Describe the sound of F3

Ryssen · 17th January 2011, 04:17 AM

I have a F3 amp,and I made a couple of 2way speakers.The bas is Scan speak 21w/8554 and i think therea a little lack of bass,does the F3 lack bass?Or is it the basses.

Nelson Pass · 17th January 2011, 04:33 AM

Every one of these amplifiers has different characteristics,
and I would categorize the F3 as having very fine midrange
and a sweet, slightly soft top end. It is not known for
having much punch and control on the bottom end, and has
a relatively low damping factor of about 8.

If you want more and better bottom end, you are probably
looking at an F5. Myself, I would consider bi-amping
the speakers.

Ryssen · 17th January 2011, 04:50 AM

Yes I have built an F5,I might try that one.

VladimirK · 17th January 2011, 06:31 AM

I have tested several modifications of F3 schematics and achieved more impressive bass by increasing an idle current and decreasing voltage amplification factor (increasing NFB) from 5 to 2.
As for improving highs, one may disconnect the chain for current source modulation, but this makes less bass at the same time.
If for Bi-Amping, I would definitely use F3 with disconnected modulation.

Ryssen · 21st February 2011, 10:24 PM

I´m listenning on the F5 through my 2way diy speakers,and it has more bass/punch than F3.
Now mr Pass could you consrtuct an amplifier that combines F5/F3 in one amplifier that would be nice..

Ryssen · 22nd February 2011, 01:54 AM

P.S how could Aleph J be descrived to sound?

Zen Mod · 22nd February 2011, 10:42 AM

sexy

Melon Head · 22nd February 2011, 10:53 AM

"I'm too sexy for my shirt"

17th January 2011, 04:17 AM	#1
Ryssen diyAudio Member Join Date: Dec 2003 Location: Sweden--> Here	Describe the sound of F3 I have a F3 amp,and I made a couple of 2way speakers.The bas is Scan speak 21w/8554 and i think therea a little lack of bass,does the F3 lack bass?Or is it the basses.

22nd February 2011, 10:42 AM	#7
Zen Mod diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	sexy __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery;I'm dumb

22nd February 2011, 10:53 AM	#8
Melon Head Formerly Thanh1973 Join Date: Nov 2006	"I'm too sexy for my shirt" __________________ "No, this sucker's electrical, but I need a nuclear reaction to generate the 1.21 gigawatts of electricity I need."

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17th January 2011, 04:33 AM	#2
Nelson Pass The one and only Join Date: Mar 2001	Every one of these amplifiers has different characteristics, and I would categorize the F3 as having very fine midrange and a sweet, slightly soft top end. It is not known for having much punch and control on the bottom end, and has a relatively low damping factor of about 8. If you want more and better bottom end, you are probably looking at an F5. Myself, I would consider bi-amping the speakers.

17th January 2011, 04:50 AM	#3
Ryssen diyAudio Member Join Date: Dec 2003 Location: Sweden--> Here	Yes I have built an F5,I might try that one.

17th January 2011, 06:31 AM	#4
VladimirK diyAudio Member Join Date: Feb 2007 Location: Tashkent	I have tested several modifications of F3 schematics and achieved more impressive bass by increasing an idle current and decreasing voltage amplification factor (increasing NFB) from 5 to 2. As for improving highs, one may disconnect the chain for current source modulation, but this makes less bass at the same time. If for Bi-Amping, I would definitely use F3 with disconnected modulation.

21st February 2011, 10:24 PM	#5
Ryssen diyAudio Member Join Date: Dec 2003 Location: Sweden--> Here	I´m listenning on the F5 through my 2way diy speakers,and it has more bass/punch than F3. Now mr Pass could you consrtuct an amplifier that combines F5/F3 in one amplifier that would be nice..

22nd February 2011, 01:54 AM	#6
Ryssen diyAudio Member Join Date: Dec 2003 Location: Sweden--> Here	P.S how could Aleph J be descrived to sound?

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