[Dracule1]

Is this a Chinese knockoff of another Chinese product?  I heard about the Treasure series with black coating but blue?

http://chinesetubes.com/index.php?main_page=product_info&products_id=45

[richidoo]

I thought the black carbon interior coating was a performance related feature.

Grant is out of stock on the CV-181, so maybe there is a change coming.

[Audioclyde]

I know the 'original' Treasure Series CV181-Z was blue glass--I previously had a pair and they sounded great.  I thought they discontinued the blue glass when they black coated glass version came out, but I may be mistaken.