Aphex 228 8-Channel Audio Level Interface The 228 high definition servo balanced input and output circuits remains as the premier bidirectional stereo level interface originated from the 124A. The front panel extended range VU meter and trim controls allow each channel to be calibrated and monitored individually. Two-color signal presence/clip indicators let you know instantly if sound is present on each channel or if an overload occurs. Use for interfacing consumer surround equipment to pro amps and speakers. Servo balanced input and output circuits. Independent output level trim adjustments. Front panel LED VU meters with illumination dim control. Made in USA