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Multi-Way Conventional loudspeakers with crossovers

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Old 11th December 2012, 09:42 PM   #91
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Yes, smoothed, 1/3 octave which i think is industry standard, this is the raw totaly untampered measurement.

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Old 12th December 2012, 11:14 AM   #92
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Smoothed or even averaged may be what industry does to sell drivers, but for adjusting speakers it is no good.

The dip @ 2Khz could be euphonic, certainly at higher SPL, but you might still want to get rid of it to get an uncoloured sound. There appears to be partial cancellation going on in the xover region.
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Old 12th December 2012, 04:19 PM   #93
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Smile human hearing

hi all,
based on the 1/3 octave in room measurement , as suggest and studied with numerous listening test in scientific method, I think your speaker has too much energy in the two last octave. Mueller suggest a slight pendence to the right of about 6 dB from 100 to 20 KHz , this curve give you the most natural listen .

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Old 12th December 2012, 04:31 PM   #94
ra7 is offline ra7  United States
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Ingvar, that is a 90 db scale with 5 db divisions -- too large. The variations, even in the smoothed response are very large. Post the gated on-axis measurement, with the gate at about 200 or 300 Hz.
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Old 14th January 2013, 10:17 PM   #95
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Well, now that I have all drivers connected in phase the thread title seems correct to me.

First impression was just
The bass was almost overwhelming, and chest slam like no other speaker with just 6.5" drivers.

I've spent the last two hours with all lights off, computer screen off, sitting in a nice chair with a merino sheepskin over my body just enjoying music. My ears start distorting way before the speaker does, dynamics are awesome and soundstage is great!

As soon as I turn 18 (one week left) and I can order stuff online I'll make sure to order a pair of Sonic Design speaker pads because I feel that a lot of energy is transfered to the floor. The pads should improve the bass and lower mids a lot I suppose.
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Old 16th January 2013, 07:11 AM   #96
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Don´t worry about the phase misstake, as You´ve read in the Bearthread i´ve
connected things in strange, sometimes utterly stupid ways.

Putting absorbing feet in the mail today.
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Old 16th January 2013, 08:52 AM   #97
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glad you like them, but 'chest slam' is perhaps an exaggeration or misinterpretation.

Do you have Pine floorboards? Perhaps its a case of 'pine floor resonance causing ches slam'?

I experienced a similar thing once, a tremendous chest slam around 80hz. Once the boxes were on spikes, bass was taught and controlled and thd 'slam' was gone.
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Old 16th January 2013, 05:08 PM   #98
tsiros is offline tsiros  Greece
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room resonating is highly probable, rooms' dimensions *generally* are somewhere around there. (my ~10'x9'x11' has various booms from 70 to 100Hz)
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Old 16th January 2013, 05:12 PM   #99
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Quote:
Originally Posted by Rullknufs View Post
My ears start distorting way before the speaker does
air is a non-linear medium, especially as spl goes high.

your ears don't distort as much, they saturate *relatively smoothly* (at louder levels you tend to perceive any sound at the same loudness, eg, from 100to106 you perceive a smaller difference than from 80to86 even though it is objectively the *same* difference). the air though *does* distort and it is more and more significant the louder it is at the speaker and the further you are from the speaker.
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Old 24th January 2013, 08:48 PM   #100
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Quote:
Originally Posted by ingvar ahlberg View Post
Putting absorbing feet in the mail today.
Did the shipping company eat the absorbing feet again? :O

Quote:
Originally Posted by mondogenerator View Post
glad you like them, but 'chest slam' is perhaps an exaggeration or misinterpretation.

Do you have Pine floorboards? Perhaps its a case of 'pine floor resonance causing ches slam'?

I experienced a similar thing once, a tremendous chest slam around 80hz. Once the boxes were on spikes, bass was taught and controlled and thd 'slam' was gone.
Well, I can feel it in my chest so chest slam is appropriate. Not like the chest slam at live concerts but it is noticable.
I'm not entirely sure what the floor is made of. It looks like birch but I'm pretty sure it's not wood, more like some laminate or whatever it's called. The speakers are standing on some particle board subwoofer at the moment.
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