Thanks for the JR photos. The parts look good, not sure how legit the electrolytics caps are but at this price they likely are legit.
Any pictures of the Mjolnir internals?
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The Stax Thread III
Thanks for the JR photos. The parts look good, not sure how legit the electrolytics caps are but at this price they likely are legit.
Any pictures of the Mjolnir internals?
shabta
500+ Head-Fier
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Yes that's the myheadfi price. But if you buy it taobao, directly from JR, it's much less than that. Taobao is an online market place in China. Myheadfi gives you an english speaking customer service experience, exports the amp professionally (with a warranty) and they are reliable if something goes wrong. And they are entitled to a profit. But the amp sells in china for less than the cost of the specified parts. JR Audio has changed designs just like every other carbon builder. My only point is that he is using knock off parts. So it will probably sound ok for awhile but likely fail much earlier than if you bought it from a builder using the better quality parts.
What kind of taobao price did you find?
It seems to require log-in just to see the items.
It seems to require log-in just to see the items.
I remember I paid 15000dkk for the Carbon with the myheadfi markup, the taobao price was 12.300 dkk. (danish kroner). I roughly calculated the total cost of components at that time, it was about 1300$. (9100dkk~). The amp case & interconnect sockets are not included in this price.
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ThanatosVI
Headphoneus Supremus
Hey guys, hope this is the right place to ask these questions.
With Audeze announcing their first estat tomorrow it's time to get ny stax amplification knowledge on track.
So I was wondering, how well does a speakeramp + energizer combo compete with dedicated estat amps?
I.e. Bakoon 13R + Woo Wee vs whatever estat amp plays in the same price Segment.
Also, what is the best energizer for those already having great speaker amps?
With Audeze announcing their first estat tomorrow it's time to get ny stax amplification knowledge on track.
So I was wondering, how well does a speakeramp + energizer combo compete with dedicated estat amps?
I.e. Bakoon 13R + Woo Wee vs whatever estat amp plays in the same price Segment.
Also, what is the best energizer for those already having great speaker amps?
Lundahl energizers are better than srd7's(less grainy treble, better detail overall), you should build one, or find someone who can build one for you.
Energizer + speaker amp setups can't get as detailed as totl direct drive solutions. It's a price efficient solution to drive electrostatics with enough current.
Woo wee has no ballast resistors on its output and can damage your headphones.
Energizer + speaker amp setups can't get as detailed as totl direct drive solutions. It's a price efficient solution to drive electrostatics with enough current.
Woo wee has no ballast resistors on its output and can damage your headphones.
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ThanatosVI
Headphoneus Supremus
Are there some "non diy" Lundahl Energizers available?
Or to put it differently, can you recommend an Energizer I can use with my speakeramp to get me started? (Like what's the best if those readily available?)
woo wee is good enough for ESP950 level phones but not higher.
iFi-audio makes a fancy transformer box, not sure how good it is.
iFi-audio makes a fancy transformer box, not sure how good it is.
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chocolates
100+ Head-Fier
i'm fairly certain that the parts cost less than the cost of the carbon he's selling, especially at scale - but the parts he's using may not be up to spec with the ones built by other more well-known builders
my rough estimate on the parts cost for a fancy-enough-to-me carbon was: amp section $200, power supply section $200, power transformer $100, volume control/ wiring/connectors $200, case/heatsink/hardware $250. Then add the PCB cost. PCB cost seems to be around $1/square-inch for small batch production. so about $1.1k total.
I think the amp section is simple enough that somebody ought to offer a point-to-point all-silver-wire premium option. power supply section can still do standard PCB.
I think the amp section is simple enough that somebody ought to offer a point-to-point all-silver-wire premium option. power supply section can still do standard PCB.
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h1f1add1cted
1000+ Head-Fier
Did you ever tried the iFi Pro iESL energizer with a very good power amplifier? This solution beats a dedicated Stax amp like a Stax SRM-727 II paried with my Stax SR-009S easily.
buzzlulu
Headphoneus Supremus
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Have fun with that
The first photo looks like Kerry's T2 - so perhaps not the one being sold. If so then right away a reason to stay away. If this is the case then posting photos of someone else's work and trying to pass it off as yours is never a good idea.
Let's not even talk about the lethal voltages running around inside which can kill you if the unit is not properly assembled
The first photo looks like Kerry's T2 - so perhaps not the one being sold. If so then right away a reason to stay away. If this is the case then posting photos of someone else's work and trying to pass it off as yours is never a good idea.
Let's not even talk about the lethal voltages running around inside which can kill you if the unit is not properly assembled
Yes, because 727 isn't a good amp. (unless modded) It is quite well documented what kind of aberrations transformers introduce to signals if they are used at any amplification stage after the input stage. However, I said many times in these forums that a good amp + energizer combo is better than all Stax amps I've ever heard.
It is not even his T2 build as far as I know. There is a guy in Vietnam, builds T2 for 5400 euros. Nowadays, from what I gathered, he is the guy people go for T2 builds. Not sure how good he is, I just know few people who got their T2's from that guy. Of course they liked their T2's, who doesn't like something they paid 5000+ euros for.
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Really? iFi Pro iESL is better then 717? They cost the same used.
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