The design is the visual features of the Illuminated Speaker Device shown in solid lines in the drawings, whether those features are features of one of shape, configuration, ornament, or pattern, or are a combination of any of these features. Drawings of the design are included. FIG. 1 is a top elevation view of an Illuminated Speaker Device in a first state of a sequence, illustrating the design; FIG. 2 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 3 is a top elevation view thereof in a third, illuminated, state of the sequence; FIG. 4 is a top elevation view of an Illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating a first variant of the design; FIG. 5 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 6 is a top elevation view thereof in a third, illuminated, state of the sequence; FIG. 7 is a top elevation view thereof in a fourth, illuminated, state of the sequence; FIG. 8 is a top elevation view thereof in a fifth, illuminated, state of the sequence; FIG. 9 is a top elevation view of an Illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating a second variant of the design; FIG. 10 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 11 is a top elevation view thereof in a third, illuminated, state of the sequence; FIG. 12 is a top elevation view thereof in a fourth, illuminated, state of the sequence; FIG. 13 is a top elevation view thereof in a fifth, illuminated, state of the sequence; FIG. 14 is a top elevation view thereof in a sixth, illuminated, state of the sequence; FIG. 15 is a top elevation view thereof in a seventh, illuminated, state of the sequence; FIG. 16 is a top elevation view of an Illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating a third variant of the design; FIG. 17 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 18 is a top elevation view thereof in a third, illuminated, state of the sequence; FIG. 19 is a top elevation view thereof in a fourth, illuminated, state of the sequence; FIG. 20 is a top elevation view thereof in a fifth, illuminated, state of the sequence; FIG. 21 is a top elevation view thereof in a sixth, illuminated, state of the sequence; FIG. 22 is a top elevation view thereof in a seventh, illuminated, state of the sequence; FIG. 23 is a top elevation view thereof in an eighth, illuminated, state of the sequence; FIG. 24 is a top elevation view thereof in a ninth, illuminated, state of the sequence; FIG. 25 is a top elevation view thereof in a tenth, illuminated, state of the sequence; FIG. 26 is a top elevation view thereof in an eleventh, illuminated, state of the sequence; FIG. 27 is a top elevation view thereof in a twelfth state of the sequence; FIG. 28 is a top elevation view of an Illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating a fourth variant of the design; FIG. 29 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 30 is a top elevation view thereof in a third, illuminated, state of the sequence; FIG. 31 is a top elevation view thereof in a fourth, illuminated, state of the sequence; FIG. 32 is a top elevation view of an Illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating a fifth variant of the design; FIG. 33 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 34 is a top elevation view thereof in a third, illuminated, state of the sequence; FIG. 35 is a top elevation view thereof in a fourth, illuminated, state of the sequence; FIG. 36 is a top elevation view thereof in a fifth state of the sequence; FIG. 37 is a top elevation view of an illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating a sixth variant of the design; FIG. 38 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 39 is a top elevation view thereof in a third state of the sequence; FIG. 40 is a top elevation view of an Illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating a seventh variant of the design; FIG. 41 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 42 is a top elevation view thereof in a third, illuminated, state of the sequence; FIG. 43 is a top elevation view thereof in a fourth state of the sequence; FIG. 44 is a top elevation view of an Illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating an eighth variant of the design; FIG. 45 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 46 is a top elevation view thereof in a third, illuminated, state of the sequence; FIG. 47 is a top elevation view thereof in a fourth, illuminated, state of the sequence; FIG. 48 is a top elevation view thereof in a fifth, illuminated, state of the sequence; FIG. 49 is a top elevation view thereof in a sixth, illuminated, state of the sequence; FIG. 50 is a top elevation view thereof in a seventh, illuminated, state of the sequence; FIG. 51 is a top elevation view thereof in an eighth, illuminated, state of the sequence; FIG. 52 is a top elevation view thereof in a ninth, illuminated, state of the sequence; FIG. 53 is a top elevation view thereof in a tenth, illuminated, state of the sequence; FIG. 54 is a top elevation view thereof in an eleventh, illuminated, state of the sequence; FIG. 55 is a top elevation view of an Illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating a ninth variant of the design; FIG. 56 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 57 is a top elevation view thereof in a third, illuminated, state of the sequence; FIG. 58 is a top elevation view thereof in a fourth state of the sequence; FIG. 59 is a top elevation view thereof in a fifth, illuminated, state of the sequence; FIG. 60 is a top elevation view thereof in a sixth state of the sequence; FIG. 61 is a top elevation view thereof in a seventh, illuminated, state of the sequence; FIG. 62 is a top elevation view of an Illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating a tenth variant of the design; FIG. 63 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 64 is a top elevation view thereof in a third, illuminated, state of the sequence; FIG. 65 is a top elevation view thereof in a fourth, illuminated, state of the sequence; FIG. 66 is a top elevation view thereof in a fifth, illuminated, state of the sequence; FIG. 67 is a top elevation view of an Illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating an eleventh variant of the design; FIG. 68 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 69 is a top elevation view thereof in a third, illuminated, state of the sequence; FIG. 70 is a top elevation view thereof in a fourth, illuminated, state of the sequence; FIG. 71 is a top elevation view thereof in a fifth, illuminated, state of the