The Jensen Spectrum 520's was made back in the late 70's. I picked up a pair of these for $1.00 at a local estate auction. The foam and gaskets are gone and need replacing, and the cabinets will require some polishing. It should be a good project for me. I just ordered the needed supplies and will give the restore a shot. I will update my progress as it moves forward. Read about the family of Spectrum speakers in this old magazine ad from 1977. It talks mostly about the 3-way model- the 530. Specs on these speakers are hard to find online, so this information does offer good value.

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