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Post by ThomasW on Feb 10, 2011 7:42:48 GMT -7
What is wrong with the schematic, and what is an alternative? There is nothing technically wrong with the schematic. The problem is each loudspeaker is an inductor, and amplifiers don't perform their best 'seeing' loads consisting of multiple inductors all wired in series. When working with multiple drivers it's best to present the amp with a load consisting of an equal mix of drivers wired in series and parallel. And that should be done with symmetry, not something like 2 drivers in wired series then paralleled with a single driver. Doing that results in an unequal division of power between the drivers |
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Post by FOH on Feb 10, 2011 8:43:37 GMT -7
Thinking this through, utilizing six drivers, regardless of their impedances, certainly seems very do-able to me. Yes, it is an odd config, but is there a performance reason not to proceed in that direction? Chrisbee, you touched up series, vs. parallel topologies, and one being superior to another wrt resonances. I too am curious as to why one couldn't go with 6 drivers total. "There is no sensible series-parallel wiring option with 6 drivers. which offers a normal load." ....  I now see Thomas' very good explanation why. Thanks |
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dave7
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Post by dave7 on Feb 10, 2011 8:48:04 GMT -7
Thomas and Chrisbee - I've posted a "My Project" thread in hopes of picking up this discussion there...PLEASE  ibsubwoofers.proboards.com/index.cgi?board=projects&action=display&thread=1697I am a bit confused on what you are saying Thomas. Is there a wiring solution for this using a single two-channel amp? Is that second series/parallel schematic I posted more acceptable, but adding one more driver to the illustration? Sounds like you both don't like that idea, but if adding another amp is an easy solution, that's doable. Still not sure how I would do the inputs, but I haven't really put a lot of thought into it either. I should also have enough current. I have seven dedicated circuits for my A/V set-up, and each uses 10g wire in 20amp circuit. I absolutely want the best performance possible, and certainly don't want to compromise the drivers or the amp with mis-wiring it all. |
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Post by shotcaller on Mar 6, 2011 11:38:15 GMT -7
Has anyone heard anything new? I was looking to finally purchase and now I can't get any drivers???
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Post by bodhisafa on Mar 6, 2011 12:11:01 GMT -7
shotcaller,
Give the guys over at Fi a little time to work things out. They are coming out with drivers under the name blue print. As Thomas has mentioned before, it takes time from product design to birth.
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Post by ThomasW on Mar 6, 2011 21:07:10 GMT -7
Has anyone heard anything new? I was looking to finally purchase and now I can't get any drivers??? These are small companies. IIRC Fi is literally located in a strip mall (sorry no Las Vegas puns needed). So, a few people trying to do the work of many... |
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dave7
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Post by dave7 on Mar 8, 2011 19:14:14 GMT -7
I am waiting too, I just wish we had an update on the timeline.
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Post by rockrover on Mar 22, 2011 20:37:44 GMT -7
<sigh> JUST when I decided to design, model, money and WAF...No flippin Fi IB's!
So what's our options?
TIA,
--d
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Post by ThomasW on Mar 22, 2011 21:15:00 GMT -7
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Post by rockrover on Mar 23, 2011 17:44:50 GMT -7
Yea, well I just got an e-mail from Mark at Fi...No real idea on delivery of the new IB...Through Blueprint. Bummer. I've finally designed, achieved WAF, chose the drivers...Now there is ? on the ability to do this project at all (or at least this year). I'm very surprised. With the level of discovery on IB designs as THE sub(s) for HT specific applications, the lack of quality affordable drivers baffles me. Thanks for the heads up Thomas, but a $500 driver is out of the question as I want 4 each. Dang...$800 for 4ea Fi's was the ticket. <sigh>. Wait it is. --D |
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Post by stockmonkey on Mar 31, 2011 14:47:32 GMT -7
While IB's are becoming more popular and getting more recognition - I doubt that they are a very significant portion of sales even within the DIY Community.
That being said, I wish Blueprint would get the site up - and come out with the 22" IB drivers. Id really like to change from the 18's to the 22's but to do it easily I'm going to have to do it soon before everything is installed.
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Post by chrisbee on Mar 31, 2011 22:24:48 GMT -7
While IB's are becoming more popular and getting more recognition - I doubt that they are a very significant portion of sales even within the DIY Community. I wouldn't be too sure that every IB is documented here. There are umpteen reasons why people don't want their build activities to be exposed online. Others have years of experience on other forums and feel more at home discussing their projects elsewhere. Lurkers are always vastly more numerous than the tiny number of regular user names seen on any forum. If Fi and AE had to survive on the IBs mentioned here they wouldn't bother turning them out at any price.  |
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Post by bodhisafa on Apr 1, 2011 8:01:47 GMT -7
I seen several individuals mention or refer to this driver from different forums, the name usually comes up with comparison to TC Sounds lms drivers. Are these auras as good as the 5400 from TC? |
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Post by ThomasW on Apr 1, 2011 9:14:07 GMT -7
Are these auras as good as the 5400 from TC? Who knows? I was being sarcastic. Neither driver Aura or 5400 makes sense for an IB unless one lights their cigars with $100 bills ....... |
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Post by stockmonkey on Apr 1, 2011 9:30:43 GMT -7
I wouldn't be too sure that every IB is documented here. There are umpteen reasons why people don't want their build activities to be exposed online. Others have years of experience on other forums and feel more at home discussing their projects elsewhere. Lurkers are always vastly more numerous than the tiny number of regular user names seen on any forum. If Fi and AE had to survive on the IBs mentioned here they wouldn't bother turning them out at any price. I would think that only a small fraction of IB Builds are listed here - and I have seen quite a few IB's on other forums that are not listed here. - All I am saying is that compared to the traditional DIY market and the Car audio market, IB has got to be a small percentage of sales. I'm sure FI sells a lot more drivers to the car audio market and am only supposing that the blueprint site is not as high priority. |
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Post by chrisbee on Apr 1, 2011 9:34:35 GMT -7
No argument from me.
In a perfect world somebody would step in to fill the vacuum.
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