JB, Roger Russell, whose excellent article on speaker wire has been linked many times here, makes available for ordering copies of various equipment reviews from past issues of audio magazines. As shown in his list here , the July, 1982 High Fidelity review of the DH-500 is available.

If you aren't able to get it from here or AVS, you should be able to make arrangements with Mr. Russell for ordering it(tip included)from him.

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Enjoy the music, not the equipment.