Here is my own personal opinion of the Blon BL03. This review also forms part of Episode 1 of Acho Reviews on YouTube in case anyone wants to watch someone ramble on in Spanish . BLON BL03 REVIEW. The Blon BL-03 are by no means a recent release, at least at the speed that Chinese IEMs are released. Hi there PAR fam. In this review, I'm checking out the BLON BL-03, an earphone with a carbon nanotube dynamic driver.This thing sounds seriously good for a budget earphone but you might need another cable to get the most performance out of it. Let's do this. This sample was provided for the purpose of an honest review. The detachable cable is made from 4 strands of anti-tension and anti-interference wire for the main wire. The 90° earplug design and 3.5mm gold plated plug make the cable long-lasting. The built-in microphone is also available for choosing. One-click operation is easy to use too. Specification. Product Name: BL-03 In-ear Earphone. Impedance: 32Ω.