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Old 1st November 2010, 07:47 AM   #41
ampimp is offline ampimp  United Kingdom
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Thumbs down Stop Wasting peoples time

I subscribed to your thread as i was really intrested in building a baksa .started out to be an intresting and moving forwards project Thread. come on sort it out fella's. all those wasted posts and wasted time.i guess you just let it ride so as to get a bigger score on this thread Come on hugh get ya team together. seems like the gremlins that nearly put end to one of the blame amps is comming to infest you.
And as you may say i dont have to read this thread well you are right.
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Old 1st November 2010, 09:48 AM   #42
godfrey is offline godfrey  South Africa
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Those comments might make more sense if they were posted in the BAKSA thread. It's here: Based on Hugh Dean's AKSA 55

b.t.w. When choosing who to flame over there, you might like to bear in mind it's not Hugh's project.

Thanks for the laugh anyway - just what I needed to fix a monday morning!
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Old 1st November 2010, 01:20 PM   #43
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Quote:
Originally Posted by gaetan8888 View Post
Hello

The only usefull thd specs are the thd spectrum, seeing that spectrum give a good ideas of the type of distortions of the amp and that's more important than the percentage of thd. But still only the listening are the final test.

Bye

Gaetan
ANd what would you say to what i wrote earlier, which is as follows:


Quote:
You have mentioned in the past that you design your amps in such a way that the distortion has a specific profile and this is more significant than the total value of distortion. Speakers contain crossovers which alter the relationship between the harmonics with respect to time. How does this affect the profile?
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Old 1st November 2010, 04:21 PM   #44
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I agree with your assessment, Bigun. Guys who weren't around or particularly interested in Hi-fi in the 1970s to 1990s would not be aware of the big deal distortion was in the Japanese electronics marketing strategies. When you selected your amp power/size/model as high as you could afford, the only technical leveller for other brands was THD and later, IMD, Slew Rate, noise etc. Sound quality outside that was unknown, unsought, and with typical speakers of the day, unassessable so it's funny but now we just go for power and ask whether it sounds "nice".
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Old 1st November 2010, 04:39 PM   #45
AndrewT is offline AndrewT  Scotland
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and around the same time the Japanese came to us British designers to help them penetrate the British market by tagging a B version to the name. These were modified, and sometimes in quite minor ways to sound better.
Yes, they got better reviews in our HiFi press.
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Old 2nd November 2010, 05:34 AM   #46
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Yes, Andrew. I recall ads in UK mags for Pioneer "B" models which were a few pounds dearer and had no tone controls. My English friend told me that they were selling like hotcakes...A simple and effective way to neutralise the UK manufacturers' own spiel!
Dunno how observers and industry types felt about that..peeved maybe?

Prof:
The short answer to your question in post 43 and previous is no. Speaker filters change the relationship of added harmonic components in the same way they do the harmonics already contained in the original signal, since they are now an integral part of it. The input is now divided into driver frequency groups and inherent tiny delays have occurred, yes but when the driver outputs are recombined, the signal and phase relationships are restored as the sound passes through air to your ears. That is precisely what loudspeakers are designed to do.

Note that alternatives like special wide-range drivers and active electronic crossovers seek to improve on or eliminate this function but the same physics issues are still in play. Quality will affect outcomes, as in all real things.
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Old 2nd November 2010, 05:55 AM   #47
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Quote:
Originally Posted by ampimp View Post
I subscribed to your thread as i was really intrested in building a baksa .started out to be an intresting and moving forwards project Thread. come on sort it out fella's. all those wasted posts and wasted time.i guess you just let it ride so as to get a bigger score on this thread Come on hugh get ya team together. seems like the gremlins that nearly put end to one of the blame amps is comming to infest you.
And as you may say i dont have to read this thread well you are right.
Quote:
Originally Posted by godfrey View Post

Those comments might make more sense if they were posted in the BAKSA thread. It's here: Based on Hugh Dean's AKSA 55

b.t.w. When choosing who to flame over there, you might like to bear in mind it's not Hugh's project.

Thanks for the laugh anyway - just what I needed to fix a monday morning!
I think it was a typo, NAKSA not baksa.
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Old 2nd November 2010, 08:16 AM   #48
AKSA is offline AKSA  Australia
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Hmmm, hope you guys are having a great time!

I've got a bloody headache from working on my old Cressida motor, it seems I missed a storm in a tea cup.......

Hugh
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Old 2nd November 2010, 09:10 AM   #49
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Hello Hugh

It's the usual fun of our peacefull forum.

Those flames in the motor cylinder, is it to burn any residus inside the cylinder ?

Bye

Gaetan
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Old 2nd November 2010, 10:57 AM   #50
AKSA is offline AKSA  Australia
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Nah, Gaetan,

I used shellite to perform a leak down test (you cover the piston crown, watch it closely over 5 minutes to see if the level drops) and to get rid of it all we decided to set fire to it. Spectacular, isn't it? But it doesn't get rid of the deposits, unfortunately.

I'm going to hone the bores, put in new rings and bearings, so the entire engine will be cleaned and repainted anyway.

Love this engine, it's a beautiful piece of design, it really is....

Cheers,

Hugh
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Last edited by AKSA; 2nd November 2010 at 11:00 AM.
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