http://www.head-fi.org/forums/ Discussion of portable headphone amps. en Fri, 20 Nov 2009 22:13:36 GMT vBulletin 60 http://www.head-fi.org/forums/images/misc/rss.jpg http://www.head-fi.org/forums/ http://www.head-fi.org/forums/f105/mini-audio-mad-07-ibasso-d2-d2-456478/ Fri, 20 Nov 2009 09:04:13 GMT Mini audio MAD 07 = iBasso D2 or D2+ ? I am going to buy MAD07 in asia and i am wondering is it the D2 or D2+ one also any differences between D2... Mini audio MAD 07 = iBasso D2 or D2+ ?
I am going to buy MAD07 in asia
and i am wondering is it the D2 or D2+ one
also any differences between D2 and D2+ except the line out?:confused_face_2:
Thank you~! ]]> Portable Headphone Amps alexlammm2 http://www.head-fi.org/forums/f105/mini-audio-mad-07-ibasso-d2-d2-456478/ http://www.head-fi.org/forums/f105/decent-rechargeables-uk-anywhere-456436/ Fri, 20 Nov 2009 02:25:07 GMT Hi,

Been a long time since I posted (or even browsed here).

I'm looking for some rechargeable batteries for my SR-71A. I've been using Ultralife Lithium Batteries for... well ever since I can remember but I'm having trouble finding them cheap any more. You can sometimes pick them up on eBay but the chances are getting smaller & smaller all the time so I've come to the conclusion that I need myslef some rechargeables to keep me plugged in.

I did a search on the forums to try & find some info on what people were recommending nowadays & only came up with batteries available mainly in USA which is no good to me.

Could someone recommend me a good set that I would be able to find closer to home & a charger to go with them? I'd really appreciate it.

Cheers. ]]> Portable Headphone Amps Nuwidol http://www.head-fi.org/forums/f105/decent-rechargeables-uk-anywhere-456436/ http://www.head-fi.org/forums/f105/cmoy-good-cable-question-456372/ Thu, 19 Nov 2009 20:27:09 GMT im looking at this cmoy amp Super Slim Metal cMOY Headphone Amp (Silver Ver.) - eBay (item 250502776350 end time Nov-21-09 07:58:37 PST)... im looking at this cmoy amp

Super Slim Metal cMOY Headphone Amp (Silver Ver.) - eBay (item 250502776350 end time Nov-21-09 07:58:37 PST)

i was thinking of getting, are all cmoy amps the same? i assumed they were, i actually want to get this one because the color matches my ipod nano. the rechargable batteries is a plus.

and what is the cable that connects the lineout to the audio in to the amp called? i need to be able to search on ebay for it but dunno what is it called. how do i tell if one cable is better than the other?

expxe ]]> Portable Headphone Amps expxe http://www.head-fi.org/forums/f105/cmoy-good-cable-question-456372/ http://www.head-fi.org/forums/f105/home-vs-portable-amp-newbie-456308/ Thu, 19 Nov 2009 14:37:23 GMT I don't know what options there might be for amps meant for a home system (Utilized from my integrated) vs. a portable one in my price range ($100 - 150). Used could be an option, but if I were buying new, what qualitative differences might I expect in amps that are portable vs. ones that will stay at home? Most of my listening would be at home, but a portable would allow for the occasional use out of the house. I have learned about many good budget portable amp options, but what are some good home system amps in the price range, if any?

Jeff ]]> Portable Headphone Amps AnalogJ http://www.head-fi.org/forums/f105/home-vs-portable-amp-newbie-456308/ http://www.head-fi.org/forums/f105/clip-phones-vs-clip-amp-phones-456300/ Thu, 19 Nov 2009 12:44:39 GMT Westone UM3X vs: Clip+ > iBasso D4 > Westone UM3X And, if...]]> Hi all, just wondering what you think the difference here would be:

Clip+ > Westone UM3X

vs:

Clip+ > iBasso D4 > Westone UM3X

And, if that makes sense, what is the general rule-of-thumb advice on what volume setting to leave the Clip+ set to (ie, if the head out then passes to another amp).

