• Welcome to Jetboaters.net!

    We are delighted you have found your way to the best Jet Boaters Forum on the internet! Please consider Signing Up so that you can enjoy all the features and offers on the forum. We have members with boats from all the major manufacturers including Yamaha, Seadoo, Scarab and Chaparral. We don't email you SPAM, and the site is totally non-commercial. So what's to lose? IT IS FREE!

    Membership allows you to ask questions (no matter how mundane), meet up with other jet boaters, see full images (not just thumbnails), browse the member map and qualifies you for members only discounts offered by vendors who run specials for our members only! (It also gets rid of this banner!)

    free hit counter
  • JetBoaters.Net 2nd Annual SeaDoo Switch Group Buy Sponsored By JetBoatPilot Is Live Now. Save 25% Off Select SeaDoo Switch Gear through October 31st.

    Click Here to go to the Jetboatpilot Seadoo Group buy

    You can delete this notice with the "X" in the upper right>>>

Humming through speakers

Jim Robeson

Jetboaters Captain
Messages
1,293
Reaction score
817
Points
227
Location
Springfield, Missouri
Boat Make
Other
Year
2000
Boat Model
Other
Boat Length
34
Noticed the other day that when the cockpit fridge cycled on that I had a "humming" sound through the cabin speakers but not the speakers outside the cabin. That sound system is on a separate amp than the one in the cabin. I also tried a different switch on my 12 volt panel and it also caused the humming sound to come through the speakers. Does this sound more like a grounding thing and is there any easier way to discover what isn't grounded correctly??

Thanks!!
Jim
 
I have noticed a similar issue on my boat. I tried various noise isolators without success. The hum was being introduced through the audio source which at one time was a Bluetooth receiver then later a Raspberry Pi. My eventual solution was to use a Toslink optical audio cable to connect the source to the head unit https://jetboaters.net/threads/looking-for-a-12-volt-noise-supressor.2819/

I suspect that your issue is related to differing quality power supplies in the two amplifiers or differing amplification levels.
 
Thanks @Bruce .... someone else had recommended a ground loop isolator which I may try before too deep into this.
 
I agree with @Bruce. Could be the quality of the amp. If the amps are wired properly directly to the battery with large gauge wire I doubt that a ground loop isolator will make a difference. A noise filter might however make a difference.
 
@Jim Robeson are the two amps different brands or models?

Are they attached to the battery in a similar way?

Based on my experience I am doubtful that a ground loop isolator will do much.
 
@Jim Robeson are the two amps different brands or models?

Are they attached to the battery in a similar way?

Based on my experience I am doubtful that a ground loop isolator will do much.

Yes, two amps and I'm pretty sure they are two different models. I don't know how they are attached to the battery yet...haven't gotten that far. Hell, I'm still trying to figure out what is hooked to what and what switch works what gadget :confused:
 
Back
Top