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Schematic 1.7i's for a DR x-over upgrade???

205.137.162.12

This thread goes along with the Danny Ritchie vs the Magnepan.
Does anyone have a schematic for the 1.7i?
Or the difference in cross over compared to the 1.7
I did DR RP-600 x-over upgrade and it was a vast improvement to me. I am a noob in the x-over world.
I own a pair of 1.7i's and would consider the upgrade based on my results with the 600's. I emailed Danny and his reply was that he was unfamiliar with the difference between the 2 and was reluctant to say one would work for both.
Thanks
Paul

Edits: 01/15/21

Follow Ups:

RE: Schematic 1.7i's for a DR x-over upgrade??? - Davey 19:50:43 01/15/21 (9)
I posted the 1.7 schematic on the audiocircle jerk forum quite a few years ago.
https://www.audiocircle.com/index.php?PHPSESSID=ejodcqk48dq5o3g17do9f2bc70&topic=125364.msg1327856#msg1327856
That schematic is correct. I didn't have 1.7's at the time, but I do now and have confirmed it.

For those interested in defeating the supertweeter modification it's pretty easy to do. Just clip one leg of the 10uF capacitor.
The impedance drop at high frequencies will no longer be there and it won't drop below 4.8 ohms. The tweeter is in the 1.6 configuration then.

Dave.
- https://www.audiocircle.com/index.php?PHPSESSID=ejodcqk48dq5 (Open in New Window)
- RE: Schematic 1.7i's for a DR x-over upgrade??? - Joe Schmo 10:57:43 01/16/21 (1)
  Dave, What was the before and after difference from removing the 10uF cap from the circuit? Was there a perceivable change in brightness, soundstaging, etc?
  -Joe
  
  They're not that big!
  - RE: Schematic 1.7i's for a DR x-over upgrade??? - Davey 13:11:57 01/16/21 (0)
    Yeah, there's a noticeable change. I find the speaker too bright on top normally and use a 1.5 ohm resistor in the tweeter circuit.
    With the capacitor removed I find it takes away a bit of the sizzle, but the resistor is still necessary.
    YMMV.
    
    Dave.
- RE: Schematic 1.7i's for a DR x-over upgrade??? - HappyTrails 03:19:04 01/16/21 (6)
  Davey, Thank you.
  
  But I still could only assume this was applicable to the i's.
  
  Understand I am leaning on the knowledge of others, as I am a noob but capable of following directions (sometimes!)
  
  If one peeled the skirt up on the i's would that tell others of knowledge more?
  - RE: Schematic 1.7i's for a DR x-over upgrade??? - Davey 09:19:28 01/16/21 (5)
    Are you dissatisfied with the sound of your 1.7i's??
    
    Dave.
    - RE: Schematic 1.7i's for a DR x-over upgrade??? - HappyTrails 11:41:22 01/16/21 (2)
      Davey, No. Quite happy.
      
      But if it improves on something already good then why not :)
      
      I'm a man of constant tinkering.
      - RE: Schematic 1.7i's for a DR x-over upgrade??? - Davey 13:13:05 01/16/21 (1)
        
        In Reply to: RE: Schematic 1.7i's for a DR x-over upgrade??? posted by HappyTrails on January 16, 2021 at 11:41:22
        
        Nothing wrong with tinkering, but a guy like Danny Richie would not be tinkering with any of my speakers. :)
        
        Dave.
        
        RE: Schematic 1.7i's for a DR x-over upgrade??? - HappyTrails 13:52:40 01/16/21 (0)
        
        In Reply to: RE: Schematic 1.7i's for a DR x-over upgrade??? posted by Davey on January 16, 2021 at 13:13:05
        
        But here again, a noob like myself, and the improvement DR did on my 600's I have respect.
        
        I'm open to upgraded parts.
    - RE: Schematic 1.7i's for a DR x-over upgrade??? - Shoey 10:43:21 01/16/21 (1)
      Davey why would one would want to modified the 1.7 super tweeter to revert back to 1.6 status? Curious! Thanks, Sam
      - RE: Schematic 1.7i's for a DR x-over upgrade??? - Davey 13:05:43 01/16/21 (0)
        
        In Reply to: RE: Schematic 1.7i's for a DR x-over upgrade??? posted by Shoey on January 16, 2021 at 10:43:21
        
        I don't consider it a super-tweeter because it doesn't extend any higher than it already would. It only changes the polar response of the speaker at the top end because the tweeter is now 1/4 the width.
        
        But, the main reason people might consider switching back to the "normal" configuration is the impedance drop at the top end. It drops down to 1.3 ohms. If you disable it, the impedance is 4.8 ohms minimum.
        
        Much would depend upon the power amplifier used though. Some might not have any issue with that impedance load.
        I'm not advocating one way or the other. Just mentioning that's very easy to reconfigure it.
        
        Dave.
RE: Schematic 1.7i's for a DR x-over upgrade??? - andyr 18:12:24 01/15/21 (1)
My understanding is that the difference between the 1.7 & 1.7i is not in the XO.

I have not seen a 'real' XO schematic posted here for the 1.7/1.7i; several years ago someone posted what they thought was the XO ... but it didn't work when I put it into lspCAD - so I believe they must've written it down, wrongly.

Andy
- RE: Schematic 1.7i's for a DR x-over upgrade??? - HappyTrails 02:48:43 01/16/21 (0)
  What is the difference between the 2? All I have heard was I was and stood for improved!

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