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Yeah, easy mistake but you are missing the issue. It's not related to time alignment that is done to compensate for speaker distances. It's just an intrinsic delay that a DSP adds. That is, the DSP can't modify the sound coming through it without taking some slight amount of time to do...

For what it's worth, the extra delay that gets added by my DSP's processing renders the hands-free phone function useless for me anyway. The phone audio sounds fine to me, but the echo cancellation built into the headunit gets totally messed up by the extra delay and causes the sound the...

You're welcome! Glad to help Actually no, those measurements weren't of sound from the speakers - they were the signal on the wire. It's pretty easy: You just unplug the speaker, plug its connector into your sound card, and then use REW like normal. You just have to turn the volume...

Yeah, that is essentially what I did, except with sine wave tones instead of pink noise: I put the 500Hz tone in the left channel only for all test tracks to use as reference point for measuring volume differences in the 1KHz tone.. In the top two images you can see that, with a track that is...

That's one option, but it will continue messing up your imaging since L+R is not a suitable method for deriving a center channel from stereo. I've never tried this, but I think you could rig up a relay on one of the two wires from the factory amp to the center speaker such that when you turned...

With DTS Neural turned off, the center is just a simple sum of everything from the left and right channel. So if you mix the center back into your left and right, you will end up with an almost mono signal going to each speaker. With DTS Neural turned on, the center is only sounds that are...

I've been considering putting speakers in the rear doors of my sedan but would want it to look as OEM as possible. I couldn't find any clear info online whether the hatchback rear door panels would fit. I knew they were different part numbers, but the shape looked REALLY close in pics on eBay...

Not really. The only risk would be if the factory amp sent your tweeter a frequency low enough to damage it, and there's just no chance that the crappy factory tweeter is more robust than your JL tweeter. Also, above are measurements I took of the amp's output for the sub, mid, and tweeter...

Yes and no. The front door mids do get sound all the way from 20Hz to 20KHz, but it is not flat. So they are a suitable input source for a DSP, which will let you correct that non-flatness, but they would not be an advisable input source for your crossovers. The factory amp has already...

I ordered the "with factory amplifier" option, but it arrived set to "GuanDao", "2017-2020" and my volume was low. Switching it to "GuanDao", "2017-2020 HIGH.AMP" brought the volume up to a better level. But, I later noticed that in the backup camera view, I didn't have the buttons for...

Good work on researching that so thoroughly. I'm not too surprised that that's what you ultimately found. Since the majority of Civics don't have a factory amp, I think the number of people out there who would be willing to pay for such an item are too low to justify the cost of developing it.

For cars without XM, the antenna is embedded in the glass of the back window:

I think all the speakers get the same amount of power, actually. Or, at least, have identical amplifier circuitry driving them. I think the subwoofer has a lower nominal impedance, so it could be getting more power from the same circuitry. I'm not 100% sure on that, but think about it - the...

Jump-starting a car is really just starting a car with another car's battery, so the same voltage as a normal car battery should theoretically be enough, and that's usually 12.2 to 12.6 volts. But, there's some voltage loss in the jumper cables and the alligator clamp connections, so higher is...

Actually, I think I spoke too soon - from this thread, it looks like the CTKPHD02 may well allow re-using the Honda amp with an aftermarket headunit. It looks like it might be only sold in the UK, though.

Oh, I see what you mean now - like maybe that little box shown in the pic gets mounted up behind your aftermarket headunit and it turns the new headunit's analog output into digital and feeds it into the original SPDIF plug than runs down to the amp. Interesting. The antenna adapter at the...

The one that goes into the head unit is a double, true. My only guess is to keep you from being able to accidentally plug it into the spots where the terrestrial and satellite antennas go, since they use similar single connectors. But if the goal is to get rid of the factory headunit and keep...

Yeah, the amp wire diagram you have there is incomplete. Here is the full documentation of all the connectors on the amp for 10-speaker cars:

The connector that goes into the amp isn't a double like that one. though:

No This is a common misconception actually. The factory amp in the 10-speaker cars has 10 outputs, not 8. The two for the rear tweeters are on a separate connector from all the other speakers' outputs so people often overlook them.