superick]

no no budget just brand harmon or denon

[Ajani]

no no budget just brand harmon or denon

Why limit yourself to just Harman or Denon for a seperate 2 ch amp? You could get much more power buying a new Emotiva XPA-2 (300 watts) or a used/old stock Rotel RB-1080 (200 watts)....

[Mr Peabody]

If your Denon has preamp outs why not run the mid/high off the receiver and come out of the pre outs to a power amp to drive the bass. Look for something like an Adcom 555 or 5500, that would light them up for cheap. Or, you could join several on here and get an Emotiva XPA2.

[Mr Peabody]

I'm wondering what impedance the Denon sees when biamping the Klipsch. If 4 ohms or less it could be what the problem is..... except you did say the Denon shuts down when not biamping.

[superick]

im thinking its the highs and mids that causes the amp to shut down since all the low are going through the subs that the way i set it up through the denon

[superick]

im going to try setting more bass through the klipsch and see how it sounds

[blackraven]

What model Denon and Klipsch speakers do you have? It could be as mentioned before that the speakers are rated at 4ohm and the receiver is rated at 8 ohms only. If your turning the volume way loud then this can cause the amp to over heat and shut down. The 3000 and 4000 series Denon amps should not have that problem. The 2000 series certainly could.

[Mr Peabody]

You are using the bottom of the Klipsch, aren't you?

[frenchmon]

How are you bi amping ?

I've got a 7.1 Marantz receiver that I have bi-wired . I've got the front pre-outs on the receiver going into a two channel Adcom amp 5400 and then my front speakers connected to it bi-wired.

Heres bi amping.

http://img691.imageshack.us/img691/5548/brassandgraniteaudiobia.jpg (http://img691.imageshack.us/i/brassandgraniteaudiobia.jpg/)

Heres bi wiring.

http://img707.imageshack.us/img707/8010/brassandgraniteaudiobiw.jpg (http://img707.imageshack.us/i/brassandgraniteaudiobiw.jpg/)

Now which one are you doing?


frenchmon

[frenchmon]

You are using the bottom of the Klipsch, aren't you?

No...I think he has all the lows going to the sub.

[frenchmon]

yes thats whats happening my amp is shutting down overheating i have tried not biamping
the same thing happens.it could the mucic i listen too.hard rock heavy metal.

If this is the case...you either have something configured wrong, or your Denon is faulty...you should have it checked out.

frenchmon

[superick]

im bi amping.everything was installed by audio/visual company that installs in new const homes .as for 8 oms and 4oms that is not it .maybe im asking too much from my denon.but thanks maybe i will get it checked out.i know how to hook it up and every thing checks out even the wire is 14 gauge surrond 12gauge front bi amped

[superick]

denon excepts both the speakers are 8oms

[Mr Peabody]

If you are not using the bottom end of the Klipsch I'd suggest hooking them up. The mid/high horn arrangement is not made to play low enough and the sub is not made to play mids and high enough to be cohesive. Plus the bottom end of the Klipsch would help fill the room with sound as well as frequencies you are missing.

If your professional installers knew so much you wouldn't be having trouble now, would you?

[superick]

my first front were polk tsi 400 but i got these new kplisch and thats when the problem started.i might add i would crank the polks because i was afraid they would blow but these kplisch could handle all kinds of power

[superick]

thanks for the help

[frenchmon]

thanks for the help

IF the install company hooked everything up, you might want to get them back over to take a look at his work...


frenchmon