In a sign that Wall Street's recent weakness might be rippling through the economy, Tweeter Home Entertainment, which makes high-definition and large screen TVs, said its business was suffering and its shares dropped $3.50 or 26% to $9.95. 'Our sales have frequently shown a high degree of correlation with major moves in the overall stock market, and we believe this accounts for much of the top line degradation in June,' said chief financial officer Joe McGuire.