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Hi all,
I've not got my Hermes variant yet, but would like to ask if anyone plans on using this device in the car for example; with the need to charge AND have audio out going to the car speakers.
Since there is only one connector for both charging and audio, is there some sort of 'Y' cable that 'separates' the two connections?
Thanks.
Brodit has an adapter with just charging feature:
http://www.brodit.com/productinformation.jsp?anr=971690
I have just written an email to them if they could put an audio out cable as well. I will update if I get any information.
esackbauer said:
Brodit has an adapter with just charging feature:
http://www.brodit.com/productinformation.jsp?anr=971690
I have just written an email to them if they could put an audio out cable as well. I will update if I get any information.
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Click to collapse
Yes, I remember seeing that one...
I would have thought more people may have wanted such an adapter- but obviously not. This is something I would use in my car all the time.
Hi Guys,
Have you considered the 'parrot' car phone kit options? They come in a variety of options, basically each is a Bluetooth car kit, that bonds with your device,transfers the contacts, mutes your cars radio, and pumps telephone calls through the car speakers also, it is in every way a fully working car kit for the Xda range.
I am biased as I retail and install them, but every customer i do installs for, they absoultey love them, as they also bond with upto 5 devices so other phones can be used as well, ie a works phone,
http://www.parrot.biz/united_kingdom/products/index.php?id=advanced
Drop me a line if you need any help ok,
Thanks
Bryson
bryson said:
Hi Guys,
To view and buy all Xda Brodit cradles and proclips, visit my site www.dsldevelopments.com
Click to expand...
Click to collapse
You should really fix your site to work with Firefox. It gives the error
Code:
Windows Media Player Plug-in Dynamic Library
The plug-in performed an illegal operation. You are strongly advised to restart Firefox
with Firefox 1.5.0.6 with Noscript 1.1.4.1
Well I think it may be your fault because I've never seen the error before and it is reproduceable.
bryson said:
Hi Guys,
Have you considered the 'parrot' car phone kit options? They come in a variety of options, basically each is a Bluetooth car kit, that bonds with your device,transfers the contacts, mutes your cars radio, and pumps telephone calls through the car speakers also, it is in every way a fully working car kit for the Xda range.
I am biased as I retail and install them, but every customer i do installs for, they absoultey love them, as they also bond with upto 5 devices so other phones can be used as well, ie a works phone,
http://www.parrot.biz/united_kingdom/products/index.php?id=advanced
Drop me a line if you need any help ok,
Thanks
Bryson
Click to expand...
Click to collapse
Would these parrot kits route the [musical] audio from my device to the car speakers then? I dont really need a BT carkit since I always have my personal BT handsfree on. My main requirements are those as listed in my original post.
Thanks Ill pass on the notes to the web guy, i use firefox and IE and works fine, is it the How it Works video?
No, it wont route music through your car, not that I have found yet,
You'd need it to support A2DP to play music too. As far as I know there's no headphone support only headset. At least it's only headset on mine.
The Parrot kits and the TyTn
To Bryson:
I have a CK 3000 that has worked fine with all of my phones. However, according to a different thread there seems unfortunately to be a problem with the Tytn and some (all?) of the Parrot kits.
Hi,
Ive yet to test parrot gear with a tytn / hermes etc - nhave you been over to the parrot forums to see if anyone has posted regarding this issue there?
Sorry i cant be of more help,
Bryson!
My parrot works sweelty with my Tytn and my Strtrk. I have the CK3000 unit too.
Y cable wanted!
I want a Y cable too!
Split into audio out, mic in, charge.
Preferably in a brodit carholder!
I'm sure someone can make this, now the phone is sold in Japan, lot's of japanese will want to use their own headsets, so I hope they will invent some nice cables
Im also looking for this same adaptor, so I can charge the device in the car while the adioo output can be used for satnav.
Anyone know of such an adaptor ? (Y cable)
I posted on the Wiki that a Y cable is soon to be available from Expansys. http://www.expansys.com/product.asp?code=140425.
grayhaze said:
I posted on the Wiki that a Y cable is soon to be available from Expansys. http://www.expansys.com/product.asp?code=140425.
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Click to collapse
Ah nice one, I knew this would be something people would want. But why HTC couldn't integrate this on the device in the first place still baffles me!
This is only my humble opinion.
