TS > TS > Why would you use more than 2 crossovers, or run a system TS > that
TS > large without a limiter for protection?
TS > LS> Well i run multi-crossovers for alot of reasons, when i had all the
TS > amps
TS > LS> patched into one crossover, when one amp clipped, the
TS > LS> other amps emitted a slight popping noise which was
TS > LS> enough to get through the subsonic filter and cause
TS > LS> the cones on the speakers to slam into the front steel
TS > Sounds like a poor protection circuit design on the amps.
TS > You could also use a DA for buffering, which would likely
TS > be more stable than several crossovers and cost less.  It's
TS > amazing where they cut corners on some products, including
TS > stuff sold as pro gear.
TS >
Well, i found something very interesting when i moved my amps onto a common 
AC breaker panel.  Every time ONE amp clipped, the line takes a drop as i 
figured out the amps output stage tried to stop the back EMF from the woofer 
and the woofer saw the amp as a complete short circuit on a clip blink.  This 
is why the breakers on my speaker cabinets shut off when i drive a 800 watt 
speaker at 300 watts into a bit of clipping.  When i run the 800 watt speaker 
at 900 watts into clipping, the breakers on the speaker cabinets do not shut 
off anymore.  Damnest problem i ever saw.
TS > LS> grilles on my yamaha 4115-II's.  With a balanced line
TS > LS> i can push the mixer higher because i lifted the
TS > LS> negative on the balanced xlr lines.  Makes the mixer
TS > LS> go higher, and the amps clip exactly when i push or
TS > LS> boost another 3db of say 40hz to 110 hz when the mixer is 100
TS > percent
TS > Either your equipment doesn't use normal electronic design
TS > or you're doing something that should give less headroom,
TS > not more.
Well, in english, i ran unbalanced source to balanced amps.  This was why i 
could go higher on the master out feeds from the mixer.  I just did the 
wiring like so:
RCA jack red positive, shield negative.      XLR end, ground not connected 
ut
                                             negative from RCA shield goes to
                                             negative on XLR, or ring on 1/4"
                                             plug.  Positive from rca goes to
                                             tip of 1/4 balanced or positive
                                             of XLR plug.
I found a standardized conflict when i ran my Crown amps, my AudioPro amps, 
and the new QSC amps i picked up.  The Crown wants the balanced 1/4" to have 
the positive on the ring of the 1/4" plug.  Same with the QSC.  However, the 
AudioPro amps want the positive on the 1/4" balanced connectors to be the tip 
of the plug.  Is there a standard for connecting racks of amplifiers together 
out there?  I have dealt with Yamaha amplifiers connected with Crown 
connected with AudioPro connected with QSC and i had to reverse the phase on 
alot of banana jacks to get the sound straight.
Laszlo Sokolai
Team ANTI-Windows95/PRO-OS2/PRO-UNIX/PRO-XENIX/PRO-DOS
lsokolai@bbs42.com
lsokolai@albedo.net
lsokolai@roxanne.bbs42.com
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