Congrats on your new speakers. Zu speakers offer great value for the money, are efficient, and have a sound that is amicable to many followers. When I auditioned, they just did not mesh with my own predilections on sound.
Blemishes aside, it will be interesting to see how your break in goes and how the sound improves.
What’s wrong with the cabinet? All I see is knots within the veneer which is normal for wood. From what you stated, I am interpreting that you said your Undertone had the blemish issue, perhaps you can post a pic or two of the Undertone with the blemish, or highlight the portion of the pics you posted that have the blemish if it is this speaker.
Blemishes aside, it will be interesting to see how your break in goes and how the sound improves.
What’s wrong with the cabinet? All I see is knots within the veneer which is normal for wood. From what you stated, I am interpreting that you said your Undertone had the blemish issue, perhaps you can post a pic or two of the Undertone with the blemish, or highlight the portion of the pics you posted that have the blemish if it is this speaker.