Mazda MX-5 Miata Sport 2007 Manual page 1174

Fig. 15: Identifying Rear Speaker (With Torque Specifications)
Courtesy of MAZDA MOTORS CORP.
5. Install in the reverse order of removal.
REAR SPEAKER INSPECTION
1. Inspect for resistance between the rear speaker terminals using an ohmmeter.
If the resistance is not within the specification, replace the rear speaker.
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2007 Mazda MX-5 Miata Sport
2007 ACCESSORIES & BODY, CAB Entertainment - MX-5 Miata