BBE Sonic Maximizer

500 Series equivalent of a single channel of the BBE 882i rackmount processor.

The sonic maximizer series have slightly different numbers for relevant frequencies and other variables per model, but what they all actually do is:

1. split the signal into three bands, a low, mid, and high
2. use the phase charecteristics of the state variable filter itself to apply a small group delay to the mid band and a slightly longer group delay to the low band
3. the bands are mixed back together, with "lo-contour" controlling the level of the low band and "process" controlling the level of the high band

+23dB of output headroom
118dB signal to noise ratio
Frequency response: 5Hz to 30kHz +/-0.5dBu, -10dBu input
Total harmonic distortion (THD): less than 0.1% at -10dBu input, 20-20kHz
Maximum output: +20dBu (may vary due to control settings)
Input impedance: 47k Ohms balanced XLR
Output impedance: 600 Ohms balanced XLR
Sensitivity: -45dBu for maximum process

https://bbesound.com/products/sonic-maximizers/SM500.aspx