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I have a paradigm Seismic 12 sub. The other day, I turned my system on the way I usually do. I had to switch my receiver input from TV to DVD and the sound was great for about 5 seconds when all of a sudden my sub kicked in(on auto) and all it would do is produce a loud repeated thump noise. None of the other speakers are affected. I powered down the sub, disconnected the RCA input, changed the RCA cord, moved the sub to a different outlet, etc. I even tried connecting the sub to another system and it still does the same thing regardless if the sub is switched to 'on' or 'auto'. It stops thumping when I switch the sub power off. Also, it only thumps once I turn up the gain, otherwise there is no sound coming from the sub.
I am pretty sure its not my receiver. It must be the sub. Is my sub destroyed?
thanks for the help
mike
Since it still thumps i suspect the speaker is ok, but i suspect you have an electronic problem in the amp. since it is a powered sup & has the ability to auto turn on it has electronic circuits inside, take it to a service center for an estimate
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Here's the Owner's manual -> https://docs.google.com/viewer?url=https%3A%2F%2Fwww.paradigm.com%2Fdownloads%2FOM-100.pdf.
There are many ways to connect the system depending on your receiver's outputs and the speakers. Usually, the TV L/R output connects to one of the receiver's inputs. The receiver's preamp sub output goes to the powered subwoofer. The receiver's FL/C/FR/SL/SR/RL/RR speaker outputs go to the respective speakers.
PS-1200 Specifications
Design
Single driver, DCBS™ system with high velocity resistive ports and built-in amplifier
Amplifier
High current, hybrid output, 130 watts RMS
Amplifier Features
Powersaver auto-on/off, soft clipping, thermal protection
Low Pass Filter Frequency
Variable 50Hz-150Hz
Low Frequency Driver
310 mm, carbon-fiber-reinforced composite cone, Apical™ former
Low Frequency Extension
23 Hz (DIN)
Sub / Sat Phase Alignment
0 - 180
Finishes
Black Ash
Inputs
From A/V receiver/processor or Paradigm X-Series Control Unit or preamp left/right output; From receiver/amplifier speaker terminals or main/satellite speaker terminals
Weight
68 lbs. (31 kg)
Dimensions HxWxD
19.75" × 17" × 21"
(50cm × 43cm × 53cm)
Specifications are subject to change without notice.
PDR-8 Specifications
Design
Single driver, bass reflex system with critically tuned resistive port and built-in amplifier
Amplifier
High-current, discrete output, 90 watts RMS
Amplifier Features
Soft clipping, thermal protection
Frequency Response On-Axis
29Hz - 150Hz
Low Frequency Driver
210mm (8 in) extended travel with 38mm (1-1/2 in) voice-coil, aluminum former
Low Frequency Extension
29 Hz (DIN)
Finishes
Black Ash, Light Cherry, Dark Cherry
Inputs
From A/V receiver/processor or Paradigm X-Series Subwoofer Control Unit mono-sub out or preamp left/right output;From receiver/amplifier speaker terminals or main/satellite speaker terminals
Weight
25 lbs. (11 kg)
Dimensions HxWxD
13.25" × 9.75" × 15"
(34cm × 25cm × 38cm)
Specifications are subject to change without notice.
First try to find the source of your problem. The easiest way would be to try your sub with a different audio source to see if the problem still occurs but is sounds more like there's a problem with the receiver.
You either have a bad ground from your amp to the vehicle or a problem with the amp. Where is the amp grounded? Do not ground an amp to a seat bolt or side panel on any vehicle. The weld points on the car itself cause issue with ground. Take the ground wire directly thru the bottom panel (floor) Check befor you drill! don't hit a wire/fuel line, etc. That will give you a solid ground. Keep your ground wire length to a minimum. 18" or less, and use the same gauge wire for ground as you do for power. Hope this helps
An electronic roll-a-long switch for use in a seismic exploration system and method of seismic exploration are disclosed. For a group of N sequentially numbered receiver points, N/2 input channels are provided. Each input channel receives input from one of two receiver points which are spaced N/2 receiver points apart. The input channels are multiplexed to a data bus in an order corresponding to the sequential numbers of the receiver points comprising the input channels. :D
Ive seen this problem in alot of audio setups in vehicles but most peeps dont know this is not a good thing and will cause damage to your woofers or amp. 99% of the time it turns out to be as you said
that bad boy muting circuit. alot of these curcuits do use separate transitors or diodes as mute switches but most of them are directly from the Microproccessor. Only way to trouble shoot this is with a schematic and a good car stereo tech. Good luck
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