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<blockquote data-quote="kingsxman" data-source="post: 1314415" data-attributes="member: 563735">I just bought an older Lanzar SL800D optidrive off ebay. 500w @ 2 ohm, 800w @ 1 ohm.&nbsp; Just hooked it up tonight and am getting some very loud low frequency noise out of 1 of the channels.THis is supposedly an mono block amp, yet it has 4 inputs.&nbsp; It also has 2 sets of speaker outputs.&nbsp; When I plug 2 inputs into 1 and 2...I get the noise. I mean..the amp is unusable at that point.&nbsp; It seems to be mainly input 2.&nbsp;&nbsp; On inputs 3 and 4 its ok.&nbsp;&nbsp; I&#039;m not sure if i need to use both sets of inputs to get full power out&nbsp; of the thing.&nbsp; THe manual does say..&quot;use either signal source-using BOTH will not damage the amplifier&quot;.&nbsp; So that makes me think that I can run a set of RCA&#039;s&nbsp; to either 1-2 or 3-4 and be ok.&nbsp;&nbsp; What I dont know is if I&#039;m getting full power by not running into all 3.On the speakers outs...heres another weird thing: In the book it lists that to run a single sub...use the + terminals off BOTH sets of outputs.&nbsp; WTF? I tried it and of course I get nothing...&nbsp; When I hook up 1 positive on one set and the negative on the other channel...it works.&nbsp; That seems to me to be the proper way to run it.I&#039;m not sure if i should just send the thing back and get my money back (only paid $120 for it) or just try and run it using inputs 3-4.&nbsp; I&#039;m planning on running a pair of 10&quot; JL 10w6v2&#039;s off it @ 1 ohm.&nbsp; Right now I&#039;ve got 1 hooked up at 2 ohms and it sounds ok.Suggestions?&nbsp; Is that 2nd channel blown?</blockquote>

[QUOTE="kingsxman, post: 1314415, member: 563735"] I just bought an older Lanzar SL800D optidrive off ebay. 500w @ 2 ohm, 800w @ 1 ohm. Just hooked it up tonight and am getting some very loud low frequency noise out of 1 of the channels. THis is supposedly an mono block amp, yet it has 4 inputs. It also has 2 sets of speaker outputs. When I plug 2 inputs into 1 and 2...I get the noise. I mean..the amp is unusable at that point. It seems to be mainly input 2. On inputs 3 and 4 its ok. I'm not sure if i need to use both sets of inputs to get full power out of the thing. THe manual does say.."use either signal source-using BOTH will not damage the amplifier". So that makes me think that I can run a set of RCA's to either 1-2 or 3-4 and be ok. What I dont know is if I'm getting full power by not running into all 3. On the speakers outs...heres another weird thing: In the book it lists that to run a single sub...use the + terminals off BOTH sets of outputs. WTF? I tried it and of course I get nothing... When I hook up 1 positive on one set and the negative on the other channel...it works. That seems to me to be the proper way to run it. I'm not sure if i should just send the thing back and get my money back (only paid $120 for it) or just try and run it using inputs 3-4. I'm planning on running a pair of 10" JL 10w6v2's off it @ 1 ohm. Right now I've got 1 hooked up at 2 ohms and it sounds ok. Suggestions? Is that 2nd channel blown? [/QUOTE]

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