When I first knew that the TyTn, followed by the next coming other HTC's PPCs (Trinity. Artemis), would not have the regular audio port anymore (Regardless the size, 2.5 mm or 3.5 mm), I was thinking they must be really stupid by taking that away. Since my first PPC, I have been always plug the audio/sound to my car stereo for MP3 and phone calls.
Then I tried to think about the logic, why would they take it away, they must have reasons, being such a high tech company. The most logical reason I can think of, they might want to design a good car kit /desktop cradle for it. Thus, by combining the audio port and the USB sync/charging port, they can create a cradle/car kit that would only have one connector to the PPC, instead of two connections/jacks: the USB and the audio pin. That might be a good idea, same idea like the earlier versions of the PPC, like Wallaby that had the serial connector that can be used for synching, charging, GPS, and audio input/output as well, all in the same connector.
But looking at the connector they made, the one posted above in the expansys, I'm kind of LOL really. 2 USB output, one for power, one for audio? Ha ha ha..
They /any third party, should have design a car cradle and a desktop cradle that not only have a regular USB for sync/power, but also just map out also the audio output to a regular 3.5 mm normal audio connection. And that cradle will be really useful and I would think many ppl will buy it. And for a plus side, just add a GPS module in the same car cradle unit, than its perfect solution.
Just my humble opinion...
Yes, I agree with the above post, what we now need is for someone to design both a desktop and car cradle, where it would have the 11pin, to which one would dock the device and the 5 & 6 pin on the underside.
This adapter is helpful, but it would be more helpful if accepted the standard 2.5/3.5mm plugs and power. I mean, come on, who's going to be listening in their car with headphones?
goestoeleven said:
This adapter is helpful, but it would be more helpful if accepted the standard 2.5/3.5mm plugs and power. I mean, come on, who's going to be listening in their car with headphones?
Click to expand...
Click to collapse
Yes good point. As it is, it would mean having to use this adapter to split the audio/charging and then use yet another adapter to convert the mini usb to 2.5/3.5 (if there is such as thing, seeing as the connection now would be the standard USB and not the 'square ended' one).
sh500 said:
goestoeleven said:
This adapter is helpful, but it would be more helpful if accepted the standard 2.5/3.5mm plugs and power. I mean, come on, who's going to be listening in their car with headphones?
Click to expand...
Click to collapse
Yes good point. As it is, it would mean having to use this adapter to split the audio/charging and then use yet another adapter to convert the mini usb to 2.5/3.5 (if there is such as thing, seeing as the connection now would be the standard USB and not the 'square ended' one).
Click to expand...
Click to collapse
That means we'll also need an USB A<->B adaptor.... Hmmmmmm.......
Anyone have a solution for this? I'd like to be able to play MP3's through my car stereo (via FM transmitter), as well as have it plugged into my car lighter to keep it charged.
I figure I can buy the audio adapter and plug it into a generic FM transmitter. I could also buy a boxwave Versacharger to charge it. But I can't do both at the same time b/c they both use the mini USB.
In any event, this proprietary crap sucks.
The only option I'm aware of:
http://www.mobileplanet.com/p.aspx?i=140425
yes, this is the UNIC option.. because:
a) HTC Proprietary connector: it's VERY DIFFICULT to find this type of mini-usb connector
b) Stereo headphones provided with hermes DOESN't have cables to charge the pda
Expensive option... get a bluetooth headset with 3.5mm input to connect to your FM transmitter ... and say bye bye to wired music.. almost..
sickchilly said:
The only option I'm aware of:
http://www.mobileplanet.com/p.aspx?i=140425
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Click to collapse
Excellent! Exactly what I was looking for....
new2city said:
Expensive option... get a bluetooth headset with 3.5mm input to connect to your FM transmitter ... and say bye bye to wired music.. almost..
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Click to collapse
Heheh... I actually thought of that. I think I'll go with the cheaper option
Here's how I did it:
http://forum.xda-developers.com/showpost.php?p=1078942&postcount=26
Has anyone managed to not only get the sound going through their speakers, but have their stereo mute on incoming call?
I'm not sure this is possible. I imagine your average phone has a pin it sets closed or high or something. The hermes doesn't seem to..
URPREY: Does the adaptor give you one standard mini usb for charging then split the 'special' audio pins to the other standard mini usb? Did you then just adapt a mini usb cable to hook into the line level inputs of your stereo?
icemantwilight said:
URPREY: Does the adaptor give you one standard mini usb for charging then split the 'special' audio pins to the other standard mini usb? Did you then just adapt a mini usb cable to hook into the line level inputs of your stereo?
