Piezos bad ?let me know-took mine out of the equation on my first
tweak, reverse the polarity on the tweeter and completely disconnect
the harsh piezo,at the Xover(just clip the lead at the 35 ohm
resitor)
the ScanSpeak 2010 seems to be a standard replacement for the
tweeter-once again with a 12 ohm resitor in parallel.
OK time for the tweak list, this is not all mine but a compilation
from other DQ10 fans must notably DMAN from AudioAsylum ( great
mentor when I began my project)
As for tweaks you can do spending little or NO money, here's a few.
1. REMOVE the super-tweeter and its associated crossover stuff. On
the
schematic, that's parts labeled R6 and 7, C7 and 8, and L5 (and the
driver,
of course). this yields a MUCH better top end with less hash in the
frequency extremes.
2. Change the phase of the tweeter. If you find the top end becomes
rather
edgy after removing the parts described in #1, then try flipping the
wires
on the tweeter. Whatever gives you the most listenable treble is the
right
way around!
3. (okay, this costs a bit of money and requires disassembly of the
crossover and most of the speaker system). Add bi-wire capability to
the
system. as you can see on the schematic (and rather obviously!), the
crossover seems to be divided between the bass/midbass and the
mid/tweeter
layouts! The lines between C2 and L1 can be split, and L1 and C2 can
be set
up their own + terminals. At the bottom of the schematic, the trace
between
each set of drivers (line joining the junction of L4, R5 and C6 can
be sent
to the - terminal of the C2 hook up, while the junction of L2 and the
midwoofer can be sent to the - terminal next to L1's + hookup.).
Got it? I
hope so! I've done this to my system, and it allows me to use a pair
of amps
(top and bottom, or vertical bi-amping) when I need "crazy loud"
volumes,
which is rare, but still, its nice to have...
4. Restuff the woofer enclosure with "acousta-stuff" dacron acoustic
stuffing,cheap and helps the bass response.
One lb per enclosure
5. Mirror imaging older non-mirrored DQ-10's.You don't nee a kit to
mirror image your DQ10's. Just remove the midrange and piezo tweeter
from the panel,drill out the rivets,turn the panel around,and put it
back together. then swap positions of the two panels,making sure to
keep everything aligned properly
6. Stands to raise the speakers up to ear level for the mids and
tweets. Mine are homemade and stand 22".
A link to Frank Van Alstines news letter-magazine ,the Jan 1982 has
info on damping,
Frank is an opiionated old curmudgeon but is knowledgable.
Well thats all folks
John
