LaChapell Audio 503 500-Series EQ

The LaChapell Audio 503 is a 500-series 3-band EQ based on the 583e mic preamp module.
The LaChapell Audio 503 is a transformer-less, clean and transparent EQ producing very low distortion and minimal phase shift ensuring keeping the punch and detail of the incoming sound.
Each band offers +/-12dB cut or boost and continuous variable frequency control. Low-pass and High-pass filters are also included offering a 50Hz and 150Hz for the low frequencies and 5kHz and 10kHz high frequencies. In addition the 500-series EQ includes +/- 6dB overall trim gain stage.
LaChapell Audio 503 500-series EQ Overview:

Transformer-less EQ
Cut/Boost range increased to +/- 12dB
Low pass filter at 5k & 10k
High pass filter at 50hz & 150hz
+/- 6dB overall trim gain stage
Noise floor: -95dB
THD+N: 0.012% (@ +4 output)
Frequency response: 10hz to 50Khz (flat)
Cut/boost range: +/- 12dB
Max input Lvl: >24dB
Input Z: 48kohm
Input/output type: transformer-less