howie
Junior Member
Posts: 87 
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Post by howie on Oct 24, 2013 5:00:49 GMT -5
Everything seems to work fine but the sub has low output. I have to turn the gain/volume output to full to get anything out of it.
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Post by mastertech on Oct 24, 2013 8:43:00 GMT -5
I would first check to make sure there is no DC on the speaker wires. Are the boards marked with any identification of the connectors pins?
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Post by mastertech on Oct 24, 2013 9:20:35 GMT -5
From manual:
"The Velodyne subwoofer is designed to operate using the full range audio signal for input
when using the built-in crossover. Some processors/receivers, have a "subwoofer out" jack
that is internally filtered and designed to be used with a conventional amplifier and speaker.
In some rare cases, combining both an external crossover and the one internal to the
subwoofer may result in low output and increased noise. In these installations you may
need to bypass the internal crossover in either the processor or Velodyne subwoofer. In
some installations, simply setting one crossover to a higher frequency (such as 120 Hz) will
restore maximum performance. To bypass the subwoofer's internal crossover when the
unit is being fed a low pass signal from another crossover, simply locate the switch marked
X-over, OUT - IN
on the rear panel of the subwoofer and set to the
OUT
position. This
will eliminate the internal crossover from the signal path.
Note: If not using an external
crossover, you should use the built-in crossover for optimal performance."
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howie
Junior Member
Posts: 87
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Post by howie on Oct 24, 2013 19:04:30 GMT -5
When should there and when not should there be voltage present? The output connectors are markes + and -. Would that not indicate DC voltage? Both subs I'm working on list crossover controls differently. This one lists in and out. The other Velodyne in the other thread lists "X over and direct" I am using a single "sub out" from my avr that does go through a crossover. On this 10 I notice no difference set to in or out. The 15" in the other thread shows quite a difference (louder) when set to direct.
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Post by mastertech on Oct 24, 2013 20:05:24 GMT -5
There should never be any DC on the speaker wires. The + means signal and the - means return. Need to know which is which for phase. Since these both have internal crossovers I would be testing them with a full range pre amp signal. Does your AVR have pre amp outputs for front R and L?
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howie
Junior Member
Posts: 87
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Post by howie on Oct 25, 2013 4:57:54 GMT -5
There should never be any DC on the speaker wires. The + means signal and the - means return. Need to know which is which for phase. Since these both have internal crossovers I would be testing them with a full range pre amp signal. Does your AVR have pre amp outputs for front R and L? I think it has both L and R and dedicated sub out. Should I be testing for DC with the speaker in or out of circuit? |
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