Subwoofer test 10hz

[EmpireLS56KW]

Now play a film like Master and Commander at the same level (the same level and watch the subs and amp destroy themselves in)! Lows down at 10Hz can not be heard only felt and you’re playing it way, way, way too high!

If you want to record you have to use the SPL db as mic and play the level many db lower in level! The SPL db set it 90dbc or use the setting of 100dbc and record it from 1metre back and see if that helps.

[Tricyklist]

@EmpireLS56KW Hi, my video was just a bit of fun to share the VLF capability of my big IB sub. Most home subwoofers can't reach 10Hz. Let alone play 10Hz well above 100dB(C). On action films my recent average is up around 113-115dB(C) on LFE peaks measured directly with a Galaxy 140 SPL meter at 3 metres (Max hold C-weighting) Anything louder is pointless as the whole film becomes too loud to enjoy comfortably. The infrasonic effects also become far too intimidating. :-)

[EmpireLS56KW]

@Tricyklist LOL and most can’t even hear 10Hz under normal conditions! 20Hz to 120Hz is good enough! if it works well in THX cinemas even thou its EQ 30Hz to 120Hz that’s still plenty loud enough if it can produce even uniformed frequency response over seating at home without demanding too much amp power were some of the lows due to shallow sloping dips can force us to turn it up or LCRS is improbably balanced forcing us yet again to turn the sub up way past the standards.

[Tricyklist]

@EmpireLS56KW Hi, I am afraid you are missing the point completely. The 10hz to 20Hz band is all about physical sensation. Film LFE and classical organ music have lots of 10-20Hz content. It isn't put there just to amuse the director. My big subwoofer is all about reproducing this frequency band with low distortion and great realism. :-)

[EmpireLS56KW]

@Tricyklist Have you used Spectrum Lab with a good microphone to capture the In-Room Frequency Response?

First take a short recoding from the source directly attached to the AVR sub/LFE.1 output so you know what it looks like. Use the pc record input. Don’t take a recoding directly from the DVD/bluray player Lt-Rt outputs use the LFE.1 as that is where such and such low is. I’m not missing the point. I’ve had my share of infrasonic sub bass with EARTHQUAKE in 1975.

[EmpireLS56KW]

I just want to get in the loft and build an IBS I can’t build it on the ground level and then stuff it though the hatch, chances are it won’t fit LOL! So the parts have to be cut to size and assembled in the loft.

Also does your amp have barograph LED display to show just how much power you’re throwing away or how close to clip it is?

[Tricyklist]

@EmpireLS56KW Have you heard of the Cult of the Infinitely Baffled forum? Don't build anything until you've had a good look at the forum threads, encyclopaedic FAQs and multiple galleries. My amp is a Behringer EP2500. A popular and affordable choice for IBs. It has two LEDs to indicate output and clipping. I have never seen clipping on my amp.

[EmpireLS56KW]

@Tricyklist As a matter of fact I joined the site last week and read though the FAQ and was amused by (the chimney part). I have good opportunity in the loft but I need size up the project as I guess each one is different. I saw the gallery pictures some good designs thou I don’t like the idea of having two holes in the floor. What if you feel down the hole LOL WHAM BANG CRASH! LOL

You' re fortunate not to clip the amp!

[EmpireLS56KW]

Most dynamics on even for bluray doesn’t go anywhere near to produce 140db and that level will sooner or later damage your hearing! Tinnitus is no fun at beach believe me. Earthquake in sensurround early 1975 was 120db! If I knew that I would taken some earplugs! I've suffered on and off since I noticed it in 1978 when it runs for days on end it can drive a person stir crazy.

I watched Unstoppable today and the most SPL db I would allow that film to play at is 100dbc peak the rest of it...

[EmpireLS56KW]

....might be playing in the 85dbc range I looked at chapter 13, the derailing and it was damn loud! The real thing would be even more greater! I was a little disappointed with some of the interior shots of the train as their should have be a lot of rumbling vibration motion as you get with the real thing! Mixers sometimes really do get on my tits!

[Izurak]

heard this Hz from my Siberia v2, this is insanely loud.

[Tricyklist]

Hi. It might just be possible to sense a 10Hz sinewave from a good pair of closed headphones at high SPLs. A 10Hz sinewave is usually completely silent to the human ear. It is felt rather than heard. If you hear anything (at all) you are probably listening to harmonics rather than the pure 10Hz fundamental. Even at 22Hz I sense only an extremely soft flutter in the air on sinewaves. There is no sense of musical tone at all. I can easily hear the rattles it causes though. ;-)

[Tricyklist]

Hi and Thanks. IB subs do sound very deep and incredibly realistic compared with most other subs. They make other subs sound muffled, muddy and compressed. So IB subs are great for Home Theatre as well as all kinds of music. They will go very loud but aren't meant for indoor drag racing. You'll get 130dB+ at frequencies above 30hz on only 1000 Watts if you have enough 15"s or 18"s. Check out all the "USUL" videos by another IB sub builder.

[iownbitcheshoe]

Thats gotta sound awesome man love it!

[Tricyklist]

Thanks. I have now corrected the imbalance in reaction forces due to dissimilar drivers being placed in mechanical opposition to each other. Now it rocks instead of shacking and rattling. ;-)

[chevyman217]

Very nice!

5*****