Guys, a quick question. How do you gauge the correct Reference Level of an AV system?
AV Receivers/ Speakers/ Subwoofers, Discussion & Opinion
|
|
 Feb 22 2021, 12:17 PM
Return to original view | Post
#1
|
 
Senior Member
1,201 posts Joined: Jan 2003  
|
|
Quote|
|
|
|
|
Feb 22 2021, 01:44 PM
Return to original view | Post
#2
|
|
Senior Member
1,201 posts Joined: Jan 2003
|
that means with SPL meter, we play a pink noise and adjust the volume in order to reach 85db SPL level (without sub) and the volume shown at the AVR would be our Reference Level?
this means regardless of encoding of the movie is louder or softer than others, this is regarded as the volume intended by the director? |
|
|
Feb 22 2021, 02:09 PM
Return to original view | Post
#3
|
|
Senior Member
1,201 posts Joined: Jan 2003
|
i do that with Umik but i find that doing volume matching has very low tolerance to sitting position. the moment i move slightly off from the sweet spot, the effect can really be felt. after trying out a few setting, i prefer to let the Dirac handle SPL matching. i usually watch with my family so i prefer a wider sweet spot.
as for the Reference Level, the reason that i am asking is because a lot of ppl tells me that Reference Level means 0 at the volume control. this is confusing as 83db sensitivity speaker would not give the same SPL as a 96db sensitivity speaker at 0 volume. thats why i would like to know how you guys determine the Reference Level of your system.. This post has been edited by Fusion: Feb 22 2021, 02:10 PM |
|
|
Feb 22 2021, 04:52 PM
Return to original view | Post
#4
|
|
Senior Member
1,201 posts Joined: Jan 2003
|
QUOTE(kevinlim001 @ Feb 22 2021, 02:58 PM) this is confusing as 83db sensitivity speaker would not give the same SPL as a 96db sensitivity speaker at 0 volume the Dirac always use a single speaker as the reference point and the gain +/- will offset each speaker to this reference point. i always thought the reference point speaker would be calibrated to match the AVR volume control after running Dirac but it did not. after changing all the speakers to ATC, the volume is lower even after running Dirac.did you run dirac after you change the speaker? does the measurement / vol correction drop after you change from a 83db speaker to 96 db speaker? the variable that i can think of here is the power.. we need to ensure that the amp/avr is driving at the correct power (watt) for different set of speaker to make it reference at 0 db. Another side not on sensitivity is like the max speed/fuel consumption of the car.. manufacturer tends to have a number that consumer may or may not reach.. for 83db vs 96 db some use pink noise to test some just take a single freq where the speaker perform best for the lab testing.. i just use it for reference but i dont 100% trust on these numbers... the moment i move slightly off from the sweet spot, the effect can really be felt. what kind of effect? i tends to feel the same when i move out of the spot i tends to get more bass or more treble from certain speaker.. when i sit back to MLP.. it all balance out.. its challenging to have multiple MLP.. i will let other shifu to comment on that kind of setup   the variable that i can think of here is the power.. we need to ensure that the amp/avr is driving at the correct power (watt) for different set of speaker to make it reference at 0 db. This is true but if use external power amp, the loudness is determine by the Watt, Input sensitivity and Gain. My Arcam RCA output has very low voltage therefore i need a high gain power amp to achieve the the desired SPL. |
|
|
Feb 23 2021, 10:34 AM
Return to original view | Post
#5
|
|
Senior Member
1,201 posts Joined: Jan 2003
|
i understand your theory but if you do channel level matching by moving the speaker around, you will create another set of problem which would offset the time alignment, phase corretion and you would need to compensate for all the deco in the room as well. why dont you do a complete Audyssey and manually correct the value to suit your need?
i think its possible if you have a symmetrical room with 5 speaker but it will be extremely difficult for non symmetrical room especially with Atmos setup. This post has been edited by Fusion: Feb 23 2021, 10:38 AM |
| Change to: |  0.0797sec
 0.72
 7 queries
 GZIP Disabled
Time is now: 4th December 2025 - 06:35 AM |
All Rights Reserved © 2002- 2025 Vijandren Ramadass (~unite against racism~)
Powered by Invision Power Board © 2025 IPS, Inc.