Typically, yes. They used a 2-pole, 12dB/oct filter. You could
get them to resonate by reducing the resistance in the feedback
path.
From: emlsynth@yahoogroups.com [mailto:emlsynth@yahoogroups.com] On Behalf Of bill bigrig
Sent: Wednesday, November 02, 2011 6:15 AM
To: emlsynth@yahoogroups.com
Subject: [emlsynth] Re: EML500 filter resonance
Howdy,i've had an EML 500 for many years, ($20 cost), the filter will not resonate enough to go into oscillation. Is this normal?Rig