halltyler Posted January 26, 2003 Share Posted January 26, 2003 I'm getting in another pair of heresies (thanks dean) and plan on running them both on the left channel in parallel and another pair of heresies on the right also in parallel. I'm going to drive the array 4 ohm array with quicksilver 60W monoblocks (these have 8417 tubes). Any one out there have any advice/experience with doing this sort of thing? Any thoughts - warnings - recommendations? I'm an electrical engineer, but don't work in audio and am just getting started with tube amps and good speakers....and there is a lot of great and knowledgeable people on this forum (i'm new to it too). Ii'm building my own pre-amp and phono stages. Quote Link to comment Share on other sites More sharing options...
Deang Posted January 26, 2003 Share Posted January 26, 2003 Hi Tyler, I was just getting ready to shoot you an email. The Heresies are going out tomorrow on my lunch break. Sorry you had to wait so long. You are bound to get some groans and moans from some here for trying to do this. However, it seems to me that as long as you wire them in SERIES -- to keep the impedence around 6 to 8 ohms nominal -- you should be fine. Here, witness one of my finest moments on the forum. Cut and past the following into your URL bar, it'll load faster. For some reason, if you just click on it, it times out. http://forums.klipsch.com/idealbb/view.asp?topicID=25925&forumID=68&catID=19&search=1&searchstring=&sessionID={BFC3565F-ACF8-44ED-9CBB-88A718973CCE} Quote Link to comment Share on other sites More sharing options...
JohnA Posted January 26, 2003 Share Posted January 26, 2003 At least check the DC resistance of the Heresies. Both sets of mine run 8 ohms DCR min., but the woofers varied through the years. My '77 and '81 models run from 10 ohms in the bass to 110 ohms in the midrange. I have a crossover mod I've designed (with lots of help) that will take out the brightness and flatten the impedance curve. Your tube amps should like that, too. If your woofers have a DCR of at least 6 ohms, 2 in parallel will be fine. I will post a schematic when I'm satisfied with it. Quote Link to comment Share on other sites More sharing options...
CaptnBob Posted January 26, 2003 Share Posted January 26, 2003 I'd stack the Heresies, with the top one upside down so the tweeters are together. You might want to put a small towel between them to minimize scratching, and attach them in some way so the top one doesn't walk off. Then I'd wire them in parallel - Heresies shouldn't provide too unreasonable a load in this configuration - and attach them to the four ohm taps on your amps. Two notes: 1.) It's important that the top Heresy in each stack be inverted. (This works even better with LaScalas!) 2.) Call Quicksilver in Reno if you have any doubts about the amps being able to handle the load. They seem to be nice folks who know what they're doing out there and they should be able to tell you if there will be any problems. Quote Link to comment Share on other sites More sharing options...
halltyler Posted January 27, 2003 Author Share Posted January 27, 2003 Thanks for the commments! Looking forward to that crossover schematic, and I was planning on that exact stacking arrangement - good to know I was thinking along the right lines. Does DC resistance vary much from heresy to heresy? Quote Link to comment Share on other sites More sharing options...
WMcD Posted January 27, 2003 Share Posted January 27, 2003 Here is everything I know about Heresy impedance. The information comes from a Dope From Hope (from Klipsch). I'd think you could wire them in parallel and hook them up to a 4 ohm tap on the amp, if there is one. Gil Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.