Guest Squeaky Posted July 21, 2005 Posted July 21, 2005 I have a question....obviously... I used d&b c4 tops and subs in a production recently, I have to write all about it for my coursework...*sigh* I want to know what pin does what, I think its gonna be like 1&2 mid high 3&4 sub and then the 5th, which im told is a data connection which tells the amps what speaker is connected etc. could someone please verify it if you know, cos its gettin on my tits and I need to kno... thanks in advance... phil. :)
gareth Posted July 21, 2005 Posted July 21, 2005 It's just taken me literally two minutes to Google the d&b Audiotechnik website, click through to it, find the list of manuals available for download, load up the C4 manual, and locate the connector pin-out information on page 4. Why don't you try doing that, instead of asking other people to do your research for you? :)
BlueShift Posted July 21, 2005 Posted July 21, 2005 I have a question....obviously... I used d&b c4 tops and subs in a production recently, I have to write all about it for my coursework...*sigh* I want to know what pin does what, I think its gonna be like 1&2 mid high 3&4 sub and then the 5th, which im told is a data connection which tells the amps what speaker is connected etc. could someone please verify it if you know, cos its gettin on my tits and I need to kno... thanks in advance... phil. :)<{POST_SNAPBACK}> The d&b system works using either nl4 or ep5 connectors and basically it works with pins 1&2 tops, pins 3&4 subs (using either connector, on the system you describe). pin 5 (only available on ep5) is used for the sensedrive feature of the d&b amps. The sensedrive feature, in a nutshell, works with d&b subwoofers to compensate for the increase in impedance of the load caused by, for example, a long cable run between amp and speaker. It effectivly does this by using pin 5 to measure voltage at the speaker and by comparing that with the driving power being supplied by the amp can figure out the exact impedance of the load at any point in time. It is a little more involved in reality, but the point is to ensure that your 8 ohm sub is being driven at 8ohms (or whatever its impedance may be) and is not losing current to cable impedance. And as every superhero knows, subs need to move a fair chunk of air - and they do this better when their impedance is as low as possible (as close to the rated value as possible). So basically your sensedrive means that your sub is being driven optimally at all times bu adjusting the output of the amplifier to match the actual impedance of the load at any point in time Cheers
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