moray james Posted August 8, 2013 Share Posted August 8, 2013 I recently picked up a pair of DH1A and I am very pleased with them. Wondering if there are other users here and if any of you have used notch filters to smooth out the impedance peaks? Does anyone have a factory graph of the impedance on a plane wave tube? I am going to uses a Karlson K-Tube on my DH1A so the plane wave tube response should be good to go with in my situation. thanks for any and all feedback. Best regards Moray James. Quote Link to comment Share on other sites More sharing options...
Coytee Posted August 8, 2013 Share Posted August 8, 2013 If that is a huge horn....Claude might have (or had) a pair. Quote Link to comment Share on other sites More sharing options...
DrWho Posted August 8, 2013 Share Posted August 8, 2013 The DH1A is actually a very good driver....I'd say it's more like the K1132 which works better at the lower end of the passband in my opinion. The DH1A really needs some EQ work to get smooth HF extension. Quote Link to comment Share on other sites More sharing options...
moray james Posted August 9, 2013 Author Share Posted August 9, 2013 Have you seen any passive networks for the DH1A? As I said I am looking to include correct notch filters and need to know what the impedance responses is. Thanks. Best regards Moray James. Quote Link to comment Share on other sites More sharing options...
DrWho Posted August 9, 2013 Share Posted August 9, 2013 No, I have not - every application of mine has been with active xovers in the system. Have you seen this?http://www.fullcompass.com/common/files/17291-dh1a.pdf Most of the EQ you need is above 5kHz, and even on the (not so great) HP9040 horn the impedance isn't affected much from the plane-wave response. You could always purchase this guy for $100 and actually measure the impedance on your horn:http://www.parts-express.com/pe/showdetl.cfm?partnumber=390-806 Quote Link to comment Share on other sites More sharing options...
moray james Posted September 11, 2013 Author Share Posted September 11, 2013 a few more questions. First have you been able to compare the 8 and 16 ohm versions of the DH1A? The overall magnitude of the 16 ohm version is lower than the 8 ohm version so I am curious about the sound difference. Since I am thinking about a two way your comment about the K1132 is very interesting could you elaborate further on the K1132 and do you have a data sheet for it? Thanks a lot for the assistance. Best regards Moray James. Quote Link to comment Share on other sites More sharing options...
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