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| Portable Headphone Amps Discussion of portable headphone amps. |

01-08-2007, 04:11 PM
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Headphoneus Supremus
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Join Date: Nov 2004
Location: Santa Rosa, CA --image Katmandu, Nepal Summer 2006 *We are but a cosmic blink or was that wink?*
Posts: 7,601
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Excellent comparative study of the amps. Not an easy task and it would drive me nuts after a while. Thank you for the hard work that you appear to have enjoyed and for sharing the results in a very readable form.
__________________
John aka Jam and Jama
Photo gallery at: www.pbase.com/jamato8 Recent publication: Ethnobotany Research & Applications, Vol 7 (2009) Kam Guilzhouh nyim Guangxxih di Benxtux Wenchual nyim Zihyuanc dih Gonxliix: Kam Local Indigenous Knowledge and Sustainable Resource Management in Guizhou and Guangxi Provinces, China http://www.ethnobotanyjournal.org/
The one constant in life is change, so will that change?
Feel with your own heart, see with your own eyes and hear with your own ears.
JH13's > Why stay home when you can go to the concert?
Listening with: JH13 Pro, Grado HF2 #469
Digital conversion: the all new MB-1 optical dual Wolfson portable dac
Amps I am currently listening with: RSA P-51 Mustang, SR 71A, iBasso D10, Lisa III, OEM BLack Gate, Non Black Gate, iBasso P3+, iBasso T3 (new version), RSA Shadow, iBasso D4
Favorite monitors: JH13 Pro, Grado HF2, Ultrasone Ed. 9 #1010, ATH-ESW10JPN
Portable monitor ratings: 1. JH 13 Pro 2. ESW10 JPN 3. PortaPros, KSC35 (modified-a great value) *4. UM2
Source: iRiver H130,140, D303 optical out, D-EJ955, D-EJ1000, D-EJ2000, 25s, 25, D-303, D-777 and others (optical out if available)
Digital Conversion: MB-1 optical Dac, Altoid tin Monica Dac I, Altoid tin Monica II Asynchronous Reclocking Dac, iBasso D10
Headphone Amplifiers:RSA: Shadow, Predator, P-51 Mustang, SR71A, Xin: IV Micro, IV Mini, Reference, SM3B, SuperMacro V LE, SM3 V6 (IV all switches), XRTA X-1, C&C Box, iBasso: P1, P2, P3, P3+, T1, T2, T3, T4 D1, D2, D3, D4, D10 Woo 3 Modified-Siemens 6922 driver, 7236 power tube, Woo 6 with the original Pseudo dual PS -
Ear Monitors: JH13 Pro, Ultra Ed. 9, Grado HF-2/F1 #469, HD650, ATH-ESW10 JPN, Ultrasone 750, HFI780, PortaPro modified, KSC35, Equation RP-21, Westone UM2
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01-08-2007, 05:21 PM
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100+ Head-Fi'er
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Join Date: Dec 2006
Location: USA
Posts: 344
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good review. would have liked to see how the go-vibe v5 compares to the rest of the pack when listened to with the elpac psu, but that obviously isn't fair to the other amps listed and would require a lot more testing and such and so forth. Otherwise, thanks for the time and effort put into this  Very informative and a great starting point for portable amp purchases who sole use will be with batteries.
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01-08-2007, 09:07 PM
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Banned
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Join Date: Jan 2007
Posts: 37
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Thanks for the nice review. I would only have liked to see the mSEED LABS Faith AMP included in it, besides the XTRA X-1. Perhaps the C&C BOX too...and while I'm at it, the Minibox-E.
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01-08-2007, 09:42 PM
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Headphoneus Supremus: Reviewerus Prolificus
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Join Date: Apr 2005
Location: Chicagoland
Posts: 11,439
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Quote:
Originally Posted by inconnu
Thanks for the nice review. I would only have liked to see the mSEED LABS Faith AMP included in it, besides the XTRA X-1. Perhaps the C&C BOX too...and while I'm at it, the Minibox-E. 
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I actually wanted to include the mSeed, but I kept losing the EBay auctions
Maybe I will get one and add it when I add the Xenos 1HA, which seems to have shipped.
__________________
PLEASE NOTE: Due to the volume of PM's I have been receiving in connection with my reviews, I no longer have the time to answer PM's from people with zero posts. Please read head-fi first before asking questions.
