Dx Blame ST - Builder's thread - post pictures, reviews and comments here please.

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We are learning by our mistakes....so...future shipment of boards

Will be made using insurance and pappers proving we have sent the stuff.

The insurance will be the guarantee..if the destination informs officially to the system that have not received the package..then Brazilian mail system will pay us the declared value from the gods included inside the package lost...this way we will be able to send another kit of parts once again.

This increases cost of shipment..but also increases the guarantee the stuff will reach the destination adress.

In Brasil we cannot send things with the declared value above 50 USD...so..this will be the limit of money we can have back if something was lost....more than 50 US bucks represents we have to enter documentation of exportation..... crazy bureaucracy!

regards,

Carlos
 
Blame ST comparison to Symasym

Hi all

I have finally got around to making a comparison video on u tube which is a direct side by side comparison of the differences in sound between te symasym and the blame st. The symasym uses separate 160w transformers to each channel. The blame st uses a single 300w. This was recorded using a digital camera so the quality isn't as good as I wanted, but you can still hear an audible difference between the two. Four people have listened to this side by side comparison and all four were unanimous in which amp sounded the best. Hope this helps in peoples decision in which amp they wish to make next.

Heres the link
YouTube - Symasym V Blame St Amplifiers

Regards

Simon
 
Thank you Nissman.... i found both very good, despite our cameras

are never very good to show details.

Well....both have connections with me...i feel them my sons.

You know, during a moment, depending the music, i felt the Symasym a little bit better.... well... this depends on the music style.... the one with the blue light in the front panel.

Thank you,... i feel honored to be head by head with Michael Bittner, because he is a real designer, a genius.... a much better prepared man compared with me.... a am very honored... almost even in my evaluation.

Just for you to know.... once bittner said to me:

- "I am using Eagle because already made...i was thinking to produce my own simulator, but i decide to save time!"

The guy was so good that he could produce a program alike Eagle if he wanted!!!

regards,

Carlos
 
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Here is a recording having a flac file into the playback

Digital camera recording, at least mine one (Sony DSC-S2000) is terrible.

But, at least i am having fun...the audio quality at my home is very impressive:

YouTube - Dx Blame playing a flac file

Use 480 in the Youtube, believe me or not, quality is better..better high end..try both, 360 and 480 and observe the difference by yourself.

regards,

Carlos
 
Sadly i cannot support it...but sounds better, for sure it does!

regards,

Carlos

Is the blame es different to the Blame ST? In which way (or are they the same)?. At the moment I am going to use the Blame ST as the yardstick for any future comparisons if I ever build anymore amps. Is anyone interested in purchasing a nice "Space amp"? I could use some money to build a new amp. I think I may have caught some sort of bug.
 
Thank you to have the same bug i have...we are sick in the good way

I love your audio comparison, despite i have perceived some advantages to the Symasym in the recording..hehehehehhe...interesting these things.... maybe the realism... the real advantage, was into high end...crispy detailed treble..and this the camera cannot capture.

But i could see your feet moving while listening the Blame... this is all i wanted to see...was clear the emotion...no doubts you love the Blame!

I have to search for the schematic, to show you one and other....but soon i will publish it here.

Technically speaking..the Dx Blame ES is a tragedy, have some awfull solutions..things that should make it oscilate and parts to slow down the amplifier...to kill the slew rate..... but, as these things are very strange...despite technically awfull..the sound is better..much better...stereo image, sound stage, separation, details in the treble..well...a lot of advantages.

I could not support it, because in the name of decense, i cannot support something that sounds awsome but has technicall flaws.... this does not help folks as the amplifier can be self destroyed, depending the type of tone and level you inject into your power amplifier...for instance... 25 Kilohertz, square wave, and saturating the input...sometimes VAS and NPN driver blows.... also i could find a strange signal over the positive DC portion of the square wave...a kind of oscilation of high frequency superimposed and having a nice shape... alike an UFO... you know..increase slow and them decrease... 1 volt peak to peak crazy thing (power is ridiculously small...anything to bother your system or your speaker)...well..... that amplifier is magic..with all these flaws it should be awfull.... but in the reality, it can eat the Dx Blame ST, in the breakfast, easy, laughing and rolling into the floor.

My obligation is to say:

- "Build it under your own risk..this is a time bomb..one day can explode"

But if not explode..then you will meet the divine..anything in earth plays so nice sound as this amplifier.... no chance for the competition..they will be humiliated in a comparison!

regards,

Carlos
 

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Another thing about the Dx Blame ES... something i would ask you, brazilians, not

to comment in the brazilian forum..because i use to receive a lot of PM daily, with people asking for power... it seems my people is powerholic...so.... things that may reduce power is not something interesting to publish there..they will perceive the power losses and this is not positive.

The modification here suggested, was first installed in the Dx Blame ES, and created as an defect/effect, another distribution of harmonics during the clipping...this made the amplifier sounds "louder"...in the reality more distorted and showing some interesting types of distortions..... theory addicted folks will never understand that..unless they try by themselves and perceive the defect/effect.

It is a defect that causes an effect..an interesting effect during clipping.

These power rail series resistances, are assymetrical in value... so.... during clipping you have assymetrical clipping and also some loss of power...the assymetrical clipping because different resistances, created another harmonic distribution during clipping...so.... that second , third and fourth harmonic resulted different in quality, in numbers and in sonic effect.

These resistances where reduced to 33 or 39 ohms...this killed the defect/effect, but also have removed part of the "magic" in the sound.... only during clipping folks.... that magic "louder" sound have almost disappeared when the rail resistances where reduced.

I am not interested, politicaly speaking, to have brazilians producing such kind of modifications, i would like to have them finishing their ST models and soon starting to build the MKII and the Supercharged...so..... will not be friendly with me, if a brazilian spread this message...for sure the one will be removed from my friend's list immediatelly.... majority of my people appreciates sonic qualities as also they love power...this modification reduces real power... say...the electrical power..but the perceived power increases (perception of power is fooled by distortions, in special assymetrical distortions).

My people have not even finished to build the ST model...so.... the possibility of focus deviation worries me.... deviation from the target, from the main objective that is finish the stuff they have started.

regards,

Carlos
 

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Did fire up my Blame ST yesterday but not before I checked everything here the results;
offset : 0Vdc for both channels
Bias :6Vdc for both channels
Time to listen music but I noticed something strange one loudspeaker woofer is making a larger excursion as the other channel.I tought maybe a default in the speaker but this behavior accurs in other speakers aswell.What could be the reason do I have to match all the trannies?
 
Check your construction, check solder, check parts

If you have differences in performance is because you have differences in construction.

Do not worry too much about matching..it does not produces all that effect...you have a defect..something is wrong... a component, a solder, a value, a polarity..something alike...hardware defect.

regards,

Carlos
 
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