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About Steffen

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  1. I don't think there is much to be gained from fixing the amp, it looks like a cheap piece of junk. The driver and cabinet on the other hand seem to deserve better than being scrapped. But maybe that's just the hoarder in me...
  2. I've got a Wharfedale Powercube 12A that is overall in very good shape, and the driver looks pristine. However, the plate amp is broken. I'm considering what to do with it. One option (the expensive one) would be buying something like the Dayton DSP250 plate amp, which seems to fit. Other options include using it as a passive sub (I'd have to make a crossover for it), or just using the 12" driver in a DIY sub. I kind of like the idea of making my own, because I could make it sealed, which I much prefer. On the other hand, I haven't done this before and have no idea what I'd be getting into. What would you do?
  3. Is the WiFi reception marginal perhaps? You wouldn't expect an error message like this if that was the case, but you never know... Can the issue be triggered by running the microwave?
  4. Sounds like a bug. Are you running the latest firmware on the audio system? https://au.yamaha.com/en/support/updates/crx-n560_crx-n560d_mcr-n560_mcr-n560d.html
  5. Forgot to add, your room layout is reasonably complex and hard to predict, and if you did REW measurements you'd be presented with a perplexing set of results. Experimentation is going to be most promising, I reckon. I'd start by moving the speakers away from the front wall about at least a meter. That may not be an acceptable final position, but it should have some audible result, and tell you whether this is the sort of problem at play with your setup. There is also a possibility of the two front speakers interacting and conspiring to kill bass. This can be tested by changing the distance between the speakers (in 5-10cm steps) and their toe-in.
  6. Is that 15cm from the front baffle of the speakers (where the bass driver is) or the back of the speaker (facing the wall)? You need to measure from the centre of the bass driver. You can predict the frequencies affected by SBIR extinction by calculating 343/(d*4), with d being the distance to the reflective wall/floor in meters. The SBIR effect drops off with increasing distance to the wall, since the energy of the reflected sound wave decreases with the square of the distance travelled, which is why ceilings are not usually implicated. Please don't ask me how to measure the distance with rear-ported speakers
  7. Toslink and even coax transport-to-DAC links can be riddled with issues, because they often feed the bit stream – in real-time! – straight into the DAC, so things like timing jitter, pulse width and edge rise times come to bear in full force. This is because D/A conversion is an entirely analog process, with the analog quantity being the time between pulse edges. The data stream, that was impervious to considerations like this, suddenly becomes an analog signal upon hitting the DAC. The only way to control this is for the DAC to store a sufficient number of words (16 bits, 24 bits or whatever it operates on) ahead of time in its own buffer, and fetch them from there for conversion to the beat of its own clock signal. This will diminish any timing and edge rise issues that the bit stream may have suffered during transmission to the DAC. Oh, and as the cited articles mention, it needs its own pristine power supply, away from the nasties of any digital circuitry, because in order to synthesise analog output voltages it must rely on a stable reference voltage.
  8. Yes. The beauty of digital though is that these things (leaving out functionality for a moment) only matter at the time and location of D/A conversion. Unlike with an analog signal, it doesn't matter whether the bits have travelled far, over slow, fast, optical or radio links, have been stored to disk or buffered in RAM – as long as they don't get lost in transit (in which case they will usually be resent) they will always be as fresh and authentic as when they were conceived. Jitter, timing, noise, etc. are not properties of the digital bit stream, they are properties of the environment in which the DAC operates.
  9. Some steamers and DACs appear to measure better than others, and I'm sure some of those differences will be audible. Typically (but not always), the more expensive ones will sound better than the cheap ones. However, the differences will be slight, and if I had $1000 to spare I'd invest them in room treatment rather than a streamer or DAC upgrade.
  10. Well, 150-300Hz is still SBIR country, we're talking somewhere between 20cm and 60cm here. Are the side or front walls, or the floor, in that sort of distance range from the bass drivers?
  11. The 800S is actually $1,635.30 right now at David Jones. They've got some "10% off only today" thing going.
  12. It could be a cross-over cable, which used to be common for host-to-host connections (as opposed to host-to-switch). These days most Ethernets ports are auto-polarity, so cross-over cables are rarely required. If the plugs are see-through you can tell by holding them side by side, clip down and facing the same way, and compare the colours of the leads. If they are in identical order then the cable is straight through, otherwise likely cross-over.
  13. They just get added up. Perhaps one of the pre-out or subwoofer input sockets is hooked up wrong? Or maybe one of the RCA or XLR cables? The latter would be easy to verify with a multimeter. This would be highly uncommon, I've never seen that before (except with DIY stuff ). Perhaps the selector switch is on XLR and you're using the RCA inputs (or the other way around)?
  14. Sounds like left and right are out of phase? The deep bass is mostly monaural, so two channels of opposite polarity would cancel each other out.
  15. A wire connected only at one end might me intended as a shield, but a single wire, just running alongside the signal lead without being twisted, will provide very weak shielding. Now, with speaker cables, shielding is not required. If it were, you'd be dealing with some very high energy fields to have any effect on a low-Ohm load.
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