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Old 16th August 2012, 11:23 PM   #371
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Disaster just means having to build something else
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Old 16th August 2012, 11:50 PM   #372
CeeVee is offline CeeVee  Portugal
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I run them a little above half rated voltage... extremely silent.
All you really need is to get the air moving a little, makes a huge difference here in Lisbon summer
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Old 16th August 2012, 11:58 PM   #373
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Absolutely. I built a box with dual 120mm fans pulling across a single 10" x12" heatsink and was able to run 300w. It got hot in the room quickly.
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Old 17th August 2012, 02:44 PM   #374
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Originally Posted by buzzforb View Post
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Very cool buzz. Looking forward to seeing how those heatsinks work when you throw a couple more pairs on there. They look like the 10" profile sinks for heatsink USA, which I was thinking of using for my build.
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Old 17th August 2012, 02:57 PM   #375
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If i go with 4 pairs, I will use a single 1R resistor and cut the bias in half. I don't need more power, so it is just a matter of whether or not I like 4pairs@400mA or 2pairs@800mA. IF I like the 4 pair, I may try 4 at higher bias as well, using monoblocks. The heatsinks are very similar to the HS USA 10", but not the same. I have the HS 10" waiting in the wings. BTW, I should be packing the kit stuff in the next week or so. Also. I should be listening to a standard vs upgraded version of the F5T tonight. Little comparison.
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Old 17th August 2012, 03:01 PM   #376
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If i go with 4 pairs, I will use a single 1R resistor and cut the bias in half. I don't need more power....
This my exact situation, i'm very curious to hear your subjective experience about these two possible choices.

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Old 17th August 2012, 03:04 PM   #377
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I hope to measure the current two pair version this weekend and then do that as well for the 4 pair version. Too much subjectivity is trouble around here.
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Old 17th August 2012, 03:28 PM   #378
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I know , the subjectivity i refer to is the comparison between a cooler running class a amp and a hotter ( better sounding ? ) one as has been expressed in many post.

I'm guessing a 4 pair one should have a cleaner punchier bass...i might be wrong

My subjective reasoning is that current delivery to load should be quicker with 4 pair but that has to be possible also by the PSU.


????? let us know

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Old 17th August 2012, 03:42 PM   #379
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Quote:
Originally Posted by buzzforb View Post
If i go with 4 pairs, I will use a single 1R resistor and cut the bias in half. I don't need more power, so it is just a matter of whether or not I like 4pairs@400mA or 2pairs@800mA. IF I like the 4 pair, I may try 4 at higher bias as well, using monoblocks. The heatsinks are very similar to the HS USA 10", but not the same. I have the HS 10" waiting in the wings. BTW, I should be packing the kit stuff in the next week or so. Also. I should be listening to a standard vs upgraded version of the F5T tonight. Little comparison.
Yes, welcome ....... 8cylinders beat 4 cylinders ... for smoothness and delivery all the time .............


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Originally Posted by buzzforb View Post
I hope to measure the current two pair version this weekend and then do that as well for the 4 pair version. Too much subjectivity is trouble around here.
Pour it on , I gotcha back bro .....
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Old 31st August 2012, 03:29 PM   #380
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hello. just got a great idè regarding P3 trimmer for this amp, and all other F5's for hat matter.
how about a multi turn panel mount pot, connected to a digital ohm meter with a smal display on the front? that way you can easely get 2 monoblocks adjusted the same.
and for a stereo amp, one gan use a stereo pot with one ohm meter and display.
what do you think? and do anyone know who can be selling ohm meteres that can be used(that you can calibrate yourself)?
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