iFinity Wireless Audio Transmitter/Receiver for Subwoofers and Surround Speakers

Bought one set for a remote subwoofer installation, used the mono port only, which is the left RCA terminal; worked perfectly. Really just basically plug and play. It is true, as other mention, that the little gray boxes look somewhat cheap, however, they are small and can be discretely placed out of sight. I didn't encounter any problems with latency (delay) or intermitting signal, it has been very steady, and, in my case, contrary to what other reviewers have said, I had no problem with these working without a line of sight. The units are light, easily attachable with Scotch's velcro-type fasteners, the transmitter under the shelf where my AVR sits and the receiver tucked behind the subwoofer with all sorts of "obstacles" in between them. I am ordering another one for my fourth subwoofer (2nd wireless). Onto of everything it is the least expensive solution available of this type and has no protruding antennae, still works like a charm. Some reviewers mention that it comes with cheap cables; they are not bad, plus, I didn't expect it to come with any RCA cables. Really, the only con (for me) is the super bright red status light, which in dark environments is quite noticeable. You can always place a piece of tape on top if it becomes a nuisance. Five stars for functionality regardless of the minor cons mentioned. Overall, great product, very happy with it.

As many other reviewers have indicated, this device works very well. Its easy to pair the transmitter and receiver, and the sound quality seems very good. I measured it down about one dB at 20KHz, and flat down to 7 Hz (I didn't look lower than that.) The receiver AC output voltage for each channel is an exact match for the transmitter input voltage. I thought the supplied RCA cables were fine -- maybe they've upgraded them after getting so many negative reviews. Based on all this I would give it 5 stars, but . . .The one problem is that the receiver output has a couple of volts DC on top of it, which looks like the result of operating with a single ended output device without a coupling capacitor to block DC. This is fine as long as your amplifier has a blocking capacitor at the input, but otherwise your amp will be dealing with a big DC input voltage and maybe even trying to output that voltage, which would push woofers to their limit, to say the least. For that flaw, only 4 stars!Follow-up 12-19-21 I've gone back and measured the output of this device again, based on some other reviews discussing possible limits to its maximum input and output signal voltages. Here's the thing, the maximum input voltage it can handle is 1.0 v rms. After that the output signal begins to clip. This could be a problem because many setups will use input voltages up to 2 volts or more. The distortion if you exceed the 1 volt input limit would be quite severe.Secondly, other reviews include discussions of the time delay this device puts into the system. I measured it and it is a big 31.3 msec between an input and an output signal. This could be a problem if you're trying to time align your woofer/subwoofer, or at least your AV receiver would have to be able to compensate for this large signal delay. For what its worth, the output signal is also inverted, although that probably hardly matters with a 31 msec delay!

Like many others I have bought cheaper transmitters and receivers to power my sub-woofer and have been deeply disappointed. The three problems have always been the lack of distance the signal would travel if interrupted by walls, the amount of distortion and hum on the speaker and the level of signal interruption when the signal was broken by someone walking in between the transmitter and receiver. These amazingly small devices, with no aerials, far exceed the performance of anything I have previously tried and are now successfully providing a clean, silent signal to my sub-woofer. They are more expensive than many other systems, I bought mine from America and had to buy power plug adaptors which saved £30 vs UK prices, but they actually work which in the end is all that counts. When it comes to syncing these couldn't be easier, you just turn them both on and they sync pretty much immediately, as long as they are in range, if you need to encourage them they have a small sync button. One word of caution, their range through walls, like all the systems I've tried, is pretty limited, not much more than 10m at best, but no doubt this improves dramatically with a line of sight signal.

I think it's really funny that the manufacturer claims effective distance of 200 ft. range line of sight and 50 ft. through walls or ceilings. I have these set up NINE FEET AWAY from each other, completely unobstructed line of sight and the sound cuts in and out like morse code. I cannot get more than 1-2 consecutive seconds of the subwoofer being engaged before it starts pitter-pattering. You get what you pay for, I guess. "The wireless transmission employs advanced adaptive frequency hopping. It avoids frequency channels occupied by other wireless devices and is highly robust against wireless interference" must be pulled from another product description because it does not apply to these. I have, at max, the TV app and the router on, or the Xbox and the router on at any given time and I cannot for the life of me get a steady signal. I can't possibly place these any closer. It's infuriating how inefficient the product is. Not even going try to contact the seller or Amazon, based on what other reviewers have said about the process. Chalking them up as a loss and tossing them in the random electronics/cable box in the garage. If I am ever in a place where they would be the ONLY wireless device in the vicinity, maybe I'll give them another shot. Ordering a second SVS sub and trying their SoundPath wireless transmitters. Save yourself the time and shell out a few more dollars for a different solution. I understand something like this is never going to be 100% perfect but the performance is laughable.