Originally Posted by Audiophile75
It all sounds easy..... doesn’t it? First, like someone told you on the other forum your power supply is too small which could be starving for “input” power and cutting out. Your amp sees a different ohm load than what it wants so that too could be cutting out because it’s working too hard “working power”.
I’m no expert but let’s try to simplify.
1st. Your power supply - try less speakers or a bigger power supply. Maybe try without the sub.
2nd. Forget about the term “watts” for your speakers, you are just confusing yourself. Instead use “ohms” because this right now is more important. Your tweeters need to be wired to 8ohms and your mids to 8ohms. Use your ohm meter to get close to 8 “ohms” in a series parallel configuration (google it) because you described + to + and - to - earlier and that would put you down to 2ohms which is the wrong way to go. Hint: when using your meter it will be hard to get exactly 8, just get close.
3rd try excluding you sub from this circuit and creating its own. Maybe get a rca y-splitter and use both amps, one for you highs and mids (don’t use the low on the xo board) and another amp for your subs. You could buy an f-mod with a 350hz (around) low pass just to run your second amp and sub in a 4ohm but hopefully a 8ohm load by it’s self.
So, here is what I would do.
I assume you have both red and white (left and right) rca’s coming from your tv. Use red for one amp and white for the other. The first amp will only power one channel (one input) to the one crossover (mono) where you can power the high and mid, don’t use the sub. The other rca output to the new fmod (<350 hz) then to the other amp then to the sub.
Another option is because your amp has two channels you should get two new two way xo’s, one for right and one for left for stereo mode, but MAKE SURE that your speakers are again 8ohms because you will now be splitting them in half for “two” channels and then use a rca y-splitter to the other amp for the sub. That way the two channel amp, which has two channels can operate in stereo mode (left and right) and the third channel (coming from your y-splitter) can operate just the sub channel.
By no means will this be audiophile grade but I did enjoy instigating this conversation on further. This is something I did when I was 8 years old when my family members through stuff away, I though I could do something cool but in the end I just wasted a lot of time and energy. But I did enjoy the diy part.....
Thank you so much for your K.I.S.S. response. While some of it I had to look up, I understand what you are saying. Yes, I have the red and white RCA output from my T.V. as my source. I like the first option you suggested as it seems that I simply need to get a fmod and then install the second amp I have, simple enough and the most cost-effective way to try to resolve my issue. I have gone back and pulled everything out of the box and ohm checked every speaker in the box and the spares I chose not to use. If I want to keep it simple, not buy any more amps or crossovers, other than the fmod, and keep the enclosure I built, I am may have to buy new drivers with the correct specified ohms. Every speaker was either 3, 4, 6, or 7 ohms and any combo of speakers for the mids and highs will not get the 8 ohms. The sub is only a 3ohm sub so, there's that.
1) If I get the correct power supply, speakers and, everything is wired to 8ohm, is there still a need to split the signal and run the second amp and fmod?
2) From what I'm understanding, everything (in my simplistic non-theater grade soundbar) comes down to the ohms that the drivers, crossover, and amp are rated for. The specs for the amp read (1x220W single channel in parallel BTL(Vcc = 36 V, RL = 3Ω, THD: 10%), is this relevant for my kindergarten audio education? I'm assuming it's not because it hasn't really been touched on, but I want to make sure.