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Speaker amps for headphones - Page 167

post #2491 of 3116
What resistor values are you using in the box?
post #2492 of 3116

Interesting kickstarter for an "all-in-one" integrated with a phono pre. I love the compact footprint!

 

https://www.kickstarter.com/projects/2090572321/mies-i100-the-ultimate-amplifier-for-vinyl-lovers

post #2493 of 3116
Quote:
Originally Posted by potterma View Post

What resistor values are you using in the box?

Original values of 6 ohms (5 watts) between the positive terminals and 2 ohms (3 watts) bridging the + and - wire after the first resistor. 

post #2494 of 3116
Quote:
Originally Posted by Zoom25 View Post

 

Which one you thinking about?

 



Either PM8004 or PM8005 not sure which one, I have to do lot of reading before I buy smily_headphones1.gif lol.
post #2495 of 3116
Quote:
Originally Posted by Zoom25 View Post

 

Nope. Don't have a HD800. Might have considered it way back, but the treble and lack of bass slam doesn't do it for me. Same thing goes for stats. I'm sure a lot of people love it for the clarity and detail, but at the end of the day, are you having fun?

 

I have yet to experience a headphone that can throw a proper soundstage to make it seem like the image is coming from the front. While the Denon/Fostex are closed, they still IMO offer realism. Listening to live events, the reverbs are perfect to match what it sounds like to be there. I couldn't get that with Audeze.

 

Having said all that, speakers > headphones, any day of the week. That's why I got rid of LCD-3 to fund speakers and then get a TH-600 or TH-900 on the side to replace my D2000 eventually. No need to carry separate amps or DACs. The Dangerous Music Source will drive both headphones and monitors with a good dac and amp. Not to mention solid features.

 



If you have time you can visit Bay Bloor Radio, I bought my 2nd HD800 from them at Black Friday special price.
It really come close to the speaker experience IMO. You can ask them with HDVD800.

Also I know lot of people hate Grados, but PS1000 is just another headphone that sounds like speaker, something really nice about. You can also audition at Bay Bloor Radio. smily_headphones1.gif
post #2496 of 3116
Quote:
Originally Posted by Drsparis View Post

Original values of 6 ohms (5 watts) between the positive terminals and 2 ohms (3 watts) bridging the + and - wire after the first resistor. 
Yeah, that only gets you 12 dB of attenuation. Use Robs calculator and find a resistor combination that gets you 20 or more dB.
post #2497 of 3116
Quote:
Originally Posted by potterma View Post

Yeah, that only gets you 12 dB of attenuation. Use Robs calculator and find a resistor combination that gets you 20 or more dB.

Thanks,
How important is the effective speaker load? M'y biggest problem is sourcing weird configurations lol
post #2498 of 3116
Quote:
Originally Posted by Drsparis View Post
 

I know some people have experience with this setup but I can't seem to find an answer. I have a pair of  XLR terminated HD800's and a Millenia MG3 and am looking to lower the noisefloor. Just finished building Robrob's prefered resistor network and sadly it didn't help much. Anyone know what kind of resistors...  I mean specifically what resistors I should be using to lower the noisefloor from a nearby waterfall to, well as black as possible?

 

I used the leads of the resistors as the "wires" inside the resistor box, is that acceptable practice? lol. Also I am using wall power and not battery, I'm aware that this may make a difference but would prefer not to rely on batteries charging external battery packs seem to be sketchy as I have to watch them carefully. Maybe there is no other way?

 

Sound seems MUUUCH better than my 0404 lolol, but noisefloor and absolutely no volume control ( as soon as right channel kicks in it's already loud enough).

 

Thank you for any input on this matter. 

 

If 12db isn't even close then I'd suggest the 8 and 1/2 ohm resistors for 25db of attenuation. Using the resistor leads as the 'wires' is the preferred method and helps minimize solder joints.

 

Headphone_Network_Common_Values.jpg

post #2499 of 3116
Quote:
Originally Posted by Drsparis View Post


Thanks,
How important is the effective speaker load? M'y biggest problem is sourcing weird configurations lol

 

It's not that critical to most amps. You can move up to 23db of attenuation by replacing your 8 ohm resistor with a 25 ohm resistor. But I'd recommend you replace both while you're in there to keep your speaker load ideal.
post #2500 of 3116

if you have an amp with 20+dB gain that is known for noise problems, and you're stuffing 20+dB of attenuation at the output just to make it listenable...

post #2501 of 3116
Quote:
Originally Posted by Armaegis View Post
 

if you have an amp with 20+dB gain that is known for noise problems, and you're stuffing 20+dB of attenuation at the output just to make it listenable...

 

Good point.

post #2502 of 3116
Quote:
Originally Posted by Armaegis View Post
 

if you have an amp with 20+dB gain that is known for noise problems, and you're stuffing 20+dB of attenuation at the output just to make it listenable...

Lol, but but... people have gotten great results....
On a more honest note I just can't get myself to sell it for half the price I bought it for and I don't want to just leave it lying around lol.

post #2503 of 3116
Quote:
Originally Posted by robrob View Post
 

 

If 12db isn't even close then I'd suggest the 8 and 1/2 ohm resistors for 25db of attenuation. Using the resistor leads as the 'wires' is the preferred method and helps minimize solder joints.

Thanks , for some reason speaker load was the reason for noisefloor. Thought this would help it, ill try 8 and .5

post #2504 of 3116
Quote:
Originally Posted by Drsparis View Post
 

Lol, but but... people have gotten great results....
On a more honest note I just can't get myself to sell it for half the price I bought it for and I don't want to just leave it lying around lol.

THIS is exactly the point of the resistor box.  You've got an amplifier, let me throw an attenuator on the output to turn it into a great headphone amp!

post #2505 of 3116
Quote:
Originally Posted by Canadian411 View Post
 
Quote:
Originally Posted by Zoom25 View Post
 

 

Which one you thinking about?

 



Either PM8004 or PM8005 not sure which one, I have to do lot of reading before I buy smily_headphones1.gif lol.

 

Good luck with the readings. I wonder how the mid tone control is implement. FWIW, the treble and bass control don't affect the mids at all on PM6004.

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