What are the specs of a full range speaker?


I've noticed that this term is used pretty loosely around here and I'm wondering what you think of when you read it in an ad. What does "full range speaker" really mean? Is it 20Hz to 20 Khz? I've always considered it to mean a speaker that reaches down into the 30s with some weight. What's your interpretation?
macrojack
Shadorne-
Your response concerning room anomalies provides specifics where I previously had only general awareness about these problems. 10 to 20 db is a lot of variation. When you say that room equalization is limited to a small sweet spot I wonder if you mean a pinpoint or a zone across the room being localized front to back.
I currently own a pair of speakers that reach down only to about 38 Hz. They are sold and I'm awaiting a new pair with deep bass capability that is equalized. After reading your comments I'm very curious to see whether or not I wasted a lot of money.
Does anyone here have equalized bass in their speakers and what have you found? Also what are your room dimensions?
I think Shadorne is referring to equalization in the service of room correction. Which would apply as well to subwoofer equalization a la Velodyne or Vandy 5A. Do the Definitions have user-adjustable equalization?
I have a friend who has subwoofers mated to ribbon speakers in a small, very irregular room. He uses TacT, where he can read all the frequency curves reaching the single seat sweet spot. There were big dips in the upper bass area. By some repositioning and equalizing through TacT he managed to straighten things out.

Now his play back is more than reasonably flat through 25Hz, with subwoofer in place.
Macrojack

Room anomalies take place in all rooms, and with all speaker systems. The room and the speaker system are an equal partner and must be made to sing together...in harmony.

Room modes are "modal" or "non-modal" peaks and dips. Modal are room related and non-modal are speaker/seating related...ie, caused by speaker placement or seating placement in relation to room boundaries.

Modal...room treatments can help smooth these peaks and dips out a bit...a small amount of EQing can bring down some of the peaks even more. You can not EQ out a large dip (null) in freq response...move the speakers and or listening position a bit if non-modal...move around or add more room treatments as needed if the problem is modal....could be also a combo of both.

If your the conductor of a large orchestra trying to get all the sections to sing together...in harmony, and the bass instruments just won't cooperate for several reasons...Do you blame them and:

1. Get rid of them and declare the music sounds better without them anyway.

2. find out what the heck the problem is and come up with the fix.

I think some people go with #1

Dave
Dan,
The Definitions have internal amplification for the onboard subs. These have an adjustable gain control on the back of the cabinet. Zu also makes (but doesn't publicize) the Definition Pro which has heavier duty professional grade woofers and requires Bi-amplification. With this arrangement they sell you a RANE PEQ 55 digital parametric equalizer to tailor the response from 40 hz down to 16 hz. This is what I have on order. The difference in price between my old speakers and these new ones is such that I am looking for a big improvement.