|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
71.187.201.31
In Reply to: RE: Why? posted by BigguyinATL on July 09, 2014 at 11:34:12
Impedance curves can show resonances, both mechanical and electrical. They can also give indications of energy storage( capacitance and inductance). Yes amps can drive those loads but that doesn't mean the amp can compensate for problems in the speaker which is a complex combination of electrical and mechanical loadings that can store energy, can ring, etc. Smooth on axis response says nothing about these factors. And one can argue that while flat response should be a goal, it is not that important a factor in sounding live(with a good recording). Changing your seat at a live concert changes the balance of tones but it still sounds live in both seats.
And flat response tells you nothing about transient response and dynamic response which are critical to simulating a live affect.
Follow Ups:
You are right that a smooth on axis response is not enough - all you have to do put your hands out palms facing the loudspeakers beteen them and you ears to notice it barely makes a difference. A
lso I forgot about the impedance curve showing you mechanical anomalies in the design - and these can certainly effect the timing (phase)of a loudspeaker system. Silly me, I do use the Impedance plot during a 5 Watt Sweep as a QC check for every loudspeaker I make - Just to look for those kinds of structural issues.
Three most important things in Audio reproduction: Keep the noise levels low, the power high and the room diffuse.
Should this test (blocking the path between the speaker and ears) make a difference? It doesn't on mine. It is strange because when I stand behind my speakers they still sound good (not quite as good though). I use ADS L710's..
The classic is the out of the room test. If a speaker sounds 'live' out the door it almost certainly sound 'live' in a good seat in the room.
A good friend(who was a co-designer of among other things the Pipedreams and Scaena speakers) used to decide whether to go into a room at a hi fi show by whether it sounded good outside the room as he walked down the hall way.
If the sound power response of a loudspeaker is somewhat balanced - the sound energy leaving the room will be even also. That's a plus to the out of the room Demo. If the loudspeaker has real bad time response (cabinet resonances etc.) them the in room response will not match the power response and the out of the room can sound decent while the in room sound, sucks. Oh and speaking of sucks, the out of room response has no energy above 5K or so. Hey, but the same is true for a band playing in a room.
Ok and out of the room there is no imaging - mentioned elsewhere.
Three most important things in Audio reproduction: Keep the noise levels low, the power high and the room diffuse.
It is one of my standard ways of aurally evaluating speakers.
I have not once come across a case where speakers sound bad out of the room but great inside.
Just does not happen.
"The classic is the out of the room test. If a speaker sounds 'live' out the door it almost certainly sound 'live' in a good seat in the room."Interesting story, but bullcrap. It's the other way around.
Put a piano or a trombone or a trumpet or a flute or a clarinet in a room.
It'll sound like the real thing both in the room and outside the room. But a speaker can only sound like the instrument outside of the room, assuming the recording wasn't specially produced to mimic a live instrument. The reason is simple: Off-axis and ambient sound. Real instruments don't sound like speakers or recordings.
Try it yourself.
:)
Edits: 07/09/14
Your response is exactly what I mean about being mean...what makes you so sure your ideas are true and better than others? Sorry your speakers don't sound better...
First of all, I'm not a speaker god. I know a little about speakers, but that whole "god" thing I'll leave to people like John Hilliard, Jim Lansing, D.B. Keele, John Meyer, and others.
As I wrote, try it yourself.
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: