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 perspective view of an Illuminated Speaker Device, illustrating the design in a state; FIG. 2 is a bottom perspective view thereof; FIG. 3 is a front elevation view thereof; FIG. 4 is a rear elevation view thereof; FIG. 5 is a right side elevation view thereof; FIG. 6 Is a left side elevation view thereof; FIG. 7 Is a top elevation view thereof; FIG. 8 is a bottom elevation view thereof; FIG. 9 is a top perspective view of an Illuminated Speaker Device, illustrating the design In a second, illuminated, state; FIG. 10 is a bottom perspective view thereof; FIG. 11 is a front elevation view thereof; FIG. 12 is a rear elevation view thereof; FIG. 13 is a right side elevation view thereof; FIG. 14 is a left side elevation view thereof; FIG. 15 is a top elevation view thereof; FIG. 16 is a bottom elevation view thereof; FIG. 17 is a top perspective view of an Illuminated Speaker Device, illustrating the design in a third, illuminated, state; FIG. 18 is a bottom perspective view thereof; FIG. 19 is a front elevation view thereof; FIG. 20 is a rear elevation view thereof; FIG. 21 is a right side elevation view thereof; FIG. 22 is a left side elevation view thereof; FIG. 23 is a top elevation view thereof; FIG. 24 is a bottom elevation view thereof; FIG. 25 is a top elevation view of an Illuminated Speaker Device, illustrating the design in a first illuminated state of the first sequence of illuminated states, the bottom perspective, front, rear, right side, left side and bottom views corresponding to Figs. 2-6 and 8; FIG. 26 is a top elevation view thereof in a second illuminated state; FIG. 27 is a top elevation view thereof in a third illuminated state; FIG. 28 is a top elevation view thereof in a fourth illuminated state; FIG. 29 is a top elevation view thereof in a fifth illuminated state; FIG. 30 is a top elevation view of an Illuminated Speaker Device, illustrating the design in a first illuminated state of the second sequence of illuminated states, the bottom perspective, front, rear, right side, left side and bottom views corresponding to Figs. 2-6 and 8; FIG. 31 is a top elevation view thereof in a second illuminated state; FIG. 32 is a top elevation view thereof in a third illuminated state; FIG. 33 Is a top elevation view thereof in a fourth illuminated state; FIG. 34 is a top elevation view thereof in a fifth illuminated state; FIG. 35 is a top elevation view thereof in a sixth illuminated state; FIG. 36 is a top elevation view thereof in a seventh illuminated state; FIG. 37 is a top elevation view of an Illuminated Speaker Device, illustrating the design in a first illuminated state of the third sequence of illuminated states, the bottom perspective, front, rear, right side, left side and bottom views corresponding to Figs. 2-6 and 8; FIG. 38 is a top elevation view thereof in a second illuminated state; FIG. 39 is a top elevation view thereof in a third illuminated state; FIG. 40 is a top elevation view thereof in a fourth illuminated state; FIG. 41 is a top elevation view thereof in a fifth illuminated state; FIG. 42 is a top elevation view thereof in a sixth illuminated state; FIG. 43 is a top elevation view thereof in a seventh Illuminated state; FIG. 44 is a top elevation view thereof in an eighth illuminated state; FIG. 45 is a top elevation view thereof in a ninth illuminated state; FIG. 46 is a top elevation view thereof in a tenth illuminated state; FIG. 47 is a top elevation view thereof in an eleventh illuminated state; FIG. 48 is a top elevation view thereof in a twelfth illuminated state; FIG. 49 is a top elevation view of an Illuminated Speaker Device, illustrating the design in a first illuminated state of the fourth sequence of illuminated states, the bottom perspective, front, rear, right side, left side and bottom views corresponding to Figs. 2-6 and 8; FIG. 50 is a top elevation view thereof in a second illuminated state; FIG. 51 is a top elevation view thereof in a third illuminated state; FIG. 52 is a top elevation view thereof in a fourth illuminated state; FIG. 53 is a top elevation view thereof in a fifth illuminated state; FIG. 54 is a top elevation view of an Illuminated Speaker Device, illustrating the design in a first illuminated state of the fifth sequence of illuminated states, the bottom perspective, front, rear, right side, left side and bottom views corresponding to Figs. 2-6 and 8; FIG. 55 is a top elevation view thereof in a second illuminated state; FIG. 56 is a top elevation view thereof in a third illuminated state; FIG. 57 is a top elevation view thereof in a fourth illuminated state; FIG. 58 is a top elevation view thereof in a fifth illuminated state; FIG. 59 is a top elevation view of an Illuminated Speaker Device, Illustrating the design in a first illuminated state of the sixth sequence of illuminated states, the bottom perspective, front, rear, right side, left side and bottom views corresponding to Figs. 2-6 and 8; FIG. 60 is a top elevation view thereof in a second illuminated state; FIG. 61 is a top elevation view thereof in a third illuminated state; FIG. 62 is a top elevation view of an Illuminated Speaker Device, illustrating the design in a first illuminated state of the seventh sequence of illuminated states, the bottom perspective, front, rear, right side, left side and bottom views corresponding to Figs. 2-6 and 8; FIG. 63 is a top elevation view thereof in a second illuminated state; FIG. 64 is a top elevation view thereof in a third illuminated state; FIG. 65 is a top elevation view thereof in a fourth illuminated state; FIG. 66 is a top elevation view of an Illuminated Speaker Device, illustrating the design in a first illuminated state of the eighth sequence of illuminated states, the bottom perspective, front, rear, right side, left side and bottom views corresponding to Figs. 2-6 and 8; FIG. 67 is a top elevation view thereof in a second illuminated state; FIG. 68 is a top elevation view thereof in a third illuminated state; FIG. 69 is a top elevation view thereof in a fourth illuminated state; FIG. 70 is a top elevation view thereof in a fifth illuminated state; FIG. 71 is a top elevation view thereof in a sixth illuminated state; FIG. 72 is a top elevation view thereof in a seventh illuminated state; FIG. 73 is a top elevation view thereof in an eighth illuminated state; FIG. 74 is a top elevation view thereof in a ninth illuminated state; FIG. 75 is a top elevation view thereof in a tenth illuminated state; FIG. 76 is a top elevation view thereof in an eleventh illuminated state; FIG. 77 is a top elevation view thereof in a twelfth illuminated state; FIG. 78 is a top elevation view of an Illuminated Speaker Device, illustrating the design in a first illuminated state of the ninth sequence of illuminated states, the bottom perspective, front, rear, right side, left side and bottom views corresponding to Figs. 2-6 and 8; FIG. 79 is a top elevation view thereof in a second illuminated state; FIG. 80 is a top elevation view thereof in a third illuminated state; FIG. 81 is a top elevation view thereof in a fourth illuminated state; FIG. 82 is a top elevation view thereof in a fifth illuminated state; FIG. 83 is a top elevation view thereof in a sixth illuminated state; FIG. 84 is a top elevation view thereof in a seventh illuminated state; FIG. 85 is a top perspective view of an illuminated Speaker Device, illustrating a first variant of the design in a state; FIG. 86 is a bottom perspective view thereof; FIG. 87 is a front elevation view thereof; FIG. 88 is a rear elevation view thereof; FIG. 89 is a right side elevation view thereof; FIG. 90 is a left side elevation view thereof; FIG. 91 is a top elevation view thereof; FIG. 92 is a bottom elevation view thereof; FIG. 93 is a top perspective view of an Illuminated Speaker Device, illustrating a first variant of the design in a second, illuminated, state; FIG. 94 is a bottom perspective view thereof; FIG. 95 is a front elevation view thereof; FIG. 96 is a rear elevation view thereof; FIG. 97 is a right side elevation view thereof; FIG. 98 is a left side elevation view thereof; FIG. 99 is a top elevation view thereof; FIG. 100 is a bottom elevation view thereof; FIG. 101 is a top perspective view of an Illuminated Speaker Device, illustrating a first variant of the design in a third, illuminated, state; FIG. 102 is a bottom perspective view thereof; FIG. 103 is a front elevation view thereof; FIG. 104 is a rear elevation view thereof; FIG. 105 is a right side elevation view thereof; FIG. 106 is a left side elevation view thereof; FIG. 107 is a top elevation view thereof; FIG. 108 is a bottom elevation view thereof; FIG. 109 is a top elevation view of an Illuminated Speaker Device, illustrating a first variant of the design in a first illuminated state of the first sequence of illuminated states, the bottom perspective, front, rear, right side, left side and bottom views corresponding to Figs. 86-90 and 92; FIG. 110 is a top elevation view thereof in a second illuminated state; FIG. 111 is a top elevation view thereof in a third illuminated state; FIG. 112 is a top elevation view thereof in a fourth illuminated state; FIG. 113 is a top elevation view thereof in a fifth illuminated state; FIG. 114 is a top elevation view of an Illuminated Speaker Device, illustrating a first variant of the design in a first illuminated state of the second sequence of illuminated states, the bottom perspective, front, rear, right side, left side and bottom views corresponding to Figs. 86-90 and 92; FIG. 115 is a top elevation view thereof in a second illuminated state; FIG. 116 is a top elevation view thereof in a third illuminated state; FIG. 117 is a top elevation view thereof in a fourth illuminated state; FIG. 118 is a top elevation view thereof in a fifth illuminated state; FIG. 119 is a top elevation view thereof in a sixth illuminated state; FIG. 120 is a top elevation view thereof in a seventh illuminated state; FIG. 121 is a top elevation view of an Illuminated Speaker Device, illustrating a first variant of