1 watt desk speaker

nightanole · 2nd February 2010, 01:37 PM

So im looking to build a cheap 1-2watt very small mono desk amp.

Something like a 50EH5 or 6T9 (still accepting recommendations)

What im really after is a speaker for the project. The cabinet needs to be the foot print of a clock radio (smaller then 10" by 6" preferred) and it only needs to play radio freq range (100-120hz to 15khz or so) and is only going to be 3ft away from the listener.

Any recommendations? I was thinking of a tangband or fostex. These seem to fit the bill but all the cab designs are huge and are designed to play down to 60hz.

tomchr · 2nd February 2010, 06:54 PM

How about some of the OB speakers gainphile has built? You could also go cheap with a Tangband full-range or expensive with the Jordan JX92S. You might want to ask your speaker questions in the appropriate speaker forums on this site. You'll have a higher chance of getting useful answers.

For the amp, you should be able to get 4-5 W out of a 6LU8 (or probably 6T9) spud in UL mode. I'll be posting the final design soon. You can get a primer here: 6LU8 Spud RFC. You could also look at the Tubelab SimpleSE.

~Tom

nightanole · 2nd February 2010, 07:28 PM

The simple se is in the works. However it will be over $300 and be 20lbs. Im looking for something very small to put on a desk at work that will replace my beloved clock radio (old tube radio that got dropped and shattered into a million pieces).

Geek · 2nd February 2010, 09:28 PM

You want baby Amp

Baby SET

Pics:
Classic Valve Design - Chinook S.E.T. Amplifier

There's a 6AH4GT version earlier in the thread too.

Cheers!

Nikon1975 · 3rd February 2010, 02:27 AM

For the speakers I built the micro-fonken by planet10 full range. I was really surprised !

Best Regards,

Davide

planet10 · 3rd February 2010, 03:57 AM

Quote:

Originally Posted by Nikon1975

For the speakers I built the micro-fonken by planet10 full range. I was really surprised !

nightanole · 3rd February 2010, 12:52 PM

Well since the big guy replied. If i was to make a uFonken, do i just buy a fostex of the right size from madisound and call it good, or is there a small baffle step cross over i dont know about?

human.bin · 3rd February 2010, 01:01 PM

can't you save the driver from the radio? being old there is a chance it's a nice alnico

Nikon1975 · 3rd February 2010, 01:58 PM

Planet10, I never had time to thank you, but that speakers are really amazing.

D.

Nikon1975 · 3rd February 2010, 01:59 PM

I did them with the standard Fostex and plywood I paid 3 $. I think it was the only project I made without spending a fortune.

D.

2nd February 2010, 01:37 PM	#1
nightanole diyAudio Member Join Date: Feb 2009	1 watt desk speaker So im looking to build a cheap 1-2watt very small mono desk amp. Something like a 50EH5 or 6T9 (still accepting recommendations) What im really after is a speaker for the project. The cabinet needs to be the foot print of a clock radio (smaller then 10" by 6" preferred) and it only needs to play radio freq range (100-120hz to 15khz or so) and is only going to be 3ft away from the listener. Any recommendations? I was thinking of a tangband or fostex. These seem to fit the bill but all the cab designs are huge and are designed to play down to 60hz.

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2nd February 2010, 06:54 PM	#2
tomchr diyAudio Member Join Date: Feb 2009 Location: Greater Seattle Area	How about some of the OB speakers gainphile has built? You could also go cheap with a Tangband full-range or expensive with the Jordan JX92S. You might want to ask your speaker questions in the appropriate speaker forums on this site. You'll have a higher chance of getting useful answers. For the amp, you should be able to get 4-5 W out of a 6LU8 (or probably 6T9) spud in UL mode. I'll be posting the final design soon. You can get a primer here: 6LU8 Spud RFC. You could also look at the Tubelab SimpleSE. ~Tom

2nd February 2010, 07:28 PM	#3
nightanole diyAudio Member Join Date: Feb 2009	The simple se is in the works. However it will be over $300 and be 20lbs. Im looking for something very small to put on a desk at work that will replace my beloved clock radio (old tube radio that got dropped and shattered into a million pieces).

2nd February 2010, 09:28 PM	#4
Geek diyAudio Member Join Date: Sep 2004	You want baby Amp Baby SET Pics: Classic Valve Design - Chinook S.E.T. Amplifier There's a 6AH4GT version earlier in the thread too. Cheers!

3rd February 2010, 02:27 AM	#5
Nikon1975 diyAudio Member Join Date: Nov 2009 Location: Tokyo	For the speakers I built the micro-fonken by planet10 full range. I was really surprised ! Best Regards, Davide

3rd February 2010, 12:52 PM	#7
nightanole diyAudio Member Join Date: Feb 2009	Well since the big guy replied. If i was to make a uFonken, do i just buy a fostex of the right size from madisound and call it good, or is there a small baffle step cross over i dont know about?

3rd February 2010, 01:01 PM	#8
human.bin diyAudio Member Join Date: May 2008	can't you save the driver from the radio? being old there is a chance it's a nice alnico

3rd February 2010, 01:58 PM	#9
Nikon1975 diyAudio Member Join Date: Nov 2009 Location: Tokyo	Planet10, I never had time to thank you, but that speakers are really amazing. D.

3rd February 2010, 01:59 PM	#10
Nikon1975 diyAudio Member Join Date: Nov 2009 Location: Tokyo	I did them with the standard Fostex and plywood I paid 3 $. I think it was the only project I made without spending a fortune. D.

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