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Old 16th February 2012, 06:12 PM   #111
labjr is offline labjr  United States
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Originally Posted by flg View Post
And, good vias!
just my 2cents
The best vias are no vias.
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Old 16th February 2012, 06:21 PM   #112
lhquam is offline lhquam  United States
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The best vias are no vias.
Vias with component wires through them are ok, otherwise minimize vias.
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Old 16th February 2012, 06:47 PM   #113
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What's a vias?
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Old 16th February 2012, 07:11 PM   #114
a.wayne is offline a.wayne  United States
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Sounds like vad news .....
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Old 16th February 2012, 07:49 PM   #115
flg is offline flg  United States
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Vias are the plated through holes or other plated holes designed to be used for thru hole parts mounting or to carry current and or heat to other layers of the board.
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Old 16th February 2012, 08:34 PM   #116
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Quote:
Originally Posted by flg View Post
other plated holes
e.g. Via Rivets.

(gawd, me such a relic)
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Old 16th February 2012, 09:19 PM   #117
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Originally Posted by Bksabath View Post
Hi mate.

<snip>

In my case I have Polk LS15i nominal 4 homs in my smalish room 87dB is fine after Pano test I will rarely ask the F5 to give me more than 12 rms out

The music I listen to is mostly not Classical so dinamic range is not big issue.
<snip>
Actually, and for the record, generally one needs MORE headroom for classical recordings than most other. I'd suggest about 20dB above average listening level, whatever that power level is.

So, if that is 1 watt, then 64 watts.
But that's only if ur average is actually 1 watt!
What if it is 2 watts? Then 128 watts.
For 4 watts? Only 256 watts.
Hmmm...

Well the good news is that most peaks that are 20dB up from average are actually transients, and end up in the tweeters, and with an amp like the F5 tend to have nicely rounded clipped waveforms (as do true triode tube amps) so the effect is more of compression (if heard at all) than hard clipping.

Imo, this is the reason that people say that tube or triode amps "sound" more powerful than they really are...

In the system that I would use an F5 (and I will be, and it will happen) the compression driver on the widerange horn is 109dB/1w/1m rated. So, my average listening level is under 1 watt!! So, my "first watt" is really critical and the headroom is a non-issue. Of course merely having a compression driver does not in and of itself assure that you will like anything about how it sounds, it's more complex than just using a compression driver...

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Old 16th February 2012, 10:42 PM   #118
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Quote:
Originally Posted by bear View Post
Actually, and for the record, generally one needs MORE headroom for classical recordings _-_-bear
Exactley the same ting I did say
I do not listen to much classical music so I do not need the head room.

The 20dB is prety much right as evveribody know

I am not realy shure about the tweeter bit especialy when sometink like 1812 is on the spinner but have to agree with the compression part.

Or if you prefer this is another of the many variable involved in the compromises one can choose to make or not to when building the amplifier.


From what I have experienced the big party popper for any amp is clipping pheraps current clipping more than voltagge clipping goes hand in hand with listening fatigue.

Since I had the F5 I find myself listening for longher periods of time and some how the volume keeps going up to the point that I get suprised that I have to shout Just to keep a conversation going.

Last edited by Bksabath; 16th February 2012 at 11:07 PM.
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Old 16th February 2012, 11:27 PM   #119
a.wayne is offline a.wayne  United States
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You still need 10 db min for regular recordings, say the Eagles for eg ....
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Old 16th February 2012, 11:45 PM   #120
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Originally Posted by a.wayne View Post
You still need 10 db min for regular recordings, say the Eagles for eg ....
Need to sleep over this

Last edited by Bksabath; 16th February 2012 at 11:55 PM.
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