sequence; FIG. 72 is a top elevation view thereof in a sixth, illuminated, state of the sequence; FIG. 73 is a top elevation view thereof in a seventh, illuminated, state of the sequence; FIG. 74 is a top elevation view of an Illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating a twelfth variant of the design; FIG. 75 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 76 is a top elevation view thereof in a third, illuminated, state of the sequence; FIG. 77 is a top elevation view thereof in a fourth, illuminated, state of the sequence; FIG. 78 is a top elevation view thereof in a fifth, illuminated, state of the sequence; FIG. 79 is a top elevation view thereof in a sixth, illuminated, state of the sequence; FIG. 80 is a top elevation view thereof in a seventh, illuminated, state of the sequence; FIG. 81 is a top elevation view thereof in an eighth, illuminated, state of the sequence; FIG. 82 is a top elevation view thereof in a ninth, illuminated, state of the sequence; FIG. 83 is a top elevation view thereof in a tenth, illuminated, state of the sequence; FIG. 84 is a top elevation view thereof in an eleventh, illuminated, state of the sequence; FIG. 85 is a top elevation view thereof in a twelfth, illuminated, state of the sequence; FIG. 86 is a top elevation view of an Illuminated Speaker Device in a first state of a sequence, illustrating a thirteenth variant of the design; FIG. 87 is a top elevation view thereof in a second illuminated state of the sequence; FIG. 88 is a top elevation view thereof in a third, illuminated, state of the sequence; FIG. 89 is a top elevation view thereof in a fourth, illuminated, state of the sequence; FIG. 90 is a top elevation view thereof in a fifth, illuminated, state of the sequence; FIG. 91 is a top elevation view of an Illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating a fourteenth variant of the design; FIG. 92 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 93 is a top elevation view thereof in a third, illuminated, state of the sequence; FIG. 94 is a top elevation view thereof in a fourth, illuminated, state of the sequence; FIG. 95 is a top elevation view thereof in a fifth state of the sequence; FIG. 96 is a top elevation view of an Illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating a fifteenth variant of the design; FIG. 97 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 98 is a top elevation view thereof in a third state of the sequence; FIG. 99 is a top elevation view of an illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating a sixteenth variant of the design; FIG. 100 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 101 is a top elevation view thereof in a third, illuminated, state of the sequence; FIG. 102 is a top elevation view of an Illuminated Speaker Device in an illuminated state, illustrating a seventeenth variant of the design; FIG. 103 is a top elevation view of an Illuminated Speaker Device in an illuminated state, illustrating an eighteenth variant of the design; FIG. 104 is a top elevation view of an Illuminated Speaker Device in an illuminated state, illustrating a nineteenth variant of the design; FIG. 105 is a top elevation view of an Illuminated Speaker Device in an illuminated state, illustrating a twentieth variant of the design; FIG. 106 is a top elevation view of an Illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating a twenty-first variant of the design; FIG. 107 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 108 is a top elevation view thereof in a third, illuminated, state of the sequence; FIG. 109 is a top elevation view thereof in a fourth, illuminated, state of the sequence; FIG. 110 is a top elevation view thereof in a fifth state of the sequence; FIG. 111 is a top elevation view of an Illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating a twenty-second variant of the design; FIG. 112 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 113 is a top elevation view thereof in a third state of the sequence; FIG. 114 is a top elevation view of an Illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating a twenty-third variant of the design; FIG. 115 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 116 is a top elevation view thereof in a third, illuminated, state of the sequence; FIG. 117 is a top elevation view thereof in a fourth state of the sequence; FIG. 118 is a top elevation view of an Illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating a twenty-fourth variant of the design; FIG. 119 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 120 is a top elevation view thereof in a third, illuminated, state of the sequence; FIG. 121 is a top elevation view thereof in a fourth, illuminated, state of the sequence; FIG. 122 is a top elevation view thereof in a fifth, illuminated, state of the sequence; FIG. 123 is a top elevation view thereof in a sixth, illuminated, state of the sequence; FIG. 124 is a top elevation view thereof in a seventh, illuminated, state of the sequence; FIG. 125 is a top elevation view thereof in an eighth, illuminated, state of the sequence; FIG. 126 is a top elevation view thereof in a ninth, illuminated, state of the sequence; FIG. 127 is a top elevation view thereof in a tenth, illuminated, state of the sequence; FIG. 128 is a top elevation view thereof in an eleventh, illuminated, state of the sequence; FIG. 129 is a top elevation view thereof in a twelfth, illuminated, state of the sequence; FIG. 130 is a top elevation view thereof in a thirteenth, illuminated, state of the sequence; FIG. 131 is a top elevation view of an Illuminated Speaker Device in a first, illuminated, state of a sequence, illustrating a twenty-fifth variant of the design; FIG. 132 is a top elevation view thereof in a second, illuminated, state of the sequence; FIG. 133 is a top elevation view thereof in a third, illuminated, state of the sequence; FIG. 134 is a top elevation view thereof in a fourth state of the sequence; FIG. 135 is a top elevation view thereof in a fifth, illuminated, state of the sequence; FIG. 136 is a top elevation view thereof in a sixth state of the sequence; and FIG. 137 is a top elevation view thereof in a seventh, illuminated, state of the sequence. The circular shaded elements indicate illumination. Here, relative intensity is indicated by lighter or darker shading, with darker shading indicating higher intensity corresponding to a brighter light. By way of example, in some figures there are up to three levels of illumination intensity indicated by the circular shaded elements.