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Click to collapse
It gives me one mini USB for charging, and a port exactly like that on the hermes for the audio/headset portion. I used a usb to 3.5mm adapter from mobileplanet.com to give me the 3.5mm audio out.
URPREY said:
It gives me one mini USB for charging, and a port exactly like that on the hermes for the audio/headset portion. I used a usb to 3.5mm adapter from mobileplanet.com to give me the 3.5mm audio out.
Click to expand...
Click to collapse
Yep, sorry, didn't see the extra adapter. That's a shame. It makes the very expensive first plug poor value for money.
If they come out with an adapter that turns it into mini USB and 3.5mm I'll go for it.. otherwise..
2 other q's:
1) With the first adapter, can you then use ANY usb car charger (ie does it bridge the NC pin to ground?) or do you then need your car charger to do that
2) What triggers 'headphone' detection? Is it the first adapter, the stereo adapter or is it actually plugging speakers into the stereo adapter?
This information would be extremely helpful, thank you!
icemantwilight said:
1) With the first adapter, can you then use ANY usb car charger (ie does it bridge the NC pin to ground?) or do you then need your car charger to do that
2) What triggers 'headphone' detection? Is it the first adapter, the stereo adapter or is it actually plugging speakers into the stereo adapter?
This information would be extremely helpful, thank you!
Click to expand...
Click to collapse
I can use any car charger, but the other ones I have don't provide enough power to consistently cause the 8525 to recognize the charger (and thus they don't always charge).
I don't know the answer to your second question. I'd be happy to check it out for you tomorrow when it's light outside again
URPREY said:
I can use any car charger, but the other ones I have don't provide enough power to consistently cause the 8525 to recognize the charger (and thus they don't always charge).
I don't know the answer to your second question. I'd be happy to check it out for you tomorrow when it's light outside again
Click to expand...
Click to collapse
Cheers for that. By not consistently recognize you mean it detects it the first time you plug it in then not anymore? If so that sounds like what I've found too.. it's due to the 'spare' pin 4 (or 2 or B depending what diagram you're looking at) not being grounded. The fact it detects it once per reset seems to be a bug.
icemantwilight said:
Cheers for that. By not consistently recognize you mean it detects it the first time you plug it in then not anymore?
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Click to collapse
Correct. The car charger that came with my device holder works perfectly and consistently charges my phone every time I plug it in, so I've always use that one.
URPREY said:
I don't know the answer to your second question. I'd be happy to check it out for you tomorrow when it's light outside again
Click to expand...
Click to collapse
Had a chance to look at this?
icemantwilight said:
Had a chance to look at this?
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Click to collapse
Sorry - yes. With just the audio adapter hooked up, the sound continues to come out of the rear speaker. When I plug in the headphones, the sound switches to the headphones. Hope that helps.
URPREY said:
Sorry - yes. With just the audio adapter hooked up, the sound continues to come out of the rear speaker. When I plug in the headphones, the sound switches to the headphones. Hope that helps.
Click to expand...
Click to collapse
Yep thanks. From this I can work out from the pin outs that have been worked out that the tytn detects headphones (and thus shuts off the back speaker) by testing impedance/capacitance or something on the speaker out cables.
Since there are no official cradles for the tytn I'm looking at knocking up a solution like yours, charge in the car and gps nav through the stereo (was hoping for auto stereo mute on call but that's a pipe dream) and doing it without the 2 expensive adapters and car charger my jasjam didn't have.
I've gathered a bit of info about the usb connection from various sites and forum topics. Maybe I should create a/add to the hermes usb port page in the wiki, if anyone but me is interested..
I hope the tytn Y cable is NEEDED, because there isn't a male "minu usb" jack like the one on the hermes in commerce. Cutting original headphones has no results because you can't charge it.
I have thought to buy tytn y cable, open it, and if there is some space inside, to add a 2.5mm - 3.5mm (depends on the free space) jack
So the Y adapter has 3 outputs: to charge, headset & jack.
If no space is avaiable, i cut my headphones and plug it from y cable to my stereo (also with mic included).
