View Full Version : Is there a drop in replacement for D260
03-20-2009, 11:54 PM
I haven't been very active in DIY for many years, but got the inch again when I was going thru my stuff in the basement and ran across 4 Dynaudio 15w75-08. I got rid of all my measurement gear and such so I figured I'd ease my way back in by following an online kit. The gemini seems the most logical, or Dennis Murphy's modified XO. Hence my question, any drop in replacement for the D260, or another plan I could follow that uses the 15w75-08?
03-23-2009, 05:28 AM
I have used the D260, so I have some idea about their characteristics. I have measurements that were taken on 12" wide baffle with large radius corners. There is a couple dB suck out around 4 - 7kHz, then a small peak centered just above 10kHz. I can't say if other D260s have the same issues or not. I wonder if it may be a production variation that is shown in the ones I am using.
Judging by the datasheet for the D260, the response has a resemblence to the Seas 27TDFC. But the impedance of the Seas is lower at 6ohm. If you add a 1.5 ohm resistor on the the Seas 27TDFC and have some luck it might come out with sensitivity and impedance to match the D260. If using Dennis M's revised Gemini xo that has 10ohms in parrallel with the driver it might not be very sensitive to the different shape of the impedance curve. I guess you should decide for yourself if you want to take the chance or not. I wonder if DM himself could offer some advice.
Long ago I read it was suggested that the Morel MDT-33 shares some technology of the D260. There are some differences, so it isn't going to be a perfect drop in replacement. The appearance and front dimensions are possibly the same, but I can't be sure because I only have a low resolution scan of the datasheet. If the datasheets can be believed, the MDT-33 has a superior and flatter response than the D260. It might also be workable with DM's revised crossover, but again you would need to adjust the resistor values to bring the MDT-33 down by a coule of dB. It may also need some tuning of the tweeter network capacitor value. If you don't mind to spend the time and money on the Morel MDT-33, I think it would be workable.
Does anyone else have an opinion about this?
09-19-2009, 06:53 PM
not sure if you ever got an answer to your question. i was searching for gemini since i am interested in selling my custom crossovers for the gemini which were built by phil at bamberg engineering sound lab. however, i believe dynavox may have something similar. here is a link.
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