absolve2525 Posted January 2, 2015 Share Posted January 2, 2015 (edited) I received the pair of drivers that I won off Ebay. I requested that they were matched for resistance, since more than one pair was available. Both are around 12ohms. I opened up to inspect the diaphragms, and it looks like two different types! Argh! One has N 1.18 and the other has N 2.7 written on the dome with marker. Are these different thickness? I want a matched pair for home use. I've attached photos. Thanks for any input! Edited January 2, 2015 by absolve2525 Quote Link to comment Share on other sites More sharing options...
absolve2525 Posted January 2, 2015 Author Share Posted January 2, 2015 Hmmm maybe these are just production numbers rather than thickness? One is a little darker colored for some reason. Quote Link to comment Share on other sites More sharing options...
absolve2525 Posted January 3, 2015 Author Share Posted January 3, 2015 I hooked em up, both sound the same to my ear. Which is very good! I guess the differences were just cosmetic. I may end up lowering the mid level slightly, since they seem a little louder than K55M. I'm enjoying them so far! 1 Quote Link to comment Share on other sites More sharing options...
mungkiman Posted January 3, 2015 Share Posted January 3, 2015 If N is the inspector, January 18th and February 7th are the inspection dates. Quote Link to comment Share on other sites More sharing options...
Skelt Posted January 3, 2015 Share Posted January 3, 2015 There are 2 sets of numbers in the first pic. I believe one is a inspection date and the inspectors initials. The n -numbers might be the manufacture date by the machine operator Quote Link to comment Share on other sites More sharing options...
The Dude Posted January 3, 2015 Share Posted January 3, 2015 I think your fine, I don't see anything that would actually make them different. If they measure close to the same, I wouldn't worry about it. Especially if they sound fine. Quote Link to comment Share on other sites More sharing options...
absolve2525 Posted January 3, 2015 Author Share Posted January 3, 2015 Thanks for the input, guys! I knew there were some EV experts on here ☺. So far, so good! Quote Link to comment Share on other sites More sharing options...
moray james Posted January 7, 2015 Share Posted January 7, 2015 cannot believe how few DH1A fans there are. These things represent the most amazing value. They can play from 500 Hz to 20KHz and can output ten acoustical watts of sound across that band. simply sota all these years later. I am loving my brothers pair but need to find a set for myself soon. You can use them as 2" exit or remove the nose cup and use them as 1.4" exit. For those looking for a wide band driver of superb quality with a one inch screw on mount the EV DH1506 excellent. Best regards Moray James. Quote Link to comment Share on other sites More sharing options...
NBPK402 Posted January 7, 2015 Share Posted January 7, 2015 cannot believe how few DH1A fans there are. These things represent the most amazing value. They can play from 500 Hz to 20KHz and can output ten acoustical watts of sound across that band. simply sota all these years later. I am loving my brothers pair but need to find a set for myself soon. You can use them as 2" exit or remove the nose cup and use them as 1.4" exit. For those looking for a wide band driver of superb quality with a one inch screw on mount the EV DH1506 excellent. Best regards Moray James. I am very happy with mine. Quote Link to comment Share on other sites More sharing options...
djk Posted January 7, 2015 Share Posted January 7, 2015 "I hooked em up, both sound the same to my ear." Easy way to evaluate the match, hook one up out-of-phase and play noise. Face them together. The closer the match, the less you will hear. When matching up a large batch, I always clean the gap and match the Ω, then go to the noise test. 1 Quote Link to comment Share on other sites More sharing options...
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