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Old 14th July 2018, 11:53 PM   #11
Michael Rothacher is offline Michael Rothacher  United States
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Quote:
Originally Posted by Dennis Hui View Post
Beast with One Thousand 2SJ109
I have a couple thousand J113's
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Old 15th July 2018, 12:06 AM   #12
Zen Mod is offline Zen Mod  Serbia
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have at least 450 of each J271 and J309

though , 1W is sissy

gonna make that with optocouplers
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Old 15th July 2018, 07:27 AM   #13
Soundhappy is offline Soundhappy  France
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1 watt for mighty drivers rated 3~5 watt's max
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Old 15th July 2018, 07:27 AM   #14
MEPER is offline MEPER  Denmark
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Ok....but with 2V in it gives 2V out.....it is only 0.5W in 8 ohm?
So the preamp needs to put close to 3V out to have 1W in 8 ohm.
Therefor I concluded it had a little bit of voltage gain :-)


I throw away a lot of germanium power transistors some years ago. They were paired in some small white boxes. Now I think I should have given them to somebody instead. If was before I thought I would get time for "DIY" audio.....
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Old 15th July 2018, 07:32 AM   #15
MEPER is offline MEPER  Denmark
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Quote:
Originally Posted by Soundhappy View Post
1 watt for mighty drivers rated 3~5 watt's max
For a 115 dB system 1W is more than enough…….if impedance curve is nice.
I wonder how such a small amp sounds. Is it a 2nd harmonic "beast"?
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Old 15th July 2018, 07:57 AM   #16
Soundhappy is offline Soundhappy  France
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Originally Posted by MEPER View Post
For a 115 dB system 1W is....
Permandur field coils second hand cost ~ 14K, new pair 27K€

Available in France Large bande Voxativ AC-Xp

A dream for watt amplifier
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Old 15th July 2018, 08:03 AM   #17
MEPER is offline MEPER  Denmark
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How many do you have of those?


There is also the GIP Lab stuff:
speaker units english


They use drives with field coils…….the big mid horn driver is +40 kg.....and also relative expensive. Think you can build 1W amp systems with those also…..
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Old 15th July 2018, 08:47 AM   #18
Soundhappy is offline Soundhappy  France
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Flea 1250 Miliwatt's don't mean always tiny monoblock's
VinylSavor: 46
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Old 15th July 2018, 09:17 AM   #19
Soundhappy is offline Soundhappy  France
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Quote:
Originally Posted by Nelson Pass View Post
It's a slow day. Time for a little entertainment - a micro project!

Someone sent me a request for a simple 1 watt amplifier.
Please Mr Pass Lovoltech LU1014D jfet version
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Old 15th July 2018, 10:54 AM   #20
wdecho is offline wdecho  United States
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One of, if not, the best sounding amplifier I have built is a 1 watt tube amplifier. Using 103db horns.
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