Loudspeaker Designs and Articles for the DIY Enthusiast
Invictus: (adj.) Incapable of being conquered, overcome, or subdued. Invincible.
Synonyms: unbeatable, unconquerable,  invulnerable, unshakable, indomitable,
impregnable, unassailable, insuperable, indestructible, supreme, insurmountable,
Listening Impressions:

I was really impressed with the sound of the Invictus. Like its namesake, it can take anything you want to throw at it, as loud as you want it, and come back
for more. At the same time, when called upon, it can reproduce fine detail with all the nuance and delicacy of a Stradivarius. The Revelator woofers have
always been my favorite for reproduction of all things percussive, and the CSS tweeter it quite impressive as well. Together they provide a depth and
synergy few 2 ways can match. Everything from tympani to plucked strings are reproduced with a natural quality that few other drivers can match. Not only is
the acoustic guitar reproduced well, but you'd swear you can tell which brand of strings he used. Of particular note is how strikingly accurate brushes are
reproduced. Apparently  this must be a difficult feat, as snare brush work on many tweeters end up just sounding like hiss. With the Invictus, I can hear each
individual brush spokes on the snare head.

Bass is very deep and impressive for a 7" driver, and reproduction down into the high 20's is audible in the MLTL version, and audible well into the lower
40's with the sealed variant. Yet the bass is quite taut and has nice impact. This design will play at much higher SPL's than many 2 way designs, and shows
little if any sign of stress or strain doing so.

The sealed version while it doesn't have the low end extension, of the MLTL, still has some impressive bass, and depending on your musical genera, may
be more than adequate for your purposes. In some ways I like its sound better, especially if you are planning to use a sub woofer with them anyway.   

Is it as good as a similarly turned out 3 way? I'd have to say 'almost'. As with any 2 way tower design, there is some inherent floor bounce dip due to the
woofer height that is easier to ameliorate with a 3 way. This is not as evident with the sealed version, so it could also be caused by the floor gain of the port,
and may be ameliorated with additional stuffing. Regardless, this is more of a sin of omission, and is easily tolerated when the designs other attributes are

For those of you who have ever wondered if the high end drivers are truly worth the additional expense: I won't attempt to sway you one way or another. I
only hope you sometime have the opportunity to decide for yourself. While the bar is constantly being raised on the capabilities of mid range drivers, I for
one, believe there is still some magic in the high end drivers that I've not found anywhere else. -Although I'm still trying.   

Copyright 2012 Curt Campbell  Free for non commercial use only.
Equipment and Software utilized in the course of my designs:

ARTA by Ivo Mateljan
DATS by Dayton Audio
LspCAD by Ingemar Johansson
OmniMic2 by Dayton Audio
Quarter Wave worksheets by Martin J. King
Links to:

Main / Design Goals

Driver Selection

Sealed tower Cabinet construction
Sealed Bookshelf cabinet construction
MLTL Cabinet Construction

Crossover Design

More Measurements

Listening Impressions
A two way design using
top shelf drivers
3 different enclosure variations