YeahThatGuy,
It depends on the age of the documentation you are reading. Originally at least one wired unit was required. The BRIDGE was used in situations where it would be inconvenient to wire a player. The competition dumped on SONOS, accusing SONOS of lying about being “wireless”. The competition forgot to mention that the SONOS approach was very reliable compared to the not so reliable competition’s approach. At one point SONOS was giving away BRIDGE’s, but the competition still dumped on SONOS. Eventually, SONOS gave in and enabled WiFI. It was a cheap trick for SONOS and it instantly deflated the competition.
Anyway, most of the regulars here prefer the SONOS wireless approach (SonosNet) rather than WiFi. SonosNet requires one or more wired components and the system will automatically switch to SonosNet after a wired unit is detected.
In your case there are two, common potential issues. First, the BRIDGE power supply could be causing issues. At this point I assume that this is the case until proven otherwise. If you have a voltmeter, the BRIDGE power supply should measure slightly over 5V. Less than this there will be intermittent, very hard to describe issues. A very simple test is to power down BRIDGE and wire another unit. As others have suggested, you don’t need BRIDGE for SonosNet (wire something else), it’s just a convenience.
Second, if you want to use WiFi rather than SonosNet, I suggest that you power down BRIDGE and temporarily wire another unit. While the other unit is wired, insert the correct WiFi credentials. Now you can disconnect the network cable and use WiFi. But, as I’ve said, I prefer SonosNet. If BRIDGE is EOL (End Of Life) you can replace it with BOOST.
If this does not solve your issues, we’ll need more information about your SONOS system and your network. We need model numbers and layout.