I have a couple of amps, I've gotten from 41Hz.com
Cheap and huge sound for the price
But would like building something in the same league but with USB connectivity
No, not at all, you can put it where I think!
Only if it was really cheap, say $50
Only if it was cheap, about $100
This is the thing I was born for, send me one now!
This sounds like something I would be very interested in. It'd be a great way to get up and running without having the research amps and soundcards vs DAC's etc....
I'd make the suggestion of having line-level outputs for possible later upgrade options?
Also maybe 6 channel option for those who would prefer to run components on separate channels?
I don't know if those are easy to implement, but those are what would make it a must-have for me.
I think this is a fantastic idea and will get a lot of people to take the plunge. it'll save them money by not having to run a dedicated amp and all the cabling that is needed for it. It'll be a nice space saving alternative as well and just be a simple plug and play. This is the final hurdle that i think deters most people from going car pc. I think it would be foolish not to make this device. you dont need audiophile grade here, this should be marketed for the masses. people that want the computer but dont care about pure sq. On suggestion that i have is to try to integrate a 'pre out' into this design. this would allow those who want to add a sub to the setup and easy hook up. all the processing can be done on the sub's amp... just a pure full range signal with decent voltage (2v?)
I wonder if it is possible to make two versions?? One version has the USB amp and one version in which you have to use a soundcard and it is only a straight amp??
Also you have to remember, that the amp has GOT to be tiny, because many people don't have much space in the dash board and also can't take up and slots. Maybe customizing a double din unit, with screen infront and amp behind with maybe a small fan to keep both cooled might be a good optional extra??
As to USB bandwisth issues, USB 2.0 is pretty much the standard these days, if anyone actually has a usb 1.1 motherboard, than you most likely need to upgrade....the processor will be crap!! There's USB 3.0 in the works at the moment!!
The USB cable length is an issue, using both sound solutions.
It will be as small as possible!
Using USB 1.1 has the advantage of being less sensitive to interference and cable issues, even on 2.0 systems, that's why I mentioned it (also, there are p4 laptops that only have 1.1 ports !)
Using P4's is irresposible, Pentium 4's are based on the netburst core, which are notorious for their power consumption.
That said, USB 1.1 is fine for pretty much upto and including 5.1 sound.
One more point to note, doing a google search, the only USB speakers I could find, was stereo speakers, is this because sound over USB does not allow more than two channels??
You might find this interesting.
As for the power amps, there are plenty of good single chip design out there.
If you can make this module for under $50 then Im sure alot would be interested. Have you decided on the USB-AUDIO chipset + power amps? People would be interested to see the spec for sure, even if its one of those cheap drop in $50 jobby.
This post was directed to Joachim
We are looking into different amps and usb chipsets, simplicity is key here also... once we know what we'll use, I'll make some info available.
Probably gonna be a car-radio amp as these are perfect for this application.
I think this is a great idea! People want simple and small and easy to use. I can see definite value in something like this because I see people asking all the time for a simple amp solution and don't want to do the HU or amp. With all the new cheap efficient amp designs out there, I think this is totally feasible. I personally wouldn't buy one because it wouldn't fit my needs, but anyone who wants a simple soultion should be drooling over this.
I'd say keep it within $50-100 probably $75-100 would be a good place to shoot.
I imagine as with your other projects, it would come preassembled? No building required right?