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<blockquote data-quote="Guy Graham" data-source="post: 92100" data-attributes="member: 1944">Re: Cardioid Subs in a Smaller venue.With the B4 being (if memory serves correctly) a box passively driven, it only uses one amp channel and relys on the difference between the direct radiating front speaker and the smaller rear bandpass-type loaded speaker to achieve its cardioid character, as does the V and Vi Sub and I&#039;m sure some various others also.Hence you can&#039;t &quot;throw cardioid out the window&quot; with those type of boxes. However my query is (as I&#039;ve not enough experience with these boxes, nor chance to experiment as yet) when you do want to get &quot;in your face bass&quot; and don&#039;t have old C-type normal boxes available (plus also may want to stretch your D12s to get the most sound out front possible), can you deploy subs like the two big J series boxes, and simply short the rear-firing speaker whilst connecting up the two front 18s/21s, if you were in a pinch and that was all inventory allowed?I appreciate the situation is very convoluted and unlikely to happen in real life, if one already has such good quality kit available.&nbsp; But I&#039;m curious to know if actively-driven cardioid designs like the d&amp;b J series subs could be used with little or no ill effects, in a situation where D12 amp channels were urgently needed elsewhere so as to cause the operator to not connect up the rear-firing driver, but still give power to the front-firing speakers. Would this design of sub still perform to a standard closely resembling the spec? Or is the design inherently compromised by not fully connecting it up, and so performance is then compromised by not powering each driver in the box as designed?</blockquote>

[QUOTE="Guy Graham, post: 92100, member: 1944"] Re: Cardioid Subs in a Smaller venue. With the B4 being (if memory serves correctly) a box passively driven, it only uses one amp channel and relys on the difference between the direct radiating front speaker and the smaller rear bandpass-type loaded speaker to achieve its cardioid character, as does the V and Vi Sub and I'm sure some various others also. Hence you can't "throw cardioid out the window" with those type of boxes. However my query is (as I've not enough experience with these boxes, nor chance to experiment as yet) when you do want to get "in your face bass" and don't have old C-type normal boxes available (plus also may want to stretch your D12s to get the most sound out front possible), can you deploy subs like the two big J series boxes, and simply short the rear-firing speaker whilst connecting up the two front 18s/21s, if you were in a pinch and that was all inventory allowed? I appreciate the situation is very convoluted and unlikely to happen in real life, if one already has such good quality kit available. But I'm curious to know if actively-driven cardioid designs like the d&b J series subs could be used with little or no ill effects, in a situation where D12 amp channels were urgently needed elsewhere so as to cause the operator to not connect up the rear-firing driver, but still give power to the front-firing speakers. Would this design of sub still perform to a standard closely resembling the spec? Or is the design inherently compromised by not fully connecting it up, and so performance is then compromised by not powering each driver in the box as designed? [/QUOTE]

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