Need More power...My Receiver Sucks!

LuSh

50amps of current driven into an 8ohm speaker load is 20,000 watts. I find this hard to fathom.

lakesailor

LuSh wrote: »

50amps of current driven into an 8ohm speaker load is 20,000 watts. I find this hard to fathom.

It might be an idea to email H/K and bring your concerns to their attention with respect to how they report product specifications and their HICC ratings. From my own perspective I have had first hand enjoyment of the H/K AVR’s and believe that they produce a very nice sounding unit in this segment. That said; I have yet to match up an H/K with some Polk’s…I will have to add that to my “to-do” list

John K.

Sailor, the key word in that spec is "instantaneous", which sounds good but is essentially meaningless. What it indicates is that the quoted amperage would be available for only a brief instant, probably a few millionths of a second. As Lush correctly pointed out, 50 amperes into an 8ohm load is equivalent to 20,000 watts; this results from the form of Ohm's Law which states that power is equal to current squared times impedance(P=I[squared]R). The quoted spec might have been achieved by using a load impedance of a tenth of an ohm or less(e.g. 50[squared]x .1=250 watts)for a few millionths of a second, and is meaningless in real world operation.

The amount of current needed in a given situation is determined by Dr. Ohm, not by manufacturer hype about "high current". Less than 1 ampere is needed for an average comfortably loud listening level, and even for brief peaks which might take as much as 100 watts, only about 4 amperes are required, as the formula indicates.

tonyb

The man just wants a recommendation without having to break it down into
sub-atomic particles.

lakesailor

John K. wrote: »

Sailor, the key word in that spec is "instantaneous", which sounds good but is essentially meaningless. What it indicates is that the quoted amperage would be available for only a brief instant, probably a few millionths of a second. As Lush correctly pointed out, 50 amperes into an 8ohm load is equivalent to 20,000 watts; this results from the form of Ohm's Law which states that power is equal to current squared times impedance(P=I[squared]R). The quoted spec might have been achieved by using a load impedance of a tenth of an ohm or less(e.g. 50[squared]x .1=250 watts)for a few millionths of a second, and is meaningless in real world operation.

The amount of current needed in a given situation is determined by Dr. Ohm, not by manufacturer hype about "high current". Less than 1 ampere is needed for an average comfortably loud listening level, and even for brief peaks which might take as much as 100 watts, only about 4 amperes are required, as the formula indicates.

Obviously spec’s are all relative; however comparative output between different manufacturer’s products is a valid and legitimate cause. High current amplification is a concept endorsed by virtually all companies recognized as being leaders in this field.

My only point is to recognize that H/K believes in this as well and it’s AVR receivers are designed accordingly. I can guarantee you that my Pioneer Elite does not have neat the amp. output capability of the H/K’s; that does not mean it does not sound good; it does. I simply believe that the H/K AVR’s sound superior. Ultimately you cannot judge sound quality based on what Dr. Ohm says.

cfrizz

ROTFLMAO!!!!:D Good one Tony.:D

tonyb wrote: »

The man just wants a recommendation without having to break it down into
sub-atomic particles.

andrew_mac

Who is Dr. Ohm? wtf? Raise your hand if you like HK....thats all I really was goin for here. But on a more serious note.. thanks for all your replies folks. I'm still in the market for a good cheap avr for my set up.

aaharvel

On the AVR-635....... 75 watts and >50amps of current into an 8ohm load = 20,000 watts? Cool. So by that reckoning my H/K Signature at 150watts and 100>amps of current bi-amped to my Revels = 80,000 watts of instantaneous power? Sweet.....

MacLeod

I would assume that 50 amps is current DRAW and not output. My Crossfire car audio amp draws a max of 40 amps for 50x4. So that would be a max draw of 6000 amps or roughly 3 of my wifes hairdryers. Sounds about right for a 75x7 amp and as we all know, HK's are usually underrated so you can figure that thing is probably more like 85+x7. Again, this being a max draw, its very VERY unlikely youll ever get anywhere near that.

And for whoever asked about used 2 channels for $200, there is this Onkyo 2 channel new on Crutchfield, 100x2 for $300 shipped.

http://www.crutchfield.com/App/Product/Item/Main.aspx?g=10450&i=580M282&tp=180

Sami

Mauskar wrote: »

A $200 used 2 channel amp? Where is this?!

Here you go...

http://www.polkaudio.com/forums/showthread.php?t=56936

wallstreet

Live with what you got. Save your money and don't piss it away on some stop gap measure that'll have a very limited shelf life, IMHO.

Mauskar

lakesailor wrote: »

It might be an idea to email H/K and bring your concerns to their attention with respect to how they report product specifications and their HICC ratings. From my own perspective I have had first hand enjoyment of the H/K AVR’s and believe that they produce a very nice sounding unit in this segment. That said; I have yet to match up an H/K with some Polk’s…I will have to add that to my “to-do” list

I can say that my H/K sounds worlds better in terms of "loudness" and crisp sound on my polk Rti10's. I'm comparing them to an Onkyo 705 that I recently auditioned. Once i tried the H/K i didnt need to look any further