They were purchased simultaneously with the AIWA estm100. A comparison was made between them using an honor view20, on a musical piece that was played 4 times on each pair. My ears hurt from the terrible dull sound and excessively distorted highs they produce at any volume level. On the contrary, the aiwa, which are 1 euro cheaper, had a very clear sound, balanced frequencies, were comfortable, and clear at high volumes. Don't expect deep bass in this price range.

In conversation (two-minute calls were made), the image is exactly the same, with the pioneers confusing the speakers both with their low volume and their dullness. The aiwa is value for money. I was impressed for 9 euros. I will also try the more expensive model.