 The " professional " version launched some nine years after its first introduction on the back of the popularity of the NS @-@ 10 among engineers . The revised version , with everything including the logo and connection panel <unk> horizontally , was <unk> " NS @-@ 10M Studio " . <unk> included a new tweeter and crossover to address the problem in the treble , better connection terminals , and a <unk> cabinet that no longer accommodates <unk> . The Studio reincarnation also has improved power handling – 60 – 120 W. In excess of 200 @,@ 000 pairs of " Studio " alone were sold throughout the world . 
