AM8075SE Athena Filter
AMSynths Page 5
3Module Description
The AM8075SE is a clone of the ARP 4075 4-pole 24dB low
pass filter in the ARP Odyssey Mark 3, Omni, Quadra and
Solus, and very similar to the ARP 4072 filter in later
models of the ARP 2600. The module also has a single pole
High Pass filter connected in series after the low pass filter.
This Special Edition (SE) uses high quality internal
components such as matched transistor arrays, low
distortion and low offset op amps and precision
Polypropylene capacitors, for a pristine sound quality. The
external design replicates the “look and feel” of the ARP
Odyssey Mk1 with slide potentiometers and coloured caps.
At the heart of this module is the LM3900 Norton Amplifier
chip which delivers the distinctive "smooth" 4-pole low pass
filter, with a clean low distortion output that will oscillate at
higher resonance settings. The filter response at high
resonance remains faithful to the original with a slight loss
of bass at higher resonance.
The high pass filter in the original ARP Odyssey is rather a
nasty affair based on a CA3080 OTA chip, so I have
replaced it with an improved design based on the higher
quality BA6110 OTA chip.
Athena is the Greek Goddess of inspiration and skill, and
we think this skillfully engineered filter will inspired your
music! The sound and look of the ARP Odyssey synthesizer,
and much more.
