Jamo D830 (Concert 8) crossover - diyAudio
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Old 23rd November 2004, 08:57 PM   #1
Eccu is offline Eccu  Finland
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Default Jamo D830 (Concert 8) crossover

Few years ago I build Seas based speakers. (T25-001 and W17E-002). Speakers was my own design, even filter.

I was quite satisfied speakers sound to the moment when I get chance to listen original Jamo Concert 8 speakers. After that I was not satisfied anymore

So my question is that, does anybody have Jamo Concert 8 (Jamo D830) crossover schematic?

I have seen some pictures taken from that crossover board, but component values are not clear to me.

Picture shows how components are placed to board.
Red are capacitors, white are resistor and black circles are coils.
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Old 27th November 2008, 03:14 PM   #2
gastalt is offline gastalt  Italy
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Hi I'm Ivan and I have the same problem of you, I have woofer and tweeter seas excel (the same of Jamo D830) and I wish to built the speakers so if you have some solution (crossover anb specification of bass reflex port) could you send to my e-mail.

Thank You
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Old 27th November 2008, 10:34 PM   #3
dlr is offline dlr  United States
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I have the D830 I bought on sale to use the boxes and possibly the tweeter. However, with the exception of the limited bass extension, I found that I like the drivers once a good crossover was in place.

I've wanted to add a page to my site detailing the re-design, but have not had time. Some time over the next few days I'll see if I can do a quick-n-dirty page to show the original crossover and mine. It's roughly a 1900Hz LR4 with trap for the woofer breakup.

I also added some stuffing to the box in a trial-and-error method because I don't care for ported systems. The result is something of a highly damped ported system. I can't even say what the actual tuning is, I just worked on that until I liked the sound.

The woofers are the 4-ohm version, so my crossover won't work with the standard 8-ohm version.

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Old 6th February 2009, 02:20 PM   #4
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I have the service manual for these great speakers.
I think the drivers was made special for Jamo, both drive have 4 ohm I donít know the exact Seas series but I know are Excel series T25?? And w17??.
If someone need the schematic please send me a message on PM with the email address
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Old 5th April 2009, 03:27 PM   #5
mdb502 is offline mdb502  Chile
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Hello gabrielbecheanu,

I have several new parts of Jamo speakers and I cannot find the service manual to see which boxes they are.

If you have the manuals, you could tell me which series speakers are and what crossover to use (number or schematic)?

These are tweeter with the same appearance:

These are woofer with the same appearance:

This marked a woofer of 4 ohms, with apparently equal to the above:

If any other member of the forum has this information, we will stay very grateful if I can provide.

Thank you very much,
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Old 5th April 2009, 08:15 PM   #6
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These are the series of speakers from the service manual
For tweeter is 20531
For woofer is 20525

Some one tells me that is almost impossible to buy those speakers from the market. These are available only on service replacement. Seas made these speakers especially for Jamo.
If you want the service manual send me an email
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Old 6th April 2009, 04:29 PM   #7
mdb502 is offline mdb502  Chile
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Thanks gabrielbecheanu for your reply.

I would like if you can send me the manual, unfortunately I cannot see your mail to send a message because my account is under moderation. If you can go to my profile, there is my mail.

Do you have the manual E8 Series (E850 and E870) where appear the number part of speakers and schematic of the crossover to use?

Best regards,
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Old 12th January 2010, 02:42 PM   #8
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Default jamo concert 11 woofer


Por favor , me podrias enviar la especificaciones del woofer excel que tiene la concert 11, Gracias
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Old 12th January 2010, 02:48 PM   #9
Pano is offline Pano  United States
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ogshhile, welcome to the forum.

This is an English language forum so you will get better responses if you post in English. Thanks!
Take the Speaker Voltage Test!
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Old 8th May 2010, 08:44 PM   #10
Lokker is offline Lokker  Belarus
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Think its help
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