Tech Talk
ABTEC1 Subwoofer Upgrade! From a DD Audio 9921 To a Z21!
Its not very often that I get to compare two different series DD Audio Subwoofers in the same enclosure yet alone two different 21″ Subwoofers! So when I was asked to do a comparison of the DD-9921 & DD-Z21 (Knowing this meant I got to daily ABTEC1 for some time.) Read more…