Small TBI Magellan Subwoofer Magic - AVS Forum
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post #1 of 13 Old 02-18-2014, 08:37 AM - Thread Starter
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Howdy....I'm pretty much astounded by what this small sub can do. Ever since I went to a 10' wide screen in my HT I've wanted to get smaller footprint subs but the pair of DIY's I had ( Dual 12" drivers in each,built by a mad speaker builder friend of mine) were just too good plus I didn't want to spend a ton of money.

I had seen TBI Magellan VIII SU demo units on ebay for a good price and their size was perfect. Not a lot of reviews but what there are are glowing. I came across a MAGELLAN VIP su, the P is for powered, on ebay for an excellent price. The original owner had purchased a pair but realized 2 was overkill. This thing has only one 6" driver and is tiny. I am amazed at what it can do. My large diy's are gone and will not be missed. The VIP su is about 71/4" tall with included spikes and 5 1/2 without. Original owner didn't us spikes as he said the cabinet is so inert they aren't needed.

They are sold direct from http://www.tbisound.com/dsp_products_subwoofers.asp


You can usually find a demo MAGELLAN VIII su unit on ebay .

As one reviewer said, I'll never use any other subwoofer.
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post #2 of 13 Old 02-18-2014, 08:44 AM
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Sorry I will only believe it when I hear it.

Shawn
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post #3 of 13 Old 02-18-2014, 04:25 PM
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The MAGELLAN VIII su is a passive sub with an 8" driver that has a "POWER HANDLING" of "150 W RMS". The one on eBay is priced at $575. That's funny. smile.gif


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post #4 of 13 Old 02-18-2014, 08:02 PM
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Quote:
Originally Posted by flickhtguru View Post

Sorry I will only believe it when I hear it.
+1. Small, goes low, has good sensitivity. You can have any two, but not all three. With a box that size and only 120w powering it no way does it go loud and low. One or the other, but not both.

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post #5 of 13 Old 02-19-2014, 06:44 AM
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To the OP: got any graphs?
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post #6 of 13 Old 02-19-2014, 07:51 AM
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To the OP: got any graphs?

There are some graphs on the website that link takes you to. Whether they are the graphs you are looking for -- I don't know.

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post #7 of 13 Old 02-21-2014, 11:25 AM
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There are some graphs on the website that link takes you to. Whether they are the graphs you are looking for -- I don't know.
Now, I'm no expert, but...

... don't these graphs look a bit weird?

http://www.tbisound.com/brochures/MAGELLANVIIIsuPerf.pdf

MAGELLANVIIIsuPerf.pdf


How can you have a negative group delay value?


I'm also not sure how the webpage blurb can say "the absolutely constant loading of the driver cone at all frequencies ... allow(s) our MAGELLAN VIII su to perform to 10Hz at full power input."

when the info lines below it say "FREQUENCY RESPONSE 12 Hz – 160 Hz (–6db)"

and the PDF brochure says "FREQUENCY RESPONSE 15Hz to 125Hz -6db (graphs are available)"

and the top graph shows it dropping off a cliff below 30Hz and it seems to indicate it's -17.5dB @ 16.07Hz?


Perhaps I'm reading it wrong but something smells funny to me...
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post #8 of 13 Old 02-21-2014, 01:06 PM
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Quote:
Originally Posted by MemX View Post


the top graph shows it dropping off a cliff below 30Hz and it seems to indicate it's -17.5dB @ 16.07Hz?
That's what it shows, and it's what one can actually expect from a box of that size. The impedance chart also shows that -6dB to 12Hz is a fantasy spec. rolleyes.gif

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post #9 of 13 Old 02-21-2014, 01:41 PM
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Quote:
Originally Posted by MemX View Post

Now, I'm no expert, but...

... don't these graphs look a bit weird?

http://www.tbisound.com/brochures/MAGELLANVIIIsuPerf.pdf

MAGELLANVIIIsuPerf.pdf


How can you have a negative group delay value?


I'm also not sure how the webpage blurb can say "the absolutely constant loading of the driver cone at all frequencies ... allow(s) our MAGELLAN VIII su to perform to 10Hz at full power input."

when the info lines below it say "FREQUENCY RESPONSE 12 Hz – 160 Hz (–6db)"

and the PDF brochure says "FREQUENCY RESPONSE 15Hz to 125Hz -6db (graphs are available)"

and the top graph shows it dropping off a cliff below 30Hz and it seems to indicate it's -17.5dB @ 16.07Hz?

Perhaps I'm reading it wrong but something smells funny to me...

Hate to be "that guy", but I didn't bother even looking at them after I read a line or two on the site. Just pointing out that there were graphs available.

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post #10 of 13 Old 05-16-2014, 04:35 PM
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I'm new here but i'm an owner and I look for the disbelievers. I want to know when a 15db drop from 30Hz to 16Hz is falling off a cliff. The last time I looked a ported box should drop off @-24db/oct not -15db/oct. The second graph is with room gain not at the port as the top graph. -12db roll off will be flattened by room if it is not too big. Typically sealed boxes achieve a -12 db roll off if they are designed well.

I doubt that anyone drew these graphs so it is what it is on group delay and why the subs blend so well. This is no resonant box and the low mass aluminum (50hz free air) driver gets the job done quickly in the sub bass region. The guy who introduced this is using it for HT discarding 4x12" drivers in a suitable box. Give him a break if you haven't experienced it.
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post #11 of 13 Old 05-21-2014, 11:23 AM
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Good to have an owner popping in to say hello!

Have you ever graphed the response in-room by using REW or similar? I think it would be interesting to see what sort of output can be achieved!
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post #12 of 13 Old 05-23-2014, 04:13 PM
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I've measured response to below 20Hz and seen levels or 100db+ at 30Hz in my moderate sized space. Really depends on room size if you need two. I'm using M8's in stereo
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post #13 of 13 Old 05-24-2014, 08:04 AM
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If you're able to post graphs that would be cool smile.gif
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