Modifications apportées à l'étape #3
Modifié par Will Hudson —
Modification approuvée par Spencer Day
- Avant
- Après
- Inchangé
Lignes de l'étape
| [title] Board Level | |
| - | [* black] Not too much to see here, Bluetooth module and its antenna, AK7755EN DAC and various power supplies and the output filters for the amplifier. |
| - | [* black] Under the heatsink lies 2 TPA3116D2's that |
| - | [* black] |
| - | [* black] The DAC also implements an aggressive compressor when on battery power. Power AT THE WOOFER on battery was 5.9V which comes to 17.5W into 2 Ohms. When plugged in voltage jumped to 9V, which at 2 ohms is 40.5W! I |
| + | [* black] Not too much to see here, Bluetooth module and its antenna, AK7755EN DAC and various power supplies and the output filters for the amplifier. A DC-DC boost converter supplies higher voltage for the amplifiers. |
| + | [* black] Under the heatsink lies 2 TPA3116D2's that I believe are running in PBTL. |
| + | [* black] Here's where it gets complicated and long-winded. The speaker has 2 operating modes. Battery and AC power, Which is a 19V 2A brick. When running on battery supply voltage bounces between 7V-10V when measured at pin 32 of the TPA's. When plugged supply voltage sits at a much more stable 12V. |
| + | [* black] The DAC also implements an aggressive compressor when on battery power. Power AT THE WOOFER on battery was 5.9V which comes to 17.5W into 2 Ohms. When plugged in voltage jumped to 9V, which at 2 ohms is 40.5W! I didn't power test the tweeter, but I'm going to guess battery is around 3W-5W and plugged in is around 10W. |