This is exactly what I had in mind!
Sent from Moto G XT1033 w/ Faux kernel.
I can't stress what you have stated. I believe a lot of amps don't have the common ground feature. While someone could have the desire to use a speaker amp to drive the headphones, there's also a likely chance that the amp could fail. Also, driving a pair of headphones with dynamic drivers is different than drive a pair of ortho headphones. The ortho headphones can take a lot more power. I know the Superlux can take only about 300 mW of power.
Are those custom cables? If so, that is some impressive handy work!
Have you got any experience with making custom ear pads? I've made custom ear pads for my ****ty gaming HP just because the originals felt like balls and my ears touched the housing on the inside, so I was force to sew up a pair out of an old cotton tshirt and a car washing sponge. The only bad thing in the design was the sponge, it's way too hard for comfort but they gave the correct distance for my ears not to touch the housing. I think I'll be trying this method again for the Pro80s but using something softer. Maybe a whole lot of cotton wool.
If that is really the case, then I would have to be much more cautious then I first thought. The Pro80s use dynamic drivers. How does one check if the ground is common. If I crack the lid open and check the wiring, will there be anything to indicate this? I recall looking in several old electrical equipment I've looked into and from what I can recall, the ground goes straight into the base or housing by just one ground wire. Sorry, I'm a bit of a noob when it comes to circuitry, but I am good with a soldering iron.
Well the amp is not exactly one of those antique wooden amps. It's over 10 years old but still a digital amp nevertheless. But as I recall, it sounded very good back when I used to use it. I've got it in front of me now and the first thing to point out, it does not have a HP jack, nor does the GPO plug have a ground pin. So the ground must be going into the case, as I suspected. Which I can only assume that the ground is shared.
Well just my luck. There are no wiring/circuit diagrams for this amp. It's not exactly a popular one. It's a Sansui HTS 105 which is from what I can gather a rebranded Toshiba amp. I guess Ill have to go with my gut on this one and see what I can do with experimenting with it. Not even exactly sure how many watts are actually coming out of the channels and I can't find my multimeter...
The ground wires seem to go to a separate smaller coil (looks like a tiny amp or electric motor circuit) could that be the ground circuit. I don't see any wires terminating into the case itself.
I can't find my 3.5mm femal to RCA adapter. Ill need to get a new one to try this mod. Hopefully soon. I'll keep you guys posted.
Wow! This subject is really all over the place. I've been researching this everywhere and really can't get a straight answer. Some say it's perfectly OK. Others say you can blow you amp pretty much instantly or from a variations in the current.
So I decided, I will probably not risk it for the sake of not damaging my headphones just in case. They're only 60 Ohms and I would much rather keep them for a few years. :)
I will be sourcing a second hand amp with a headphone jack. Hopefully I will try and find whoever has my mums old 600W Sony amp which has 2x 6.3 HP jacks and was "studio" rated, apparently. Probably just a marketing gimmick, but it did cost $800 with the speakers. Who knows.
PS. Sorry for the rambling :P
What do you guys think about these pads?
These don't look so different to your Takstar pads. Trust me the HM5 pads will be better. Unfortunately MP4Nation are out so waiting to see when they will replenish