Battling iPhone's GSM Buzz 4: Solved!

Thu, 02/14/2008 - 17:11 — Jonathan Curtin

I hope you readers aren't as tired of this topic as Mrs. Grant is. A word to the wise—make sure you are in good stead with your bedfellows before auditioning audio equipment obsessively for a month. Oh, and try not to write on a blog on Valentine's day unless your partner is really cool about it.

For a refresher course, here are the Battling iPhone's GSM Buzz articles in order:

But there is such exciting news! I received my Sonic Impact 5065 Gen 2 T-Amp with Power Supply today! In this, all the credit goes to "Actual Audio Engineer," whose comments proved to be not only snarkily entertaining reading, but actually useful and informative to boot.

But let's back up a bit, shall we? About a week ago, my Sonic Impact T-Amp already ordered, who else but our very own Cleve Nettles, sends me an IM with this link:

http://www.dlo.com/Products/PortSpeakers_iPhone_Prod.tpl

Of course, after all this effort, I had to buy them. These, truly, are the holy grail of portable iPhone speakers. At $50, the sound is about what you'd expect, with speaker cones about 2" in diameter. But that is a fine baseline for any Mac user who either (a) doesn't have the built-in iMac speakers, or (b) likes to play her iPhone out loud on the go (I know you can technically play the iPhone without headphones, but not for any kind of musical enjoyment).

My few beefs were that the audio cord is not very long, and barely reached my G5's audio port from the top of the desk. Secondly, the sticky rubber casing of the amp tends to pick up dust, so don't expect the kind of aesthetics you see in the pics. Thirdly, if you want to plug the thing into anything other than an iPhone, you need to use the included adaptor, or it will hum like crazy—that's more of a warning than a beef, for those of you that don't happen to notice the rather small adaptor while unpacking.

But (and this is a gigantic BUT) the most precious thing about these DLO speakers is that there is NO TRACE of the dreaded GSM buzz. This is also personally elating for me to report, because they weigh in at HALF the budget I'd originally alotted myself to solve this problem, which they capably do. For 90% of you readers, these will suffice if you are looking for desktop/portable speakers to play nice with iPhone.

And then there's the other 10%. The insufferably uncompromising audiophiles and those who are too obsessive-compulsive not to listen to them. Oh, yes, I was in deep. Actual Audio Engineer recommended purchasing Paradigm Atom Bookshelf Monitor Speakers on eBay for anything under $200. But lo, I discovered that there was a Paradigm dealer not one block from my workplace, and paid them several visits last week to hear the Atoms. Sure, they're great. For $270 plus tax, they'd better be. But I was not prepared to shell out that kind of dough without knowing for sure that they would work with the Sonic Impact T-Amp. And by work, I mean produce great sound without getting the migraine-inducing bup-bup-ba-dup-bup-ba-dup-dup interference courtesy of my iPhone connecting with the local cell tower.

Now let's get this straight. There are probably dozens of choices in the 4/8 ohm bookshelf speaker category that have sufficient sensitivity (around 90dB) to be powered by the Sonic Impact T-Amp. But Actual Audio Engineer's comment that these and the NHT Super Ones were the best-ever somehow stuck in my craw. So, when the Sonic Impact T-Amp arrived at my desk, I took my lunch break at Sound City. They were good enough to set up my amp with a single Paradigm v5 speaker to test against GSM buzz and give me a little clue as to the sound quality I could expect.

The one speaker had incredible volume and richness connected to the Sonic Impact T-Amp. All from a mere 10 watts at 8 ohms (it's rated at 15 watts/channel at 4 ohms). I dialed my home number on the iphone and placed it directly in front of both the speaker and on top of the amp. Zero GSM buzz. I know Actual Audio Engineer advocated purchasing these on eBay, but the eBay stuff I found was v3 and v4—the updated v5s were sitting right in front of me and I knew I would simply keep obsessing until I owned them, so why not get it over with?

There are many reviews at Amazon of the Sonic Impact T-Amp and you can find much more capable reviews of the Paradigm Atom V.5 Bookshelf Monitors online than what I can render here. For the purposes of this piece, the point is that if you are desperate to get rid of GSM buzz from your iPhone, it's all about a properly-shielded amplifier. My Paradigm Atoms are connected to my amp with regular 16-gague speaker wire, so I can attest that there's no need to spend a bunch of cash on Monster Cables. I also want to point out that I purchased the non-shielded versions of the Paradigm Atoms (magnetic shielding is a $20 upgrade). I learned at Sound City that the shielding in speakers is only to curb interference with glass-tube televisions. Since my display is an LCD, there is no need to magnetically shield the speakers, and there are no repurcussions on the GSM buzz front. I'm sure there are other amps that are properly-shielded, and there will probably be a slew of comments about people's favorite speakers. That's fine. I just know that this particular combo works for me. Your mileage may vary.

