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peniku8 last won the day on January 14

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About peniku8

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  1. Don't think anyone here is planning to buy a 10-15k sub if he could DIY a blazing bass inferno for that money. I'm also pretty sure that M-Force is only sold to OEMs and installation companies, so if you want one you'd probably not be able to buy it directly.
  2. The 451 curve looks like a free air plot. Forgot to close the hatch? 😅
  3. peniku8


    What exactly is this setup being used for? I see no center speaker, so it's not a dedicated HT setup, but I don't really see a point in running a 32" sub in a music setup when you already have two 21s. Might sound crazy, but since the space is so big a single sealed 32" might be on the weak side if you want solid sub 10Hz (which only makes sense imo if your wood flooring allows enough flex on the concrete for TR). Also, that space screams for acoustic treatment, but it looks quite new so I guess you're in the process of setting it up? What kind of room correction are you running and how are
  4. I've recieved an answer and they suspected this phenomenon was caused by bad contact of the speaker connector on the amp. I had the amps stored on a shelf in the warehouse for a few months, so it makes sense that there was some dirt build-up and corrosion-like effects (humidity never exceeds 60% there thou, so it's only minor), since the amps were unpacked. Running a higher current through the connector seems to literally clean it, which reduced the distortion. The more you know..!
  5. Small update on the Hypex amps: according to them all amps are tested at the factory and run through a burn-in period there. I suspect that this step was skipped because the amps were on back order already (I waited 2 months to get my amps in mid 2020 due to the pandemic), but of course this is nothing but a speculation from my side right now. I voiced the same thoughts to Hypex and waiting for their take on that. Will keep you posted
  6. That's correct, but they don't actually change by much, especially at only 50W per 3KW element (which is 100W into 8R=two elements in parallel). For 4R tests that's 4 elements in parallel already, so it's only about 30W per element on the FA123.
  7. I've reported my findings to the guys at Hypex and they're looking into it now, will keep you guys updated
  8. The good thing about testing low power amps is that I don't have to fill the loadbank up with water. Random facts: It would take about 10 minutes to heat up the water in the tank to unsafe levels (beyond 60°C) at 3650W, which is the maximum power I can draw from the 230V 16A wall socket. I'd need 500KW of power input to boil the entire body of water within a single 10 second test. A full 10 second test at 5KW would heat up the water from 23°C (room temperature) to about 24°C. Heating the water to 'lukewarm' would take about 5 minutes at full available 3,6KW power i
  9. I'll be posting some measurements of the Hypex FA123 soon. I'll also update my tests to streamline the process a bit. What frequencies would ppl be most interested in? I thought of doing 1k, 60Hz for bass performance and 20Hz for sub-bass performance. I don't wanna take too many measurements, since everything multiplies so a 4 channel amp into 3 different loads with 3 different frequencies already makes 3^3=27 tests (1ch 2ch 4ch; 1khz 60hz 20hz; 8R 4R 2R). I might as well drop the 1ch measurement for 4 channel amps as an edge case like that doesn't make much sense.
  10. I'd love to test this amp with my loadbank. I'd also love to test if it'll explode being driven at max after a while like my Sanway did.
  11. 20Hz tests with 3 +10db low shelves at 50Hz which means +30db at 20Hz: -23V unclipped baseline @ 0db reference -+10db no issues, just clipping -+20db no issues, just clipping -+25db amp shuts down after a few seconds, output muted SCL engaged at 125W4R: -22V unclipped baseline @ 0db reference -nothing changes except the clipping output signal turns into a "clean" signal Master input was at +4db on the amp and I raised that to +14 for signals over 20db into clipping because I ran out of output on my interface Overdrive tests: -SCL set to amp specs (125W@4R) -Clean at
  12. Report on the soft clip limiter: test set to 25W 4R (10V in theory), generator at 1kHz -Protect light starts flickering around 11V (30W) but it won't go any higher than that (long term) -attack time was ~5ms when overdriven by 10db followed by a gradual roll off to the target over 50ms -when overdriven by 20db it stays in hard clipping for 30ms then ramps down to the target in less than 1ms -even 20db hot the target is undistorted -10Hz sinve was butchered a bit but didn't look too bad -distortion just below limiter as expected (between 0.001 and 0.003% in my sweep) -3db into
  13. What firmware version did you experience these issues with? I'll try to replicate this today with my amps running 1.44 which I updated to yesterday. I didn't quite understand your remarks about the soft clip limiter; you say it doesn't work but then you say it reduced output power, isn't that exactly what it's supposed to do? It certainly worked when I tried it, but I haven't monitored the signal so I'm not sure if it was a gain reduction (soft limiting) or a peak reduction (hard limiting). I will run a signal to the amp and loop the output back into my interface to listen back to what it's do
  14. Mine power cycled when I tried to get it to output 20V into 4R at 10Hz (FA123). The FA123 I have consists of a NC122MP, NC100HF and MP-DSP Main plus MP-DSP Digin. You can see better measurements than I could ever take of the NC252MP amp here: https://www.audiosciencereview.com/forum/index.php?threads/buckeye-6-channel-amplifier-review.18579/ I think this one is very interesting and much cheaper than combining their other offerings: https://www.hypex.nl/product/ncas500mp/174 This plus the dsp board is way less than the full FA253 (almost half the price). Dunno if it's ava
  15. I've noticed something very interesting I wouldn't have believed was true when experimenting with my Hypex amps yesterday. These amps needed to be "broken in" with a high level signal or they'll run at unusually high distortion. Sounds like snake oil to me, but heres what I've seen from the data: General info: -Sweep of the audio interface max 0.005% THD 100Hz-24khz (sweep went to 48khz) -THD somehow off rising to 1% at 20Hz (has been RMA'd once, guess it's still slightly damaged) -THD numbers in the following paragraph are mostly constant through the frequency range, so I'm picki
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