| Title: | * * Computer Music, MIDI, and Related Topics * * |
| Notice: | Conference has been write-locked. Use new version. |
| Moderator: | DYPSS1::SCHAFER |
| Created: | Thu Feb 20 1986 |
| Last Modified: | Mon Aug 29 1994 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2852 |
| Total number of notes: | 33157 |
[If this is covered somewhere else, I couldn't find it ...]
What exactly is "active equalization" as found in several of the
powered speakers, speaker/EQ systems, etc? Examples I've seen are the
EV S-200 with optional active EQ unit, I believe the Bose 901's have an
active EQ box, and some of the small powered speakers (AR Studio
Partners, for example) have active EQ built-in.
Is active EQ simply the equivalent of having a graphic EQ always set a
certain way, or does "active" imply that the EQ is constantly changing
based on the input signal?
I'm in the market for some small powererd speakers, and have read good
things about the AR Studio Partners; the review mentioned active EQ so
I thought I'd see if someone can tell me exactly what this is ...
-Jim
| T.R | Title | User | Personal Name | Date | Lines |
|---|---|---|---|---|---|
| 2353.1 | Good and Bad | OTOO01::ELLACOTT | non_teenage_mutant_ninja_bassist | Mon May 28 1990 09:11 | 14 |
Active EQ in the "BOSE" style means the processor box has a
set eq curve to compensate for the shortcomings of their speaker
system. Use the speakers without the box and they sound like doo-doo.
The main drawbacvk of some of these systems is that they usually
have to boost the bass a LOT. This uses up the headroom of your
power amp so that your top sound presure level is reduced. There
are other systems using decent sized speakers in which the processor
just smooths out the response of the speaker system. These leave
your EQ free to fix room response problems. A good example of this
is Yorkville Sound's Elite MX1000 cabs. 2x15 with a horn is each.
Power handling is 1000 watts program each. The Eq processor is stereo
and also privides the Bi-Amp capability for using a sub woofer with
it for added low end. THESE ARE LOUD!!!. Yorkville Sound is a Canadian
company who are also known as Traynor.
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| 2353.2 | STROKR::DEHAHN | Tue May 29 1990 08:32 | 23 | ||
Active eq is not used exclusively for small speakers, it is the wave of
the future for large touring systems as well. EAW KF series, EV MT-4,
Meyer MSL...all are very large, very LOUD touring systems that have a
processor associated with it.
In one way .1 is right, some speaker companies use the active box as a
band aid to lousy response. Done correctly, a processed system has many
advantages over non processed ones. Namely, a much more sophisticated
crossover network can be designed actively than passively. Once it's
designed, you just plug it in and go, no adjustments. The really good
processed systems like the EAW KF850, very little eq is needed even for
large halls. They are smaller, lighter, and mostly louder than their
non processed counterparts.
As for the AR system, they are primarily trying to get the lower octave
out of a cabinet that is not large enough to support it. You will get
bass but your headroom will suffer. That may or may not be an issue in
your application.
CdH
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| 2353.3 | FREEBE::REAUME | WEEKENDworkweekWEEKENDworkweek... | Tue May 29 1990 11:22 | 21 | |
re .1
Hey - We use the Elite system as well! We were using a JBL Cabaret
speaker system (4691B/4625) but switched over to Elites for portability
and better low-end response. The processors that come with the Elites
are specifically set up for each individual model. If I remember
right the MX-1000's handle 1000 watts. I don't think you need a
subwoofer with two 15's in there.
We use the M-600's and SW-600 in our front end and we are really
pleased with them! The M-600's have two 10" speakers and a horn
and handle 600 watts. The SW-600 subwoofers have a single 18" each
and also handle 600 watts. We already had a crossover in the rack
and were told that with it we didn't need the seperate processor
that runs around $95. From what I understand the processor will
allow the M-600 to have better bass response when not used with
the subwoofers, and functions as a crossover with the subs. The
only advantage I have on keeping my own crossover is that all
the levels and frequencies are adjustable, but on the Elites they
are not.
---/boom/---
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| 2353.4 | Next Marketing Thing - PROActive EQ! | DRUMS::FEHSKENS | len, EMA, LKG2-2/W10, DTN 226-7556 | Tue May 29 1990 17:08 | 8 |
Sometimes the term "active" is used in distinction to "passive" to mean
that an op amp is used in the circuit instead of purely passive
components (i.e., resistors, capacitors and inductors). A passive
circuit can only exhibit a loss, while an active circuit (with a power
supply) can exhibit gain.
len.
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