the design in a first Illuminated state of the third sequence of illuminated states, the bottom perspective, front, rear, right side, left side and bottom views corresponding to Figs. 86-90 and 92; FIG. 122 is a top elevation view thereof in a second Illuminated state; FIG. 123 is a top elevation view thereof in a third illuminated state; FIG. 124 is a top elevation view thereof in a fourth illuminated state; FIG. 125 is a top elevation view thereof in a fifth illuminated state; FIG. 126 is a top elevation view thereof in a sixth illuminated state; FIG. 127 is a top elevation view thereof in a seventh illuminated state; FIG. 128 is a top elevation view thereof in an eighth illuminated state; FIG. 129 is a top elevation view thereof in a ninth illuminated state; FIG. 130 is a top elevation view thereof in a tenth illuminated state; FIG. 131 is a top elevation view thereof in an eleventh illuminated state; FIG. 132 is a top elevation view thereof in a twelfth illuminated state; FIG. 133 is a top elevation view of an Illuminated Speaker Device^, illustrating a first variant of the design in a first illuminated state of the fourth sequence of illuminated states, the bottom perspective, front, rear, right side, left side and bottom views corresponding to Figs. 86-90 and 92; FIG. 134 is a top elevation view thereof in a second illuminated state; FIG. 135 is a top elevation view thereof in a third illuminated state; FIG. 136 is a top elevation view thereof in a fourth illuminated state; FIG. 137 is a top elevation view thereof in a fifth illuminated state; FIG. 138 is a top elevation view of an Illuminated Speaker Device, illustrating a first variant of the design in a first illuminated state of the fifth sequence of illuminated states, the bottom perspective, front, rear, right side, left side and bottom views corresponding to Figs. 86-90 and 92; FIG. 139 is a top elevation view thereof in a second illuminated state; FIG. 140 is a top elevation view thereof in a third illuminated state; FIG. 141 is a top elevation view thereof in a fourth illuminated state; FIG. 142 is a top elevation view thereof in a fifth illuminated state; FIG. 143 is a top elevation view of an Illuminated Speaker Device, illustrating a first variant of the design in a first illuminated state of the sixth sequence of illuminated states, the bottom perspective, front, rear, right side, left side and bottom views corresponding to Figs. 86-90 and 92; FIG. 144 is a top elevation view thereof in a second illuminated state; FIG. 145 is a top elevation view thereof in a third illuminated state; FIG. 146 is a top elevation view of an Illuminated Speaker Device, illustrating a first variant of the design in a first illuminated state of the seventh sequence of illuminated states, the bottom perspective, front, rear, right side, left side and bottom views corresponding to Figs. 86-90 and 92; FIG. 147 is a top elevation view thereof in a second illuminated state; FIG. 148 is a top elevation view thereof in a third illuminated state; FIG. 149 is a top elevation view thereof in a fourth illuminated state; FIG. 150 is a top elevation view of an Illuminated Speaker Device, illustrating a first variant of the design in a first illuminated state of the eighth sequence of illuminated states, the bottom perspective, front, rear, right side, left side and bottom views corresponding to Figs. 86-90 and 92; FIG. 151 is a top elevation view thereof in a second illuminated state; FIG. 152 is a top elevation view thereof in a third illuminated state; FIG. 153 is a top elevation view thereof in a fourth illuminated state; FIG. 154 is a top elevation view thereof in a fifth illuminated state; FIG. 155 Is a top elevation view thereof in a sixth illuminated state; FIG. 156 is a top elevation view thereof in a seventh illuminated state; FIG. 157 is a top elevation view thereof in an eighth illuminated state; FIG. 158 is a top elevation view thereof in a ninth illuminated state; FIG. 159 is a top elevation view thereof in a tenth illuminated state; FIG. 160 is a top elevation view thereof in an eleventh illuminated state; FIG. 161 is a top elevation view thereof in a twelfth illuminated state; FIG. 162 is a top elevation view of an Illuminated Speaker Device, illustrating a first variant of the design in a first Illuminated state of the ninth sequence of illuminated states, the bottom perspective, front, rear, right side, left side and bottom views corresponding to Figs. 86-90 and 92; FIG. 163 is a top elevation view thereof in a second illuminated state; FIG. 164 is a top elevation view thereof in a third illuminated state; FIG. 165 is a top elevation view thereof in a fourth illuminated state; FIG. 166 is a top elevation view thereof in a fifth illuminated state; FIG. 167 is a top elevation view thereof in a sixth illuminated state; and FIG. 168 is a top elevation view thereof in a seventh illuminated state. The broken line portions are included for Illustration only and form no part of the design. 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.