DSP 408 Issues
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Tourer
Joined: Jun 2022
Posts: 328
Likes: 214
From: Cypress
DSP 408 Issues
Equipment:
GTS radio, 8/2 flash
Hertz 4.900 amp, gains set with SMD DD1
DSP 408, updated firmware.
I ran the yellow/blk wires off 12g straight to the battery. Red remote is using the hot from the 12v fairing plug, blue turns on my amp. DSP set to REM as its the only one that will turn it on. NEW shielded RCAs going from DSP to amp. RCAs that came from the T harness that went to the amp are now feeding the DSP. Lo level input get a crazy static. Switch to high level input, minimal static but no music from either. I got the DSP new years back and finally wanted to be able to use it and it seems that is not going to happen. Ive tried connecting via BT as well as USB. Ive turned the mixer volume up for chanels 1-4. For now, Im done trying. Ive tried for 2 weeks to get this going. Still curious thaough what could have caused the issue.
Still waiting on my HDHU14+ to get back from Volunteer Audio then the GTS will get pulled
GTS radio, 8/2 flash
Hertz 4.900 amp, gains set with SMD DD1
DSP 408, updated firmware.
I ran the yellow/blk wires off 12g straight to the battery. Red remote is using the hot from the 12v fairing plug, blue turns on my amp. DSP set to REM as its the only one that will turn it on. NEW shielded RCAs going from DSP to amp. RCAs that came from the T harness that went to the amp are now feeding the DSP. Lo level input get a crazy static. Switch to high level input, minimal static but no music from either. I got the DSP new years back and finally wanted to be able to use it and it seems that is not going to happen. Ive tried connecting via BT as well as USB. Ive turned the mixer volume up for chanels 1-4. For now, Im done trying. Ive tried for 2 weeks to get this going. Still curious thaough what could have caused the issue.
Still waiting on my HDHU14+ to get back from Volunteer Audio then the GTS will get pulled
Last edited by SSG_B; Dec 12, 2025 at 11:00 AM.
Grand HDF Member
Joined: Sep 2017
Posts: 3,716
Likes: 919
From: Southern Virginia
Might be worth giving Dayton a call if you get audio with the GTS plugged straight into the amp. I know with some DSPs you won't get any sound through it at all until inputs are mapped to the correct outputs. My Arc DSPs have tripped me up like that before.
Cruiser
Joined: Sep 2025
Posts: 167
Likes: 55
From: New England, Maine
Check your ground. Run a new wire straight to the battery negative. That's the most common cause of DSP static. Also, the "hot from the 12v fairing plug" for remote might be dirty. Try a relay triggered by your amp's remote out instead.
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