ǒ The U52 is an upgrade for the U51 system. Compared with the U51, the U52 has 30 adjustable frequency groups and you can switch frequency within 1 meter away from the unit. It combines quality sound, simple setup, and frequency flexibility that allows up to 30 systems to be used at the same time ( To achieve best result, please do not use more than 15 units simultaneously). On the other side, the U71 uses the IR syn function and you will need to adjust frequency in front of the U71. However, the U71 do have a more stable circuitry with the IR function.
+Is this an upgrade for the U71 system? Both of them are adjustable frequency. What’s the difference?
+Is this rack mountable?
ǒ After discussion in the engineering department, PTU-52 cannot be mountable on the rack temporarily,
+Which are the compatible devices for this system?
ǒ The PTU-52 works well with devices such as outdoor speaker, street stereo speaker, PA speaker system, power amplifier, karaoke speaker, etc. If you have trouble setting it up, you can send us pictures / models of the speakers at firstname.lastname@example.org so that we can send you instructions on how to connect them together.