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Reference Theatre LCR Build Crossover  


Spiral
(@spiral)
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Hi Toid,

Trust you are keeping well and staying safe.

I am working on Reference LCR build 115dB+... Taking home theatre out of HiFi and into Pro-Audio realm. The center channel is measuring well. I do believe the crossover can be further refined.

Below is the link to dxo file, would love to get your expert opinion on it:

<a href=" removed link " target="true">Crossover_Design_14-DEC-20v11.dxo

Needless to say I am a big fan of your videos. A big thank you for all your efforts in making the videos and sharing with the community.

Let me know what you think of the crossover.

Regards,

Spiral

 


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123Toid
(@123toid)
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Joined: 3 years ago
Posts: 1181
 

@spiral

Since you are new it won't let you post links.  However, I do believe you can post attachments or just PM me the link and I'll edit it and look at it.  But as of now, I can't see the link.

https://www.youtube.com/123toid


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Spiral
(@spiral)
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Joined: 1 month ago
Posts: 3
Topic starter  

@123toid done I have sent you in PM


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123Toid
(@123toid)
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Joined: 3 years ago
Posts: 1181
 

@spiral

Thanks I got it I'll repost and look at it tonight

https://www.youtube.com/123toid


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123Toid
(@123toid)
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Joined: 3 years ago
Posts: 1181
 

There are a few concerns.  The first is the impedance is really low (around 3ohms and as low as 2.5ohms).  What do you have push that?  You are going to need a really high end amplifier to push that low of impedance, especially at movie levels.  I also noticed there are no offsets.  Are these manufacturers graphs or your own measurements? Without proper offsets, this crossover won't work as intended. 

https://www.youtube.com/123toid


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Spiral
(@spiral)
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Joined: 1 month ago
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Topic starter  

Thanks for the valuable feedback Toid! Yes I am powering these speakers with a very beefy external Emotiva amplifier so not really concerned on the drop in impedance. Also considering bi-amping the highs and lows separately same amp.

The subject of offset is tricky as you rightfully put it, I have checked both the manufactures graphs and my own measurements (the file shared with you included the manufacturers measurements).

Although, I wanted to get the crossover in the ballpark, build the enclosure and then take measurements - to fine tune the crossover as needed. This will take slightly longer and add to the cost but its ok.  

I just wanted to check with you if the 'ballpark' is decent as a starter. I should have the enclosures and components ready in another week or two, will share the graphs. 


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123Toid
(@123toid)
Illustrious Member Admin
Joined: 3 years ago
Posts: 1181
 

@spiral

If that is the case, you definitely look like you are on the right path.  I look forward to seeing it progress.

https://www.youtube.com/123toid


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Newegg

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