Previous Thread
Next Thread
Print Thread
Rate Thread
Page 2 of 13 1 2 3 4 12 13
Re: Amplifiers
#94511 05/17/05 02:50 AM
Joined: Jul 2004
Posts: 4,444
Likes: 16
M
connoisseur
Offline
connoisseur
M
Joined: Jul 2004
Posts: 4,444
Likes: 16
I'm a believer that higher current makes a difference in SQ, not necessarily just 'loudness'. I think you'll find that most folks who run high current amps will agree. I wouldn't get all hung up on the loudness debate.

I'm pretty new to all this, so I may be full of it.

Re: Amplifiers
#94512 05/17/05 03:22 AM
Joined: Dec 2003
Posts: 1,424
connoisseur
Offline
connoisseur
Joined: Dec 2003
Posts: 1,424
In reply to:

I'm a believer that higher current makes a difference in SQ




You are not alone. I have been on the amps versus watts bandwagon for years............and have taken many lumps for it but I still believe it.

Re: Amplifiers
#94513 05/17/05 03:24 AM
Joined: Apr 2005
Posts: 1,155
connoisseur
Offline
connoisseur
Joined: Apr 2005
Posts: 1,155
Bren: what is there about clipping that will damage a speaker? There is all sorts of music with all sorts of wild power/ frequency swings.

Just curious.

The Rat.


The Rat. M80s, VP-150, QS8s, SVS PC 20-39+, OPPO, Onkyo 703s, Harmony 880 Sony 60" SXRD HDTV
Re: Amplifiers
#94514 05/17/05 03:34 AM
Joined: Apr 2005
Posts: 2,339
B
connoisseur
OP Offline
connoisseur
B
Joined: Apr 2005
Posts: 2,339
There are many of you amp people out there.

Since higher amps like your 1080 (200) don't produce that much more loudness (again Alan's Newsletter articles), I guess I won't know the difference until I try it.

Maybe an Outlaw in my future. That 30 day trial may be the only way to tell.

Re: Amplifiers
#94515 05/17/05 03:37 AM
Joined: Dec 2003
Posts: 1,424
connoisseur
Offline
connoisseur
Joined: Dec 2003
Posts: 1,424
In reply to:

what is there about clipping that will damage a speaker?




http://www.rane.com/note128.html

Re: Amplifiers
#94516 05/17/05 03:41 AM
Joined: Aug 2004
Posts: 6,379
Likes: 7
axiomite
Offline
axiomite
Joined: Aug 2004
Posts: 6,379
Likes: 7
Interesting link... well worth reading.

Do we agree with it ?


M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8
Re: Amplifiers
#94517 05/17/05 04:40 AM
Joined: Apr 2005
Posts: 552
aficionado
Offline
aficionado
Joined: Apr 2005
Posts: 552
Let me ask a question like this: would my m60s (rated at 250 watts) peform better with a 200 wpc or 130 wpc? I am not talking about deafening listening levels, just normal.

Also, do you guys think it is necessary to calibrate a 2 channel system with a SPL meter?


Axiom M60s, QS4s, VP100 Onkyo TX-SR804 Oppo 970HD Rotel RB-1080/RCD-1072 REL Q150E sub, PS 3
Re: Amplifiers
#94518 05/17/05 05:07 AM
Joined: Dec 2003
Posts: 1,424
connoisseur
Offline
connoisseur
Joined: Dec 2003
Posts: 1,424
In reply to:

Let me ask a question like this: would my m60s (rated at 250 watts) peform better with a 200 wpc or 130 wpc? I am not talking about deafening listening levels, just normal.




Nope. Be almost the same.

In reply to:

Also, do you guys think it is necessary to calibrate a 2 channel system with a SPL meter?




If you had a sub yes, 2 front speakers and nothing else, nope.



Re: Amplifiers
#94519 05/17/05 05:09 AM
Joined: Dec 2003
Posts: 1,424
connoisseur
Offline
connoisseur
Joined: Dec 2003
Posts: 1,424
In reply to:

Do we agree with it ?




There are some very well respected Engineers referred to in that article. I'm not qualified to agree or disagree with it as I wouldn't have a clue where to start.


Re: Amplifiers
#94520 05/17/05 05:25 AM
Joined: Dec 2003
Posts: 3,602
B
connoisseur
Offline
connoisseur
B
Joined: Dec 2003
Posts: 3,602
In reply to:

Bren: what is there about clipping that will damage a speaker? There is all sorts of music with all sorts of wild power/ frequency swings.


The easy answer - when a signal is clipped, it's turned into somewhat of a square wave, which increases all the harmonics in the form of distortion (on a S/S amp - it's odd order distortion and sounds like crap... on a tube amp - it's even order distortion and sounds musical, this distortion is what gives the "tube sound") want to see what clipping looks like on an oscilloscope? Get a piece of letter sized paper, I'll wait.

Got it? Good... now draw a camel's humps - say ten of them... a wavy line about 2" high total, half the humps below an imaginary centre line, half above...
---/\/\/\/\/\--- like that only rounded - there's a sine wave - I drew a triangle wave in ASCII there and if it looked like ---|\|\|\|\--- that would be a sawtooth waveform... anyone that played with early digital synths should recognize those. But I digress. Now draw the same thing, only 12" high (but you're not allowed to go off the page - flatten out the peaks. It's starting to look like a square wave (or pulse wave) now.

But why does a pulse/square wave destroy speakers? Honestly, I'm not sure if anyone knows. Yes, there is a lot more "oomph" to them because of all the harmonics... but as the harmonic intervals get further away from the fundamental (original) wave, they get less powerful very quickly.

In short - I personally can't tell you why it happens, just that it does. Alan? Your opinion?

As for music with "swings" in frequency and amplitude - that's really not what we're talking about here. Well, unless you set the volume for the diminished level and the elevated levels push the amp into a clipping state.

Bren R.

Page 2 of 13 1 2 3 4 12 13

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 (), 145 guests, and 4 robots.
Key: Admin, Global Mod, Mod
Newsletter Signup
Powered by UBB.threads™ PHP Forum Software 7.7.4