Yes. Amazon has a number of Bluetooth receivers. I purchased one and wired it to the amp with a 1/8" mini headphone jack to L-R RCA plug adapter. It works great. I have a separate toggle under the dash to turn the amp on. Bluetooth receiver plugs into a USB port under the dash.
I made this panel from .030" alu sheet. Heater control, phone chargers for me and the wife, and red button for garage door. Spare USB for standalone GPS.
You can't see any of this sitting in the seat.
I got an "el Cheapo" Anker one from Amazon for $20 USD. It's wired to the switched 12V out of my radio that normally turns another amp on, so it comes on with the radio and goes "Bidly-Boop!" in the speakers when the key is turned, telling me it and the AUX mode is on. It remembers what it's paired to (my phone) and I just stream from there. It has an adhesive patch on the back so I stuck it to the side of the radio enclosure under the dash (you really can't see it easily).
While it technically works to make phone calls, too, the microphone on it is also over by the radio so it's hard for people to hear me while under way (lots of wind and engine noise), so I pull over if it's not a SPAM call and call them back.
@Stan Galat posted:I think @Joe Fortino had this done.
@Adrian R. Stan is correct I had Carey install an Out of Sight Audio system in my car when built. I have 2 speakers in the door and 2 in the footwells. I steam straight from my iPhone and have no issues. I was going for a clean look on the interior but still wanted my tunes. 
Thanks Joe fortino do u happen to know the brand of the devise because I also have speakers on the doors but I want something g that I don't have to use an amp with.
The brand is Out of Sight Audio http://www.outofsightaudio.com and I have the Mark 2 without an amp.
Here's a link to the receiver I use:
https://www.amazon.com/TaoTron...ps%2C159&sr=8-10
Mine is mounted on my shifter base right between the seats. It is almost invisible but easily reachable to skip, pause, and adjust volume WITHOUT taking your eyes off the road. You could even take a call, it works and people can hear you. But like Gordon, I pull over to make calls.
I have a retrosound with bluetooth, it works but honestly the wind noise essentially is a real issue and if your out at 70mph, the volume has to be loud enough for you to enjoy your music so when a call comes in you can jump out of your skin at the ring volume. I would say like Danny, that you need to pull over to really make a call.
I just use a JBL CHARGE 3 along with my phone in Bluetooth. It sounds great and I can take it anywhere. I attached a couple patches of velcro to the Charge 3 and just stick it on the nylon carpet on the center "hump" between the seats. The sound is right where you can hear it with the top down while on the Fwy. This way, no holes in the dash or under it and no speaker installation to deal with either ! Oh, I bought a red Charge 3 to match the red car too !............Bruce
@aircooled posted:I just use a JBL CHARGE 3 along with my phone in Bluetooth. It sounds great and I can take it anywhere. I attached a couple patches of velcro to the Charge 3 and just stick it on the nylon carpet on the center "hump" between the seats. The sound is right where you can hear it with the top down while on the Fwy. This way, no holes in the dash or under it and no speaker installation to deal with either ! Oh, I bought a red Charge 3 to match the red car too !............Bruce
I wouldn't want to get hit by a flying Charge LOL! Same reason I wouldn't install an extinguisher with velcro.
I used Polk 6.5" 2 way patio speakers under the dash, they are black and you can't see them. To remove is just two threaded holes each in the frame(This is fodder for your eventual Spyder).
Thanks Danny.....I don't even know what I will use in the Spyder yet. I'll just be happy to hear when it gets out of the suspension shop in June. I just returned from a 2 month break down in Baja Mex. and have been working on getting down to see Greg next week. I knew this project would take a while but actually doing the wait is harder than I thought................Bruce
Yeah, tell me about it. 
It might have been easier for you, Lane, if you, too, were waiting down in Baja.
Gordon......All wait and no play makes Bruce a dull boy ! Yes, Baja is a nice diversion. Especially at this time of year. While driving, on the way down there, I envisioned being in my Spyder speeding down that road as though I was in the "Transpeninsular Historica Race" ! Jeez ! ..........Will I ever grow up ? Probably NOT ! They really did drive over that very road and some of it is downright treacherous ! Blind corners, downhill curves, negative banking on outside curves ! Its fun to imagine how the drivers would negotiate some of that road............Bruce