Thanks... ]]> Portable Headphone Amps turnstyle http://www.head-fi.org/forums/f105/clip-phones-vs-clip-amp-phones-456300/ http://www.head-fi.org/forums/f105/mods-please-delete-456175/ Wed, 18 Nov 2009 17:44:49 GMT sorry wrong forum! mods please delete sorry wrong forum! mods please delete ]]> Portable Headphone Amps baka1969 http://www.head-fi.org/forums/f105/mods-please-delete-456175/ http://www.head-fi.org/forums/f105/ibasso-d10-questions-456168/ Wed, 18 Nov 2009 16:54:39 GMT I am awaiting delivery of a D10. My first headphone amp....an exciting time:beerchug:. Two questions have arisen: Can the D10 handle Pandora... I am awaiting delivery of a D10. My first headphone amp....an exciting time:beerchug:.

Two questions have arisen:

Can the D10 handle Pandora One sound from a computer? It is streamed at 192kbs. Don't know the bit level. I know that 192 isn't audiophile quality but I enjoy the variety of Pandora programming.

Can someone point me to a resource that tells one how to roll op amps in the D10 and how to order op amp Topkits by HiFlight described in many threads?

Thanks much,

Ray ]]> Portable Headphone Amps rayguy http://www.head-fi.org/forums/f105/ibasso-d10-questions-456168/ http://www.head-fi.org/forums/f105/linearossa-456134/ Wed, 18 Nov 2009 10:29:02 GMT has anyone tried these new amps ? they're a Rudistor's 'cheaper line'.
I guess the W3 is meant to be a competitor to iBasso D10.

Linearossa by RudiStor-Pacific


ciao
daniele ]]> Portable Headphone Amps daniele_g http://www.head-fi.org/forums/f105/linearossa-456134/ http://www.head-fi.org/forums/f105/underamping-just-sound-signature-456123/ Wed, 18 Nov 2009 07:39:12 GMT So, I ran the line out of my CDP through a JDS CMoyBB and also a Compass. The HP were Sennheiser PX100. The bass was much less tight with the... So, I ran the line out of my CDP through a JDS CMoyBB and also a Compass. The HP were Sennheiser PX100.

The bass was much less tight with the CMoy, though the quantity was pretty much the same. This (the first part at least) is what I would have expected due to less powerful amplification.

However, the CMoy sounded brighter, if less refined, overall. For example, higher-pitched percussion sounded snappier, less softened.

I wonder whether in reality this is a thinness and harshness due to under-amplification. It's certainly not as smooth or easy to listen to over longer periods, and the PX100 do have a warm signature, don't they? This would mean that the CMoy can't really drive the PX100 even at low volumes.

So, can under-amping have this brightening effect?

The Compass was set to neutral/normal, the CMoy opamp is OPA2227P.

TIA. ]]> Portable Headphone Amps anoobis http://www.head-fi.org/forums/f105/underamping-just-sound-signature-456123/ http://www.head-fi.org/forums/f105/pico-amp-dac-dac-only-456118/ Wed, 18 Nov 2009 06:26:26 GMT Has anyone compared if it makes much or any difference? 1. Pico amp/dac as dac only (as preamp) to an home/desktop amp 2. Pico dac only to an amp.... Has anyone compared if it makes much or any difference?
1. Pico amp/dac as dac only (as preamp) to an home/desktop amp
2. Pico dac only to an amp.

The reason is, I have a pico amp/dac and use it as dac only through the headphone out with volume at low gain all the way turned up. Is it worth getting a pico dac only. It's the pico dac line out going to make a significant difference?

thank you ]]> Portable Headphone Amps sling5s http://www.head-fi.org/forums/f105/pico-amp-dac-dac-only-456118/ http://www.head-fi.org/forums/f105/ibasso-d4-question-dac-chips-456061/ Tue, 17 Nov 2009 22:13:56 GMT I saw ibasso D4 using "Dual Wolfson WM8740 DAC Chip + TI PCM2706", but PCM2706 is a USB chip with DAC inside. I checked spec for PCM2706 and could find the digital pin on it. How these three chips configured?

BTW, is D4 has socket for OPA rolling? ]]> Portable Headphone Amps zentiao http://www.head-fi.org/forums/f105/ibasso-d4-question-dac-chips-456061/ http://www.head-fi.org/forums/f105/i-need-charging-cable-ibasso-t4-456052/ Tue, 17 Nov 2009 21:35:22 GMT Is there a cell phone or PDA charger that will work? USB cable would be preferred, but an AC charger is ok. I want it today, from local best buy or... Is there a cell phone or PDA charger that will work? USB cable would be preferred, but an AC charger is ok. I want it today, from local best buy or cell phone store. ]]> Portable Headphone Amps Sardonyx http://www.head-fi.org/forums/f105/i-need-charging-cable-ibasso-t4-456052/ http://www.head-fi.org/forums/f105/question-ibasso-d2-vs-d4-456005/ Tue, 17 Nov 2009 15:21:54 GMT Hi,

Sorry am decently new to amps so I'm not sure if this will be a stupid question.

