Miracles in Audio, by luck, by good choices,by design or by tweaking...


I owned a low cost headphone for many years, the Fostex TH7B, first version( a new one close version exist Fostex TH7BK), semi-open headphone...I was never completely satisfied by any headphones I ever owned: Hifiman 400, Stax basic lamda, Stax 5 gold,Akg 340,Akg 701, beyerdynamic 990, and T150... Because in each of them with all their qualities I never listen to at the same times, a confortable headphone with natural timbre and voicing, with a good imaging and a realistic soundstage(not too close to my ears)...


For the last days I tweaked this Fostex, to damp his internal resonance I used sorbothane, I put some shungite stones at the exterior part of the cups and I use some Herkimer diamond in the interior pads( 3 at 120 degree) … Now this low cost headphones crush all my others if I sum all his qualities... For example his mids and voicing cannot beat the AKG 340 but among all my other headphones it is the best that is near that mids and it is more confortable, and with longer cable than the 340...His imaging is better and more realistic than the 340 etc etc...It is the same if I compare with the others...


His most important qualities is natural timbre and clear imaging,very precise pinned point accuracy and natural, so clear it crush for that ALL the others to dust...In the French audio circle the reviews were more than very positive few years ago...Diapason d’or and choc Classica...I am not the only one impressed buy the ratio quality/price... But remember that thesae reviewers dont tweak their headphone...The difference between before and after the tweaks are staggering...


Yes Miracles happens in Audio: cost is under 100 American dollars... Few years ago they cost me 50 bucks new... I never dreamed that I will go back to headphones...


I will enjoy your miracles stories of any kind ….My best to all...
128x128mahgister
I was actually referring to Mr. Owen's mix. He makes PVA mica/graphene mix and PU mica/graphene mix. The one to get is the PVA mix.

You can get PVA woodworking glue at any hardware store.

whostolethebatmobile

Do I need the glue for the graphene+ mica liquid?

I was thinking that the glue would be necessary with the material form of graphene not the fluid? am I wright?
No, Mr. Owen's PVA mix already has the PVA in the mix. The first lot I got from him was an alcohol blend, with no PVA. But it rubbed off much too easily. He solved this by making the PVA mix. By then I had already made my own PVA mix from the original mix.
Ok I understand..... I will ask Mr. Owen to add the PVA... Thanks my friend….


The only problem is the postal services....Alas! this corona crisis seems to be a big crisis with no end in sight....
Each action taken in one of the 4 embeddings are irreplaceable by another action in one or even by 3 different actions in all of the three other remaining embeddings...


For example the positive effects of a better control of the vibrations-resonance cannot be replaced by a better cleaning of the electrical grid of the house, or by a passive acoustical modification by changing some materials on the walls of my room, or in a more active way by introducing some Helmholtz resonator, or my "singing" resonator, or some Schumann generator...If you dont control the mechanical vibrations you will not be able to compensate that by acoustical modification of the space, passive or active one,or by some tweaks in the electrical grid...


Each modifications in each of the embeddings generate some specific effets that the other modifications cannot replace....


An audio system is a complex web of intrications between acoustical space, mechanical and electro-magnetic interaction...So complex that when you think about it and the way audio system are sold in any commercial office, that boggle the mind to think how incomplete is the information necessary to create a real hi-fi experience.... It is easy also to create the illusory belief that paying much money to go upgrading some gear from one rung of the scale going toward the higher one will give you real Hi-Fi... At best it is an half truth....


We cannot remedy the problems of the acoustical space of a room with a better dac, or a better amplifier, or a better speakers system... Same thing is true for the electrical grid....Upgrading an amplifier will not improve the electrical noise floor of the house....


If we remind ourself that the % of the S. Q. is for more than half of it dependent of these embeddings, not only of the electronic components, we begins to understand many false assumption about audio....

I say all that because this evening, changing slightly the orientation of some of my resonators gives me a better dynamic and a better image in the room....Slight change= Big improvement, sometimes....


Most of the times we need a new piece of gear like a fish need a bicycle....
I think Groucho Marx never said that.... :)