Hi everyone,
I’m having a frustrating issue with my Pioneer DDJ-FLX4 and Pioneer DJ DM-40D speakers, and I’m hoping someone can help me figure out what’s causing it.
My setup:
Pioneer DDJ-FLX4
Pioneer DJ DM-40D active monitor speakers
Windows laptop running rekordbox
3.5 mm to dual RCA cable
The DM-40D has one active speaker (plugged into the mains) and one passive speaker connected to it via speaker wire.
The problem:
When I connect the speakers to the FLX4, only the passive speaker plays music. The active speaker is powered on but produces no music, just a little static.
I’m connecting the single 3.5 mm jack to the stereo-mini input on the active speaker, with the red and white RCA plugs connected to the FLX4’s Master Out sockets.
Here’s what I’ve tested so far:
Tested both speakers using my laptop: I connected the 3.5 mm end of the same cable to my laptop’s headphone jack and the red and white RCA plugs to the active speaker. Both speakers play audio normally.
Tested the RCA plugs individually with the laptop: Using only the red RCA plug, the passive speaker plays. Using only the white RCA plug, the active speaker plays. With both connected, both speakers play normally. This suggests both sides of the cable and both speaker channels work.
Swapped the red and white RCA plugs at the FLX4: The result stays the same — only the passive speaker plays.
Tested the FLX4 master outputs: When I connect the red RCA plug to either the red or white Master Out socket on the FLX4, I get sound through the passive speaker. When I use the white RCA plug, I don’t get sound. This makes me unsure whether the issue is with the controller’s output, the cable connection, or something else.
Checked rekordbox audio settings: The audio device is set to DDJ-FLX4. Master Output is set to DDJ-FLX4 Master, and Headphones Output is set to DDJ-FLX4 Phones.
Tested the FLX4 headphones output: My headphones work correctly through the controller, with sound in both ears.
My question:
Given that both speakers work with my laptop, the cable works with my laptop, and both FLX4 Master Out sockets produce sound when tested with the red RCA plug, why tf doesn’t it work when everything is connected normally?
Could this be a fault with the FLX4’s master output circuitry, a software/routing issue in rekordbox, or something else I’m overlooking?
I’d really appreciate any suggestions for a diagnostic test that would narrow this down. I’d prefer not to buy another cable or replace anything until I’ve identified the cause.
Thanks!