Another thing, to detect ORIGINAL CHARGER must be connected B & A pins, as described in THIS url comments
I agree with wiki page
SkizZO said:
Another thing, to detect ORIGINAL CHARGER must be connected B & A pins, as described in THIS url comments
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Ah yeah, I'm Iceman, I wrote that
Based mainly on comments in this thread, some other posts and some jiggery pokery with a multimeter and checking pinouts.
icemantwilight said:
Has anyone managed to not only get the sound going through their speakers, but have their stereo mute on incoming call?
Parrot makes a BT car kit that connects into all factory stereos to use the speakers to play the phone or mp3 through the car stereo speakers. Obviously the mic is a separate item, but incoming calls (or listing to mp3s from your BT phone) do mute the car stereo during the call.
several kits work, but I have Parrot CK3000 Evolution Bluetooth, Hands-Free Car Kit which came with specific harnesses for my car make and model. The other one is a bit flashier here:
http://www.abtelectronics.com/scripts/site/site_product.php3?source=froogle&id=24115
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Click to collapse
icemantwilight said:
Since there are no official cradles for the tytn I'm looking at knocking up a solution like yours, charge in the car and gps nav through the stereo (was hoping for auto stereo mute on call but that's a pipe dream) and doing it without the 2 expensive adapters and car charger my jasjam didn't have.
Click to expand...
Click to collapse
Auto stereo mute works fine if you use WMP or even with TCPMP if you uncheck the "play music in background" option
Guys,
I bought a cradle from ebay (leeonline) because I cannot get a 4 in 1 adaptor from HTC. I tried using the vga-out (17 inch CRT Monitor), rca video out (our Television Set), Brandless USB hub, Generic/standard USB Keyboard and Generic/standard USB Mouse on it all at the same time. Everything works.
Now, I really no longer bring my laptop to work. My athena is all I need for Word Processing, Spreadsheets etc. There are quirks though. Sometimes, the mouse stops working or the athena hangs. (It may be the amount of programs installed.) Then again, It is still faster to boot than my laptop. The other downside is that even with the cradle plugged to the adaptor, It will still consume energy from the battery of the unit.
What I have done to my athena may not be new to most people but I would like to hear from other people what attachments or modifications they have done to make their athena more useful and powerful. In this way, we can all benefit from these ideas. Thanks!
Thanks!
yetdy said:
Guys,
I bought a cradle from ebay (leeonline) because I cannot get a 4 in 1 adaptor from HTC. I tried using the vga-out (17 inch CRT Monitor), rca video out (our Television Set), Brandless USB hub, Generic/standard USB Keyboard and Generic/standard USB Mouse on it all at the same time. Everything works.
Now, I really no longer bring my laptop to work. My athena is all I need for Word Processing, Spreadsheets etc. There are quirks though. Sometimes, the mouse stops working or the athena hangs. (It may be the amount of programs installed.) Then again, It is still faster to boot than my laptop. The other downside is that even with the cradle plugged to the adaptor, It will still consume energy from the battery of the unit.
What I have done to my athena may not be new to most people but I would like to hear from other people what attachments or modifications they have done to make their athena more useful and powerful. In this way, we can all benefit from these ideas. Thanks!
Thanks!
Click to expand...
Click to collapse
I used to do that, but the novelty wore off eventually. Now i just bring in a mini notebook. It's easier than carrying loads of bits about and connecting things to monitors (though that option is still there if necessary).
Pretty cool though if you like your gadgets.
Leoni is correct, however he can always leave the other stuff connected to the cradle and use it sorta like a docking station, but you would need a second cradle for the home TV. I'm glad this thread started because I myself was considering getting one for my TV. However, what should I do about the audio coming from my device (will I still be able to connect audio to my AV receiver)? As far as the 4 in 1 cable I would be able to get to the audio jack on the Athena however the down side is that not all USB flash drives would be supported with the 4 in 1 cable. Yetdy can you tell me how you work around getting audio streamed?
I think there are a few ways to stream audio.
#1 S-Video if I'm not mistaken is supposed to stream audio to your TV.
#2 Audio Jack to RCA Audio converters connected directly to the TV or amplifier would also help assumming you are using the 4-in 1 adaptor. Cradle cannot help you out with this option.
#3 Of course there is bluetooth connection which is what I am going to use. Got a bluetooth transmitter and receiver from ebay but is currently busted (bad seller). Another is to get a BT that has a changeable earphone/buds. Change the earphone to an audio jack to RCA Audio jack and follow #2.
Hope this helps.
yes and no
yetdy said:
I think there are a few ways to stream audio.
