RDL TX-70A Input Interface with unbalanced line out

Features:

Matches a 100, 70 or 25 volt speaker line to any unbalanced line-level audio input
Trimmer adjusts output level for various input voltage/power levels
Frequency response: 20 Hz to 20 kHz (+/- 0.5 dB)
THD: < 0.05% (1 kHz)