Offset driver - Fostex 206E in Open Baffle ?

Steve M · 28th June 2004, 06:42 AM

Just a quick question, should a speaker driver mounted in an Open Baffle be mounted off-set towards the inside edge of the baffle??

Does this inside edge off-set arrangement assist with imaging like it does in multi-way speakers?

My proposed Fostex 206E Open Baffle design has a surface area of 2' x 4' x 6" wings, and I may mount a Fostex FW405 in this baffle or go Bass Reflex for full-on bass in the future.

Thanks in advance...

Regards,

Steve M.

Nuuk · 28th June 2004, 01:27 PM

The driver should be slightly offset - I don't think it matters too much if it is to the inside or outside but you can always swap the baffles over and try both!

sreten · 28th June 2004, 02:27 PM

Golden ratio - Example?

Note that due to its low Q the FE206E will have very restricted
bass before you even consider the additional baffle roll-off.

sreten.

Steve M · 28th June 2004, 03:52 PM

Thanks Nuuk & sreton, I will apply the 0.8:1 or 0.6:1 ratio for the driver offset.

Sreton: I am not expecting great bass from the 206E. From what I've read extensively on the net I don't think these type of single drivers do a lot of bass. Having heard the 206E in a 20L bass reflex box optimally loaded using WINISD, there was not any strong bass to speak of.

My intention to use this driver either in a BR box or open baffle is to enjoy it's electrostatic like imaging qualities, and the immediacy and coherence that only a point source single driver achieves. Proper and deep bass will be sorted out later either using a dipole/TL subwoofer or a properly tuned BR box of about 180L with something like the 16" 96dB Fostex FW405 woofer.

With respect to the off-set driver question, did you notice a big difference between offset vs. central mounting on the baffle, and what was the qualitative difference sound wise?

Regards,

Steve M.

28th June 2004, 06:42 AM	#1
Steve M diyAudio Member Join Date: Oct 2002 Location: Perth, Western Australia	Offset driver - Fostex 206E in Open Baffle ? Just a quick question, should a speaker driver mounted in an Open Baffle be mounted off-set towards the inside edge of the baffle?? Does this inside edge off-set arrangement assist with imaging like it does in multi-way speakers? My proposed Fostex 206E Open Baffle design has a surface area of 2' x 4' x 6" wings, and I may mount a Fostex FW405 in this baffle or go Bass Reflex for full-on bass in the future. Thanks in advance... Regards, Steve M.

28th June 2004, 01:27 PM	#2
Nuuk diyAudio Member Join Date: Feb 2003 Location: Somerset, SW England	The driver should be slightly offset - I don't think it matters too much if it is to the inside or outside but you can always swap the baffles over and try both! __________________ The truth need not be veiled, for it veils itself from the eyes of the ignorant.

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28th June 2004, 02:27 PM	#3
sreten diyAudio Member Join Date: Nov 2003 Location: Brighton UK	Golden ratio - Example? Note that due to its low Q the FE206E will have very restricted bass before you even consider the additional baffle roll-off. sreten.

28th June 2004, 03:52 PM	#4
Steve M diyAudio Member Join Date: Oct 2002 Location: Perth, Western Australia	Thanks Nuuk & sreton, I will apply the 0.8:1 or 0.6:1 ratio for the driver offset. Sreton: I am not expecting great bass from the 206E. From what I've read extensively on the net I don't think these type of single drivers do a lot of bass. Having heard the 206E in a 20L bass reflex box optimally loaded using WINISD, there was not any strong bass to speak of. My intention to use this driver either in a BR box or open baffle is to enjoy it's electrostatic like imaging qualities, and the immediacy and coherence that only a point source single driver achieves. Proper and deep bass will be sorted out later either using a dipole/TL subwoofer or a properly tuned BR box of about 180L with something like the 16" 96dB Fostex FW405 woofer. With respect to the off-set driver question, did you notice a big difference between offset vs. central mounting on the baffle, and what was the qualitative difference sound wise? Regards, Steve M.

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