#1 S-Video if I'm not mistaken is supposed to stream audio to your TV.
****You are mistaken, S-video is video only (the pins are luminance, chroma, ground and something else I can't remember off the top of my head) ****
#2 Audio Jack to RCA Audio converters connected directly to the TV or amplifier would also help assumming you are using the 4-in 1 adaptor. Cradle cannot help you out with this option.
****if it is anything like the one I got from ebay then no, as it covers up the headphones out port from the athena but does not replicate it on the back ! the athena also carries audio out from the same USB connector that you charge it from (this is why the socket on the athena is an unusual/different shape compared to your plug on USB charger) if they had replicated this port propely on the dock then you could have got audio out that way, but the dock connector for that is also wrong (standard USB shaped socket, not the odd one from the athena) ****
#3 Of course there is bluetooth connection which is what I am going to use. Got a bluetooth transmitter and receiver from ebay but is currently busted (bad seller). Another is to get a BT that has a changeable earphone/buds. Change the earphone to an audio jack to RCA Audio jack and follow #2.
****it is feasible to have the athena transmit stereo bluetooth to a nearby device !****
Hope this helps.
Click to expand...
Click to collapse
just my 2 pence worth
If you want to play audio on your home theatre speaker, you could also consider the option of plugging an FM transmitterinto the headphone jack, then use your FM receiver to play through your theatre speaker.
That was how I used to play my music in the car, through the car's srereo speakers.
eaglesteve said:
If you want to play audio on your home theatre speaker, you could also consider the option of plugging an FM transmitterinto the headphone jack, then use your FM receiver to play through your theatre speaker.
That was how I used to play my music in the car, through the car's srereo speakers.
Click to expand...
Click to collapse
wont work if the Athena is in the ebay dock/cradle, as it covers up the audio out port, but does not replicate it.
Ice coffee,
Maybe you can share some other options here. You may have other ideas that may be useful to us. I just got my athena last month and cradle last week so I cannot really say with authority what it can and what it cannot do. If you can help us out in maximizing the athena with its cradle, many will appreciate it.
None of the video outputs from the 4-in-1 carry audio, the only options are BT a2dp or the headphones jack. Seems a bit long-winded to me though - I'm sure there are less fiddly mods out there. I just used to use the magnetic keyboard as a stand, slipped a BT keyboard over the top of it and the 4-in-1 for usb hub etc. This left a free audio jack to use as I wished. Seems like the docking station is more of a hindrance than a help.
HTC Advantage
Docking station
Keyboard
Mouse
Hifi Bluetooth A2DP adaptor
USB Hub....
I think my EEE pc is a more convenient device on the whole than the above setup would've been if i'd carried all that with me I wouldn't have had any space to fit my work stuff!
I came accross another docking station for $119.00 USD that has the audio option on the side along with 2 standard USB ports instead of 1. I think it's a bit too pricey, due to the fact that on flebay they do have a2dp stereo bluetooth adapters for like $50 USD. Besides with that and your bluetooth headsets it might still be possible to answer a incoming phone call on your bt headset without having to hear the audio coming from your A/V receiver (considering you left the phone on). Leoni, both options have their own drawback (no powering source with the 4 in 1 cable for all USB storage devices and the inaccessable headphone jack when using the docking station). But anyway I'm going to order the 4 in 1 cable too and see which one works best for me on a day to day use.
as I said the only simple option is to use bluetooth and as tootalk2000 pointed out you can get adaptors on ebay for £25 ish, I suppose the other more complicated option would be to, take your cradle apart and replace the USB connector into the phone with this,
http://cgi.ebay.co.uk/2in1-Audio-US...oryZ3728QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
and then take the other end of this apart and make it fit in your cradle, it would actually be quite easy to do as there is a lot of space in the cradle.
ice_coffee said:
as I said the only simple option is to use bluetooth and as tootalk2000 pointed out you can get adaptors on ebay for £25 ish, I suppose the other more complicated option would be to, take your cradle apart and replace the USB connector into the phone with this,
http://cgi.ebay.co.uk/2in1-Audio-US...oryZ3728QQssPageNameZWDVWQQrdZ1QQcmdZViewItem
and then take the other end of this apart and make it fit in your cradle, it would actually be quite easy to do as there is a lot of space in the cradle.
Click to expand...
