Report "fuse holder. I've put it all together and and when i turn power on, a loud banging occurs. Seems a short is happening. When i lay the speaker face down power comes on without any issues. Upon standing the speaker upright and power is turned on the banging noise from the speakers happens. I've done some troubleshooting and looked over most of the solder joints on the board and everything seems in order. If you have any suggestions please inform me. Thanks"