(2 x ) 20" T60: Hits the spot!

[ALAZDAK]

The HF horns are Selenium D3300-Ti 2" exit comp drivers on big ole' *erhm* -Goldwood- CD horns.

Serious love-hate relationship with them:

-breakup peaks (from drivers) fall well within audible spectrum, like a particularly noteworthy one at 11900Hz.

-...but I can confidently cross them as low as, say, 550 or 600Hz at 24 or 48 dB / oct. (I currently don't), which is cool for crude experimentation with imaging as a 'function' of directivity control, ctc spacing, etc.

-the Selenium drivers offer an incredible power response for cheap 2"-exit comp drivers, even if their impressive-looking HF response derives from breakup peaks.

-my 'custom' enclosures are a constant reminder of my lack of expertise, i.e., it didn't occur to me to flush-mount the lenses or craft a baffle with sexy roundovers when I built them.

-the Goldwood horns do violence to FR and SQ to approximate constant directivity. Off-axis FR, that which I usually hear, requires considerably different EQ than on-axis, largely due to diffraction ripple beginning as low as ~3500Hz and haunting the FR straight through its upper limits.

-...but even imperfect 90-degree horizontal dispersion is better than narrowing dispersion. Once you've used CD, there's no going back.

I plan to replace them with a pair of 18" SEOS waveguides powered by B&C DE250 drivers, vaguely in hopes that I may one day approach something like 'mid-fi.' May just be drinking the KoolAid with those, but I've reason(s) to think it's some damn good KoolAid...I will, however, keep the Seleniums/Goldwoods around for high-power gigs.



As for using T60s in such a small room,

Using a pair of 'em, rather than a lone soldier, one can manage, with the help of a decent PEQ (required), a bass response fairly free of gaping holes and huge peaks. I want to add a third next year.

Their peculiar geometry, which allows them to be stood in corners or against walls, is indispensible.

They benefit from steep crossovers and placement behind the mains, as would any relative of theirs. After experimenting with range of crossover points from 63-120Hz (thanks to the Jacks' flexibility), I came to the most frustratingly mundane conclusion possible - that 80Hz represented my best compromise between easing the load on the mains and disguising the subs' locations. The same does not hold true for high-output situations, where I cross them a tad higher.

I know I need not comment on the output capabilities of a pair of corner-loaded T60s in a sealed room the size of a prison cell, nor is it possible to provide such description without cliche. Can't hurt to try:

Shocked and delighted, Victims complain of a disturbing loss in control over the motion of the diaphragm muscle. Mid-complaint, Victims experience choppy speech, encouraging impromptu experimentation which generally employs several loud vocal monotones to verify the effect. Victims dig at their pockets frequently, mistaking the vibration of their clothing for that of their phones.

[Bas Gooiker]

Most cheaper 2" drivers are more suited for hi-mids then for high, thats why they can be crossed so low. That could be part of the reason for the break ups.

Still... killer setup for a dorm room!

[Zack Brock]

Shocked and delighted, Victims complain of a disturbing loss in control over the motion of the diaphragm muscle. Mid-complaint, Victims experience choppy speech, encouraging impromptu experimentation which generally employs several loud vocal monotones to verify the effect. Victims dig at their pockets frequently, mistaking the vibration of their clothing for that of their phones.

Now that's what I'm talking about... LOL!