The 676's mic/line preamp delivers up to 64dB of gain and is equipped with "premium" 12AX7/ECC83S and 12AT7/6072 vacuum tubes that Behringer claims will add "rich, harmonic warmth" to any signal.
Like the 6176, Behringer's 676 packs a mic preamp and FET compressor based on classic UA gear into a rackmount unit. Unlike the 6176, it costs $469 ...