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-   -   My F5 Lives!!!!!!! (http://www.diyaudio.com/forums/pass-labs/210216-my-f5-lives.html)

dantwomey 6th April 2012 01:52 AM

My F5 Lives!!!!!!!
 
First of all, Many, many thanks to Father Pass for sharing and inspiring such an interesting hobby.

Now to my first impressions. In my system the F5 has a warm and liquid midrange that gives this amp a very lifelike smoothness. But this smoothness comes at a price. The high end is softened and less detailed and lacks the sparkle of my gainclone. If I could restore this sparkle and detail without any accompanying glare this would take the F5 up a notch for me. I can also tell that the soundstage is deeper with the F5 with artists sounding farther back. All in all a very rewarding amp that is well worth the effort.

Now for something that puzzles me. After running the F5 for a few hours I realized I was running out of power. I find this very odd because I'm running line arrays that are about 95db efficient. Time for an F5 Turbo V3 or an F6?

Regards,
Dan :)

AudioSan 6th April 2012 02:40 AM

the sound will change over the next few days.
but run out of power? i have never run out of power. on 88db speakers.

6L6 6th April 2012 02:57 AM

Quote:

Originally Posted by dantwomey
After running the F5 for a few hours I realized I was running out of power.

Check your bias. It might not be stable once things get all warm and toasty.

ra7 6th April 2012 03:06 AM

Running out of power means you need to provide a higher input signal. What preamp are you using? You need a whole 2.5V to drive it to full power, if you built it to spec. 95 db speakers should be no problem for the F5.

6L6 6th April 2012 03:16 AM

I thought it was 4v to full output... I could be wrong.

AudioSan 6th April 2012 03:20 AM

thats a lack of gain. when you run out of power, your amp has started clipping.

oneplustwo 6th April 2012 03:22 AM

No pictures?! How are we to know you actually joined this elite club? :)

a.wayne 6th April 2012 03:34 AM

Quote:

Originally Posted by AudioSan (Post 2974524)
the sound will change over the next few days.
but run out of power? i have never run out of power. on 88db speakers.

Standard f5 or v2 .......?

AudioSan 6th April 2012 03:40 AM

thats a standar F5 with 30% higher bias. but stil +/-24V rails.

EDIT: F5v2. CViller boards. (not turbo v2)

juma 6th April 2012 08:26 AM

Quote:

Originally Posted by 6L6 (Post 2974568)
I thought it was 4v to full output... I could be wrong.

There are volts and... volts ;)
4V_peak = 2.8V_RMS


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