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Old 19th December 2007, 09:26 AM   #21
Thawach is offline Thawach  Thailand
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The sensitivity is spec drivers are not high-low. but the spl is high-low.
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Old 19th December 2007, 09:36 AM   #22
sreten is offline sreten  United Kingdom
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Quote:
Originally posted by Thawach
94(Tweeter)-87(woffer)=7 db at 8 ohm. Ok it may be.


Thanks
Hi, add in baffle step of 4 to 5dB for the bass/mid you get -11 to -12 dB, /sreten.
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Old 19th December 2007, 09:40 AM   #23
TWOJZ is offline TWOJZ  Australia
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Quote:
Originally posted by sreten


Hi, add in baffle step of 4 to 5dB for the bass/mid you get -11 to -12 dB, /sreten.

lol
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Old 19th December 2007, 09:54 AM   #24
sreten is offline sreten  United Kingdom
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Hi,

Box sizes for an isobaric pair (need to add front compartment) :
Around 7L sealed.
Around 14L vented tuned to 36Hz (max flat) to 30Hz (max extension).

Nominal single 8 ohm driver sensitivity = efficiency = 87dB.
Parallel isobaric pair sensitivity = 87dB, efficiency = 84dB.

All 2-ways need baffle step compensation, depending on the driver
response this varies electrically, but acoustically is near 4 to 6 dB.

Consequently nominal speaker sensitivity will be around 82dB/2.83V.
This is true for a single driver or an isobaric parallel pair.

/sreten.
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Old 19th December 2007, 09:57 AM   #25
sreten is offline sreten  United Kingdom
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Quote:
Originally posted by TWOJZ

lol
OK, I'm giving up trying to help, lash up a poor pair of speakers, /sreten.
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Old 19th December 2007, 09:58 AM   #26
TWOJZ is offline TWOJZ  Australia
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Quote:
Originally posted by sreten
Hi,

Box sizes for an isobaric pair (need to add front compartment) :
Around 7L sealed.
Around 14L vented tuned to 36Hz (max flat) to 30Hz (max extension).

Nominal single 8 ohm driver sensitivity = efficiency = 87dB.
Parallel isobaric pair sensitivity = 87dB, efficiency = 84dB.

All 2-ways need baffle step compensation, depending on the driver
response this varies electrically, but acoustically is near 4 to 6 dB.

Consequently nominal speaker sensitivity will be around 82dB/2.83V.
This is true for a single driver or an isobaric parallel pair.

/sreten.

you do realise that you've just contradicted yourself yet again, right? lol
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Old 19th December 2007, 10:00 AM   #27
TWOJZ is offline TWOJZ  Australia
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Quote:
Originally posted by sreten


OK, I'm giving up trying to help, lash up a poor pair of speakers, /sreten.

its about bloody time you f*cked off!

I already said I was ignoring you
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Old 19th December 2007, 10:47 AM   #28
Thawach is offline Thawach  Thailand
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[QUOTE]Originally posted by sreten
[B]

No. For isobaric :
Parallel the same sensitivity. In series sensitivity is - 6dB.
Efficiency in both cases is - 3dB compared to a single.


Steren

The sensitivity is a specific drivers.,87 db= 87 db
I want to know where do they measure 2 drivers together.?

The sensitivity is high.
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Old 19th December 2007, 10:55 AM   #29
sreten is offline sreten  United Kingdom
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[QUOTE]Originally posted by Thawach
[B]
Quote:
Originally posted by sreten


No. For isobaric :
Parallel the same sensitivity. In series sensitivity is - 6dB.
Efficiency in both cases is - 3dB compared to a single.


Steren

The sensitivity is a specific drivers.,87 db= 87 db
I want to know where do they measure 2 drivers together.?

The sensitivity is high.

Hi,

I do not understand the question.
Sensitivity for a driver = dB/2.83V into half space.
Derivation of two drivers in any arrangement is physics.

/sreten.
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Old 19th December 2007, 11:01 AM   #30
sreten is offline sreten  United Kingdom
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Quote:
Originally posted by TWOJZ


its about bloody time you f*cked off!

I already said I was ignoring you
Quite the most moronic attitude I've come across in a while.
You claim I'm contradicting myself (again) without describing
what you think is the contradiction. There is no contradiction.

/sreten.
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