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Multi-Way Conventional loudspeakers with crossovers

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Old 11th February 2013, 09:10 PM   #1
diyAudio Member
Join Date: Feb 2013
Default Uni Project build

Hi folks, just new to site so nice to meet you all

Im currently in the last 4 months of a music technology degree and plan to do a speaker modification build as my final project.

I have recently purchased a cheap set of Jamo D 365 speakers to modify, initially i wanted to build a speaker from scratch but due to restricted access to workshops this was unachievable. The plan is to take a measurement of the speakers in their original state and then take a measurement after each modification process to document the improvements or vise versa.

The type of modifications i plan to do are as follows:

Driver replacement. Was thinking of going with Fane drivers as i have tested a turbo sound system and was impressed with the results.

Building a passive crossover

replacing all wiring and connections and adding speakon connectors.

Modifying the cabinet.

Adjusting cabinet damping.

Constructing a heat sync to reduce thermal compression.

One idea i have is to counter sync the mid driver and horn load the cone driver, similar to turbo sounds mid device although this may be difficult

Anyway i was wondering if you kind folk of diyaudio could sugest other quality driver makes, websites to purchase parts and accessories and ideas that i could research to complete my project. Any advice or help would be greatly appreciated Forgot to mention i will only be modifying one speaker due to being a skint student! lol also i have a budget of around £250 thanks
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Old 11th February 2013, 10:42 PM   #2
diyAudio Member
Join Date: Feb 2002
Location: Western Sydney
download Unibox (free) to help with modelling the cabinet
download ARTA (free) & use a simple jig to help with measurement

Re: driver replacement, model the existing driver & the replacement candidate in Unibox before you do anything, replacement isn't simply a matter of swapping drivers,
& the Jamo is probably well designed in the first place...

To do well all the things you suggest would involve a considerable amount of learning, I suggest you don't be too ambitious for the time you've got...
Attached Images
File Type: jpg jig.jpg (14.0 KB, 35 views)
Impedance varies with frequency, use impedance plots of your drivers and make crossover calculations using the actual impedance of the driver at the crossover frequency

Last edited by PeteMcK; 11th February 2013 at 10:53 PM.
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Old 11th February 2013, 10:51 PM   #3
diyAudio Member
Join Date: Feb 2013
Originally Posted by PeteMcK View Post
download Unibox (free) to help with modelling the cabinet
download ARTA (free) & use a simple jig to help with measurement
Thanks PeteMcK
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