[Lock]

I just purchased a Logic3 Universal Ipod Dock. All I wanted it for was convenience of remote control of my ipod. The SQ is actually very good, better than I would expect. The problem is it is poorly grounded, builds up static on the ipod case and introduces a High frequency Hiss!.

I have the dock connected to a set of powered speakers, so each has it's own mains lead

The dock uses a cheap external DC switching power supply. I'm pretty sure the hiss is from the power supply.

What are my options for sorting this?

As it is only a 9V source, I thought I could make a battery box and power the unit with 9v rechargable batteries would this remove any ground loop and hiss?

Advice would be great!

thanks

 

[infinitesymphony]

I think you're talking about transformer hum coming from the power adapter itself. I've experienced this high-frequency noise firsthand with an external hard drive adapter. You could run battery power, which would be great, or you could buy a better power adapter with similar specifications.

If you have low frequency ground loop hum, try plugging the dock into the same outlet / circuit as your speakers.

 

[Lock]

The battery power source works but didn't solve the problem the hiss must be from the internal attenuator/amp.

Be warned the Logic 3 is an ok dock and the remote is good, but it is not a totally clean signal source ..