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Vintage Altec Lansing 604-8H Crossover Schematic
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Altec Lansing 604B Phase Correct Crossover with MF EQ
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Vintage Altec 604-8H Crossover Schematic
Simplified 604-8H EQ Crossover
Altec Lansing 604-8H Phase-Correct Crossover with MF EQ
Vintage Altec Lansing N1500A Schematic
Vintage Altec Model 19 Crossover Schematic
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604-8H Schematic - Thanks to Jim Easley for his assistance. (192kB in pdf format)

click here to download file