Which Speaker Size is Right for your Boat?

M-Series

M770 Series
Oversized 7.7-inch Speakers

Woofer Frame Outer Diameter (A):  7.70 in / 196 mm
Bolt Hole Circle (B):  6.92 in / 176 mm
Woofer Mounting Hole Diameter:  6.25 in / 159 mm
Woofer Mounting Depth:  3.15 in / 80 mm

Oversize design results in more cone area, higher output and better bass response than "6.5-inch" marine speakers. Requires larger mounting hole and mounting flange area.

M650 Series
Narrow-Flange 6.5-inch Speakers

Woofer Frame Outer Diameter (A):  6.55 in / 166 mm
Bolt Hole Circle (B):  5.79 in / 147 mm
Woofer Mounting Hole Diameter:  5-5.25 in / 127-133 mm
Woofer Mounting Depth:  2.95 in / 75 mm

To allow fitment in tighter spaces, this speaker has a narrower flange and a smaller bolt hole circle than a standard marine "6.5-inch" speaker.

MX-Series

MX770 Series
Oversized 7.7-inch Speakers

Woofer Frame Outer Diameter (A): 7.70 in / 196 mm
Bolt Hole Circle (B): 6.92 in / 176 mm
Woofer Mounting Hole Diameter: 6.25 in / 159 mm
Woofer Mounting Depth: 3.15 in / 80 mm

Oversize design results in more cone area, higher output and better bass response than "6.5-inch" marine speakers. Requires larger mounting hole and mounting flange area.

MX650 Series
Standard Flange "6.5-inch" Speakers

Woofer Frame Outer Diameter (A): 6.90 in / 175 mm
Bolt Hole Circle (B): 6.125 in / 155.5 mm
Woofer Mounting Hole Diameter: 5-5.25 in / 127-133 mm
Woofer Mounting Depth: 2.74 in / 69.5 mm

This speaker uses a standard, wide-flange, marine 6.5-inch, frame (which is actually 6.9-inches in diameter) and is a direct replacement for most marine 6.5-inch speakers.