Hi Duke.
I'm a big fan of your designs, and I'm hoping to get one or two of your cabs soon, but I haven't decided on which ones yet, so I have a question I was hoping you could answer...
Earlier in this thread I think I saw an equation similar to this:
TC112 < TC115 < TC212
where the difference between each cab was about 3db...
Now I'm wondering how the TC118 and the Hathors 1505 and 1855 would fit in that equation volume wise...
Please correct me if I'm wrong, but It's my understanding that the Hathor 1203 is a bit softer than the TC112, and that the Hathor 1855 is a bit louder than the TC118, but I wonder how do they compare, especially to the TC212, in terms of loudness?
If anyone else can chime in, please do so, I would appreciate it...
Thanks for your kind words.
The Hathor 1203 probably comes across as slightly louder than the Thunderchild 112 when the midrange switch is in the "growly" position, for the same wattage input. The current version of the Thunderchild 112, version 3, has the "4/8 ohm" switch, and is probably slightly louder for the same voltage input (that is, the same volume control setting on your amp) when it's in "4 ohm" mode, because it will be getting more wattage.
The Hathor 1505 is the most efficient cab I make, and the Thunderchild 115v3 would be the same except that it doesn't have the upper-mid peak that the Hathor 1505 has. But with the midrange "smoothed" on the Hathor 1505, they are the same efficiency. Both are in the same maximum SPL ballpark as the TC212, though they take less watts to get there.
At the moment it looks like the Hathor 1855 will be replaced by the Hathor 1866, because I want a little big more out of the mids, and it will have a tweeter so it will be a three-way. In maximum loudness the Hathor 1866 will be comparable to the Hathor 1505 and Thunderchild 212, but it will take more watts to get there, and in return will "punch" a bit harder.
I don't get many orders for the Thunderchild 118, and the Thunderchild 115 will go louder and has more versatile voicing via its switches, so the TC118 will probably be discontinued.
All of that being said, the differences between cabs that are close to one another in efficiency and/or max SPL is probably pretty small. With the new custom 15" woofer that I'm using in the Hathor 1505 and Thunderchild 115 cabs, they are now probably in the same ballpark as the Thunderchild 212 as far as max SPL.
So if look at efficiency (SPL per watt), it probably goes like this: Birdhaus 46 < TC112/H1203 < H1866 < TC212/H212 < TC115/H1505.
If we look at maximum SPL, probably like this: Birdhaus 46 < TC112/H1203 < H1866/TC212/H212/TC115/H1505.
Yes, I'm putting the Birdhaus 46 and Hathor 212 in there, even though they're not "officially" out yet. Their inclusion makes these relative rankings more complete.
I'm pretty sure that Hathors 1866, 212, and 1505, and Thunderchilds 212 and 115v3, are within about 1 dB of one another in average broadband SPL, though the Hathors cab be louder in the mids than the Thunderchild cabs. The Hathor 1866 will have the strongest bottom end, followed by 212's, and then the single 15's. While your intuition might predict that an 18" woofer will have a soft bottom end, in the 1866 I'm using a woofer with a motor that's about three times as powerful as the Kappalite motor in my 12's and 15's, so it hits pretty hard.