Yeah maybe.I am using 8inch Nokia woofer in a closed box.I did not put any stuff into the speaker box.Maybe sound will be better when i put fiber.It plays too loud with F5
Resistors do affect the sound. If you're using metal film, try replacing
some with carbon resistors. It will mellow the sound.
some with carbon resistors. It will mellow the sound.
try tar impregnated hemp fiber(brown)
pull the fibers apart to make it more airy
I have found it to sound better than anything else
umut, did you consider the Thiele-Small parameters when you put that speaker in that box? If it is just a random speaker/box combination it won't tell you anything useful about the amp. In any case I can't believe it sounds very good with no stuffing, and differences in the sound of speaker systems are usually orders of magnitude more than differences of sound in resistors. Pretty hard to evaluate the sound of the F5 or any good amp without really good speakers.
Yes you are absolutely right.I tried different variations with my woofers.First i made a speaker with 20cm nokia woofer but it is nearly impossible to find its ts parameters.It is production of Nokia electronics GMBH Germany and no datasheet,no web site,no contact for it.Maybe a German friend can help me about nokia woofers.I am only making training with it.Sound is sometimes too much, bass is too boomy and make headache.Maybe it is not designed for sealed boxes.
Secondly i copied B&W 2003 speakers(I found its dimensions).It is ported box 16cm woofers and it sounds very good.
F5 is very quality amplifier.Its high frequency response is excellent.And it must be matched with good speakers to get the best results
Secondly i copied B&W 2003 speakers(I found its dimensions).It is ported box 16cm woofers and it sounds very good.
F5 is very quality amplifier.Its high frequency response is excellent.And it must be matched with good speakers to get the best results
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You can find TS parameters by building a standard sealed box and doing a bunch of tests, but it is a pain in the neck and I have never tried it. I sympathize with your Nokia problems. For many years had a really nice 15" alnico woofer that had no data. I think I finall ditched it when I move across the USA five years ago. But I'm getting off-topic, eh?
Add something about your F5 listening in your passages so you won't get off topic then 😀
Oh i read that alnico woofers are very nice.I think it may sound very well with F5 amplifier.Did you try it with F5 amp?
I want to get one to play with F5 amplifier but afraid of customs
Oh i read that alnico woofers are very nice.I think it may sound very well with F5 amplifier.Did you try it with F5 amp?
I want to get one to play with F5 amplifier but afraid of customs
Hi.I listened to F5 amp with metal sphere Grundig speakers.Configuration was 25x4 Kendeil 25v 47000uf as power supply ,opa627+lme49600 as preamp.The sound was awesome!I did not hear a sound like this before.It has IRFP transistors at the output.The soundstage was very good.Details of high frequencies are impressive.With some beautiful harmonics.But it is not bad to my ear.It is sweet.It sounded me better than ever
And i asked to my friend that F5 philosophy is a building an amp with a few components but there is an opamp and integrated buffer(lme49600).So signal passes in many components(Is not it a dilemma?).But the sound is very very good.
I want to try F5 with a discrete preamp(HDAM preamp cascoded HDAM buffer and with only HDAM preamp)
Has anyone tried this configuration?Thank you
And i asked to my friend that F5 philosophy is a building an amp with a few components but there is an opamp and integrated buffer(lme49600).So signal passes in many components(Is not it a dilemma?).But the sound is very very good.
I want to try F5 with a discrete preamp(HDAM preamp cascoded HDAM buffer and with only HDAM preamp)
Has anyone tried this configuration?Thank you
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Was this your first F5 variation?
Congratuations by the way.
I never thought I would like this amp as much as I do.
The beauty of it is you can quite easily tweak it to sound the way you want it to, or maybe it is easy because I have experimented quite a bit with this design (more so than other designs).
Congratuations by the way.
I never thought I would like this amp as much as I do.
The beauty of it is you can quite easily tweak it to sound the way you want it to, or maybe it is easy because I have experimented quite a bit with this design (more so than other designs).
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Hi.No it is not my first variation.I tried many things with F5 amp.My first F5 was with fairchilds and second one is Toshiba output ones.I tried with littl capacitors and then I tried with big Kendeil and Rifa capacitors and saw that both of them sounds good.Kendeils sounded a bit smoother and softer to me.And finally my friend liked IRFPs very much and i visited him to listen.It sounded very nice to me.It has a reverb sound 🙂 Soundstage is wide
Yes I like irfp devices too.
Have you tried two pairs of mosfets at the output (as opposed to one pair)?
I haven't tried fairchild.
My next variation will be with 2sk2013/2sj313
I would also like to try 2sj200/2sk1529 if I can get hold of them.
If you already have the transformers handy and the necessary heatsing, have a go at cascoded input and 40V rails (or anything above 32V).
Have you tried two pairs of mosfets at the output (as opposed to one pair)?
I haven't tried fairchild.
My next variation will be with 2sk2013/2sj313
I would also like to try 2sj200/2sk1529 if I can get hold of them.
If you already have the transformers handy and the necessary heatsing, have a go at cascoded input and 40V rails (or anything above 32V).
Hi.No i did not try 2pairs.My transformer is powerful(600va toroidal) but it is 4x18volts.I will try 2sk2013/2sj313 too.Thank you!
Now i am thinking to build a preamp to use with F5.With toshiba 2sk170/2sj74 jfets and irf510/9510 mosfets.What do you think about it?
It definitely wasn't intended to be a definitive solution. Just a quick mock up, of what might be possible.
What else would you add to remedy that?
Obviously you might need to add gate resistors, but is there anything else you would add?
What else would you add to remedy that?
Obviously you might need to add gate resistors, but is there anything else you would add?
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