restorer-john
Grand Contributor
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Akitika GT-108 Stereo Amplifier Kit Review
- Thread starter amirm
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Follow the link. Click the links. You have a computer, right? It's the left click button on that weird mouse thing...It's not hard...
ZolaIII
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Even if you want to play that way you buy either already soldered PCB's or do it yourself with LJ one's which are mostly actually Yamaha clones and for a fraction of the price.Kit is bit special , the idea is that someone is able to solder it together and roll their own amp for the fun off it.
Industrialized automatic mass production beats artisan work all the time for actual quality for your money.
Maybe someone that knows should open a recommended kits treadit sure must be better ones than this
daniboun
Major Contributor
Check measrements into the shared link by clicking here :
LM3886 Done Right Kit
This DIY LM3886 amplifier kit offers the best performance of any LM3886 chipamp implementation due to the optimized PCB layout. Enjoy the cleanest sound with the LM3886.
neurochrome.com
You can also check the Modulus 286 review by Amir :
Review and Measurements of Neurochrome Modulus-286 Amp
This is a review and detailed measurements of the Neurochrome Modulus-286 Power (speaker) amplifier Kit. It is on kind loan from company designer and member, @tomchr. It is to ship by end of this month and costs $1,299. See: https://www.neurochrome.com/product/modulus-286-kit-2/ As you may...
www.audiosciencereview.com
Daniboun, I applaud you for your ongoing/unrelenting enthusiasm, and unbridled passion you bring to the forums. You remind me of Maty’s more well-behaved big brother.
That is all.
*Apologies for the unsolicited, random O.T. Need to give credit where it’s due
That is all.
*Apologies for the unsolicited, random O.T. Need to give credit where it’s due
Because Randy the Cheapaudioman likes Akitika.
solderdude
Grand Contributor
Me thinks the excessive hum is due to the wiring scheme.
The distortion profile is not even that bad. Mostly even order and gradual sloping.
If grounding was done properly it probably would have measured better.
Ground lifter may even make things worse here.
The output cap is also not in the feedback loop, a 100uF polar cap is in the feedback loop.
The distortion profile is not even that bad. Mostly even order and gradual sloping.
If grounding was done properly it probably would have measured better.
Ground lifter may even make things worse here.
The output cap is also not in the feedback loop, a 100uF polar cap is in the feedback loop.
I've looked at Akitika GT-108 kit from time to time as a DIY project but I'm dissuaded by this objective review. Also, I'm non-technical but I've been skeptical about the need for 4 vs. 8 ohm models; seems to me that a competent amp ought to be able to handle both with not problems.
I rated the GT-108 'Poor' because it seems to me to be markedly poor value for money, especially the constructed version of course. There is no contest against, say, Hypex NC122MP amps.
I rated the GT-108 'Poor' because it seems to me to be markedly poor value for money, especially the constructed version of course. There is no contest against, say, Hypex NC122MP amps.
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Multicore
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I never ever vote in these polls but I made an exception here: IT'S GREAT.
Read the manual and you see it's hard to do better if you want an all-analog electronic builder project. The amp and supply circuits are as simple as possible under the constraint of fair performance and home PCB soldering. The audio performance of the amp seems just right for this job, delivering satisfying results that could be improved with a more complex design. You (and your child?) could research those designs while planning your next project. Or maybe you'll instead decide to build an radio controlled car next.
If you want to buy an audio amp, that's easy. If you want to build a stereo hi-fi amp for fun and learning then this is great. Go change your vote now!
If you want to build a mono tube amp, these look like fun family projects too https://www.stewmac.com/kits-and-projects/electronic-kits/amplifier-kits/
Read the manual and you see it's hard to do better if you want an all-analog electronic builder project. The amp and supply circuits are as simple as possible under the constraint of fair performance and home PCB soldering. The audio performance of the amp seems just right for this job, delivering satisfying results that could be improved with a more complex design. You (and your child?) could research those designs while planning your next project. Or maybe you'll instead decide to build an radio controlled car next.
If you want to buy an audio amp, that's easy. If you want to build a stereo hi-fi amp for fun and learning then this is great. Go change your vote now!
If you want to build a mono tube amp, these look like fun family projects too https://www.stewmac.com/kits-and-projects/electronic-kits/amplifier-kits/
daniboun
Major Contributor
GT102 and GT108 are pretty close
Check GT102 measurements here
AkitikA GT-102 power amplifier Measurements | Stereophile.com
Sidebar 3: Measurements I measured the AkitikA GT-102 using my Audio Precision SYS2722 system (see the January 2008 "As We See It"). Before I test an amplifier, I precondition it with both channels driving a 1kHz tone at one-third power into 8 ohms for an hour. However, I ended the...
It has 10u AFTER feedback? Why didn't they do a symmetric power supply to avoid that?
This is clearly a circuit to achieve some "sound".
This amp appears to have a unipolar PS, hence the need for the large C13 coupling to the speaker to remove the DC offset of about half VCC. To avoid a loud "thump" and speaker overload upon power up, K1 is likely in the O position so that C13 can charge through R35 and R38 to about half VCC. Then K1 is switched to the S position, at which point the internal resistive load (to keep C13 charged) changes to R40. But it seems that the speaker is connected to the OUT terminal, not the L1A point. If so, the 10 Ohm / 1 Watt R35 is kept in series with the speaker, which does not seem a good thing even if negative feedback is connected to L1B. Am I reading the schematic incorrectly?
Wow, that's expensive.
Overly aggressive current limiting?
It's ludicrous compared with a Topping LA90 for the same price.
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I'm not sure. I look at that circuitry and my eyes roll back into my noggin! gg*
I'm leaning to Z and power supply too.
The Capstan
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I remember this design with decoupling series capacitor back in early '70 the 20th century, in fact my first power amp I built had similar design (well, with glorious 2N3055 as finalstage) so a bit too much old school for my taste, and results shows the consequence.
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I have a soft spot for DYNACO and have burnt up a few 410's. i was once thinking about this one in my cult days.
Fun to see the review and also glad it's in the rear-view mirror now... I was only half ripped off because I bought a Pass Amp Kit instead and that ended up having half the gain as a normal amp .... maybe that's why it cost half as much as this one...
But now I know better I spend all my money on supplements ...vegetables in a powder anyone?
Fun to see the review and also glad it's in the rear-view mirror now... I was only half ripped off because I bought a Pass Amp Kit instead and that ended up having half the gain as a normal amp .... maybe that's why it cost half as much as this one...
But now I know better I spend all my money on supplements ...vegetables in a powder anyone?
restorer-john
Grand Contributor
Is that capacitor inductor for feedback?
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