BenF
Headphoneus Supremus
- Joined
- Jan 22, 2013
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No chance of electrocuting yourself or damaging the amp.Why "easier and safer" ?
No chance of electrocuting yourself or damaging the amp.Why "easier and safer" ?
It is baseless and irresponsible for you to assume those risks are present for the alternatives I suggested.No chance of electrocuting yourself or damaging the amp.
I guess Stax is an irresponsible company, printing warnings like this one on the back of 252S:It is baseless and irresponsible for you to assume those risks are present for the alternatives I suggested.
If someone is not comfortable working with electronic circuits, then it goes without saying that this mod is not for you. Don't undertake this as a "first project".I guess Stax is an irresponsible company, printing warnings like this one on the back of 252S:
They also include this baseless warning on the first page of the manual:
I think it's safe to say that most people are not qualified to work on high voltage circuits - hence the "easier and safer" alternative I suggested.If someone is not comfortable working with electronic circuits, then it goes without saying that this mod is not for you. Don't undertake this as a "first project".
The mods do not compromise the amp's safety or reliability in operation.
Do you have something besides scare-mongering to bring to the conversation? Sheesh.
1. Sir, you are the one conflating the issues. Your "easier and safer" suggestion only relates to choosing which 12V power supply to use. The circuit mods are a separate matter. The supply you're recommending is good enough and will work fine but it is not any safer and is frankly overkill in this application. Inside the 252S, the only thing that uses the 12V supply directly is the power LED and the PWM chip. You don't need a Jung-based super-regulator for that.I think it's safe to say that most people are not qualified to work on high voltage circuits - hence the "easier and safer" alternative I suggested.
Why are you taking this so personally? I haven't said a single word about your mod.
It doesn't matter which parts of 252 get the 12v directly and which indirectly - feeding a higher quality signal will result in less noise.... Inside the 252S, the only thing that uses the 12V supply directly is the power LED and the PWM chip. You don't need a Jung-based super-regulator for that.
I hope you will understand if when choosing between your recommendation on safety and Stax's, I will choose to follow Stax's advice.2. Working on HV circuits does not require any special qualifications. Replacing HV parts is not any different than replacing other ones. It's safe, because one doesn't work on the circuits when they're powered up. And, the fact is, the 252S HV circuit doesn't generate enough power to hurt you. A couple milliAmps at 200V will generate a mild sting, yes; but hurt, no.
Not true. Circuit context does matter. I've tried and tested several of them, and my measurements and listening say that any reasonably-regulated supply is just fine here for the raw -12V. Some of the advantages of using something like a Jung super-regulator (super-low output impedance) are totally lost by connecting it with a couple feet of cable between two barrel plugs.It doesn't matter which parts of 252 get the 12v directly and which indirectly - feeding a higher quality signal will result in less noise.
They put that on there for legal reasons. My advice is common sense. If you're not comfortable modding electronic circuits, don't do it. My toaster oven also says "danger - no user-serviceable parts inside", but it's not going to stop me from fixing it if/when it breaks.I hope you will understand if when choosing between your recommendation on safety and Stax's, I will choose to follow Stax's advice.
That's ok. I've always considered equipment mods to be self-qualifying; people who aren't interested or can't do them ignore them and walk on by. I've also started a thread about the mods in the DIY forum, so perhaps interested modders should go there to discuss, so as not to ruffle any more sensitive feathers here.Vast majority (I'd guess well over 90%) of people in this thread use electrostatic amplifiers, but do not build or mod them (unlike headphones, which many people do mod personally). For these people your mod (as great as it may be), is not an option.
Good idea.Anyway, to avoid derailing this thread, +1 to ignore list.
Not really, other than CanJam but would definitely open to have plastic case as an option.You transport your Stax that often?