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-   -   Question: Should I consider a sub ? (https://www.gearslutz.com/board/studio-building-acoustics/1316516-question-should-i-consider-sub.html)

hato74 27th June 2020 05:58 AM

Question: Should I consider a sub ?
 
1 Attachment(s)
Hello all,
Hope you are doing well!

I monitor the thread https://www.gearslutz.com/board/stud...ncluded-2.html since the beginning and I recently had the opportunity to purchase the excact subwoofer (second hand) which I am using for years now.

My Setup is PMC TB2S+ (powered by Flying Moles) + 2 Acoustic Research Subwoofer + RME Multiface.

If followed the instructions from DanDan and Jens and set the crossover to 150Hz (max. crossover on my subs) ... now my LF is reduced between 30-80Hz after adding the second sub.

I tried several locations for the subs but the LF 30-80Hz did not really improve.
Is this this a kind of cancelation between the subs? Phase is 0 on both subs.

My room is about 35m² with some diy Bass Traps and diy absorbers.

Do you have any ideas or suggestions what I am doing wrong ?

Stay safe! Thanks and regards from Vienna
Thomas

FYI - Recording and mixing is just a hobby for me ;-)

deedeeyeah 27th June 2020 09:41 AM

got dsp to correct/align your rig? if so, how did you position your subs and delay/align them, are you using symmetrical filtwrs, how are results without subs?

hato74 27th June 2020 07:47 PM

Quote:

Originally Posted by deedeeyeah (Post 14824666)
got dsp to correct/align your rig? if so, how did you position your subs and delay/align them, are you using symmetrical filtwrs, how are results without subs?

Thanks, no I don't have dsp at moment, using the built-in crossover from the subs...

edva 27th June 2020 08:19 PM

"Tuning" subs can take a while.
Experimentation is almost always part of the process.
Among the things you might try would be changing the phase settings, moving the subs (perhaps near the full-range monitors), moving all speakers, changing the listening position, etc.
A good software analysis might shed some light on it, but ultimately the issue sounds more like an acoustic one than an equipment anomaly.
That being said, if there were some sort of digital processing latency being introduced somewhere in the chain, it could also account for a "phase shift." Which again would probably correlate to different speaker locations with regard to delay times, and could be solved that way.
Although if you are unable to solve it to your satisfaction by moving things around, DSP could be a method used to improve the situation, especially at the listening position. IMHO. Good luck.

"DSP" can be as simple as EQ or delay. And it doesn't actually have to be "D."

hato74 29th June 2020 07:03 AM

Quote:

Originally Posted by edva (Post 14825480)
"Tuning" subs can take a while.
Experimentation is almost always part of the process.
Among the things you might try would be changing the phase settings, moving the subs (perhaps near the full-range monitors), moving all speakers, changing the listening position, etc.
A good software analysis might shed some light on it, but ultimately the issue sounds more like an acoustic one than an equipment anomaly.
That being said, if there were some sort of digital processing latency being introduced somewhere in the chain, it could also account for a "phase shift." Which again would probably correlate to different speaker locations with regard to delay times, and could be solved that way.
Although if you are unable to solve it to your satisfaction by moving things around, DSP could be a method used to improve the situation, especially at the listening position. IMHO. Good luck.

"DSP" can be as simple as EQ or delay. And it doesn't actually have to be "D."

Thank you, Ed!

hato74 29th June 2020 07:08 AM

1 Attachment(s)
Quote:

Originally Posted by deedeeyeah (Post 14824666)
got dsp to correct/align your rig? if so, how did you position your subs and delay/align them, are you using symmetrical filtwrs, how are results without subs?

Hello, here is the measurment withou the sub(s).
Thanks