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Amp for iPhone and maybe computer

post #1 of 37
Thread Starter 
Hey guys, first post here. I am pretty much a noob in this whole hi-fi audio territory. I recently just bought a set of SR225's and I am really happy with them (however, unfortunately everything else sound terrible to me now). Right now I am usually connecting to them either a iMac, MacBook Pro, or an iPhone. I have noticed that the quality seems a better on the computers than the iPhone, and I am guessing that this is because the phone just cannot power these things properly.

So I am guessing that I should be looking into portable amps. I really would like to find something that I can take back and forth to my labs at my university in my bag. I dont need to use it one the move, either, just while at a desk. I also prefer if it would be battery powered, but are the battery powered ones good enough to really push enough juice?

Thanks guys
post #2 of 37
You need a portable amp that has the DAC feature, this way you can connect it directly to your iMac and MacBook Pro, and yo our iPhone using a proper LOD( Line-out dock ). Thsi way you'll get better sound quality from either sources

Some options:

Corda 2Move
RSA Predator
Headamp Pico
iBasso D3 Python

Each one has their particular characteristcs, prices and "house sounds". You can do a quick search in this forum to find some reviews about them. It will help you decide among all of them.
Hope I've helped a bit.
post #3 of 37
Also Ibasso D2 Boa. It is not as good as D3 Python but it is $50ish cheaper. Whether the slight step up in sound is worth another $50 for those trying to save money, I have no idea.
post #4 of 37

Well...

I own a D3 and it is great, except you will get interference from the phone signals every once and a while and they are pretty strong...you can put your phone in airplane mode to avoid it or a really long LOD.

I would suggest an RSA Predator has a little more shielding than the D3, I think you would still get the issues but if you want to buy one amp...Id get the Predator.
post #5 of 37
I'm not an expert, but maybe the Total Bithead would fit your needs? It can connect via USB and serve as a DAC, or serve as an on-the-go battery powered amp.
post #6 of 37
Does anyone know how the shielding is on the NuForce Icon Mobile? I've been considering buying this amp/dac unit.
I would love to operate the amp via LOD on regular (non-airplane mode) without loud disturbances.
post #7 of 37
Welcome to Head-fi ..

and .. oh ... sorry about your wallet!
post #8 of 37
Quote:
Originally Posted by helmerkelps View Post
Does anyone know how the shielding is on the NuForce Icon Mobile? I've been considering buying this amp/dac unit.
I would love to operate the amp via LOD on regular (non-airplane mode) without loud disturbances.
http://www.head-fi.org/forums/f105/n...ssions-386019/

Just about any amp will have trouble with being 1-12" from the iPhone with the Radio on. To the point that I am more concerned with can I use the amp with my Macbook if the iPhone is within 3 feet of the amp!

The iPhone 3G headphone out sounds good enough that I have quit trying to use an amp with it, or if I use an amp I disable the radios. I can do that because I have my family on verizon family plan for voice, but mostly use the iPhone for data. Previously I used a Win Mobile PDA phone on Verizon for voice and data, and for $10-15 more/mo than my VZW data plan I get data and voice with the iphone, so I switched VZW to a normal flip phone. It wasn't clear to me just how bad the RFI problem was till recently (got the iphone 2 mo ago and did an iBasso D3 review on 11/1 and found the problem).

Verizon and sprint don't have this caustic noise generated by their phones, and I'm frankly surprised the FCC lets ATT stay in business with how the iPhone and my old ATT Sony 810i would irradiate all my audio electronics with crap.

Even my $500 pico is subject to iPhone RFI but only if the iphone is within 5-6" - right now with pandora playing through my Pico, I still occasionally hear the ATT GSM buzz with the pico 4" away at the end of my punnisher LOD.
post #9 of 37
Quote:
Originally Posted by HeadphoneAddict View Post
http://www.head-fi.org/forums/f105/n...ssions-386019/

Just about any amp will have trouble with being 1-12" from the iPhone with the Radio on. To the point that I am more concerned with can I use the amp with my Macbook if the iPhone is within 3 feet of the amp!

The iPhone 3G headphone out sounds good enough that I have quit trying to use an amp with it, or if I use an amp I disable the radios. I can do that because I have my family on verizon family plan for voice, but mostly use the iPhone for data. Previously I used a Win Mobile PDA phone on Verizon for voice and data, and for $10-15 more/mo than my VZW data plan I get data and voice with the iphone, so I switched VZW to a normal flip phone. It wasn't clear to me just how bad the RFI problem was till recently (got the iphone 2 mo ago and did an iBasso D3 review on 11/1 and found the problem).

Verizon and sprint don't have this caustic noise generated by their phones, and I'm frankly surprised the FCC lets ATT stay in business with how the iPhone and my old ATT Sony 810i would irradiate all my audio electronics with crap.

Even my $500 pico is subject to iPhone RFI but only if the iphone is within 5-6" - right now with pandora playing through my Pico, I still occasionally hear the ATT GSM buzz with the pico 4" away at the end of my punnisher LOD.
I'm so glad I'm finding this out before investing in am amp + LOD! My new Alessandro M1s are set to arrive next week and I was ready to splurge of the amp/connection setup to maximize their potential. I will sure hold off on this unless I revert to using my ipod again. I've become addicted to Pandora on my iphone. I guess growing up in the 70s with radio--it's still in my blood.
post #10 of 37
If you have any extra antistatic bags laying around - they might help:
Stop Cell Phone Speaker Buzz - Home

I've also seen references to folks having success using ferrite beads on the offending cables. I suspect that won't work if the interference is affecting components directly on a PCB.
post #11 of 37
The whole "iPhone making things near it buzz" really is a PITA. As soon as Verizon gets an iPhone I'm switching!
post #12 of 37
actually I find it to be fairly minimal with the pico. the only time I hear a ping is rarely while on the move, when the phone switches between 3G and 2G coverage. I can use the net, email everything without ANY noise whatsoever. perhaps your telcos over there produce more noise than they do here in OZ.
post #13 of 37
I did read one explanation that said that the buzz is worse in marginal coverage areas because the phone is allowed to use a higher power setting to maintain contact with the tower. I also think I recall reading that 3G is supposed to eliminate the buzz. Is that true? 3G in pretty rare in my area...
post #14 of 37
3G does not eliminate the buzz, but it does buzz less than my 1st gen iphone.
post #15 of 37
I live in an area where it switches from 3g to edge often.
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