Previous Thread
Next Thread
Print Thread
Rate Thread
Page 4 of 9 1 2 3 4 5 6 7 8 9
Re: How much power do I need - m60 measurements
#132793 03/22/06 07:14 PM
Joined: Feb 2006
Posts: 120
Gena Offline OP
veteran
OP Offline
veteran
Joined: Feb 2006
Posts: 120
_________________________

I don't recall seeing a mention, about THD specs in the thread
____________________________

I don't have any instruments handy to measure the THD. However, Onkyo specs are 0.08%, power rated. I think that since I'm way under the power limit that number should be correct.

Re: How much power do I need - m60 measurements
#132794 03/22/06 07:39 PM
Joined: Jun 2005
Posts: 1,189
connoisseur
Offline
connoisseur
Joined: Jun 2005
Posts: 1,189
Terrific experiment Gena! I have the same kind of curiousity about this as you do, but never did anything about it. Now I don't have too I thank you for your efforts.


-Dave

M80s VP150 QS8s EP500s
ravenmanor.com/cinema/
Re: How much power do I need - m60 measurements
#132795 03/22/06 10:02 PM
Joined: May 2004
Posts: 1,201
connoisseur
Offline
connoisseur
Joined: May 2004
Posts: 1,201
In reply to:

My other hobby is photography. You’d be surprised how many people buy ten’s of thousand dollars worth of equipment and then spend all their time taking pictures of brick walls, comparing the sharpness of this to that, resolution of this to that… No money left over to make good prints or travel to photographic locations.




So...which lens is sharper? Leica or Zeiss? I used to read those photo forums quite religiously. I know exactly what you're talking about. Made me chuckle a bit.


*Michael*
AV123 Refugee - X-LS Encore, X-Voce, X-Omnis, Elt-Dpa's
Denon AVR-591
Magnavox NB500MGX BDP

Re: How much power do I need - m60 measurements
#132796 03/22/06 10:04 PM
Joined: Mar 2004
Posts: 27
S
hobbyist
Offline
hobbyist
S
Joined: Mar 2004
Posts: 27
Gena,

Thanks for this post, I was wondering how a separate multi-channel amp would affect my sound as I hear some strain in some loud(not wake the dead ear splitting) vocals. But I am way to stupid and lazy to do measurements.

With 1kHz tone

“Vrms (V) -- Power (W) --Sound Level (dB)
6.0 //4.5 //85 Really loud “

With 5.1 music
“At the receiver volume of -10dB the sound level was 85dB – this was the maximum I can listen to for some extended time. The average voltage on the speaker was about 2V – this is 0.5W of rms power and the peaks were up but never higher than 10V – this is 12W of power.”

These power measurements are 1 channel then 1 of the 5 channels for music ? Amazing how much power the powered subwoofer saves the channel amps.

JohnK,

That article is fantastic, makes a good case for BLIND testing.


Looks like an amplifier does not have much effect on signal quality and buys only undistorted volume, which is what I need if I want to crank it up. I would not go further than something like the 200 Watt Outlaw. My receiver(Yamaha RX-V2400) spec., is 120 Watt rms per channel. Even if that’s shared between the front 3, the Outlaw buys me 200 W rms vs. 40 W rms only half again as loud ? Am I looking at this correctly ?


Re: How much power do I need - m60 measurements
#132797 03/22/06 10:31 PM
Joined: Apr 2005
Posts: 2,339
B
connoisseur
Offline
connoisseur
B
Joined: Apr 2005
Posts: 2,339
I agree with the numbers as presented but do find my sentiments follow this line of thought.

As I have said before, "It all may be between my ears".

Bug

Re: How much power do I need - m60 measurements
#132798 03/22/06 10:39 PM
Joined: Dec 2005
Posts: 3,301
connoisseur
Offline
connoisseur
Joined: Dec 2005
Posts: 3,301
Another good article, I think more than a few of us have the same thing between our ears


A computer once beat me at chess, but it was no match for me at kick boxing.
Re: How much power do I need - m60 measurements
#132799 03/22/06 10:42 PM
Joined: Feb 2006
Posts: 120
Gena Offline OP
veteran
OP Offline
veteran
Joined: Feb 2006
Posts: 120
These power measurements are 1 channel then 1 of the 5 channels for music ? Amazing how much power the powered subwoofer saves the channel amps

_______________________________

Right. These measurements are for one channel with all the rest 5.1 (or 7.1) ON including the sub. So they all kick in. The mains are relieved from the bass duties and the 500W of EP500 are doing all the hard work.

Re: How much power do I need - m60 measurements
#132800 03/22/06 10:44 PM
Joined: Feb 2006
Posts: 120
Gena Offline OP
veteran
OP Offline
veteran
Joined: Feb 2006
Posts: 120
So...which lens is sharper? Leica or Zeiss?
________

Oh, don't get me started . Besides, I'm content with Canon 20D and my 135L. The lens is a marvel

Re: How much power do I need - m60 measurements
#132801 03/22/06 11:03 PM
Joined: Jul 2004
Posts: 4,444
Likes: 16
M
connoisseur
Offline
connoisseur
M
Joined: Jul 2004
Posts: 4,444
Likes: 16
A WATT is a mathematical sum of voltage and current. (One watt equals the production or use of one joule of energy per second)

What is missing with the synopsis that “a power amp” only requires X Watt’s to effectively drive a set of speakers, does not take into consideration that while ONE WATT may be ample to drive a set at some deafening SPL, that ONE WATT may require 60 amperes of current. 120 VAC @ 60 amperes is roughly 7200 Watts.

This is where low end (low current capable) amplifiers can not supply the required current (amperes) to drive those speakers. IE: highly efficient 4 ohm speakers such as the M80.

For example, I have a POS AVR that I picked up at Costco a few years back for a HTIB system that was “rated” at 120 watts per channel. As an experiment, I hookep up my M80’s to it, and it would immediately go into overload protection and shut down when I would try to power it up. I then hooked up a set of M3’s to it and it would power up, but would shut down at half volume.

I’m far from being anywhere close to an EE and would be interested in your thoughts in regards to this (Gena / John).


Re: How much power do I need - m60 measurements
#132802 03/22/06 11:15 PM
Joined: Jul 2004
Posts: 828
aficionado
Offline
aficionado
Joined: Jul 2004
Posts: 828
Interesting stuff. I just want to know where can i get a 5 watt HT receiver with all the options i want.


------------------------------------------------
Leave the gun, Take the canolis.
Page 4 of 9 1 2 3 4 5 6 7 8 9

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

Link Copied to Clipboard

Need Help Graphic

Forum Statistics
Forums16
Topics24,940
Posts442,457
Members15,616
Most Online2,082
Jan 22nd, 2020
Top Posters
Ken.C 18,044
pmbuko 16,441
SirQuack 13,840
CV 12,077
MarkSJohnson 11,458
Who's Online Now
0 members (), 386 guests, and 4 robots.
Key: Admin, Global Mod, Mod
Newsletter Signup
Powered by UBB.threads™ PHP Forum Software 7.7.4