Simple Killer Amp - Listening impressions

[KLe]

Hi,
deliberately harsh to prompt a reply.
Glad you and friend like your first results.
I'm looking forward to report part2.
Real interesting if your report2 says it sounds worse!

Hi AndrewT
It is nice of you to provide encouragement It would be wonderful, if you provide us with the details of the PSU that you would use with the GB300D

Do you intend to build a pair of Greg's GB300D kit amp modules I think that you should, as, it is a very nice amp, indeed
rgds

 

[ShinOBIWAN]

Hi AndrewT
It is nice of you to provide encouragement It would be wonderful, if you provide us with the details of the PSU that you would use with the GB300D

I think Andrew just craves for someone to say its useless so as to change the scenary around these parts 😀

After more thought and consideration I've come to the conclusion that I misjudged the SKA. Its a terrible amp so don't buy it if you've got any sense or self respect 😉

 

[hifryer]

interconnects

Kle,

What interconnects???

Sounds like a major system problem to me if such things make such a difference!!!

Needs proper impedance matching and pre-amp drive capability etc etc.

Really basic stuff rather than "amateur" "tone control" cabling!!

cheers

 

[AndrewT]

Hi,
I think Amp Guru has given a recommendation and it was posted on the forum.
From memory it showed 2 times 15mF for the GB300 giving +-30mF per channel and 2 times 10mF for the GB150, but it is many days since I saw the posting, so I may be wrong.

I will NOT argue with Amp Guru, he is the designer and manufacturer.

However if you want corroboration then plant the suggested value into the equations.I will show the numbers in reverse order:-
300W into 4ohms needs 49Vpk and requires Ipk=11.25Apk.
2mF/A =>24m5F and 3mF/A =>36m75F. note these results are just either side of Amp Guru's suggestion.

I am not at odds with the majority of designers, but just trying to be helpfull when I see inexperience leading a builder down the illadvised path.

 

[AndrewT]

Hi Shin,
please retract your tongue in cheek thought re SKA.
SKA was designed to allow us to hear the music. It was deliberately designed so that we are the lucky few who do not have to listen to the PSU.

I should not say "we" because at the present time I will not be buying SKA but I continue reading this and similar threads in my quest to continue learning. For me that quest never stops.
But equally the Teacher in me provides guidance when needed, I just have to find the balance for when it's not needed nor welcome. Sometimes that imbalance ruffles a few feathers, in part due to English being my native language. But I do not apologise for that, just beg tolerance.

 

[japjag]

I do agree, improving the sound because of interconnects means a mismatch somewhere...or just a poorly terminated interconnect

 

[hifryer]

interconnects

apologies for sounding harsh above! ( one too many wines with dinner!)

problematic things! even solid copper connectors can sound "different" to brass!! :-(

cheers,

 

[KLe]

Re: interconnects

Kle,
What interconnects???
Sounds like a major system problem to me if such things make such a difference!!! Needs proper impedance matching and pre-amp drive capability etc etc. Really basic stuff rather than "amateur" "tone control" cabling!!
cheers

I do agree, improving the sound because of interconnects means a mismatch somewhere...or just a poorly terminated interconnect

Hi hifryer/japjag
Not at all ... what it means for me, is, that the amp is so revealing that it easily reveals the difference between interconnects 😀

Lets take that a little further, and say, that it easily reveals the difference between not just interconnects, but also, speaker cables, CDP's, preamps, and speakers.

Lets take that a little further, acknowledging what AndrewT is saying, that the PS caps are inadequate (and he is right), and say, that the GB300D is achieving these results through the GB300D's excellent PSR capabilities.

My friend has very expensive equipment, such as Threshold etc, and has listened to even more expensive equipment, so, his and my opinions are completely unbiased and neither of us have an affliation with Greg. He has never met Greg and I met Greg when I purchased the GB300D.

