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Old 23rd June 2008, 01:30 PM   #1
SAC is offline SAC  United Kingdom
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Default TA10.1 2ohm stable???

I can see power ratings for the TA10.1 at 4 and at 6ohms but not at 2 ohms.

Should I assume it is not safe to drive a 2ohm load with this amp.

Thanks for your help!

P.S. I want to drive 2XEminence alpha 15a 4ohm editions (per channel, therefore four drivers overall) in parallel via a subwoofer line out, open baffle in fact.
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Old 23rd June 2008, 05:25 PM   #2
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You will probably get more power out of the amp if you run the speakers in series vs parallel. I know this might seem backward thinking, but the IC can only supply a limited amount of current which would be reached quickly with a 2R load.
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Old 24th June 2008, 01:57 PM   #3
SAC is offline SAC  United Kingdom
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That is interesting. I only read the basics of series and parallel recently so I'll take your word for it.

It sounds like 2ohms may be a bad idea after all.

Thanks again.


P.S. Would I better of driving 2X8ohm alpha 15a Drivers in parallel, giving 4ohm resistance, OR going with 2X4ohm alpha 15a drivers in series. I'm thinking the former.
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Old 24th June 2008, 04:09 PM   #4
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Using the two 8 ohm drivers in parallel will maximize your power output from the amp. If you're dead set on using this small amp with those speakers, and can afford it, you could use two TA10 amps, one per side, and drive each 4 ohm speaker independently.
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Old 24th June 2008, 07:24 PM   #5
SAC is offline SAC  United Kingdom
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Dcibel, I take it you think the 8ohm drivers in parallel are a better bet than the 4ohms in series. Adding another TA10.1 is an idea but then I am trying to spend my money slowly on this hobby. I was really interested to see new products from TA but there has been no word anywhere that I can find ):

Another thought, if I later want to passively cross the 8ohm alpha 15a drivers to my B200s with a 4.7mH inductor as others seem to be doing, how should I alter this to account for the 4ohm edition alpha 15a drivers, if I were to buy those that is?
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Old 25th June 2008, 09:16 PM   #6
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To answer my own question, a search on this forum seems to me to show that the inductor before the single woofer should half in size if going from 8ohms to 4ohms. Therefore, instead of using a 4.7mH inductor (after the B200) I could use a 2.5mH inductor!? Any one care to confirm this?
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Old 25th June 2008, 09:39 PM   #7
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Quote:
Originally posted by SAC
To answer my own question, a search on this forum seems to me to show that the inductor before the single woofer should half in size if going from 8ohms to 4ohms. Therefore, instead of using a 4.7mH inductor (after the B200) I could use a 2.5mH inductor!? Any one care to confirm this?
That's correct; half the impedance would require half the inductor value.

Here is a simple crossover you can play with......

http://www.lalena.com/Audio/Calculator/XOver/
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Old 26th June 2008, 02:00 PM   #8
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Thanks for the input all. I am slowly been sucked into this hobby and will have to do more study to understand the different crossovers offered to me on the lalena website link the Anonymous1 provided. I didn't originally intend to learn this stuff, and reinvent the wheel, but I'm quite fussy about my wheels

This forum is a great resource and I am glad to finally tap into it.
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