I would be very interested in the proccesing side. Apart from HP and LP filters are there any home gamer signal conditioning / EQ circuits that can cope with such a narrow bandwidth of say 20-200hz?
I have a pair of old LEM 18" (horn design) subs. The actual sub driver is situated in the bottom of the subs facing upwards. I feed them signal below 100hz through a stereo behringer Graphic eq that has a dedicated mono subwoofer (low pass) output. The subs are paired with two 15" full range EV speakers on the top fed with full range signal, obviously not an ideal scenario due to conflicting low frequencies... Since the subs are not of generic direct front facing driver design. Is there excess phase cancelation between subs and tops? Its really confusing :P thanks
being that close you wont be able to analyze a whole cycle of a low frequency as they measure meters in length. thus you will get phase issues and a bad coherence response.
@@octaudio Simply not true, that is a myth. It's exactly how many mic'ing measurements are performed. One method I utilize for monitoring is via Westone In-Ear monitors. They fully resolve down to 16hz or so before roll-off. Close mic'd measurement are fine... they minimize the room's influence and corruption of the freq response... ie., more direct signal, less indirect room. How'd a close mic'd singer sound if a close mic'd approach "wouldn't be able to analyze the whole cycle"... blah blah blah... Although many feel the same, that's just not the physics involved.
2:28 How is good sounding subwoofer cut the frequency below 30 Hz with -15dB at 25 Hz and -27 dB at 20 Hz? This is terrible subwoofer, not capable of doing what is supposed to do - producing LF. A good Subwoofer will go down to sub 20 Hz, even 10 Hz. This is NOT applicable to a home system at all.
perfect weather conditions hahaa
Thanks for the video! Looking forward to the next part about processing.
This is a very good video. This channel needs more attention!
these are advanced audio concepts, i barely understand, subbed
nothing really advanced here. Just phase-correct summation of 2 signals (complex addition).
@@thomaslechner1622 i dont understood everything he mentioned,
but i still dont know exactly what "phase" n audio exactly means
@@davpro1792 Please read Chapter 2 "Summation" of Bob Mc Carthy - Sound Systems, design and optimization!
Incredible video!
fantastic analysis! regards!
It was snowing on this day four years ago thankyou for the video SUBS in the snow ;0
I would be very interested in the proccesing side. Apart from HP and LP filters are there any home gamer signal conditioning / EQ circuits that can cope with such a narrow bandwidth of say 20-200hz?
so cool!
I have a pair of old LEM 18" (horn design) subs. The actual sub driver is situated in the bottom of the subs facing upwards. I feed them signal below 100hz through a stereo behringer Graphic eq that has a dedicated mono subwoofer (low pass) output. The subs are paired with two 15" full range EV speakers on the top fed with full range signal, obviously not an ideal scenario due to conflicting low frequencies... Since the subs are not of generic direct front facing driver design. Is there excess phase cancelation between subs and tops? Its really confusing :P thanks
Part 2?
Nice
they work like "boom boom boom"
LS 18 is a inverted parallel 6th order band pass
And now I know,, thanks
information overload!! must . . . come back . . . later!!
(great video tho!!)
Very educational
Okay, but how do I get those Subwoofer Friends..?
Share, and the friends will come.
LOL!! we have friends with some interest in audio systems but none interested in knowing what is inside it
Do you take classes to teach audio design and setup?
Why does the industry use this LS18 kind of design?
What is it's purpose? cons/pros?
6th order boxes tend to have wider bandwidth but they're harder to design than a simple ported box
isn't the cone affected by the water?
only if the cone is made of paper
I think most pro audio drivers even from paper are coated with something protecting them from water@@yo999da
Is that a b&c 18sw115 loaded in the rs18?
Is a near field measurement and is correct for measuring the frequency response of a loudspeaker
are you sure you can get precise low's data if positioning the mic that close ?
As long as the mic isn't experiencing overload, it's fine.
being that close you wont be able to analyze a whole cycle of a low frequency as they measure meters in length. thus you will get phase issues and a bad coherence response.
@@octaudio
Simply not true, that is a myth.
It's exactly how many mic'ing measurements are performed.
One method I utilize for monitoring is via Westone In-Ear monitors.
They fully resolve down to 16hz or so before roll-off.
Close mic'd measurement are fine... they minimize the room's influence and corruption of the freq response... ie., more direct signal, less indirect room.
How'd a close mic'd singer sound if a close mic'd approach "wouldn't be able to analyze the whole cycle"... blah blah blah...
Although many feel the same, that's just not the physics involved.
👏👏👏👏👏
In the snow? REALLY.
耳鳴りのが大きい奴の対処法は
I don't need to know how they work. I don't need to read Facebook for opinions.
2:28 How is good sounding subwoofer cut the frequency below 30 Hz with -15dB at 25 Hz and -27 dB at 20 Hz? This is terrible subwoofer, not capable of doing what is supposed to do - producing LF. A good Subwoofer will go down to sub 20 Hz, even 10 Hz. This is NOT applicable to a home system at all.
Nice