HSavasten Posted March 21 Share Posted March 21 I recently acquired some commercial Heresys (SN 141X569) and was planning on cutting into them to add tweeters. I was just wondering if anyone has the measurements to figure out where exactly they would need to go? They don't have any markings for where the tweeter should go. Quote Link to comment Share on other sites More sharing options...
winglet Posted March 23 Share Posted March 23 Stock k77 cutout is 4.1" by 1.6" with rounded corners that match the mid cutout radius. On the Heresy 1 the bottom of it is about 3/4" above the mid cutout for the k700. Heresy 1.5 with the rear mounted resin mid horn (k701) it is a little higher because the upper flange of the the mid horn isn't notched like the metal mid horn is. Google interior pics and you'll see what I mean. Quote Link to comment Share on other sites More sharing options...
HSavasten Posted March 23 Author Share Posted March 23 Awesome! Thanks for the help. Quote Link to comment Share on other sites More sharing options...
geezin' Posted March 23 Share Posted March 23 The Heresy comes with (K-77 M in mine) tweeters. I am at a loss to what exactly you're trying to do. Could you explain? Quote Link to comment Share on other sites More sharing options...
winglet Posted March 23 Share Posted March 23 I assume he has a pair of these 2 way theater surround heresy and wants to add a tweeter to make a heresy i. Not sure what the crossover in them looks like, but you’ll need to modify it to probably a type E. Quote Link to comment Share on other sites More sharing options...
geezin' Posted March 23 Share Posted March 23 Had no idea those existed. Interesting. Quote Link to comment Share on other sites More sharing options...
geezin' Posted March 23 Share Posted March 23 And does this help? Quote Link to comment Share on other sites More sharing options...
OO1 Posted March 24 Share Posted March 24 On 3/21/2023 at 12:39 PM, HSavasten said: I recently acquired some commercial Heresys (SN 141X569) and was planning on cutting into them to add tweeters. I was just wondering if anyone has the measurements to figure out where exactly they would need to go? They don't have any markings for where the tweeter should go. no need to cut anything , just mount the tweeter on a bracket on the outside , what kind of tweeters do you have 1 Quote Link to comment Share on other sites More sharing options...
HSavasten Posted April 5 Author Share Posted April 5 Yeah like winglet said these are just two ways and are in a Heresy Cabinet (and have a Heresy label) but there is no access hole for tweeters but it does have type E crossovers with a hookup and proper circuitry to simply cut a hole and wire up a tweeter. Quote Link to comment Share on other sites More sharing options...
winglet Posted April 5 Share Posted April 5 Inside photos of heresy 1 vs 1.5. You can see on the 1.5 the k77 tweeter was mounter higher on the motorboard to clear the straight upper flange of the resin k701 mid horn. Quote Link to comment Share on other sites More sharing options...
Marvel Posted April 6 Share Posted April 6 As OO1 said, if you have a tweeter, you could mount it in a separate baffle and place on top of the cabinets. That way you could also slide it back so the mid and tweet diaphragms are more closely aligned, so they are also 'time' aligned. That will help with mid/tweeter smear at the crossover point. Here's a pic of ones I had on top of my La Scalas. Quote Link to comment Share on other sites More sharing options...
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