Forum upgrade to SMF 2.1.2, still working on re-theming.
Started by dimkasta, April 23, 2021, 11:05:45 AM
Quote from: edvard on April 24, 2021, 03:59:08 PMI also think what you really got was not a modding platform, but a cab, speaker, and chassis to build your own in.
Quote from: edvard on April 24, 2021, 03:59:08 PMNot sure if the SMPS or the DSP or the regulators are the source of the hiss, but I agree that any of them could be the culprit, but it also could be your speaker is an inexpensive variety better suited for hi-fi applications. The next best thing I can think of at the moment to do for that is suss out a good place to wedge in a 2nd-order low-pass filter around 5-6kHz; most guitar speakers won't go much over that, so you wouldn't be missing much high end.
Quote from: dimkasta on April 24, 2021, 04:55:47 PMAfter checking the schematic, a very convenient solution could be to replace the TDA's 47K input impedance resistor R409 with a 25K/25K voltage divider (or a pot). This will push the hiss close to the noise floor and significantly increase the SNR ratio. And as an extra benefit, the amp is going to have a much more home-friendly volume range (currently 4 is my max)I'll keep updating the first post with some progress
Quote from: flester on April 28, 2021, 09:21:37 AMWhere would the low ass filter go?