F3 suitability

noviygera · 9th April 2013, 04:30 AM

I have an F3 on loan. A few questions arise:

1. can I safely drive only one channel of the amp (for a/b comparison purposes, L channel my old amp, R channel F3)?
2. how suitable is F3 for 12ohm horn 112db tweeter (bi-amp config, active crossover at 2kHz)?
3. how suitable is F3 for mid+tweeter horns combo (series-passive crossover, 12ohm tweeter, 16ohm midrange)? Midrange will play down to 250Hz.
4. in both above scenarios about how much power will I get from F3?

Thank you,
Herman

Zen Mod · 9th April 2013, 06:00 AM

1.yes ; ground unused input (plug shorted RCA )
2.it is
3.it is
4.roughly - 50% less

noviygera · 9th April 2013, 03:46 PM

I thought the F3 increases power into higher impedance.
10w into 4ohm
15w into 8 ohms
?? into 12ohms, 16ohms, 25ohms?

Wrong?

Zen Mod · 9th April 2013, 04:01 PM

according to user manual :

max unclipped output voltage +/-13V , meaning 26Vpp

that's 26/2/1.4142=9.19Vrms

P=Urms^2/Rload
9.19^2/12=7W

so , I was right , roughly

zygibajt · 11th April 2013, 12:26 AM

Quote:

Originally Posted by noviygera

1. can I safely drive only one channel of the amp (for a/b comparison purposes, L channel my old amp, R channel F3)?

That's the silliest way of comparing two amps, really.

9th April 2013, 04:30 AM	#1
noviygera diyAudio Member Join Date: Mar 2009	F3 suitability I have an F3 on loan. A few questions arise: 1. can I safely drive only one channel of the amp (for a/b comparison purposes, L channel my old amp, R channel F3)? 2. how suitable is F3 for 12ohm horn 112db tweeter (bi-amp config, active crossover at 2kHz)? 3. how suitable is F3 for mid+tweeter horns combo (series-passive crossover, 12ohm tweeter, 16ohm midrange)? Midrange will play down to 250Hz. 4. in both above scenarios about how much power will I get from F3? Thank you, Herman

9th April 2013, 06:00 AM	#2
Zen Mod diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	1.yes ; ground unused input (plug shorted RCA ) 2.it is 3.it is 4.roughly - 50% less __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; Mighty ZM's Bloggg;I'm dumb

9th April 2013, 04:01 PM	#4
Zen Mod diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	according to user manual : max unclipped output voltage +/-13V , meaning 26Vpp that's 26/2/1.4142=9.19Vrms P=Urms^2/Rload 9.19^2/12=7W so , I was right , roughly __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; Mighty ZM's Bloggg;I'm dumb

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9th April 2013, 03:46 PM	#3
noviygera diyAudio Member Join Date: Mar 2009	I thought the F3 increases power into higher impedance. 10w into 4ohm 15w into 8 ohms ?? into 12ohms, 16ohms, 25ohms? Wrong?

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