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<blockquote data-quote="Rick Stansby" data-source="post: 24591" data-attributes="member: 312">Re: When L21-30 just isn&#039;t big enoughUp to now, all of our planning has been to run one amp as a sub amp, with 3 amps for the mains.&nbsp; However a few minutes ago it did occur to me that we could do Sub, Low, Mid, Hi on each amp.&nbsp; I believe that Lab told us that you can&#039;t run at 2 Ohms on channels 3 and 4 (maybe that only applies to the older PLM amps but not the 20,000).&nbsp; The only issue I can think of is the fact that each amp only has 2 inputs, and we were planning on sending Left and Right to each of the first 3 amps, to allow us to pick off the correct one (depending if the amp is running mono or stereo).&nbsp;We have considered 2 rac pacs.&nbsp; The main issue is rack space.&nbsp; 2 rac pacs take 4 rack spaces.&nbsp; There are a lot of people working together to design these racks.&nbsp; Somebody else is pretty set on 12 space racks.&nbsp; 8 spaces of amps, plus 4 spaces of rac-pac, leaves no room for the giga-switch.&nbsp; We thought we might combine the functions of two rac-pacs into one chassis, but that doesn&#039;t leave any room for pass thru jacks.&nbsp; One idea was to put 2@L21-30 inlets on a single rac-pac, and then build a bunch of L21-30 Y cords for times when you don&#039;t have 2 outlets available.</blockquote>

[QUOTE="Rick Stansby, post: 24591, member: 312"] Re: When L21-30 just isn't big enough Up to now, all of our planning has been to run one amp as a sub amp, with 3 amps for the mains. However a few minutes ago it did occur to me that we could do Sub, Low, Mid, Hi on each amp. I believe that Lab told us that you can't run at 2 Ohms on channels 3 and 4 (maybe that only applies to the older PLM amps but not the 20,000). The only issue I can think of is the fact that each amp only has 2 inputs, and we were planning on sending Left and Right to each of the first 3 amps, to allow us to pick off the correct one (depending if the amp is running mono or stereo). We have considered 2 rac pacs. The main issue is rack space. 2 rac pacs take 4 rack spaces. There are a lot of people working together to design these racks. Somebody else is pretty set on 12 space racks. 8 spaces of amps, plus 4 spaces of rac-pac, leaves no room for the giga-switch. We thought we might combine the functions of two rac-pacs into one chassis, but that doesn't leave any room for pass thru jacks. One idea was to put 2@L21-30 inlets on a single rac-pac, and then build a bunch of L21-30 Y cords for times when you don't have 2 outlets available. [/QUOTE]

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