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AudioKinesis Cabs Part VI...

#381
PDGood said:
Hey, Duke. Are there pics of the 1203 somewhere?
Click to expand...

Here are the Hathors 1203 and 1855:

gi.mpl?u=2112&f=Hathors_1203_and_1855.jpg


I'll shoot a couple more later tonight.
 
#390
nostatic said:
I'm increasingly convinced that H1203 on top of a TC112 could be pretty devastating. Same 14x14 footprint, smooth horn, some grind from the paper cone...
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Ya mean, something like this?

gi.mpl?u=2112&f=Hathor_1203_2B_Thunderchild_112-8.jpg


Actually the H1203 (it now has its own abbreviation!!) is 1/2" shallower in depth, but it's still a good solid sit.

Jeff Scott said:
I saw JT perform that in '73! :bassist: Passion Play tour.
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I am officially envious. Back in '73, I didn't even know Jethro Tull existed. Did manage to catch a few shows in the late 70's and 80's.

kesslari said:
You could build a small park bench to sit it on...
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*wipes nose on sleeve*
 
#391
monsterthompson said:
the more i think about it, the more the port option of your cabs interests me.
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Thank you, I do think that was one of my better ideas. Stole it from my home audio speakers, where the ability to change the port tuning has salvaged more than one sale for me when the room's acoustics were way different from what I was expecting.

Relevant photo coming tomorrow, along with some narrative on the subject.

nostatic said:
Pair of 1203s, top one upside down.
Click to expand...

Photo coming tomorrow, but you might want to consider using them both rightside-up, as that top cab's open format mid-chamber is nice to take advantage of. Of course once your check clears, you can stack 'em however you like.
 
#395
DukeLeJeune said:
Ya mean, something like this?

gi.mpl?u=2112&f=Hathor_1203_2B_Thunderchild_112-8.jpg


Actually the H1203 (it now has its own abbreviation!!) is 1/2" shallower in depth, but it's still a good solid sit.



I am officially envious. Back in '73, I didn't even know Jethro Tull existed. Did manage to catch a few shows in the late 70's and 80's.



*wipes nose on sleeve*
Click to expand...

serious temptation.

if you really wanna be pissed: saw the aqualung tour ;-)

amazing show.
 
#396
DukeLeJeune said:
.

Photo coming tomorrow, but you might want to consider using them both rightside-up, as that top cab's open format mid-chamber is nice to take advantage of. Of course once your check clears, you can stack 'em however you like.
Click to expand...


Ah hadnt thought about that. I was thinking maybe add eye bolts and set them up like a tetherball setup. Natural phase shifting
 
#397
Duke, my concern with the Hathor is how the top vents will function if I drop a full sized tube head on the top. I suspect those vents will get covered and thus not function as intended. Also, how do you feel a 200w tube head would do with that beast? I know you said it can take 1,200w, so I'm curious if it will be power-hungry to get it to start singing.
 
#400
As promised, a shot of the backside of Hathors 1203 and 1855, showing some ports plugged:

gi.mpl?u=2112&f=Hathors_1203_and_1855_backside.jpg


Okay as you can see, we have the 1203's stacked, with one in sealed-box mode and the other ported. In my living room (which isn't representative of anything out in the real world), that's the configuration that sounded best. And fortunately that Kappalite woofer has enough x-max that we haven't just thrown away our excursion-limited power handling.

The ports on the 1855 are plugged on a diagonal, to maintain a symmetrical airload on the back of the cone. In theory, the larger the woofer diameter and the longer the voice coil, the more susceptible it is to cone rocking from an uneven airload (some subwoofers have double-spider suspension systems to combat cone rock, but I don't know of any that would work well in a bass cab). For those who like to geek out on driver specs (yeah baby!), here's a link:

Invalid Link Removed

As you can see, that woofer definitely need serious midrange helpage, but in turn it rewards us with a lot of capability in the bottom few octaves, AND it doesn't have any nasty peaks that would require a massive inductor to tame. So we can run it full range, and just blend in the mids.

You might also have noticed the veritable plethora of screws holding the ports in place. Both of these are very high-internal-pressure cabs, as they have long-throw woofers with powerful motors shoehorned into relatively small boxes. Those screws are to make sure we don't get air leakage underneath the port flanges.

In my living room, two ports plugged sounded best on the Hathor 1855. That gives us a tuning frequency of about 35 Hz (normal tuning frequency with all ports open is about 48 H), with a calculated F3 of 53 Hz and a fairly gentle rolloff from there down to the lower 30's (- 10 @ 31 Hz).

You'll also notice the lack of switches on the back of the 1855. This is a very high power cab, and imo the cost and weight of the crossover parts that would be needed for meaningful switchology just aren't worth it. So this cab pretty much is what it is, plus whatever your tone controls can do to it.
 

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