Previous Thread
Next Thread
Print Thread
Rate Thread
Page 2 of 3 1 2 3
Re: Power requirements for various channels
cpplain #386103 11/25/12 03:23 AM
Joined: Dec 2003
Posts: 10,420
J
shareholder in the making
Offline
shareholder in the making
J
Joined: Dec 2003
Posts: 10,420
I would suggest you look at one that is capable of that power, regardless of any of your findings, the worst thing you can do for your speaker is under drive it and to achieve reference volumes 100W/ch is at least the minimum I would look at and as others have previously stated, the chances of your system ever requiring all channels driven to the same volume level is extremely rare, if ever, and as you noted you will more than likely see each speaker at some point in a movie could require 100W to achieve refeernce levels, so having an amp that is capable of driving 100W/channle is a very good idea, too much power is a far better thing than too little.

My Denon 3808 is capable of 100W/ch. as shown here


Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70
Re: Power requirements for various channels
JohnK #386106 11/25/12 03:40 AM
Joined: Nov 2012
Posts: 11
C
cpplain Offline OP
frequent flier
OP Offline
frequent flier
C
Joined: Nov 2012
Posts: 11
John, just playing the devils advocate...is it not possible that there could be a movie that would produce a brief peak of 105dB across all channels? In that case: if the receiver was not able to produce enough power and went into clipping, would that damage the speakers?

Re: Power requirements for various channels
cpplain #386108 11/25/12 03:49 AM
Joined: Dec 2003
Posts: 10,420
J
shareholder in the making
Offline
shareholder in the making
J
Joined: Dec 2003
Posts: 10,420
Just a quick question, you do realize how loud 105 db actually is and that most HT system are never played back at those levels. The system is calibrated so that you can achieve reference levels when the volume is set to '0'. I listen at -30 to -10 depending on the film and my room is ~4000cf, vaulted ceiling etc.

And to answer your question to John, IMO, it is always possible, anything is possible, probable is another story and yes clipping is what damages speakers.


Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70
Re: Power requirements for various channels
cpplain #386110 11/25/12 04:22 AM
Joined: May 2002
Posts: 10,644
shareholder in the making
Offline
shareholder in the making
Joined: May 2002
Posts: 10,644
Chris, the devil doesn't have a clue; it's unknown for program material to simultaneously require max power in all channels; and incidentally, clipping isn't necessarily damaging whenever it occurs.

I was looking for a lab test on the 818 to show you, but apparently there isn't one published yet. The closest I found was this test of the 1009, which is a 9-channel unit with essentially the same amplifier as the 818, with the same 135 watt rating.


-----------------------------------

Enjoy the music, not the equipment.


Re: Power requirements for various channels
JohnK #386111 11/25/12 04:36 AM
Joined: Nov 2012
Posts: 11
C
cpplain Offline OP
frequent flier
OP Offline
frequent flier
C
Joined: Nov 2012
Posts: 11
Like you, I wasn't able to find lab tests for the 818. I did see the 1009 test you referenced but wasn't sure how close the 818 would be.

At what point does clipping cause damage? Is it a matter of duration?

Re: Power requirements for various channels
cpplain #386112 11/25/12 04:46 AM
Joined: May 2002
Posts: 10,644
shareholder in the making
Offline
shareholder in the making
Joined: May 2002
Posts: 10,644
Yeah, duration and the sturdiness of the voice coils of the speakers involved.


-----------------------------------

Enjoy the music, not the equipment.


Re: Power requirements for various channels
cpplain #386119 11/25/12 05:24 PM
Joined: Sep 2012
Posts: 292
Likes: 5
T
local
Offline
local
T
Joined: Sep 2012
Posts: 292
Likes: 5
master and commander chapter 4.

Good material to show what quality amplification can do, and if you have "enough." Tests all channels vigoruously, and I can't think of another track off hand that really peaks all channels almost simultaneously. Sure there are many others.

Re: Power requirements for various channels
cpplain #386120 11/25/12 05:40 PM
Joined: Feb 2004
Posts: 1,863
connoisseur
Offline
connoisseur
Joined: Feb 2004
Posts: 1,863
Originally Posted By: cpplain
At what point does clipping cause damage? Is it a matter of duration?


Duration as well as degree both play into a failure caused by operating a speaker in this manner....


I was unwilling to take this risk. Which, is why i bought more power as soon as i noticed my pervious amp being driven into the clipping region.

Re: Power requirements for various channels
JohnK #386744 12/08/12 04:56 PM
Joined: Jan 2012
Posts: 90
old hand
Offline
old hand
Joined: Jan 2012
Posts: 90
Originally Posted By: JohnK
No, Chris; as mentioned before, "all channels driven" isn't a realistic standard outside a test lab in the real world of home listening. When 1 or 2 channels happen to simultaneously hit a 105dB peak(which for most users may never happen, since reference is considered too loud for home use and a 10dB lower setting is common)the other channels aren't at that level.

I know this is an exception, but I have seen it with a friend of mine: he absolutely loves music on "7 channel stereo" (which I don't like personally); he does have the same speaker all around. According to his receiver specs, this means: center channel= a sum of main L+R, and the rest is split equally between all L and R speakers.
So it all comes down to what your intentions are, and you budget.


M80 v3, 2 x Emotiva UPA-1 Monoblocks, XPA-5, UMC-1 PrePro
Pro-Ject RPM Genie, Carver C2 Phono Preamp
Re: Power requirements for various channels
cpplain #386752 12/08/12 08:07 PM
Joined: Dec 2003
Posts: 10,420
J
shareholder in the making
Offline
shareholder in the making
J
Joined: Dec 2003
Posts: 10,420
AHH, but even in stereo the demands on the left and right channels are virtually never the same, so not technically all channels driven, very close but not exactly the same. If it was in 7 channel mono then you have the same demands on all channels driven.


Jason
M80 v2
VP160 v3
QS8 v2
PB13 Ultra
Denon 3808
Samsung 85" Q70
Page 2 of 3 1 2 3

Moderated by  alan, Amie, Andrew, axiomadmin, Brent, Debbie, Ian, Jc 

Link Copied to Clipboard

Need Help Graphic

Forum Statistics
Forums16
Topics24,376
Posts431,999
Members15,416
Most Online2,082
Jan 22nd, 2020
Top Posters
Ken.C 18,044
pmbuko 16,437
SirQuack 13,686
CV 11,805
MarkSJohnson 11,451
Who's Online Now
1 members (Andrew), 75 guests, and 3 robots.
Key: Admin, Global Mod, Mod
Newsletter Signup
Powered by UBB.threads™ PHP Forum Software 7.7.4