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Stax Sr-30

post #1 of 11
Thread Starter 
I was just over my friends house messing around in his room and I found some Stax SR-30 headphones with a sr4 amp. He said he would sell them to me for like 50 bucks. They sounded very good with his source but he has over 5000 dollars worth of keyboards so even a pair of 2 dollar non named headphones sound good on it.

So are these worth it ? How much are they worth? Also had some questions about the amp's connector in the back. It uses 3 wires that my friend hooked up to his speaker's but is there some type of piece I can get to allow that to hook up to a 6.3 or mini jack. Thanks


Kyle
post #2 of 11
Try a search on the Gear FS/Trade forum (for Stax SR-34)... several pair of those have changed hands. IMO they're worth 50 bucks. I'm supposed to have a pair coming in from someone here (living in Greece), it's been almost 3 weeks now tho and no joy yet

He said they sound about on the level of Grado SR80s. Might give you a small taste of the electrostatic 'sound', if you're interested in future purchase of something like Omega II's. It's doubtful they'll beat too many modern cans (they are circa. 1982 or thereabouts). The SR-4 adapter is supposed to be the weak point... something about crappy wiring and parts.

P.S. you definitely need a speaker amp for those. And if nobody said it yet: Welcome to head-fi, and sorry about your wallet!
post #3 of 11
Thread Starter 
Quote:
Originally posted by fewtch
Try a search on the Gear FS/Trade forum (for Stax SR-34)... several pair of those have changed hands. IMO they're worth 50 bucks. I'm supposed to have a pair coming in from someone here (living in Greece), it's been almost 3 weeks now tho and no joy yet

He said they sound about on the level of Grado SR80s. Might give you a small taste of the electrostatic 'sound', if you're interested in future purchase of something like Omega II's. It's doubtful they'll beat too many modern cans (they are circa. 1982 or thereabouts). The SR-4 adapter is supposed to be the weak point... something about crappy wiring and parts.

P.S. you definitely need a speaker amp for those. And if nobody said it yet: Welcome to head-fi, and sorry about your wallet!
Thanks, well I own a pair of rs-1's I just thought it would be cool to mess around with them .

Thanks for the help

Kyle
post #4 of 11
These phones are electrets as sort of poor man's electrostatic, but still very good quality compared to most dynamics.

The "SR-4" is not an amp but a transformer. This is important to realize because it must be hooked up to a power amp of the sort used to run speakers, so this type of system is more suitable for home than portable use.

The phones themselves can be run off various Stax amps. These are probably the "low bias" phones. Stax went high bias about 15 years ago to get better dynamics from their phones, but many of the new amps still have a low bias output for the older models. Some of the older phones actually sound pretty nice. They should have one or two less pins than a electrostatic phone since they are permanently biased (hence they are called electret) and don't need the bias connection.
post #5 of 11
I've got mint SR-40's/transformer and a new extension. These cans sound unbelievable. I'm not sure about the condition or sound of the set you're considering, but my electrets sound as good or better than any of my top end dynamics...including the 600's, CD3000's, and 931's.

But then again, I'm running them through my 007t...

post #6 of 11
Quote:
Originally posted by edstrelow
These phones are electrets as sort of poor man's electrostatic, but still very good quality compared to most dynamics.
Well... depending on the state of the diaphragms after about 20 years... IME transducers don't have the greatest history of standing the test of time. Also there's more to any given pair of cans than just electrostatic/electret vs. dynamic...
post #7 of 11
Unlike true Electrostaticsm Electrets rely on a permanent bias on the diaphragm and I don't know how well this stands up over time. I am not sure how you could tell other than that they just wouldn' t loudly l, or would give obvious distortion.

Otherwise I have seen several electrostatic phones hold up 20-30 years, working well and not apparently damaged.

Still it is not a bad idea to inspect the diaphragms of any such used phone. The diaphragms are generally some mylar-type material with gold/silver or other metallic finish. If they arc over there will be holes in the diaphragm. But some phones with holes clean holes (i.e. no diaphragm material dangling from the hole) will still run without much obvious problem. Otherwise they may spark, or giving some noise due to shorting.
post #8 of 11
I sold the sr30+adapter to fewtch.You should receive them one of these days-i don t worry since parcels from Greece>>>US can take more than 3 weeks sometimes....I bought the pair from another head-fier about 4 months ago.Is a 20+ year "low bias" electret.While i had them they seem to work OK and the condition was excellent but the sound was nothing like a modern Stax or a HD600.Even the Stax sr003+srm212 baby electrostatic i had sounds much better than the sr34 ,althought i didn t have a quality speaker amp to drive them(only a Sony midi!-the reason i sold them).Maybe at their time(1982) the sound was better and the "permanent bias" is not that permanent
post #9 of 11
Thanks mecano. Some people have said that the main problem with the SR-34 is the SR-4, and cheap parts + crappy wiring inside (mid fi or even low fi stuff). At least that means maybe an improvement could be made (some rewiring and/or parts replacement) although I don't know if I would be inclined to do that... not really a DIYer.
post #10 of 11
As RickG already hinted at, Stax electrets have the unique advantage of working with all Stax adapters and amplifiers (except the portable SR001Mk2), be they normal, pro, or unbiased. They have the same 5 pin plug that Stax uses for their pro bias electrostatic headphones. I have a pair of SR-80 that sound decent with SRD-4/Marantz Receiver, but improve when used with my SRM-212 or SRM-3 amplifier. While they lack in many ways compared to HD600, they have advantages also, including one of the best midranges out there. I still prefer my other Stax headphones to them by a decent margin however.

Quote:
Even the Stax sr003+srm212 baby electrostatic i had sounds much better than the sr34 ,althought i didn t have a quality speaker amp to drive them
I take it you didn't try the SR-30 with the SRM-212 then?
post #11 of 11
Quote:
Originally posted by slindeman
I take it you didn't try the SR-30 with the SRM-212 then?
Actually i did but the sr003 was better and much louder out of the srm212(although slight improvement over the adapter).The sr80 you have was the "top" Stax electret model from the early 80's.I have an old HiFi Choice and the price catalogue at the back of the magazine says 140uk pounds for the sr30+srd4 and 220uk pounds for the sr80+srd4
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