I am using the UM3X IEMs and I use them with my MacBook when I am home, and with my iPhone 3G when I am on the move.

Am thinking of getting a DAC/AMP, mainly to be used at home with the MacBook. My intention is to get more treble and soundstage out of the UM3X.

The D4 seems to have pretty good reviews, but considering the chip is exactly the same as the D2+ (well 2 of it, but still...), I am wondering, will the D2+ and D4 will perform comparably? What is the added benefit of the dual DAC? The built-in rechargeable battery of the D2+ seems better on the move, and the D2+ is cheaper anyway.

Other than the D2+ and D4, are there any reasonably priced DAC/AMP that I should consider?

On a side note, is the LOD cable from iBasso any good?

Thanks! ]]> Portable Headphone Amps supern0va http://www.head-fi.org/forums/f105/question-ibasso-d2-vs-d4-456005/ http://www.head-fi.org/forums/f105/lisa-attenuator-455908/ Mon, 16 Nov 2009 22:35:59 GMT As many know, the Lisa III is considered one of the best, if not the best, portable/transportable amps. I cenrtainlly consider it the best. One... As many know, the Lisa III is considered one of the best, if not the best, portable/transportable amps. I cenrtainlly consider it the best. One "problem" is it was not designed nor intended to be used with ultra-sensitive IEMs. I think I've found the "ultimate" solution!

First, I've owned my Lisa III for almot 2 years. During this time I've had many of the newer, top level amps (Pico, IQube, P-51, SR-71 etc.), but the Lisa still bests them all. I listen exclusively with IEMs - UE11's - combined with an iMod and outboard caps. I also use my rig portably, all the time, at the gym, 2 to 3 hours per day. Yeah, this setup is big, bulky and heavy, but it sounds so good I mostly don't care.

Now the Lisa with IEMs is barely able to get much past 8:00 on the volume dial before it gets too loud. Minute twitches of the volume dial produce noticeable results, meaning a very steady hand is required in adjusting the levels. I initially contacted Brad at Triad and asked his advice. He directed me to Head-Fier "qusp" (Jeremy), said he was working with Triad and could help me out.

Well, help he did! The solution is large, not cheap, but the results are quite surprising.

With the attenuator in (it's also a quarter inch-to mini adapter) the Lisa III volume dial now runs around 10:00 to 11:00. It's far less sensitive to minute adjustments. I was not prepared for the sonic differences. In particular, the bass has been drastically modified. Before, the Lisa III and UE11 combo could be, and often was, quite bass heavy. This produced a warm, musically satisfying sound, but not quite true to the recording. Many songs I wished I could turn trhe bass down a notch or two.

No longer. Now I find I actually add bass to some songs, a wonderful feature. The Lisa seems like it has really opened up, detail is better, it sounds quicker, there in an added degree of clarity. As always, the treble is simply phenomenal, the best of any amp I've ever heard, by far.

Props to Jeremy, he's been great to deal with and does great work. If you own a Lisa, or are considering one, you owe it to yourself to check this thing out! ]]> Portable Headphone Amps FreeBlues http://www.head-fi.org/forums/f105/lisa-attenuator-455908/ http://www.head-fi.org/forums/f105/little-dot-mki-jack-issue-shorting-crackling-455903/ Mon, 16 Nov 2009 21:53:41 GMT I've owned a Little Dot MKI+ for about 8 months now. It's a great sounding amp for the money, especially after adding the LT1364 op-amp.

The issue I'm having is a very brief "short" or loss of sound that I have isolated both the input and output 3.5mm jacks. It's very brief, 1/100 of a sec -- sort of like a "crackle." I'm certain it's an issue with the jacks. Either the positive or negative terminal inside the jack is shorting or losing its connection. It happens when you move the amp and either the LOD or headphone cable gets pressed in a certain direction.

Has anyone else experienced this with the MKI or MKI+? ]]> Portable Headphone Amps SoulSyde http://www.head-fi.org/forums/f105/little-dot-mki-jack-issue-shorting-crackling-455903/