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.
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.sreten said: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.
you do realise that you've just contradicted yourself yet again, right? lol
Sreten
the Symmetry loudspeaker have two woffers work together.
The sound level is higher (6 db). But the sensitivity of the
woofers be the same. If you have two woffers wire will be wired in series(16 ohm). It means the sound level is lower than. But the sensitivity of the woofers be the same.
Thanks
Thawach
the Symmetry loudspeaker have two woffers work together.
The sound level is higher (6 db). But the sensitivity of the
woofers be the same. If you have two woffers wire will be wired in series(16 ohm). It means the sound level is lower than. But the sensitivity of the woofers be the same.
Thanks
Thawach
Thawach said:Sreten
the Symmetry loudspeaker have two woffers work together.
The sound level is higher (6 db). But the sensitivity of the
woofers be the same. If you have two woffers wire will be
wired in series(16 ohm). It means the sound level is lower than.
But the sensitivity of the woofers be the same.
Thanks
Thawach
Hi,
For two drivers (not isobaric) :
Radiation efficiency increases by 3dB, efficiency = + 3dB.
Wired in parallel sensitivity is + 6dB compared to a single driver.
Wired in series sensitivity is the same as a single driver.
/sreten.
TWOJZ said:Thawach, you're wasting your time talking to sreten,
he keeps contradicting himself, and doesn't seem to
really know what he's talking about.
But let him go on, its quite entertaining
Hi,
Sadly the reverse is the case, and your arrogance in your
ignorance I find quite tedious rather than humorous. It
seems I am being forced into wasting my time with you
when I was trying to help, and I suggest you do not foist
your ill-informed and innacurate opinions on others.
FWIW :
The efficiency of an array of n drivers increases by 10log
if they are wired for equal power - the impedance does not matter.
The sensitivity of said array varies depending on the impedance.
The efficiency of n drivers all isobaric decreases by 10log
.There are no contradictions in the previous information given.
Given the concepts of senstivity and efficiency I've stated it
as simply as possible, anyone who thinks I'm making it difficult
must be mis-understanding something along the way.
/sreten.
Thawach said:
Hi,
I am not sure what you exactly mean and are exactly asking.
Why talk about BSC ? Why not ? It is standard design practise.
The answer to the first post is 7dB in terms of the question.
But in reality it is not right, but it seems TWOJZ does not care.
Or care that what is correct he appears to think is nonsense.
/sreten.
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