You can trim the voltage up or down by introducing a trimpot in either R1 or R2 (of course reducing the value of the appropriate resistor accordingly). This circuit does work but nowhere near as elegantly as Wakibaki's contribution to this old thread. His circuit is cleaner and rather better...

Hiya G3 My method of repair was to carefully remove the frayed outer sheathing back to the split and razor it off neatly. I then filled this void with a piece of insulation taken from some other cable I had laying around. Then I used some 4x shrinkable heatshrinking to cover this (split...

Yeah I did exactly what you propose doing. It looked nice and neat and worked for a week or so, but then the cable covering split from the repair for another inch or so. I cannot work out why this should have happened; the outer sheath covering of the cable ended up splitting from the Y piece...

I had exactly the same problem. After just over a year of careful use mine frayed just as in your pictures. Every time I repaired it the cable would split further and further from the repair. I got so hacked off with it I bought a cheap after market cable off Ebay and slung the Sennheisers...

This should be OK http://cpc.farnell.com/stontronics/s2171mn/ac-dc-linear-psu-12v-300ma-2-1mm/dp/PW02830 Only about five quid and free postage. Plenty more models to choose from from this top UK supplier.  

This transformer issue isn't new. Years ago I had the original electrostatic floats and had 2 transformers fail. The original UK importer told me to handle the energiser box (which contained the transformer) with kid gloves because he'd found that they didn't transport very well and wouldn't...

Had some for a while - put about 150 hours on them but never liked the sound signature at all. Found they had a disturbing lack of upper treble detail which to me made them sound airless. I also detected a touch of overhang in the bass which clouded the detail on complex musical passages. If...

I've played around with amps with different output impedances but don't notice any great variations in the basic sound signature. One thing I would point out is that my criticism of the BA200 has been based around the chance to listen to them during the seasonal holidays on a home system with a...

Interesting spot tomscy. I'll dust down a couple of my old DIY amps - one has an output impedance of 10 ohm the other 80 and see what effects I notice. The only amps I've tried have been sub 1 ohm incidentally. Can't see it'll make too much difference but then we all know what happens to the...

I seem to be at such a variance with you other guys on these that I'm still wondering whether I've received a faulty pair. I'm currently trying out all the various tips I've accumulated over the years and there are slight (but not night and day differences) in reproduction. I'm also juggling...

Thanks for the reply ClieOS but I can't get too enthusiastic about any IEM where the top octave is rounded off. I kinda like to hear all the notes on my music collection. I'll see if I can adjust but these IEMs are smoothed to soporific levels IMHO.   

Got my BA200 as a Christmas gift. I've only got about a dozen hours on them and am still getting to terms with sound. They have an attractive full blooded and forthright sound from the mid range downwards but they seem to have a constricted treble which makes for a rather closed...

Have beginnings of agreement with the op particularly as some quite inexpensive IEMs (GR07, PFE 112) ,when carefully amped, in my opinion show up the depressing mediocrity of some "mid fi" full size cans - I'm thinking of HD650, AKG 701 et al. Lately I've been listening to my iems on my home...

Had a mallet finger 19 years ago. Sort of healed up in about 6 weeks but the joint is STILL swollen and clicks loudly from time to time. Hope your outcome is better! 

Supersonido in Spain have been knocking out the HD800 with about a 33% discount for ages now. Last price delivered (from memory) was just over 700 euros. As far as I know they are a big reputable set up - probably only deliver to the EEC though; since I cannot read Spanish I'm not sure whether...

Well my experience is that they are pretty naff. The pads to solder flying leads to are feeble and easily lift; the shaft is a small non standard size and you'll probably need to source a specific knob. The contacts get very noisy after a few weeks. You are always searching for that "in between"...

The reason for my concern is because many years ago I had some AT ATH7 phones bought new (more years ago that I care to recall) that were quickly superceded by the purchase of some Stax Lambdas. I kept the AT's as a spare phone. Some years later when the Stax's were traded up I dug out the ATs...

I'll be keeping my fingers crossed for you on these Nick; they had a reputation for the electret capsules to depolarize after a few years (let alone 30+!). To be fair to other potential purchasers do try them out - you'll soon know if depolarization has taken place by a distant weedy sound...

DT48E - Quite the most horrible phone I've ever had the misfortune to purchase in 40 years of headphone enthusiasm.

To reasure Spartan I listened to these phones through a variety of extremely well respected amplifiers (solid state and thermionic) and with a variety of top quality front end systems,including SACD etc. The better the source and the longer I listened (forced myself to listen for many hours)...

As someone who had 18 months recent experience with DT48 phones I find this thread with the extended eulogy of these quite awful phones the most depressing I've ever encountered on this site. The phones are BRUTALLY rolled off at the frequency extremes - any potential purchaser should be...

There is a very interesting thesis floating around the web somewhere (can't find it at the moment) where with electron microscopy it can be demonstrated that favoured electrical pathways in some semi conductor devices develop over a period of time. The author I seem to remember was from...

DT48 - so incredibly poor and yet still much vaunted by a couple of guys who post ad nauseam around here.

I too wasted a pile of dosh on dt48s after reading the bulled up reports on them. The very worst hi fi purchase I've ever suckered myself into. Take it from me they are seriously bad - I've got a newish pair here which will probably sit in a drawer until I fill a wooden suit. They are coloured...

Sometimes with these suggestions I don't know whether to laugh or to cry. AKG 501? Ety? DT48?? these are totally (almost irresponsibly) daft recommendations. The only viable option is the top of the range Stax which I always have preferred to the to the K1000 anyway. I have owned (or still...