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| Portable Headphone Amps Discussion of portable headphone amps. |

07-24-2008, 09:01 AM
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100+ Head-Fi'er
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Join Date: Jul 2008
Location: Mission Viejo CA
Posts: 319
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Amplifier Burn In...
Im planning on getting an RSA Predator,
and since it has such an enormously long burn time i was wondering how i should go about burning it in.
I will use it brand new but i also want to burn it in while im not using it.
What is an effective way to burn it in? using headphones and the usb?
Any help is appreciated.
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07-24-2008, 02:22 PM
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1000+ Head-Fi'er
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Join Date: Oct 2006
Location: Sydney, Australia
Posts: 1,291
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Do a search for 'burn in' for more comprehensive advice.
I used a PC source up to 16 hours per day, 4-5 hours at a time with breaks in between. Various headphones.
I used pink noise and frybaby.mp3 (Google to get them).
This allowed burn in of DAC and Amp components. There were definite changes all the way up to 1200+ hours.
And it was just a delight once it reached those hours.
Good luck with your burn in.
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07-24-2008, 02:42 PM
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500+ Head-Fi'er
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Join Date: Oct 2005
Location: Toronto, ON
Posts: 899
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Another user, rico67, had made a resistor plug that puts a much larger load on the amp, and had found that it nearly halves the burning time required. I've ordered one of these high-load resistors from him (since he makes them himself), and we'll see how it goes (once I receive it).
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07-24-2008, 02:46 PM
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500+ Head-Fi'er
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Join Date: Dec 2007
Posts: 517
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Use, itune library on random and continous, or burningwage generator (free soft) and plug your predator through usb (to burn the dac ).
you can plug your headphone on the predator or an adaptated load (10 homs) to avoid noises and burn with more efficient.
Normal burning time for Predator is :
200 hours to burn the internal dac.
1200 hours for the amp section.
to burn the amps section of the predator, you can plug it through a radio.
Hope, it's usefull.
break times are necessary too, 1 or 2 hours a day to form the cap.
__________________
The best is yet to come !
RWA Imod-ALO Vcaps and cables (jumbo cryo) -RSA Hornet - Grado GS 1000.
Predator in burning process...
waiting for ALO X cryo silver cables.
All burn'in with my greats Burn'in plugs.
Heard the sound but don't forget the Music.
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07-24-2008, 05:05 PM
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Head-Fi'er
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Join Date: May 2008
Location: Singapore
Posts: 79
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Quoted from the golden mouth in his email reply:
"Simple, just connect it to any portable source & connect to it any high impedance headphones & set the source to play in a non stop mode.
Cheers.
Ray Samuels"
__________________
Exploring the path of audio bliss ...
Ipod 5th Gen->Ultimate Link Silver Master-i->Predator->Shure SE530
HeadFi feedback
Ebay feedback
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07-24-2008, 05:12 PM
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Head-Fi'er
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Join Date: Jan 2006
Location: Leeds, UK (but work all over UK & Europe)
Posts: 65
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Quote:
Originally Posted by ralfale
Quoted from the golden mouth in his email reply:
"Simple, just connect it to any portable source & connect to it any high impedance headphones & set the source to play in a non stop mode.
Cheers.
Ray Samuels"
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Would grado sr225 count as high though as a) all i got and b) stated on packaging as low (30 ish I think)
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07-24-2008, 05:51 PM
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Headphoneus Supremus
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Join Date: Apr 2008
Location: El Cerrito, CA
Posts: 1,593
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No, you'd want a "really" high impedance phone, like a Senn HD650 (300 ohm) or Beyer DT880 (either 250 ohm or 600 ohm).
__________________
Cans: Sennheiser HD650 w/ APS V3 (Furutech)
Amp: Woo Audio WA3+ (soon to be re-capped)
Tubes: Pre: Siemens 6922 & 7308, Amperex 6DJ8 Bugle Boys Power: Tung-Sol 5998 & 7236
Source: Denon DVD-1920, Monarchy DIP Combo, Oritek OMZ v4.1 DAC
Power: Furman PL-8 II, Parasound AWG12 x3
Cables: Signal Cable Ag Resolution w/ Eichmann Ag Bullets, Tributaries Ag Series SVC x2
Team Bay Area
I can has feedsbak?
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07-24-2008, 06:38 PM
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100+ Head-Fi'er
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Join Date: Jan 2006
Posts: 166
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why high-impedance specifically? is that just to get more current through the amp? couldn't you get the same results by using cheap earbuds (at same gain and volume that you would use for high-impedance phones)?
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07-24-2008, 06:40 PM
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100+ Head-Fi'er
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Join Date: Jul 2008
Location: Mission Viejo CA
Posts: 319
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Thanks for all the replies.
Whats the best way to burn it in without noise?
Is there any way to do it without an adaptive load?
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07-25-2008, 12:58 PM
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Head-Fi'er
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Join Date: Jan 2006
Location: Leeds, UK (but work all over UK & Europe)
Posts: 65
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Quote:
Originally Posted by tha_dude
why high-impedance specifically? is that just to get more current through the amp? couldn't you get the same results by using cheap earbuds (at same gain and volume that you would use for high-impedance phones)?
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Have emailed Ray to check on his view of my low impedence Grado 225's burning in the Pred, will let post here when he replies
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07-25-2008, 08:05 PM
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500+ Head-Fi'er
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Join Date: Dec 2007
Posts: 517
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Quote:
Originally Posted by Deadneddz
Thanks for all the replies.
Whats the best way to burn it in without noise?
Is there any way to do it without an adaptive load?
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Resistors load instead of an headphone.
__________________
The best is yet to come !
RWA Imod-ALO Vcaps and cables (jumbo cryo) -RSA Hornet - Grado GS 1000.
Predator in burning process...
waiting for ALO X cryo silver cables.
All burn'in with my greats Burn'in plugs.
Heard the sound but don't forget the Music.
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