I'm a pure diy guy, i have made a lot of amp in the past, mostly cmoy and its variants, and the most succesful is O2, i like it a lot. Then i decided to go up to some "end game" amp and it was the Dynalo Mk2, done it but it doesn't sound good at all, i mean not better then the O2, so next i build the Krell KSA-5 clone, same with the previous one, i'm not satisfied. So the final attempt, i build the AMB M3 with almost important part (board, mosfet, transistor) ordered from AMB or mouser to make sure that i don't have any fake or defective parts when buying from local shop and it still doesn't sound good at all. I think there must be something strange happen here, maybe the power cord, transformer or something not the circuit itself.
The Dynalo MK2 i have all the transistor order from mouser, transformer is R-core type from china, power supply board is Krell Ksa-5 PS board or Gold Reference PS, electrolytic cap is Panasonic FC, film cap is wima mkp4 or kemet mmk5.
The AMB M3 have almost parts order from AMB and mouser, resistor and cap is from local shop like the Dynalo MK2. PS is AMB Sigma11 also order from AMB.
AMB M3
Dynalo Mk2 with KSA-5 PS
KSA-5 board
Original Dynalo in Dynalo MK2 board with Golden Reference Regulator
Nice chassis for these amp collecting dust.
Also my reference is O2, schiit Vali, JDS C5d, Cayin C5, JDS C421, i don't think my big diy amps sound any better than any of those. I mean it just sound normal, not kind of oscillating but just not good.
I also ask KG (the creator of Dynalo) here: https://www.head-case.org/forums/topic/11027-the-multi-amp-aka-dynalo-mk2/?page=28
I'm very appreciate if anyone can give me some suggestion.
The Dynalo MK2 i have all the transistor order from mouser, transformer is R-core type from china, power supply board is Krell Ksa-5 PS board or Gold Reference PS, electrolytic cap is Panasonic FC, film cap is wima mkp4 or kemet mmk5.
The AMB M3 have almost parts order from AMB and mouser, resistor and cap is from local shop like the Dynalo MK2. PS is AMB Sigma11 also order from AMB.
AMB M3
Dynalo Mk2 with KSA-5 PS
KSA-5 board
Original Dynalo in Dynalo MK2 board with Golden Reference Regulator
Nice chassis for these amp collecting dust.
Also my reference is O2, schiit Vali, JDS C5d, Cayin C5, JDS C421, i don't think my big diy amps sound any better than any of those. I mean it just sound normal, not kind of oscillating but just not good.
I also ask KG (the creator of Dynalo) here: https://www.head-case.org/forums/topic/11027-the-multi-amp-aka-dynalo-mk2/?page=28
I'm very appreciate if anyone can give me some suggestion.
You need to give us more details. What do you think is not sounding right? Can you borrow a really good amp from someone to try out in your listening environment? Are the amps the problem here? Perhaps you need better speakers, or a better audio source. Or maybe there is a cell tower nearby dumping RF energy into your amps. Do they sound any different after you've put them into their enclosures properly?
You say you like your O2. The new amps sound just as good, but not better. To me that suggests that the limitation is somewhere else. Everything in the sound chain needs to be good. If your speakers are terrible, even the best amp out there won't give you great sound.
You say you like your O2. The new amps sound just as good, but not better. To me that suggests that the limitation is somewhere else. Everything in the sound chain needs to be good. If your speakers are terrible, even the best amp out there won't give you great sound.
In fact my schiit vali even sound better than my diy amp, i have also borrow my friends original Dynalo and it sound much much better than my dynalo mk2 although it using much cheaper and more simple PS, you can see my post here: https://www.head-case.org/forums/topic/11027-the-multi-amp-aka-dynalo-mk2/?page=28#comment-739058
It's funny how you duplicate my experience. I build M3, hooked it to source and my HD650 (or 600). It was a major disappointment. Frustration last for several days till I change the IC. Sound become magical. So if you got decent power supply and source decent parts locally M3 amp not a low point of yours system. It’s something else.
I’ve no experience with schiit vali but some tube color the sound. Result of this coloration is absents of harshness what present in the recording. Or injected later. You need to check better source or hook source directly bypassing the connectors.
Vlad
I’ve no experience with schiit vali but some tube color the sound. Result of this coloration is absents of harshness what present in the recording. Or injected later. You need to check better source or hook source directly bypassing the connectors.
Vlad
Sorry for misunderstanding. If you want I'll open the case and check the chips. I think it was standard AD8610. Problem was simple interconnects - the wires. I grab the first set I get my hands on. Probably they was bundled with DVD player or something like this. Get a little better IC (interconnects) and change inside wiring. A lot of information on the net. Please don't get overboard. If you source is good it can make major difference. Of cause recording (music) should be good. M3 is a good amp and capable to show deficiency in you system. What is the phones you use?
Usually the system doesn't sound good - not a single component.
Vlad
Usually the system doesn't sound good - not a single component.
Vlad
I would be inclined to do some tests using a signal generator and a scope and see if the problem is in the amp or somewhere else.
Methinks the OP has a nonproblem. He's got a bunch of perfectly fine amplifiers, but what he wants is a magical effects box. Or decidedly non-zero output impedance, at the very least. Fortunately an adapter to add output resistance is easy enough to make.
People who go on at length about the electronics in their amps but don't even bother to mention the model of headphones used (as mentioned, the most important element of the signal chain more often than not) tend to have no clue of load and output impedance interaction. If you belong to this group, read up on it and possibly do some calculations, the effect is super-duper-important in practice.
People who go on at length about the electronics in their amps but don't even bother to mention the model of headphones used (as mentioned, the most important element of the signal chain more often than not) tend to have no clue of load and output impedance interaction. If you belong to this group, read up on it and possibly do some calculations, the effect is super-duper-important in practice.
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