The meaning of 15 and 25 is Output(W) of the Unit(Speaker). The more output is high, the more volume(dB) is high. SEN15 model is 108dB and SEN25 model is 115dB.
Please process as below for additional inquiry and purchsing
A. Online Purchasing Inquiry
1. Firstly check the information of the Products through “Website > Products > Products Group“.
2. Please put inquiry through “Website > Customer Support > Question and Reply“.
B. Offline Purchasing Inquiry
Please contact after checking of person in charge through “Website > Purchase > Purchasing from Abroad“.
Thank you for your inquiry.