a head end section containing a fuel nozzle assembly and defining a head end air plenum; a liner extending downstream from the head end section toward an aft frame and defining a combustion chamber therein;

a first plurality of injectors disposed at a first axial location spaced apart from the head end section to direct a first fuel/air mixture through the liner;

a dynamics mitigation system comprising a plurality of cold-side resonators disposed wholly within the head end air plenum, each resonator of the plurality of cold-side resonators having a resonator body with a closed end and an open neck extending from the resonator body opposite the closed end, wherein the resonator body defines a respective volume, and the open neck is in fluid communication with the head end air plenum, wherein the open neck of at least one resonator in the plurality of cold-side resonators has a smaller diameter than the closed end of the at least one resonator in the plurality of cold-side resonators, and wherein the plurality of cold-side resonators is axially oriented; and

an upstream inner barrel that partially surrounds the head air plenum, wherein the plurality of cold-side resonators is coupled to the upstream inner barrel.