36" THT Low Profile, Warning lots of coffin pictures

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Bill Fitzmaurice
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Re: 36" THT Low Profile, Warning lots of coffin pictures

#31 Post by Bill Fitzmaurice »

Smooth at 1/6 octave, that's as good a resolution as you can hear. The notch at 80Hz is probably sourced by the reflected wave off the wall behind the listening position, but it's narrow enough that you may not be able to hear it.

El dillo
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Re: 36" THT Low Profile, Warning lots of coffin pictures

#32 Post by El dillo »

My experience so far...

It sounds great :D , a whole new dimension.... So much power and dynamic.
Control and detail, my old subs sounds weak comparing to this.

Tomorrow i will try some parametric eq.

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escapemcp
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Re: 36" THT Low Profile, Warning lots of coffin pictures

#33 Post by escapemcp »

El dillo wrote:My experience so far...

It sounds great :D , a whole new dimension.... So much power and dynamic.
Control and detail, my old subs sounds weak comparing to this.
Heh, heh. Innit! :) :noob: :fruit:

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Tom Smit
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Re: 36" THT Low Profile, Warning lots of coffin pictures

#34 Post by Tom Smit »

El dillo wrote:My experience so far...

It sounds great :D , a whole new dimension.... So much power and dynamic.
Control and detail, my old subs sounds weak comparing to this.
.
:clap: :clap: :clap:
TomS

Rich4349
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Re: 36" THT Low Profile, Warning lots of coffin pictures

#35 Post by Rich4349 »

Bill Fitzmaurice wrote:
Rich4349 wrote: Then place the mic between the mouth and the wall?
Only if that's your usual listening position. :shock:
It has been, on occasion! (Lie down on a t-60 sometime with your head at the business end. Make sure to attenuate as needed! I recommend Blue Man Group / Venus Hum's "I Feel Love."
/end threadjack/
2 DR250s, 2 27" Lab15 T-60s, 2 30" Neo Titan 39s, 1 Autotuba...and looking for more!

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Radian
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Re: 36" THT Low Profile, Warning lots of coffin pictures

#36 Post by Radian »

Rich4349 wrote:Lie down on a t-60
:lol: That's one that horn enthusiasts can smile about.
Good food, good people, good times.

4 - AT
1 - TT
1 - THT Slim
2 - SLA Pro 4x6 Alphalite

El dillo
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Re: 36" THT Low Profile, Warning lots of coffin pictures

#37 Post by El dillo »

ok, some more measurement sweeps at listening position.
10-150hz, scale 50-100dB (2dB between each line) no smoothing.


Image


And with basstraps...

It evens the dip at 50hz and takes down 55hz peak.

Image


And some parametric eq...

Image

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shawn_g
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Re: 36" THT Low Profile, Warning lots of coffin pictures

#38 Post by shawn_g »

That last chart looks great. I need to build one of these sometime soon.

El dillo
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Re: 36" THT Low Profile, Warning lots of coffin pictures

#39 Post by El dillo »

shawn_g wrote:That last chart looks great. I need to build one of these sometime soon.
I can really recomend building one :D

El dillo
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Re: 36" THT Low Profile, Warning lots of coffin pictures

#40 Post by El dillo »

Some follow up measurements with EQ.

Image
Image

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Tom Smit
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Re: 36" THT Low Profile, Warning lots of coffin pictures

#41 Post by Tom Smit »

That dip at ~82 hz, is it due to mic location?
TomS

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Bill Fitzmaurice
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Re: 36" THT Low Profile, Warning lots of coffin pictures

#42 Post by Bill Fitzmaurice »

Tom Smit wrote:That dip at ~82 hz, is it due to mic location?
Probably, it indicates a 3.4 foot distance from either the mic or the speaker to a boundary.

El dillo
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Re: 36" THT Low Profile, Warning lots of coffin pictures

#43 Post by El dillo »

Bill Fitzmaurice wrote:
Tom Smit wrote:That dip at ~82 hz, is it due to mic location?
Probably, it indicates a 3.4 foot distance from either the mic or the speaker to a boundary.
Mic (UMIK-1) was at listening position about 40cm from backwall and THT in front corner standing up shooting into celing about 65,5cm from ceiling.

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Bill Fitzmaurice
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Re: 36" THT Low Profile, Warning lots of coffin pictures

#44 Post by Bill Fitzmaurice »

El dillo wrote: Mic (UMIK-1) was at listening position about 40cm from backwall .
That's probably the source of the dip. Move the mic further or closer to the wall to be sure. LP placement is like sub placement, you should be either very close to or very far from walls.

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Tom Smit
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Re: 36" THT Low Profile, Warning lots of coffin pictures

#45 Post by Tom Smit »

Thinking out loud:
40 cm equals 15 3/4 inches, a hair over 1 foot.
65.5 cm equals 25 3/4 inches, a hair over 2 feet.
1/4 of an 82 hz sound wave is 3.4 feet, or 41 1/4 inches.

How far is the mic from the THT?
TomS

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