F3 and 90db speakers and passive preamp?? - diyAudio
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Old 24th April 2016, 09:56 PM   #1
EPI GUY is offline EPI GUY  United States
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Default F3 and 90db speakers and passive preamp??

Hello folks,
I have a chance to dip my toes in the first watt (clone) waters. An F3 clone to be exact. My concerns are this; will this amp drive my 90db Nola Boxer 2's,and would this work with my Promitheous Audio passive preamp? I am currently running a pair of Monarchy Audio SM70mkII amps. My listening room is approximately 9x13 with 8ft ceiling. A loud listening session for my is about 85-90db. I am seated about 6ft away from my Nola's. Any insight you folks can share would be greatly appreciated.
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Old 25th April 2016, 12:09 AM   #2
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Old 25th April 2016, 12:11 AM   #3
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Thanks for the response Zen Mod. So,you see no issues with this combo?
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Old 25th April 2016, 01:04 AM   #4
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I think you should build 2 firstwatt amps why settle for just one.
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Old 25th April 2016, 01:19 AM   #5
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Quote:
Originally Posted by 2 picoDumbs View Post
I think you should build 2 firstwatt amps why settle for just one.
LOL! I would be picking this up used. I have ZERO skills. I would probably solder my ear to a pcb!
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Old 25th April 2016, 01:41 AM   #6
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Originally Posted by EPI GUY View Post
LOL! I would be picking this up used. I have ZERO skills. I would probably solder my ear to a pcb!
In that case I assume you probably live in the USA, call Mark from Reno Hifi and ask to demo 2 different Firstwatt amps. He sells second hand gear also so no problem there.
Mark is one of the best retailers I have ever dealt with.
Reno Hi-Fi
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Old 26th April 2016, 11:35 AM   #7
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Someone has to have some input on the compatibility of this equipment.
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Old 26th April 2016, 01:05 PM   #8
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Was that 85dB to 90dB average or peak loudness?
Assuming average loudness level then your average power requirement is less than 1Watt so it would certainly be ok power-wise.
However the damping factor is not great so the F3 tends to be a little more suited to full range drivers or driving the mids/tweeter in a biamp setup. Without seeing an impedance curve of your speakers it's hard to say how suited they would be. Power shouldn't be an issue though.

The safest bet would be F5, M2, F6, J2, AlephJ, before the F3.
F3 should be ok but the other amps are a better match.
However I quite enjoy listening to my ACA amp on 90 dB speakers sitting at the computer, but I'm only sitting 4 feet away. Best advice is to get an audition.
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Last edited by 2 picoDumbs; 26th April 2016 at 01:16 PM.
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Old 26th April 2016, 03:51 PM   #9
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Thank you very much for the input. That's what I am looking for. 85-90db is my peak level. Auditioning these amps would be tough. Right now I am looking for a used clone to test. If it works,I would save my coin,and purchase the real deal.
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Old 27th April 2016, 11:43 AM   #10
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After looking at specs,it appears the J2 would work best with my rig. Now the hunt for a used DIY J2!
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