FormLabs has some resolutions for 2015 and they have made a fully 3d printable speaker project made from resins with different properties. Key resin property for the speaker is flexibility. Improved resolution and optimized support systems help also.
You can learn more at:
http://formlabs.com/en/company/blog/2015/01/06/new-year-new-resolution/
Here is the SLA printed DIY speaker developed by Adam Lebovitz made with various resins:
You can learn more at:
http://formlabs.com/en/company/blog/2015/01/06/new-year-new-resolution/
Here is the SLA printed DIY speaker developed by Adam Lebovitz made with various resins: