Posted January 02 2005 - 10:18 AM
Once again it has been a busy week and I haven't had a chance yet to reply.
Her are some answers to your questions:
There are some enclosure recommendations up on the website for the Avalanche 18 along with the other drivers. For your preferences I would recommend the 20 cubic foot enclosure tuned to 13 Hz. Going with a 700 Liter/25 ft^3 enclosure tuned to 10 Hz will only get you more output once you drop below 11 Hz. From 11 Hz on up the 20 cubic foot alignment will have a definite advantage in output. Trust me when I say that in that enclosure it wil go LOOOOWWWWW.
| Great job on these drivers. I have owned quite a few subs, and I was really impressed. |
Thanks for the very kind words about our subwoofers Brian. They were designed to play loud without a lot of power and I am glad that this is indeed what happened. As far as power ratings go, we are about as conservative as you can get. I don't post peak ratings and as you found out, it can certainly handle more power. I would rather that people fault on the side of caution when it comes to power rather than over power them. That usually translates to happy customers.
| Not sure what the mechanical throw is; I never asked Chad. |
There is 39.5 mm of clearance behind the voice coil until it hits the back plate on the Avalanche subwoofers. The Atlas subwoofers are pretty much impossible to bottom out.
| Chad actually bought one of my 1803's so he should know first hand how it compares to the Avalanche 18. |
Yes, I have gotten a LOT of questions asking how these subwoofers compare. As Brian mentioned, I do have quite a bit of experience between the two drivers. There are two Blueprint 1803's sitting in the shop here as we speak.
For a long time they were the only available very high-excurison 18 inch subwoofer that would work for home audio.
It is a touchy subject to compare your drivers with another manufacturer. However, Blueprint 1803/1804 subwoofers are apparently completely gone and can no longer be purchased new. For this reason I will be posting a couple of comparison graphs on the website showing the output differences with the same power. Prepared to be shocked.
They are two very different animals.
| Chad, you mentioned not building an ultra high excursion design with a very low Fs and exotic cone materials because of the cost. |
No, I said that "I stopped the design on an ultra-high excursion subwoofer for the time being."