A ported speaker assembly comprising: an outer enclosure having a front opening; an inner frame positioned at least partially within the outer enclosure and having an outer perimeter portion proximate the front opening of the outer enclosure; a resonator chamber defined between an interior of the outer enclosure and an exterior of the inner frame; at least one speaker driver (48A, 48B) mounted to the inner frame and configured to emit sound from a front end of the ported speaker assembly; a perimeter port formed between the outer perimeter portion of the inner frame and the front opening of the outer enclosure to establish sound wave communication between the resonator chamber and a surrounding external atmosphere for tuned-frequency resonance output, and wherein the perimeter port extends uninterrupted about the outer perimeter edge of the inner frame so as to encircle the outer perimeter edge; characterised in a plurality of fastener joints (70A, 70B) securing the inner frame to the outer enclosure, wherein at least some of the plurality of fastener joints (70A, 70B) are distributed around multiple sides of the inner frame and positioned closer to the front opening of the outer enclosure than a rear end of the inner frame, wherein each of the plurality of fastener joints (70A, 70B) includes a thread fastener, a washer, a clearance hole for receiving the thread fastener, and a nut portion for engaging the threaded fastener, and wherein the plurality of fastener joints (70A, 70B) are configured to absorb all assembly tolerance between the outer enclosure and the inner frame such that the tolerances on the overall dimensions of the speaker assembly are determined by the outer enclosure alone. an outer enclosure having a front opening; an inner frame positioned at least partially within the outer enclosure and having an outer perimeter portion proximate the front opening of the outer enclosure; a resonator chamber defined between an interior of the outer enclosure and an exterior of the inner frame; at least one speaker driver (48A, 48B) mounted to the inner frame and configured to emit sound from a front end of the ported speaker assembly; a perimeter port formed between the outer perimeter portion of the inner frame and the front opening of the outer enclosure to establish sound wave communication between the resonator chamber and a surrounding external atmosphere for tuned-frequency resonance output, and wherein the perimeter port extends uninterrupted about the outer perimeter edge of the inner frame so as to encircle the outer perimeter edge; characterised in a plurality of fastener joints (70A, 70B) securing the inner frame to the outer enclosure, wherein at least some of the plurality of fastener joints (70A, 70B) are distributed around multiple sides of the inner frame and positioned closer to the front opening of the outer enclosure than a rear end of the inner frame, wherein each of the plurality of fastener joints (70A, 70B) includes a thread fastener, a washer, a clearance hole for receiving the thread fastener, and a nut portion for engaging the threaded fastener, and wherein the plurality of fastener joints (70A, 70B) are configured to absorb all assembly tolerance between the outer enclosure and the inner frame such that the tolerances on the overall dimensions of the speaker assembly are determined by the outer enclosure alone.