Folded horn enclosure with inter-channel reflex-porting

A folded horn enclosure comprising:

• a horn structure including at least two flaring horn sections conjoined in operating relation, wherein a first section exhausts into and is operationally enclosed by the throat opening of a following second section and wherein the said second section throat comprises a larger cross-sectional area than the cross-sectional area of the mouth of the said first section,
• said sections having one or more flare rates,
• said structure further including at least one phase-inverting ducted area arranged to exhaust into the throat of the second of said sections proximate to the conjoining area of the said sections,
• said at least one phase-inverting ducted area further being partially defined by the spatial separation between said first section mouth terminus and said second section throat opening,
• said at least one phase inverting ducted area arranged to exhaust in a direction substantially parallel to said first section pathway into said second section.

In a folded horn loudspeaker for reproducing low frequencies,

• an enclosure with a predominately rectangular footprint consisting of a substantially vertically-elongated shape comprised of panels arranged in sealed engagement, including a butterfly throat horn section arranged rearwardly therein perpendicular to the central longitudinal axis of said enclosure, bifurcating said throat channel symmetrically with each said bifurcated channel having a horizontal pathway,
• said chamber partially comprised of convergently-angled panels, said chamber being inwardly and axially arranged in said enclosure, said rearward panel having a throat opening to transmit sound waves into said throat section, and at least one sound producing driver being housed therein,
• said convergently-angled panels partially defining a further section of horn having a lower flare rate, progressing from said throat section on opposite sides of said back chamber, and being enclosed at the outward sides by panels forming the outer sides of said enclosure, said further section exhausting at the end of the enclosure opposite of said throat section and thereby forming a terminus for said horn section, said terminus having a predominately rectangular proportion therein,
• said further section arranged with a larger cross-sectional area compared to said throat section,
• said back chamber including tuned passages exhausting parallel to and in relation with said horizontal passages into said further section forming a confluence therein,
• completing means for said throat section, said further section and said back chamber,
• means for access into said back chamber, and
• means for exhausting said terminus into the atmosphere.

A folded low frequency horn enclosure, comprising:

• an inwardly arranged back chamber assembly and an outwardly arranged assembly comprised of panels, said outward assembly comprising a substantially elongated rectangular shape and having a central axis laterally arranged therein,
• said back chamber assembly comprising an axially perpendicular bifurcated throat assembly which exhausts into two separate terminal channels using a lower flare rate,
• said back chamber further comprising at least one bilaterally-exhausting tuned port proximate to said throat assembly and terminating equally therewith,
• said at least one tuned port exhausting substantially parallel to and in proximate relation with said throat assembly exhaustion into said terminal channels,
• said terminal channels cooperating with said back chamber to each exhaust parallel to said axis at the opposite end of said enclosure from said throat assembly and thereby forming a horn mouth.