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Underwhelming output from sub

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  • Steve Lee
    replied
    YaY!

    Another satisfied customer.



    Leave a comment:


  • grampi50
    replied
    I like it, think I'll leave it...

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  • grampi50
    replied
    I just bumped up 30 hz +6 db...I'm watching a booming movie later today, we'll see what this does...

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  • grampi50
    replied
    Originally posted by Chris Roemer View Post
    I don't believe the OP is utilizing any of the EQ settings this amp is capable of.
    He's using a 12"HO sub in a sealed box, and I think his extension would benefit from some EQ (maybe +6dB @ 30Hz?).
    I've not used this amp, but if one of you who has could help him dial in some boost, I think he'd be happier.
    I don't really have any complaints with it as is, of course that doesn't mean it couldn't be better...

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  • djg
    commented on 's reply
    The amp product page has screenshots of the GUI, and this video is linked which explains accessing the DSP functions via the windows based software or the controls on the plate amp.

    The OP would want to adjust the lower frequency level via the 5 band parametric equalizer. -12 to +6db adjustment.

    https://www.youtube.com/watch?v=uLao5AhC0G0&t=35s

  • Chris Roemer
    replied
    I don't believe the OP is utilizing any of the EQ settings this amp is capable of.
    He's using a 12"HO sub in a sealed box, and I think his extension would benefit from some EQ (maybe +6dB @ 30Hz?).
    I've not used this amp, but if one of you who has could help him dial in some boost, I think he'd be happier.

    Leave a comment:


  • djg
    commented on 's reply
    The manual is quite detailed in DSP settings, very vague RE: connections.

  • Wolf
    commented on 's reply
    Most single-ended plate amps have a summing network to sum that of the left and right, so this also yields a higher input voltage.

  • billfitzmaurice
    commented on 's reply
    That's the point, both leads get the same voltage. For there to be a difference there would have to be a voltage increase. I can see how it could be done, given that the summing amp has both balanced and unbalanced inputs. One unbalanced positive could go to the balanced + leg, the other to the balanced - leg. That would double the voltage, giving 6dB gain. Nothing in the manual suggests this is the case. If it is it should be in the manual, it would have saved the OP a lot of time getting it working right.

  • Wolf
    replied
    Shouldn't isn't always right. I tell you from experience, that just Y-ing the end to both inputs makes a huge difference in output. Remember that splitting the voltage gets the same voltage to both leads.
    Wolf

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  • djg
    replied
    This particular amp maintains stereo output to the satellites. It is capable of controlling high and low pass for the sub and satellites. That's how I use mine.

    According to PE staffer Greg T. answering Q&A, a single RCA sub out should be connected to the LH input, because that side senses for the auto on function.

    All this makes me wonder if the sub inputs are actually common, but I'm just a consumer with little expertise in electronics.

    It seems to me a lot of the functions of this amp are not used with a simple sub out connection. I specifically bought this amp for a 2.1 PC setup, DAC to sub amp to satellite amp. With LXminis, preamp to sub amp to LXmini XO to 4 channel amp. My .02 cents.

    OP says it's louder with both sides connected.

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  • billfitzmaurice
    replied
    When a sub amp has L/R inputs they're parallel summed. Using both with a Y cord shouldn't sound different than just using one. The intent of L/R inputs is for when it's used with a receiver that doesn't have an LFE output but does have a tape outs that can provide it with signal.

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  • grampi50
    replied
    Originally posted by djg View Post
    Both subs I have utilize both L/R inputs. Never occurred to me that a single input would not work well. Glad to see you happy.
    This seems strange to me considering so many devices that have a sub out only have a single output. It used to be that only the left RCA input was used on sub amps. When did they start using both of them?

    Leave a comment:


  • billfitzmaurice
    replied
    Originally posted by grampi50 View Post
    I have always heard a subwoofer goes through a break-in period. I never knew if this was true or not, but after what I have witnessed with this sub, I think it's true.
    It is true, but the effect is slight, and barely audible if at all, especially with drivers that have foam or rubber surrounds. It's more pronounced with pro-sound drivers that have cloth surrounds.

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  • djg
    replied
    Both subs I have utilize both L/R inputs. Never occurred to me that a single input would not work well. Glad to see you happy.

    Leave a comment:

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