Team GO-U-NORTHWESTERN
Pics: Main Home Rig; Bedside Rig; Office Rig; Portable Rig;
Headphones: JVC HP-DX1000, HA-RX900; Headphile Deep Cup Darth Beyers VXD3,VXD4; Beyerdynamic DT990/600 (Manufaktur) DT770/600 (Manufaktur), DT880/600 Balanced (Manufaktur); HiFi-Man HE-2 Planar Magnetic; Sennheiser PXC-350; Shure SRH840
Home amps: Ray Samuels Audio Stealth (Mullard ECC32/CV4003); Decware Zen CSP-2 (Amperex BB 6DJ8/Sophia Princess 274B); Darkvoice 337 (GEC 6AS7G's/Tung-Sol mesh plate 6SJ7GTs); Wheatfield Audio HA-2 (Mullard ECC32/GEC 6AS7G/GEC U52); Ming-Da MC84-C 07 (Mullard CV4004/EL84/EM87); Audiotailor Jade (GEC 6AS7G/Sylvania 5751); J. Sound Lab Headphone (Mullard 12AT7); Audio-GD Phoenix; Musical Paradise MP-301 (Ken-Rad 6V6GT/Mullard 6AU6)
Portable Amps: Ray Samuels Audio P-51 Mustang; Decware ZenHead; Qables iQube
Sources: Denon DP59L table + Clearaudio Maestro Wood / VPI Scoutmaster + Benz Micro Wood L2 > Audio Electronics PH-1 DJH Phono Preamp; Music Hall 25.2 DAC; Denon DVD-5900;Red Wine Audio iMod iPod (Apple Lossless) & ALO VCap dock; Sony SCD-555ES SACD player
Loudspeaker system: Krell KAV250 Preamp>Sunfire Signature II Power amp > B&W Nautilus 800 Signatures + Velodyne FSR-1500/Martin Logan Descent
Tube testers: B&K Dyna-quick 650 & Dyna-Jet 606
Head-fi feedback
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01-10-2007, 08:45 AM
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100+ Head-Fi'er
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Join Date: May 2004
Location: Melbourne, Australia
Posts: 225
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Thanks Skylab for the professional review. I have just received my Tomahawk today and am already quite amazed at its performance. It even drives the HD650s really well - something that I did not expect at all.
BTW, I also enjoy the sound of Jan Meier's amps like yourself.
Thanks again and cheers,
cansman
__________________
"What we do in life echoes in eternity."
SOURCES
DAC1 USB, iQube V2, Pico, iPod 80GB classic
HEADAMPS
DAC1 USB, iQube V2, Pico, Tomahawk
CANS
HD650, ER-4S, HD238
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01-10-2007, 03:12 PM
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Head-Fi'er
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Join Date: Jan 2007
Posts: 84
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very informative , very professional , yet presented in a easy to digest way for those of us that are new to this ummmm addic... hobby :P
look forward to your doing more reviews of amps and/or cans.
a MUST sticky IMO
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01-10-2007, 08:39 PM
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500+ Head-Fi'er
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Join Date: Jan 2005
Location: Sheffield, UK
Posts: 841
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Mr Skyab Sir...
Have you received your replacement X1 yet?
__________________
Cheers!
Josh
Minister of Audio Affairs
My Portable Head-Fi Equipment:
Apple iPhone 3G 16GB :: Qables Copper iPhone LOD :: Graham Slee Voyager :: Ultimate Ears Super.Fi 5Pro's
My Home Head-Fi Equipment:
Apple Macbook :: Keces USB DAC :: Graham Slee "Green" Solo :: Sennheiser HD-650
My Feedback: Head-Fi :: eBay
... Sorry about MY wallet!
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01-11-2007, 03:01 AM
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Headphoneus Supremus: Reviewerus Prolificus
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Join Date: Apr 2005
Location: Chicagoland
Posts: 11,439
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Quote:
Originally Posted by MrJoshua
Mr Skyab Sir...
Have you received your replacement X1 yet?
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As of yet, no. But I doubt the defective one has even made it to China yet.
__________________
PLEASE NOTE: Due to the volume of PM's I have been receiving in connection with my reviews, I no longer have the time to answer PM's from people with zero posts. Please read head-fi first before asking questions.
