F5 Listening Impressions & Discussion

[jacco vermeulen]

Why Sir, there's nothing wrong with some unhealthy competition.

 

[umut1001]

Would you recommend me some of the best price/performance woofer for F5 amplifier?(I think price range about 150$/pair)I bought Vifa XT25SC90-04 1" Dual Radiator Tweeters and now i need woofers.Thank you

 

[umut1001]

My carpenter friend will build me a bookshelf speaker.Any suggestions?Thank you

 

[EUVL]

http://www.diyaudio.com/forums/full-range/144211-alpair-6-bass-reflex-bookshelf-2.html#post1904699

You can also scale it up for a Alpair 7.


Patrick

 

[westend]

Would you recommend me some of the best price/performance woofer for F5 amplifier?(I think price range about 150$/pair)I bought Vifa XT25SC90-04 1" Dual Radiator Tweeters and now i need woofers.Thank you

These Scanspeak woofers match the efficiency of your tweeters and are 4 ohm so should be easy to design a crossover network. A steep slope will have to be used if choosing a 1000 hz crossover point. There are other offerings in a smaller woofer (7"-6"), depending on your choices for cabinet size.

 

[umut1001]

I need an easy to design crossover and box too.Thank you very much for suggestions.Other suggestions are also welcome

 

[EUVL]

No crossover required for the Alpair.
You can also make a easy box :

http://www.diyaudio.com/forums/twin...ts-mark-audio-alpair-7-full-range-driver.html


Patrick

 

[umut1001]

Alpairs seems good but i think they are less effeciency.I can not get enough bass with them.Though F5 amp is sensitive to room.I do not have a big room.

 

[Renron]

Alpairs seems good but i think they are less effeciency.I can not get enough bass with them.Though F5 amp is sensitive to room.I do not have a big room.

A little off thread perhaps???
Start a new thread in Loudspeakers either fullrange or multi.
Not trying to be an A&&, but you would be better served in a different forum.

Ron

 

[vdi_nenna]

A little off thread perhaps???
Start a new thread in Loudspeakers either fullrange or multi.
Not trying to be an A&&, but you would be better served in a different forum.

I agree. I want to read about what others think about the F5's sound and their experience with said amp in this regard.

 

[alazira]

Off topic

That would be an interesting test of this forum.

 

[Renron]

So far so good!

We seem to have side stepped that alligator.

Ron

 

[umut1001]

Hi.I saw circlotron amplifier(2sj74 input and IRFP240 output.Only 2 jfets and 2 mosfets)
F5's technical specifications are better but what about sound?
Is there anyone who listened both of them?Which of them sounds sweeter?Thank you

 

[bobodioulasso]

I think circlotron needs a more sophisticated PSU, since it has a worse PSRR.

 

[umut1001]

Hi.I have 8x 25v 47000uf Bc capacitors which have great specifications.each have 4mohm esr and ultra low esl.I think using 4x Bc capacitors per channel would be great.
Is not there anyone built and listen to both F5 and Amazing circlotron?

 

[juma]

I think circlotron needs a more sophisticated PSU, since it has a worse PSRR.

Not if properly balanced. My circlotron with lateral MOSFETs had 200mV ripple per rail and none of the hum or noise (silent as F5).

 

[umut1001]

Great! I also have 2sk135 mosfets and was thinking where to use them in a good amplifier.I think your amplifier sounds very soft

 

[Nelson Pass]

Not if properly balanced. My circlotron with lateral MOSFETs had 200mV ripple per rail and none of the hum or noise (silent as F5).

That's a very nice piece. I like the 4131 with the local feedback.

 

[umut1001]

That's a very nice piece. I like the 4131 with the local feedback.

Hi Nelson.Did you use amazing circlotron with ths4131?What do you think when comparing it with F5 amplifier?(about sound)Thank you

 

[juma]

That's a very nice piece. I like the 4131 with the local feedback.

Thanks Mr. Pass, and not just for your kind comment, but for the design of this lovely sounding chip too