Guess, what is it?

Wavebourn · 20th October 2008, 03:04 AM

What is it, who knows?

infinia · 20th October 2008, 03:06 AM

Was it once known as a planet?

Is that small triangular box on the floor the active amps?

jol50 · 20th October 2008, 03:40 AM

Its a paralleled hybrid infusion transponder.

c2cthomas · 20th October 2008, 03:49 AM

http://www.linkwitzlab.com/pluto-wa_2.htm

It's a very nice speaker according to several people that have listened to them.

Take a look at the RMAF thread and you will see some very favorable comments. I have not had a chance to listen to this speaker so I am not able to offer any impressions myself.

Wavebourn · 20th October 2008, 04:39 AM

Yes, there are nice speakers. Quite flat frequency response, very good stereo imaging. But rumbles from a turntable caused audible Doppler effect unfortunately, due to huge excursion of small areas.

lineup · 20th October 2008, 05:34 AM

Quote:

All power amplifier stages utilize
the high-performance National Semiconductor LM3886 integrated circuit.
................
The operational amplifiers are Burr-Brown/Texas Instrument OPA2134.
They are quiet and have very low distortion.

Quote:

The tweeter channel has a gain control stage which is linear in dB.
It is followed by the
two stages of a 4th order Linkwitz-Riley highpass filter and
then an allpass for correcting the phase shift
due to offset in acoustic centers between woofer and tweeter.
The notch filter equalizes a peak in the tweeter response.
The last stage is the power amplifier.

http://www.linkwitzlab.com/Pluto/electronics.htm

A typical active system: chip pre crossovers -> chip powers -> drivers.

Wavebourn · 20th October 2008, 04:45 PM

It was easy one;

now, what is this? Alcohol was needed for this construction...

00940 · 20th October 2008, 04:56 PM

it's a Nelson Pass amp. He posted pics of that one under construction here : DIY heatsinks

No idea which amp it is though

Wavebourn · 20th October 2008, 05:05 PM

Quote:

Originally posted by 00940
it's a Nelson Pass amp. He posted pics of that one under construction here : DIY heatsinks

No idea which amp it is though

I don't know either that lucky winner who belongs it to now. Nelson brought such unfinished amps to donate to fellow DIY community. Also, he brought many of other goodies, like this nice compact transformers:

Wavebourn · 20th October 2008, 06:57 PM

One more mystery item...

20th October 2008, 03:04 AM	#1
Wavebourn diyAudio Member Join Date: Sep 2006 Location: Pleasant Hill, CA	Guess, what is it? What is it, who knows? __________________ The devil is not so terrible as his mathematical model! Wavebourn: We Create Creativity!

20th October 2008, 03:06 AM	#2
infinia diyAudio Member Join Date: May 2005 Location: Californication	Was it once known as a planet? Is that small triangular box on the floor the active amps? __________________ like four million tons of hydrogen exploding on the sun like the whisper of the termites building castles in the dust

20th October 2008, 03:49 AM	#4
c2cthomas 49 - for the 16th time diyAudio Member Join Date: Oct 2006 Location: Near "Music City" (Nashville Tennessee)	http://www.linkwitzlab.com/pluto-wa_2.htm It's a very nice speaker according to several people that have listened to them. Take a look at the RMAF thread and you will see some very favorable comments. I have not had a chance to listen to this speaker so I am not able to offer any impressions myself. __________________ "You can't always get what you want" K. Richards/M. Jagger *** "Next time I will know some things better" Zen Mod

20th October 2008, 04:39 AM	#5
Wavebourn diyAudio Member Join Date: Sep 2006 Location: Pleasant Hill, CA	Yes, there are nice speakers. Quite flat frequency response, very good stereo imaging. But rumbles from a turntable caused audible Doppler effect unfortunately, due to huge excursion of small areas. __________________ The devil is not so terrible as his mathematical model! Wavebourn: We Create Creativity!

20th October 2008, 04:45 PM	#7
Wavebourn diyAudio Member Join Date: Sep 2006 Location: Pleasant Hill, CA	It was easy one; now, what is this? Alcohol was needed for this construction... __________________ The devil is not so terrible as his mathematical model! Wavebourn: We Create Creativity!


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20th October 2008, 03:40 AM	#3
jol50 diyAudio Member Join Date: Nov 2007	Its a paralleled hybrid infusion transponder.

20th October 2008, 04:56 PM	#8
00940 diyAudio Member Join Date: Sep 2003 Location: Paris	it's a Nelson Pass amp. He posted pics of that one under construction here : DIY heatsinks No idea which amp it is though __________________ Ben.

20th October 2008, 06:57 PM	#10
Wavebourn diyAudio Member Join Date: Sep 2006 Location: Pleasant Hill, CA	One more mystery item... __________________ The devil is not so terrible as his mathematical model! Wavebourn: We Create Creativity!

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