My suggestion is, stay negative if you enjoy that state of being, but not me The GB300D is a very nice amp, and, I can see myself enjoying it for sometime to come. Especially when I finally tweak the amp modules and improve the PS by replacing it with a nice +/-60VDC SMP


I guess like everything in life, where we can exercise our free will, its upto you.
rgds

 

[hifryer]

not negative here.

have fun.

 

[japjag]

Any amp that reveals weak links sounds good to me, I was just referring to interconnects in general, but then again thats a different topic so end it there

Cheers for building the amp and giving your listening impressions, it makes it easier to decide to try this amp or not

 

[KLe]

Any amp that reveals weak links sounds good to me, I was just referring to interconnects in general, but then again thats a different topic so end it there

Cheers for building the amp and giving your listening impressions, it makes it easier to decide to try this amp or not

Hi japjag
It would appear that the area, for you, that needs to be considered, is, what is your minimum speaker impedance loading It would appear that it is not below 4ohms. So, all would appear to be cool in the world of impedance vs current delivery

 

[KLe]

Re: Reinstate Greg...

I'd really like to see Greg reinstated.

I've had email conversation with him and he's a likeable character. I'm not quite sure where all the tension came from in previous threads but it certainly didn't warrant a ban, the mods were bang out of order there, it should have been another more prolonged sin-bin at best. I've seen folks on here get away with much less.

Are you saying Greg's banned for good😕

If so, one more vote for a reinstatement; us less capable types need people like him to give us a never ending stream of projects😀

Agreed.

I, too, agree. Add one more vote for reinstating Greg!

Note: my GB150D is just about done. Will post when ready .... or maybe I should move to DIYHiFi ......
Bill

I also agree. I think Greg should be here with us...perhaps the administrators should reconsider about it.

Yeah,
..............bring back Greg!
Jam

Greg, come back...bb, come back....please, come back...lalalalala....
😀 😀 😀

I favor "colorfull" people, put my name on the petition too.
(Jam, you're a source of inspiration, i'll name my GB150 the HardBall.)

Yes please, one more vote for a reinstatement

 

[Russ White]

Re: Re: Reinstate Greg...

Yes please, one more vote for a reinstatement

I also agree, Greg is a good guy, iron sharpens iron. He should be here.

Cheers!
Russ

 

[mikelm]

another vote for greg

Please add my vote to this as well.

mike

 

[carlosfm]

I sign in too.

 

[KLe]

... For those of you who have built the ska, can you share the particular PS, heatsinks and cases used? I have a gb300 on the way and would like a nice setup for it.

Hi BeerCan
Have you received and built your GB300D yet? If, so what are your thoughts ...


Thankyou Guys
Only just saw all the extra votes and thought that I could reiterate mine ... Yes please, my vote again, for Greg's reinstatement

 

[mastertech]

anatech will you vote with me to bring back Greg to help us
with troubleshooting amplifiers😀

i sign too for the return of the guru Greg😀

good luck😎

 

[jkeny]

Consider me one of the Yeas - bring back Greg

 

[KLe]

I've just received the GB150 boards from Mr Ball.
Knowing why Mr Ball made this design, and his background, does not make me question the plots he posted of the SKA.
I'm just interested in how well such a low cost design does compared to the traditional ones.
You'd like distortion numbers ?

Hi jacco vermeulen
Have you built your GB150D yet? If, so what are your thoughts ...

 

[lineup]

anatech will you vote with me to bring back Greg to help us
with troubleshooting amplifiers😀

I sign too for the return of the guru Greg

To me it is obvious Greg will not be back. This can be for better or for worse.
I am not sure he wants to come himself.
Its his own choice to a large, I think.

He does answer questions in person, in another forum.
I have provided link earlier in this thread.


Better if posts here are focusing at Simple Killer Amplifier.
When topics end up dealing with persons instead of diy audio matters,
they 90% sure will be a big bad mess of feelings.

This is my general observation.

Regards
lineup