have spent the last few days planning out and executing a sound upgrade to our car. everything was going fine up until we started and step 1 took literally 6 hours lmao
can't wait to have this finished!!! have some Progress Pics
(we stopped taking photos at about 4am when we were so tired and exhausted we just Forgot)
Day 2
can't be bothered to strip all the EXIF just yet but we're almost there. everything is wired up, no fires, etc. but we're getting some very interesting readings from our multimeter. here's our notes so far
Testing frequency response to voltages at 15/40 HU volume
OEM Sub (at the driver)
| Hz | Voltage |
|---|---|
| 20 | .501 |
| 60 | .582 |
| 80 | .191 |
| 150 | .068 |
| 250 | .022 |
| 440 | .008 |
OEM Rear left speaker (at the driver)
| Hz | Voltage |
|---|---|
| 20 | .004 |
| 60 | .067 |
| 80 | .069 |
| 150 | .111 |
| 250 | .052 |
| 440 | .144 |
At the high level input on the amp, tapped from OEM Rear left speaker near the factory amp
| Hz | Voltage |
|---|---|
| 20 | .004 |
| 60 | .058 |
| 80 | .087 |
| 150 | .117 |
| 250 | .054 |
| 440 | .151 |
At 30/40 HU volume, playing a 50hz sine wave
V=P⋅R−−−−√
150W⋅4Ω−−−−−−−−√=24.494V
Target voltage out from amp should be 24.494V
On minimum gain(5V), the amp was outputting 0.6V. On highest gain(0.2V) it was 1.374V.
The high level inputs while playing 50hz sine wave on 30/40 HU volume was:
- Right channel was 0.278V
- Left channel was 0.276V