Team GO-U-NORTHWESTERN
Pics: Main Home Rig; Bedside Rig; Office Rig; Portable Rig;
Headphones: JVC HP-DX1000, HA-RX900; Headphile Deep Cup Darth Beyers VXD3,VXD4; Beyerdynamic DT990/600 (Manufaktur) DT770/600 (Manufaktur), DT880/600 Balanced (Manufaktur); HiFi-Man HE-2 Planar Magnetic; Sennheiser PXC-350; Shure SRH840
Home amps: Ray Samuels Audio Stealth (Mullard ECC32/CV4003); Decware Zen CSP-2 (Amperex BB 6DJ8/Sophia Princess 274B); Darkvoice 337 (GEC 6AS7G's/Tung-Sol mesh plate 6SJ7GTs); Wheatfield Audio HA-2 (Mullard ECC32/GEC 6AS7G/GEC U52); Ming-Da MC84-C 07 (Mullard CV4004/EL84/EM87); Audiotailor Jade (GEC 6AS7G/Sylvania 5751); J. Sound Lab Headphone (Mullard 12AT7); Audio-GD Phoenix; Musical Paradise MP-301 (Ken-Rad 6V6GT/Mullard 6AU6)
Portable Amps: Ray Samuels Audio P-51 Mustang; Decware ZenHead; Qables iQube
Sources: Denon DP59L table + Clearaudio Maestro Wood / VPI Scoutmaster + Benz Micro Wood L2 > Audio Electronics PH-1 DJH Phono Preamp; Music Hall 25.2 DAC; Denon DVD-5900;Red Wine Audio iMod iPod (Apple Lossless) & ALO VCap dock; Sony SCD-555ES SACD player
Loudspeaker system: Krell KAV250 Preamp>Sunfire Signature II Power amp > B&W Nautilus 800 Signatures + Velodyne FSR-1500/Martin Logan Descent
Tube testers: B&K Dyna-quick 650 & Dyna-Jet 606
Head-fi feedback
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01-11-2007, 03:31 AM
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500+ Head-Fi'er
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Join Date: Dec 2005
Location: Temporarily- Kosta Browne Vineyards
Posts: 857
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Wow skylab fantastic and very professional review. You have reinforced my satisfaction in selecting (and luck) the PRII to be my first portable amp. Somehow this needs to become a reference source for all those newly traveling down the expensive slippery slope of portable ampland.
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01-11-2007, 05:49 AM
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100+ Head-Fi'er
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Join Date: Oct 2006
Location: Ottawa, Canada
Posts: 126
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Thank you for the well organized and very informative review.
I put a great deal of stock in reviews of this nature.
Good job!
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01-11-2007, 07:48 AM
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100+ Head-Fi'er
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Join Date: Aug 2005
Location: Seattle, WA, USA
Posts: 134
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another thumbs up!
__________________
: shure e2c (kramer mod) : sennheiser pmx60 : grado hf1 no. 345 : sennheiser cx300 : koss ksc75 : akg k81dj : sennheiser hd580 w. hd600 grills:
: echo indigo dj : ipod 5g 30gb : ipod mini 4gb : ipod shuffle 1g 1gb :
: go vibe v3 ad8066 :
: previously :: grado sr60 : audio-technica a500 :
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01-24-2007, 06:38 PM
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Headphoneus Supremus: Reviewerus Prolificus
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Join Date: Apr 2005
Location: Chicagoland
Posts: 11,439
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Update 1/24/07
I have purchased a couple other portable amps since I first published this review, the Xenos 1HA-EPC and the iBasso P-1, and I got my Xtra X-1 repaired unit back. I have run the new amps through the full battery of tests described above. I have added full comments on the X-1. I have not done so on the Xenos or iBasso amps, but will as time permits. I have decided to do an updated rankings. These are all now in the original review post.
EDIT: PLEASE READ THE WHOLE UPDATE before commenting. As I indicate there, since I no longer have the Practical Devices XM4, I could not decide directly between the iBasso and the XM4, so I list them as a TIE.
__________________
PLEASE NOTE: Due to the volume of PM's I have been receiving in connection with my reviews, I no longer have the time to answer PM's from people with zero posts. Please read head-fi first before asking questions.
