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Old 7th October 2011, 02:20 AM   #21
spot is offline spot  Australia
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Quote:
Originally Posted by CopperTop View Post
...
Not quite sure about the significance of the 1m... Are you then introducing a need for an anechoic chamber etc.? Or do you need a gap for a more representative free field response as opposed to the pressure response anyway?
...
If they are bolted together, they will interact and product a response which is different again from the speaker by itself. Some distance will reduce the interaction to negligible levels.
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Old 7th October 2011, 12:41 PM   #22
spot is offline spot  Australia
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Originally Posted by mickeymoose View Post
spot: now that we are off-thread google "Motional Feedback". Philips did that in the 70s! E
Ahggg, now that I've searched these forums and found the article in 1997 'Electronics World' "roaring subwoofer" I'm just going to have to build one (well something similar). Its getting a bit OT though so I'll go over to the subwoofer forum.
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Old 7th October 2011, 01:19 PM   #23
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spot: I have a pair of 8" Philips MF speakeres (new, from the 70s) you kan have them if you pay for the shipping. E
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Old 7th October 2011, 04:07 PM   #24
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1m is just the standard distance so that your curves will look like ones done by others. The actual response is 1/2 of the deviation you get. Sensitivity is a bit of a problembut can be reduced by increasing the send level. (Make it loud!)
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