On Saturday, September 23, 2017 at 11:02:01 AM UTC-4, micky wrote:
I'm thinking of installing a Gromaudio device that, if your car radio
has a CD changer input jack, allows for USB input, AUX input from a
cellphone, and for another $50 Bluetooth use of the cellphone through
the car speakers and an add-on microphone (in addition to the first
$150).

The most important feature for me is the USB input.

Do any of you know anything good or bad about Grom audio? Do any of you
know a competitor you would recommend (instead?)?

For example, Crutchfield sells a similar device that is only $70 for
everything (except the microphone and I can't even figure out how to
plug a microphone in).

A microphone would go into the aux input.



But assuming a microphone would work, would you
assume the one that sells for $200 is better than the one that sells for
70?




I'd assume that it's available from China for $10, including shipping.
Possibly for much less. Seriously, you're thinking of spending $150
for something that just turns aux input on a car to a USB input?
And $50 more for bluetooth? Any company I'd do business with would
have put all that in the first device and for an order of magnitude
less than the $200.



I've read as many reviews as I can find, but I wanted your opinions, and
I wanted to let you know such things are available. I never heard of
them before 4 days ago.

Their webpages will tell you if your car factory radio is compatible.
They say they even retain the use of SWC, steering wheel controls.

What exactly is being done through this USB or bluetooth connection
into the aux input on a car radio? The only connection there is audio,
so it's only sound and it would have nothing to do with
being compatible with any particular car beyond the car having an aux
audio jack, no?

Also, I assume there is some player of some kind in this device that
then allows one to insert a USB Flash Drive with music on it and play
it? A link would be helpful.




There are one or two other companies that sell devices that have
everything but the USB input,

The device you were talking about had:

"allows for USB input, AUX input from a cellphone, and for
another $50 Bluetooth "

By subtraction that would mean that the other device is essentially
a bluetooth adaptor.




and I found something on ebay that had
everything and was only $18. At that price it's worth trying it just in
case it works, but based on the pictures, I don't think I could find one
that fit my particular jack. Hmm. Now it says "Only 4 available" and
the price has gone up to $20.

At least it's now getting in the right price
range. I don't understand why there is a problem with the audio jack
size, aren't they all the same? Even if different, there would only
be maybe two and you'd think they would support both. My pair of old
Sony headphones from the 70s fits into my new cellphone 3.5 mm jack.
If they are different, get an adapter.

Ebay link?