10-06-2018, 11:40 AM | #1 |
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Stock HiFi amplifier
Does anyone know where I can find the specs for the stock HiFi amp?
I am trying to figure out what kind of power it puts to the under seat subwoofers. Rockford Fosgate makes some 8" shallow subwoofers that I want to try to fit. The are available in 2 ohm which is what the factory subs are. Is there any reason not to try these out, them have the option to amplify them later? |
10-08-2018, 01:19 PM | #3 | |
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If I had to guess, I'd say the 'conventional' channels are getting about 25 WPC @ 4 ohms so that the underseat drivers can get around 40 WPC @ 2 ohms to reproduce bass decently.
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10-08-2018, 10:26 PM | #4 | |
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Viffermike , do you know if I can use the technic harness to add an amp to power upgraded under seat subs? Then the sub channels on the stock amplifier would not be used? Would I encounter any issues with that? I took a shot in the dark and ordered a couple Rockford Fosgate p3 shallows 4 ohm dvc subs that I plan on running at 2 ohm for a direct replacement. I want to see how they sound on the stock amp, but will likely add an amp to power them assuming I can make them fit. |
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10-09-2018, 10:01 AM | #5 | |
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- Notice that I'm using the term 'underseat drivers'. They are NOT subwoofers in the traditional sense. They are mid-bass/bass drivers tuned to reproduce some sub-bass frequencies. Even aftermarket speakers tuned to replicate subs such as the RFs and the Earthquake SWS-8 are actually bass drivers, NOT subwoofers. - Running an amp dedicated only to the underseat drivers will create all sorts of balance and volume issues with the OEM amp's output. Why? Because there is no dedicated subwoofer channel. The HiFi system's head unit only outputs four line-level channels -- LF, RF, LR and RR -- which the OEM amp sums to create three extra speaker-level channels: the two underseat channels and the center channel. The signal that the underseat drivers get is LF and RF, and volume varies as the fader control is moved away from its '0' setting. - The biggest problem with the 2 Series Audio is clarity across the spectrum. If all you're looking for is bigger bass, the only real solution is a dedicated subwoofer, in a dedicated enclosure, with a dedicated amp and volume control. Technic's Add-an-amp harness for subs makes this possible, as I understand it. But it CANNOT work with the underseat drivers.
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10-09-2018, 10:17 AM | #6 | |
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Ahhh thank you that clears things up quite a bit. I used to dable in car audio in much simpler time. I was under the impression then the bavsound ghost subwoofer were a plug and play subwoofer that could be amplified. I assumed that I could make any other 8" shallow sub fit with some some spacers and fiddling around. Then I would just aplify them down the road. Looks like I should probably cancel that order and rethink the situation. |
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10-09-2018, 12:54 PM | #7 | |
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With that approach, the underseat drivers can be upgraded, by both hardware and power, to act more like a subwoofer. But even the Bavsound Ghosts aren't going to supply the oomph below 75 Hz or so that dedicated subs provide. The space under the seats is simply not designed for it. For most, that's OK. But if you really need low-down articulation, only a dedicated sub enclosure with proper power will provide that.
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