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Speaker amps for headphones - Page 173

post #2581 of 2717

Here's the layout diagram for the Robinette Box V3:

 

Robinette_Box_V3.png More info on the Robinette Box here.

 

RBInsideSpeakerEnd.jpg


Edited by robrob - 6/7/14 at 8:48am
post #2582 of 2717

Robinette Box With Bypass Switch and Simple TRS Disconnect Switch

Robinette_Box_XLR_TRS.png

TRS Disconnect switch disables the TRS jacks by separating the TRS grounds for use with balanced output amps. This adapter will work with single-ended and balanced output speaker amplifiers.

post #2583 of 2717

Robinette Box with Only 4-Pin XLR Output

Robinette_Box_XLR.png

This adapter will work with single-ended and balanced output speaker amplifiers.

post #2584 of 2717

Robinette Box with Only TRS Output

Robinette_Box_TRS.png

This type of adapter is only for amplifiers that have their negative speaker terminals tied together (common ground).


post #2585 of 2717
Nice work Robrob. This little device will save you plenty of money and give thousands of options that will sound as good or better than these headphone amps.
post #2586 of 2717
Hi RobRob, do you have the Robinette box that one can buy fully built so it's plug and play? Am not a person wi DIY skills so something I can buy off the shelf and be assured it works will be best smily_headphones1.gif
post #2587 of 2717
Quote:
Originally Posted by Rossliew View Post

Hi RobRob, do you have the Robinette box that one can buy fully built so it's plug and play? Am not a person wi DIY skills so something I can buy off the shelf and be assured it works will be best smily_headphones1.gif

 

Sorry, but I don't build them for hire. The parts are pretty expensive and the build is easy but tedious and relatively labor intensive so there's not much room for profit. I'm also pretty busy with a lot of other projects.

post #2588 of 2717
Quote:
Originally Posted by robrob View Post
 
Quote:
Originally Posted by Rossliew View Post

Hi RobRob, do you have the Robinette box that one can buy fully built so it's plug and play? Am not a person wi DIY skills so something I can buy off the shelf and be assured it works will be best smily_headphones1.gif

 

Sorry, but I don't build them for hire. The parts are pretty expensive and the build is easy but tedious and relatively labor intensive so there's not much room for profit. I'm also pretty busy with a lot of other projects.

Yeah, it took me many hours, really. Took at least an hour if not more just to drill holes and mount the switches etc., the soldering took several hours and I had to do some trouble shooting. I don't think it's possible to make such a box by hand in less than an hour, even with proper tools.

post #2589 of 2717
Quote:
Originally Posted by robrob View Post
 

 

Sorry, but I don't build them for hire. The parts are pretty expensive and the build is easy but tedious and relatively labor intensive so there's not much room for profit. I'm also pretty busy with a lot of other projects.

Understood : ) Thanks anyway!

post #2590 of 2717
Does anyone know if i can just connect the Hifiman HE-4 directly to a Fiio A1 speaker amp?
post #2591 of 2717
Quote:
Originally Posted by escobar090 View Post

Does anyone know if i can just connect the Hifiman HE-4 directly to a Fiio A1 speaker amp?

Here is a link:

 

http://fiio.com.cn/news/index.aspx?ID=84&page=9

 

To a post where someone has apparently done just that.  I don't like that he used a TRS jack on the thing, but he seems to have gotten away with it.  Go balanced if you can, but if not, it looks as if shorting the grounds together is ok.

 

Be careful of the volume knob until you get a feel for how much knob turning you can do comfortably.

post #2592 of 2717
The thing with balance is that the cabling gets expensive right? I have absolutely no idea how to cable the HE4 to the Fiio A1 but if it is inexpensive (amp+cabling together) i would give it a go
post #2593 of 2717

If you know how to solder and have the tools, it can be done for under $10 (most of the cost will be in the connectors). Some nicer cabling/etc can bring it up to $30-50 or easily more if you use boutique parts and wires.

 

The non-DIY option is to just buy the balanced cable and speaker adapter from Hifiman.

post #2594 of 2717

RobRob, u are the best. It's looking better and better. Do you guys know anybody makes it in Italy/EU?

post #2595 of 2717
Quote:
Originally Posted by hennessys View Post
 

RobRob, u are the best. It's looking better and better. Do you guys know anybody makes it in Italy/EU?

No, sorry, I don't know of anyone making them commercially.

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