Team GO-U-NORTHWESTERN
Pics: Main Home Rig; Bedside Rig; Office Rig; Portable Rig;
Headphones: JVC HP-DX1000, HA-RX900; Headphile Deep Cup Darth Beyers VXD3,VXD4; Beyerdynamic DT990/600 (Manufaktur) DT770/600 (Manufaktur), DT880/600 Balanced (Manufaktur); HiFi-Man HE-2 Planar Magnetic; Sennheiser PXC-350; Shure SRH840
Home amps: Ray Samuels Audio Stealth (Mullard ECC32/CV4003); Decware Zen CSP-2 (Amperex BB 6DJ8/Sophia Princess 274B); Darkvoice 337 (GEC 6AS7G's/Tung-Sol mesh plate 6SJ7GTs); Wheatfield Audio HA-2 (Mullard ECC32/GEC 6AS7G/GEC U52); Ming-Da MC84-C 07 (Mullard CV4004/EL84/EM87); Audiotailor Jade (GEC 6AS7G/Sylvania 5751); J. Sound Lab Headphone (Mullard 12AT7); Audio-GD Phoenix; Musical Paradise MP-301 (Ken-Rad 6V6GT/Mullard 6AU6)
Portable Amps: Ray Samuels Audio P-51 Mustang; Decware ZenHead; Qables iQube
Sources: Denon DP59L table + Clearaudio Maestro Wood / VPI Scoutmaster + Benz Micro Wood L2 > Audio Electronics PH-1 DJH Phono Preamp; Music Hall 25.2 DAC; Denon DVD-5900;Red Wine Audio iMod iPod (Apple Lossless) & ALO VCap dock; Sony SCD-555ES SACD player
Loudspeaker system: Krell KAV250 Preamp>Sunfire Signature II Power amp > B&W Nautilus 800 Signatures + Velodyne FSR-1500/Martin Logan Descent
Tube testers: B&K Dyna-quick 650 & Dyna-Jet 606
Head-fi feedback
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01-24-2007, 07:24 PM
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Headphoneus Supremus
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Join Date: Nov 2006
Location: Wherever I lay my head at the moment!
Posts: 2,532
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So, #3 and #4 in your list are definite? Would you consider it a close enough tie?? Hmmm...
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01-24-2007, 07:30 PM
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Headphoneus Supremus: Reviewerus Prolificus
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Join Date: Apr 2005
Location: Chicagoland
Posts: 11,439
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Quote:
Originally Posted by Morph201
So, #3 and #4 in your list are definite? Would you consider it a close enough tie?? Hmmm...
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They are indeed very close, and of course, slightly different. From the Headphonia amp on up, the amps were good enough that I could live with any of them happily. They all produced that "WOW that sounds great" feeling consistantly.
Below that, the amps for me were missing enough that I wasn't impressed enough to say I would be completely satisfied over the long haul.
__________________
PLEASE NOTE: Due to the volume of PM's I have been receiving in connection with my reviews, I no longer have the time to answer PM's from people with zero posts. Please read head-fi first before asking questions.
Team GO-U-NORTHWESTERN
Pics: Main Home Rig; Bedside Rig; Office Rig; Portable Rig;
Headphones: JVC HP-DX1000, HA-RX900; Headphile Deep Cup Darth Beyers VXD3,VXD4; Beyerdynamic DT990/600 (Manufaktur) DT770/600 (Manufaktur), DT880/600 Balanced (Manufaktur); HiFi-Man HE-2 Planar Magnetic; Sennheiser PXC-350; Shure SRH840
Home amps: Ray Samuels Audio Stealth (Mullard ECC32/CV4003); Decware Zen CSP-2 (Amperex BB 6DJ8/Sophia Princess 274B); Darkvoice 337 (GEC 6AS7G's/Tung-Sol mesh plate 6SJ7GTs); Wheatfield Audio HA-2 (Mullard ECC32/GEC 6AS7G/GEC U52); Ming-Da MC84-C 07 (Mullard CV4004/EL84/EM87); Audiotailor Jade (GEC 6AS7G/Sylvania 5751); J. Sound Lab Headphone (Mullard 12AT7); Audio-GD Phoenix; Musical Paradise MP-301 (Ken-Rad 6V6GT/Mullard 6AU6)
Portable Amps: Ray Samuels Audio P-51 Mustang; Decware ZenHead; Qables iQube
Sources: Denon DP59L table + Clearaudio Maestro Wood / VPI Scoutmaster + Benz Micro Wood L2 > Audio Electronics PH-1 DJH Phono Preamp; Music Hall 25.2 DAC; Denon DVD-5900;Red Wine Audio iMod iPod (Apple Lossless) & ALO VCap dock; Sony SCD-555ES SACD player
Loudspeaker system: Krell KAV250 Preamp>Sunfire Signature II Power amp > B&W Nautilus 800 Signatures + Velodyne FSR-1500/Martin Logan Descent
Tube testers: B&K Dyna-quick 650 & Dyna-Jet 606
Head-fi feedback
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01-24-2007, 09:45 PM
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Headphoneus Supremus
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Join Date: Jan 2007
Location: The Netherlands
Posts: 1,956
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I just got a Porta Corda MkIII-USB in the mail today. But it is not on this list.
Great reviews though. I really liked reading them. Maybe you can try to get people to send you portable amps for free just to test them.
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