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AudioKinesis Cabs Part VI...

And as an engineering school drop-out, I thank you very much for that comparison!

When I was a kid my dream was to become an aerospace engineer, but it was taking me three tries per math class and you can't get a degree like that. Not that anyone would want THAT guy designing their airplane.

One of the things I try to do is not have any one of the multiple inevitable limitations prematurely limit the entire system. So neither port compression nor excursion overload (fart-out) nor thermal compression sets in well before the others. And I try to find little things that can help here and there, like using flared ports which allow a higher air velocity before chuffing sets in, then putting those ports near the woofer's magnet, where that higher air velocity can contribute to cooling the motor.

The downside of this "balanced" approach is, less margin between the onset of audible distortion and something really bad happening, like the voice coil overheating and the magic smoke escaping. Fortunately to the best of my knowledge bass players who stumble across my high-priced cabs and buy one (new or used) are never beginners, as far as I can tell.
A piece of paper doesn't make you a real engineer, your work is what tells that story IMO. The world has plenty of people designing aircraft and related systems Duke, but there are very few people with your ability (or perhaps I should say gift) for producing bass cabinets as capable as your designs.

One more aerospace person wouldn't have made the kind of difference in that field that you have in the speaker cabinet world. On the other hand, I'll bet the luxury jet market folks would have loved to have had you designing high end passenger cabin sound systems! :)
 
And as an engineering school drop-out, I thank you very much for that comparison!

When I was a kid my dream was to become an aerospace engineer, but it was taking me three tries per math class and you can't get a degree like that. <snip>

You just described my EE college experience to a T. It took a while for me to realize that I might be in good company!
 
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Here is the B 46 as promised!
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no room here for the entire bit, but my favorite aviation joke starts with a big multi losing engines one by one and ends with an impatient passenger exclaiming " if this keeps up we'll be up here all night. " as with all great jokes, it's also part metaphor.
Before we get back on topic I'll share a few of my favorites from over the years:
Three of the most useless things in aviation are air above you, runway behind you, and fuel you decided you wouldn't need to take on board.

The only time you have too much fuel is when the aircraft is on fire.

You can readily confirm that someone missed the "gear down" step on the landing checklist when it takes full power to taxi to the terminal.
 
One more aerospace person wouldn't have made the kind of difference in that field that you have in the speaker cabinet world.

Apparently the real world of aerospace engineering is nowhere near as fulfilling as what I had cooked up in my imagination. I have friends who worked on a project for Northrop for ten years, only to lose the contract to a competitor, even though (according to my friends) their aircraft was demonstrably superior in several of the most important areas, and competitive in the others. How frustrating that must have been!

On the other hand I've gotten to work on a wide variety of projects which sank or swam on their own merits or lack thereof. Not sure I have the attention span for aerospace engineering. And none of my failures ended up on the evening news!

* * * *

Love the aviation jokes!

My step-father (a Marine aviator) used to say, "Any landing you can walk away from is a good one. And any landing they can use the aircraft again is a REALLY good one."
 
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Hey @DukeLeJeune
Question for you as I’m thinking about ordering Hathor 1533 when you resume taking orders.

In a 3 year old post about the 1533 you said the 15s are unusually efficient while the 12s are just a little less efficient such that a 1533 has about the same SPL as two H1203s in parallel. Hope I got that about right.

So if I were to parallel a 1533 and H1203T or C112 would the 12 be so overpowered as to be essentially unheard or not useful?

Sorry if you’ve covered this before, though if so I missed it.

Nice to you on here regularly again.

Ken
 
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if I were to parallel a 1533 and H1203T or C112 would the 12 be so overpowered as to be essentially unheard or not useful?

From what I understand (based on user feedback), that seems to be pretty much the case. Adding a 112 to a 15" Hathor cab makes a small difference at best.
 
I have a question mainly for those of you with Hathor 1203 and Changeling 112 cabs: How often do you use the switches on the back?

A very late response, and after the fact perhaps:

Playing my version 1 Hathor 1203 just now, I reaffirmed for myself how impactful and useful its switches are.

Specifically it is the top switch I care about most. Depending on the instrument sound, the articulation that the top switch can provide is subtle yet distinctive. If you never use it, probably you won't miss it. But once you use it with the right class of instrument sounds, you'll be glad you have the option. When I say "subtle", I mean 1. you can feel the difference as much as hear it, and 2. it presents articulation without harshness.

Just for illustration, the nearest comparison I can make among the cabinets I own is the switchable B&C tweeter in my MAS-112 (whose crossover Duke designed, I believe). In that admittedly rather different cabinet, the tweeter aims higher but is similarly subtle and even more devoid of harshness. "silken" and "sibilant" are how I tend to describe the sound.

Generalizing, then, even with just these two examples, I think there is a strong case for mature designs of bass cabinets having such a feature.

Separately, I must say how sweet, big, and open my Hathor 1203 sounds. Listening to my moody, sonorous loop this morning, of a custom Fodera 4-string fretted bass with custom J pickups, varying pickup blend and passive tone controls, played as passive without any processing except some half-speed or double-speed layers in the loop, driven by a Subway D-800+ set to sound flat, at a healthy volume, I had the sense that there was no type or nuance of timbre or dynamics that the little Hathor could not convey.

Disclaimer: I am no longer a gigging musician. Sound in itself without practical context is my only interest as a practicing musician.
 
my moody, sonorous loop this morning

What I tried to describe. Here "recorded to" an old mastering tape deck plugin, my attempt to simulate the feel of the audio through the D-800+ and Hathor 1203 as I heard it originally. You get it all: 3.5-year-old strings, accidental clicks, hum, and complete improvisation without warmup.

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From what I understand (based on user feedback), that seems to be pretty much the case. Adding a 112 to a 15" Hathor cab makes a small difference at best.

My experience was that I felt a little more presence at my back than with just the single 15, but there were a couple of bass players in the house (including Shrigg) that night, and they both agreed that the sound off the stage wasn't markedly different.

However, I can vouch for the fact that (2) of the Hathor 1203's is a serious upgrade in volume and overall sound from a single one, IMO.
 
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My experience was that I felt a little more presence at my back than with just the single 15, but there were a couple of bass players in the house (including Shrigg) that night, and they both agreed that the sound off the stage wasn't markedly different.

However, I can vouch for the fact that (2) of the Hathor 1203's is a serious upgrade in volume and overall sound from a single one, IMO.

+1

Adding my H1203 to my H1506 did not make a noticeable difference, outside of a little better monitoring on stage. I might get a second H1203 for an alternative stack to my H1506, but don't plan to pair the 15 and 12 together for future gigs. The H1506 is remarkable on its own.
 
Has anyone ever run a Hathor with a same-sized Thunderchild? You know, in the name of science? :woot:

Once. TC15 v.1 at 4 ohms, and Hathor 1533, also at 4 ohms, through a Thunderfunk 750/800. My house and furnishings were not up to the potential roar - all kinds of stuff was rattling and rumbling - so I quickly backed down and discontinued the exercise. I don't doubt it would work great, with an amp that could run at 2 ohms.