Seriously, though, if all you need is a better set of 2.0 speakers than your Mac tower can provide, go with the DLOs for $50. I think I'll keep mine in the basement for when I'm lifting weights or doing laundry. I just sort of made this issue my personal mission (much to my wife's chagrin) and I needed to go all the way. If you are afflicted with the same kind of personality, I hope this series of articles has saved you some time.

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Comments

That's great news :D

That's great news :D

I had a question on the DLO

I had a question on the DLO iPhone Speakers that maybe you could answer, since they don't really say on their website. Do they only have one input, or can you connect them to both your iPhone and computer at the same time? Thanks!

There's only one input.

There's only one input.

Uhmm... Isn't this the same

Uhmm... Isn't this the same set that Philips makes?
http://www.consumer.philips.com/consumer/nl/nl/consumer/cc/_productid_SB...

They look identical, but I

They look identical, but I don't read Dutch. Could be they made some slight tweaks (Im thinking the 3.5mm jack for iPhone) and released the product in the US under the DLO brand. I got no clue if the amp is shielded in the same way.

If people get a chance, you

If people get a chance, you need to read Actual Audio Engineer's comments.  While being very knowledgeable in the electronics field, etc;  he is also very entertaining in the description of the kiddie hacks. 

If you read this Actual Audio Engineer, I raise a beer to those who know what the hell they are talking about......

Thanks, Chadwick. This has

Thanks, Chadwick. This has saved a lot of time and research. My wife thanks you too :)

Quick Question...  Which

Quick Question... 

Which speakers should I get?  :D

 

This time around you did not go into much detail with the audio quality of these speakers vs the Berringer, and M-Audio monitors.  Are the Paradigm's worth the extra money in audio quality?  Also, was the volume good enough when you hooked up two speakers to the amp instead of one?  Do you notice a big diff in volume between the atoms and the powered m-audio dx4's?

 

thanks!

I don't really see the point

I don't really see the point of comparing the Paradigms to the M-Audios, the Klipsch, or the Behringers. There's no comparison. The Paradigms are passive (you need an amp to power them) and the others are powered. The Paradigms don't get GSM buzz (when paired with a shielded amp) and the others do.

In terms of Audio quality, I will defer to those in the community who know better.  I linked to a review in the post that I thought was good. As I understand it, in the audiophile world, these are considered the best bang for your buck. My personal experience with them has been excellent. The best imaging, detail and low-end of anything I've tried in a bookshelf speaker so far. The Sonic Impact amp can power them to very high volumes on 10 watts per channel because of their high (90dB) efficiency—less energy is wasted as heat. There are other speakers, like the Pioneer S-HF21-LR Bookshelf Speakers that are compatible with the SI t-amp, but their sensitivity is lower (80db) and that will, in principle, translate into lower volume overall. I never tried them, but at Amazon they're on sale for $31.05, which is a little more than a tenth of what I paid for the Paradigms. I'm sure there are diminishing returns as you move up the echelons, and how much you are willing to pay is, as always, entirely up to you.

I'd recommend buying the SI T-Amp and then you should go around to various dealers and ask to test it on their speakers. I'd bet that some storefront shops would be game (Sound City was), and maybe even a couple of Radioshacks if it's not busy. Circuit City and Best Buy will probably tell you to take a hike.

Good luck.

Thank you for your insight

Thank you for your insight and suggestions. To clarify, I am not overly concerned with the GSM buzz. Although I do experience it with my JBL 2.1 Creature II speakers I can greatly mitigate hearing the buzz by tossing my phone on the shelf behind my desk chair. I am seriously considering getting the speakers you have suggested, but that decision was in large part based off my displeasure with the sound from the JBL's. Your impressions of the sound from various higher end speakers was really interesting. My problem with the audiophile sites is that the discussions and reviews can get pedantic - I much rather find out from an regular user like myself what their impressions are of the sound quality. I was not too concerned with passive vs driven.. just which you like most. That brings me to my question about which speaker from all the ones you have tried you enjoy the most. It sounds like the Atoms are you're pick hands down! :)

I also was concerned about the ability of the small amp (that runs off AA batteries) would have been loud enough - again - it does not seem like thats an issue for you.

One last question, do you notice a big decrease in base vs a 2.1 system? Is a separate subwoofer even necessary with these speakers?

