I have a question,
I run Futaba brand controllers and receivers, ...very happy with this brand and have used them going back to the '80's.
Something occurred to me and I don't have an answer. Hoping someone can help me out.

I am looking for a receiver for my Futaba 4PX.
I have several at home, in various cars and haven't really noticed a difference between the various receiver models.
The various receiver models range in price from $37 to $80 ...yet I have no idea what the differences are. I run about 3 different models ...and they all seem the same to me.

For examle,
this one is $37
https://www.amainhobbies.com/futaba-...tl7603/p208943

this model is $49
https://www.amainhobbies.com/futaba-...tl7617/p297142

and this one is $59
https://www.amainhobbies.com/futaba-...tl7680/p261221


...and there are about 5 more models of various prices...

they will all work with my 4PX, yet other than the price I can not determine why one is more $$ or if one is better/worse than another?
Please enlighten me!
thanks. ...

If you read the descriptions

R203GF is a 3 channel with battery max voltage of 7.4

R2004GF is a 4 channel with battery max voltage of 7.4

R304SB is a 4 channel with S.bus2 and telemetry and a max voltage of 7.4

each model offers something different at different price points.

On the site of Futaba-RC you can find a list of which receivers will work with what transmitter. But I believe all will work.

Here's a compatibility chart from Futaba:

https://www.futabarc.com/receivers/f...ss-compat.html

For the 4PX, only models 604FS, 614FS,FF,FF-E will work.

Those are the FASST models, in another list the FHSS models are listed, the 2004gf is not listed as compatible, the 203, 204 and 304 models are

thanks guys,
okay ...so there is no difference in "speed/responsiveness" then?
For my 4PX I an go w/ at least 5 or more models ...the lowest priced being $37 (I don't need the telemetry feature or extra channels).

Gotcha.

I heard the fastest 4PX receiver is the TFHSS while not using telemetry function. There is a chart out there where somebody did a latency test. Basically the cheaper R203GF rx was much slower than the R304SB. For years I ran the slower RX because it was cheap. Didnt think much of it then. I have since sold all my R203GF.

I upgraded to a 7PX recently and went all SR compatible receivers and servos for the ultimate response. In my F1 and USGT car it was tough to tell over my 4PX/r304sb combo. But in my 1/12 pan car I felt a small difference. I think the differences are most apparent on a tight and technical carpet track. Large asphalt tracks, maybe not as much. Again this is only my opinion with limited testing.