Click to collapse
Awwwww shux, someone just gave me some experimenting to go do. I'm ordering one of those jacks today, and hopefully it will come around the same time as cradle. I'll just super glue it to the back portion of the cradle and plug it in externally. Due to the fact that the USB port is still on there you would still be able to sync even when the ear phone jack is still in use.
tootallk2000 said:
Awwwww shux, someone just gave me some experimenting to go do. I'm ordering one of those jacks today, and hopefully it will come around the same time as cradle. I'll just super glue it to the back portion of the cradle and plug it in externally. Due to the fact that the USB port is still on there you would still be able to sync even when the ear phone jack is still in use.
Click to expand...
Click to collapse
lol my thoughts exactly.
Hi,
after a long year, I finally will get my HTC HD.
accessories are on the way, too:
Sennheiser CX 95
sandisk 16 gb sdhc
Black Silicone Cover Case + Film
Handsfree Remote Control for HTC Touch
I will post my review of these things later when I get it. It would be nice if someone can comment on my selection.
I am interested, did the handsfree remote work?
I guess it will arrive this week. At least from the ebay page, the seller said it's a remote control that does volume up/down, forward/backward, answer/hang up...
Hope it works
the stock headset will do play, fwd, bck, answer and hang up, just not volume, so a simple volume control should be no problem to incorporate, therefore should work.
Does the add specifically state it is for HD and is it mini USB or 3.5mm jack?
http://ewwt.net/Photo/11527.jpg
The seller says it works with HD and there is a 3.5mm connection for ear-plugs. This is a good combination with cx 95 style, since the wire is very short.
I should have done more research on the usb remote control
obviously, it doesn't work with HD.
what the heck is wrong with HD develop team? with bother to put a ext-usb with out audio output?
The Touch HD does have audio output on the extUSB port. Maybe on different pins though than your wired remote uses?
casefan7 said:
The Touch HD does have audio output on the extUSB port. Maybe on different pins though than your wired remote uses?
Click to expand...
Click to collapse
Not it doesn't. The extusb has pins for audio but they are simple not connected!
The ebay seller I mentioned before also made wrong description. Shall I spend 5 euro to send it back so that I can get $6 refund (not the $12 I paid coz shipping cost is non-refundable)? no, I just keep it and maybe send to someone who has a diamond and give the seller a negative feedback.
You are right, I wasn't properly informed. Since I read an other thread about video-out on the Touch HD, I thought that next to the video signal, also the audio signal was transfered via the extUSB. Now I understand that all audio goes throught the 3.5mm audio jack at the top.
Isn't there any way to solder those pins on the extUSB to the internal audio connectors? This way everyone could use usb headphones and usb wired remotes.
I have searched without any luck for a stereo dock that doesnt use the headphone jack. I have a logitech for my old iphone that u just set the phone in it and use the remote. Has anyone come across one for the galaxy s2 yet?
I believe there's one made by Philips which is available at Best Buy.
http://www.bestbuy.com/site/Philips...87&skuId=3044077&st=philips android&cp=1&lp=3
http://www.bestbuy.com/site/Philips...93&skuId=3021696&st=philips android&cp=1&lp=4
http://www.bestbuy.com/site/Philips...28&skuId=3044095&st=philips android&cp=1&lp=5
thanks,
I found this one too AS851 (Cant link yet). Comes with a remote and is 30 watts. They say you cant stream music thru the micro usb, but then how does the unit send audio and video to a HDMI cable, so I would think its possible. shrug
runtohell121 said:
I believe there's one made by Philips which is available at Best Buy.
http://www.bestbuy.com/site/Philips...87&skuId=3044077&st=philips android&cp=1&lp=3
http://www.bestbuy.com/site/Philips...93&skuId=3021696&st=philips android&cp=1&lp=4
http://www.bestbuy.com/site/Philips...28&skuId=3044095&st=philips android&cp=1&lp=5
Click to expand...
Click to collapse
All of those docks use Bluetooth to stream the audio. From what I know the USB port on the bottom doesn't have the ability to natively send audio out of the pins. I would love to have a simple dock too for this phone that would let audio out without having to jack in on the top of the phone, but it's just not designed that way.
I used to have an ATT "Fuze" (touch pro) - used to have to carry a dongle everywhere with me to plug in headphones. I'm much happier that I don't need a dongle, but it does suck to have to plug in 2 things in the car to get audio and charge at the same time.
You might want to take a look at this:
http://forum.xda-developers.com/showthread.php?t=1321491