Thanks again for your comparison! I think I am going to start looking for those Atom's online. Keep up the great work on the site!!

cheers.

Speaker ratings without

Speaker ratings without consideration for GSM buzz is out of the scope of this investigation. I would rank the powered speakers I tried like this:

  1. M-Audio Studio Pro 3 For good detail and volume and excellent midrange
  2. Behringer MS40 for tons of volume, but a rougher, less refined sound
  3. Klipsch Groove PM20 2.0 Did not meet expectations. Sound was thin and piercing on the high frequencies, hollow in the midrange and virtually nonexistent below. I might have had a bad pair. 
  4. Logitech R-10 Whaddya want for $17?

All of these, however, failed the GSM buzz test. Listening to the Atoms at the moment I am impressed with the level of detail at low volume, which none of the powered speakers could remotely match. This is really evident in dynamic music, such as Radiohead's In Rainbows, which I am listening to now. You can hear the layers of forte, mezzo-forte, mezzo-piano, and piano all in one effortless symphony. The sound is so natural, one forgets about the equipment, and is free to get lost in the music.

As far as low-end is concerned, this is also out of scope, as I set out only to research 2.0 systems. A sub will always provide extra bass and its absence will be felt if you're used to one. My amp does not have a dedicated sub output channel, so don't expect that. For music listening, the Atoms are more than adequate on the low end. I am now playing MDMA by Love 666, one of the more punishing bass drum recordings in my collection, and I hear no distortion up to the limit, but neither do I feel it thumping in my chest. Gamers, movie buffs, and anyone who really has a bass fetish will miss a sub. But I watch my movies on my 5.1 system in the living room, and I'm not a gamer, so the Atoms are perfect.

I should also make clear that I have not yet tested the SI T-amp with batteries. It also hooks up to a regular outlet, and if I want to travel with a system, I'll reach for the DLOs I mentioned, which are infinitely more portable than the atoms + SI T-amp.

Once again, I urge you to purchase the SI T-amp and test it with as many speakers as you can find in person to see what is appropriate for you. We'd love to hear your impressions of what you tested in the comments.

How can I tell what speakers

How can I tell what speakers are compatible with the SI T-amp? What do I need to look for? I am a total speaker newb but was looking for something cheaper than the Paradigm Atoms, and didn't know how to tell which ones would work.

For instance I was looking at these Sony SS-B3000 speakers on Amazon, good reviews and only $100.

http://www.amazon.com/Sony-SS-B3000-Bookshelf-Speakers-Woofer/dp/B000OG6...

Would I be looking to see if they are 8 ohms? The sensitivity is 88dB, is that enough or does it have to be the 90?

Thanks for any tips you can provide!

Loved the articles by the way. Best solution I have found so far. The DLO speakers look way too puny for my tastes and I really don't want to wrap my $400 phone in tin foil.

They should work if rated at

They should work if rated at 8 ohms, but try to see if you can test them out in person. If you can't, Amazon is pretty great about returns.

Worked!

 Just wanted to let you know that I just received my Sonic Impact T-Amp and Sony SS-B3000 speakers, hooked them up and it works great! I can turn them up loud enough that my wife complains and they sound terrific, and absolutely no iPhone interference! Thank you so much for your articles! I'm very happy with your recommendation. :)

Philips Portable iPhone Speaker

Hello Chadwick

Nice review. iWorld Australia is the exclusive distributor for DLO-Philips products in the territories of Australia and New Zealand.

This speaker is made by Philips and since Philips has taken over DLO it has now been renamed Philips.

I have found a good instructional video on the use of the Philips iPhone portable speaker.

Go to this link:

http://www.iworldaustralia.com.au/index.cfm/page/productdetail/id/71/Por...

Regards

Gordon
www.iworldaustralia.com.au

reply

I have been with Sprint for almost 4 years now. Have had data access since day 1. Have had EV-DO for over a year. And there is no way in hell I am going to leave Sprint for any stupid phone! Cingular by far has the worst network, and they charge too much for everything.

stopping the gsm buzzing

Go to www.stopthebuzzin.com and see a product that elminates this gsm buzz. Too simple. You have to see this.

replay

The iPhone is indeed cool, but AT&T/Cingular is NOT. It is a terrible network and they have about the worst customer service in the galaxy. When somebody finally figures out how to unlock the iPhone (which is apparently going to be difficult), then I’ll buy one.

glyco

I had a question on the DLO iPhone Speakers that maybe you could answer, since they don't really say on their website. Do they only have one input, or can you connect them to both your iPhone and computer at the same time? Thanks!

regards,
glyco

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