yes ! love to read that. 
and thanks for the input Jim!

pete

On Feb 20, 2012, at 8:51 PM, Casey Rice wrote:

> I'd like to read your article Jim.  Please let us know if you find it.
> 
> Cheers
> 
> Casey
> 
> 
> On 21/02/2012, at 11:11 AM, Jim wrote:
> 
>> Hi Pete,
>> 
>> I can't really add anything specific regarding interface with a 3C, however 
>> I have a good deal of experience with subs. First off is that a significant 
>> benefit of the sub is to unburden the main speakers (and amp to a somewhat 
>> lesser degree) of the reproduction of the lowest frequencies. This will 
>> reduce the IMD (Inter Modulation Distortion) component and can really clean 
>> up the sound. So use an outboard cross over to relieve the mains from this 
>> load.
>> 
>>  A few other thoughts (in no particular order) are: the built in crossovers 
>> in most subs are a pretty weak point. I ended up bypassing that part of my 
>> Velodyne UDL 18 and it really helped. They tend to use a very simple, 
>> minimum parts count circuit in this position. Next, you can really optimize 
>> the blend of the sub with the mains (this can be difficult to end up with a 
>> "seamless" transition) by adjusting not only the cross over point, but the 
>> steepness  of slope on both sides and the relative gains.
>> 
>>  A simple way to set the sub gain without any test gear is to start with it 
>> at zero, gradually have your helper bring it up while you sit in the "sweet 
>> spot" till you just notice it; then turn it down a bit. That's likely a good 
>> starting point. Try to find the specs on your mains and find where the low F 
>> response starts to drop off; this will help you to establish the cross over 
>> point.
>> 
>> I have an article I wrote on sub woofer integration a few years back; if I 
>> can find it, I'd be glad to pass it on. However, I think it ended up 
>> archived on a computer I can't get to right now. If you have any specific 
>> questions, I'll be glad to try to answer them. Best of luck!
>> 
>> Regards, Jim
>> 
>> 
>> 
>> On 2/20/2012 1:33 PM, pete wrote:
>>> quick question for the list...
>>> 
>>> i have a cheap-o active sub i'd like to integrate into my series IIIc here 
>>> (just to get a basic idea of subsonic junk going on in mixes) and am 
>>> wondering the best and or easiest way to go forward.
>>> adding the sub in parallel with say the speaker A outs (on which there is a 
>>> set of active Dynaudio bm6a) effectively lowering the input imp. seen by 
>>> the master module i take it is not the way to go....
>>> my initial thought is to take a line out of the 2-mix #3 in the patchbay 
>>> and send that to the sub... i really wanted to be able to switch it out 
>>> though when i am on the smaller avantone monitors on speaker select A.
>>> 
>>> any tips from people using subs on their older neotek setups?
>>> 
>>> thanks!!
>>> 
>>> pete------
>>> 
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>>> 
>>> Thanks.
>>> 
>> ------
>> 
>> View the list online at: http://www.mail-archive.com/[email protected]
>> 
>> You can unsubscribe at anytime by sending an email to 
>> mailto:[email protected] with "unsubscribe neotek" in the message 
>> body. If you have any difficulties, or questions --please send an email to 
>> mailto:[email protected].
>> 
>> The Neotek list is lovingly hosted by Catapult Web. Remember that any 
>> message or reply sent to the list will be automatically forwarded to all 
>> subscribers.
>> 
>> Vive Le Neotek!
>> 
>> Thanks.
> 
> Casey Rice
> PO Box 423
> Yarraville VIC 3013
> +61 4 2367 2340
> 

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