petteyr Posted September 17, 2019 Report Share Posted September 17, 2019 Hi, I am looking for the crossover schematics for the Allison Threes. I have a set of late model cherry Allison Threes, and a set of early first gens. Crossovers look totally different. Quote Link to comment Share on other sites More sharing options...
newandold Posted September 18, 2019 Report Share Posted September 18, 2019 On 9/16/2019 at 10:45 PM, petteyr said: Hi, I am looking for the crossover schematics for the Allison Threes. I have a set of late model cherry Allison Threes, and a set of early first gens. Crossovers look totally different. I’m pretty sure I have a copy of the original 3 schematic. Away for a few days but will post it when I get back. Quote Link to comment Share on other sites More sharing options...
newandold Posted September 20, 2019 Report Share Posted September 20, 2019 On 9/16/2019 at 10:45 PM, petteyr said: Hi, I am looking for the crossover schematics for the Allison Threes. I have a set of late model cherry Allison Threes, and a set of early first gens. Crossovers look totally different. Turns out I don’t have hard copy on the THREE crossover....however I forgot about saved files on another computer of mine that has a good size Allison File. I’ll check that in a few days and won’t post on this again unless there’s a file attached! Bill Quote Link to comment Share on other sites More sharing options...
teknofossil Posted November 9, 2019 Report Share Posted November 9, 2019 Hello. There were 2 versions of the original Allison 3 crossover. Later model had separate input terminals for the woofers and midrange /tweeter section. Separated this allowed the Allison 3 to be bi-amplified . Jumpers were in place for single amplifier use. Allison 3 systems produced after the company rose like a Phoenix may have used a different crossover since the drivers were likely somewhat different than those made decades earlier in Natick and Roy Allison, who designed these systems may have different ideas on crossover design. I have not seen a schematic for this newer design. Quote Link to comment Share on other sites More sharing options...
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