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Bose 802C

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JChuchla

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Mar 25, 2000, 3:00:00 AM3/25/00
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There is an ongoing debate in my company as to the function of the bose 802C
system controller. as we are an Audio company we lost the bose documentation
upon unpacking the equipment at time of purchase. what exactly does it
do....but more importantly than the function how is it to be hooked in. some
people say it needs to be in an FX loop wheras others say it needs to be inline
between the out of the mix and the amps. since i really don't know what it
does i don't know what is the proper placement of the processor. though
whatever it does it seems to make more sense to put it just b4 the amps.
I've been told it's a crossover, an EQ, and a filter. what the hell is it?
all i know is that it sounds much better when it's used. and when using a
system with 4 802s and 2 302s what do you reccomend for amp power(both for
single amp and bi-amped operation)
hoping to kill a few arguments with your answers so they better be good
--Jon--

Lord Valve

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Mar 25, 2000, 3:00:00 AM3/25/00
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The controller is an active EQ; it makes up for deficiencies in the drivers.
(It's how they get fairly respectable bass from those itty-bitty speakers.)
You don't want to run the controller in the effects loop; effects loops are
for parallel processors like digital reverb units. The system controller
is a serial processor; it must process *all* of the signal. The usual place
for it is right before the power amplifier(s). Use a minimum of 250 watts
per 802. Twice that much (minimum, remember) for each sub. You can
stop reading now; everything else on this thread will be flames. ;-)
LV

Peter Larsen

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Mar 25, 2000, 3:00:00 AM3/25/00
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JChuchla wrote:

> There is an ongoing debate in my company as to the function of the bose 802C
> system controller. as we are an Audio company we lost the bose documentation
> upon unpacking the equipment at time of purchase.

OK, you're "a company" and you don't have standard procedures for
receiving and unpacking? - I'll go for the shortest typing: it is like
this - uhm - that the manufacturer is the one to ask for a manual, they
may provide it as a sparepart, they may provide it as a courtesy. In
principle they are the ones that KNOW what that specific version of a
device called "a controller" does. If they had just called it the crappy
box with our speakers that boosts the treble 20 dB so that it appears as
if we had in fact used wideband speakers and not midrange speakers then
it had been easy, but as soon as a device is called "a controller" they
you should not guess, you should not extrapolate from what people tell
you, you should ask the manufacturer what that specific version of the
contraption does and how it should be used. If you want to stay in
business, you should also wise up, not only on your procedures but also
on your knowhow. I have skipped your other questions, I don't know if my
answers would be good enough, it is a matter of product specific knowhow
that I do not have.


Kind regards

Peter Larsen


--
******************************************************************
* This posting handcrafted by Peter Larsen, pla...@teliamail.dk *
* My homepage is at: http://w1.1358.telia.com/~u135801844/ *
******************************************************************

John Matheson

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Mar 25, 2000, 3:00:00 AM3/25/00
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Filter - removes subsonics (in Bose's case from 50Hz down) from the
signal.

Equaliser - provides heaps of shaped bass and treble boost for the
802's and ~110 Hz boost for the 302's to make up for the inherent
defficiencies in the drivers/boxes.

Crossover - in active crossover mode devides the signal between the
amplifiers for 802's and 302's and alters the equalisation accordingly.

The 802C should ALWAYS be the last thing before the amplifier(s). From
memory there are silk screened system diagrams on the 802C lid with the
three different possible configurations, ie 1. 802's full range, 2.
802's plus 302's passive crossover, and 3. 802's plus 302's actively
crossed (the latter requires additional amplifiers). What it does
depends entirely only what holes you plug jacks into!

The 302 sub doesn't go any lower in frequency than the 802's on their
own(!), but it serves to add low frequency headroom and remove the
excursion from the 802 drivers which otherwise shit themselves on every
puff of breath or mid bass note. Active crossover is MUCH better than
passive if using the 302's. Then again, almost anything else is MUCH
better than 802/302's.

Hope this helps.

In article <20000325032130...@ng-fz1.aol.com>,


jchu...@aol.com (JChuchla) wrote:
> There is an ongoing debate in my company as to the function of the
bose 802C
> system controller. as we are an Audio company we lost the bose
documentation

>
--
John Matheson - The opinions expressed above are my
own - but if you want to know where I work:
VAF Research - http://www.vaf.com.au/


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