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Old 24th September 2012, 01:00 AM   #21
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Tad drivers definitely increase cost. Actually bet it sounds super. If he did a good job, then 7K retail is good, as he has 3K in materials. CNC work on horns have to be factored. We were simply commenting on ability to DIY cheaper. Olsen is doing a 41616B/radian748/azure horn for about $1500 DIY. Pay no attention to ZM. He's CRAZY!

Edit:
I would think a F5T V2 would push these things all day without breaking a sweat. You are definitely in HE territory, although I wonder how they would sound with lower DF amps.
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Old 24th September 2012, 01:17 AM   #22
dazed2 is offline dazed2  Canada
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yep the TAD-1601b he used were $1500, the horns (something that you would buy unless you had a CNC) is another $1500, the compression drivers are another well the 4001 are discontinued, and in my friends case he used BMS dual concentric which is another $800. then the unobtanium crossover which unless you get it from diycoax welll they are another few hundred, and you haven't even build the cabinet yet

Yeah the F5T V2 would be great, but as I said... it would be a new case as I don't think I have enough heat sink to handle 4 MOSFETs per channel. Let alone a bigger transformer and more caps Thats why I was very surprised my regular F5 (without current limit) was driving these monsters extremely well! concert level volumes with plenty of bass. Oh yeah note I have about 188000uF caps.

So... would just adding the diode to the source resistor suffice and be ok on the regular F5?

Last edited by dazed2; 24th September 2012 at 01:21 AM.
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Old 24th September 2012, 01:25 AM   #23
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It will help. Probably getting to point of being voltage limited. Shouldn tne an issue withthose efficiency numvers. All i can sayis, dont skimp on amps after dropping 7k for speaks.
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Old 24th September 2012, 01:38 AM   #24
dazed2 is offline dazed2  Canada
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Yeah I don't think I'm going to be building those.... it is afterall $6-7K!

But isn't it comforting to be able to know that the F5 can and will drive TAD 2402's

Last edited by dazed2; 24th September 2012 at 01:41 AM.
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Old 24th September 2012, 03:26 AM   #25
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Yeah 7K is really not all that unbelieveable, line array with 6.5" Scan speak Illuminator drivers X 9 per side with BG RD75 would be around 7K without crossovers or amplification in Canada.
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Old 24th September 2012, 04:57 PM   #26
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Back here: Lazy Man's Balanced F5? the OP asks about the diode and the 20 amps...

20 amps will never be required unless you have a low Z load.

It's P = I^2 R which of course is going be limited by E, the maximum voltage swing, which is governed by the power supply voltage...

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Old 26th September 2012, 06:14 PM   #27
dazed2 is offline dazed2  Canada
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Good point bear, I was thinking that in the back of my mind but illustrating that just seems to help more... But I guess what it means is that if for some reason I have a impeadance load of some crazy speaker running big bass passages of 1ohm the extra diode will allow the high current requirement at the current 24V rail right?

Does this also mean that if I put a diode in there anyways it will never be used, even on normal loads? Meaning, I wonder if it will improve anything to punch dynamics etc etc. if the speakers never dip to below 2ohm.
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Old 27th October 2012, 04:23 AM   #28
BigE is offline BigE  Canada
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Quote:
Originally Posted by AndrewT View Post
The balanced version of the F5t achieves similar by increasing the output stage pairs cf. the original F5.
Isn't that the lazy man's balanced F5?

If all of the transistors in the original F5 are matched, would it then be considered balanced?
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Old 27th October 2012, 10:29 AM   #29
AndrewT is offline AndrewT  Scotland
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Big E,
read the F5t and the F5x, Read about balanced amplifiers. Read about bridged amplifiers.
Two F5 in bridged format do not make a balanced amplifier.
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