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niss_man

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niss_man last won the day on March 2 2017

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About niss_man

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    Simon

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  1. Sounds like the power supply might be gone. That tv is well worth repairing.
  2. Thats good to hear. It seems you were getting too much room boundary/gain reinforcement. It is always a good idea to place a rear ported speaker a minimum of 30-50cm from walls. Of course this is room/speaker/WAF dependent so there are always compromises.
  3. @Ozflyer Looks like your bluesond product has basic bass/treble equalizer functionality. As this is midrange deficiency is a speaker issue, The cheapest option is to use an equaliser to increase the midrange, or in your case decrease the bass and treble a bit to make the mids more prominent. Changing cables and dacs etc will change the sonic signature and quality of sound you hear and buying a DAC with a greater midrange signature will help "to an extent" and I hope that it does if you choose this path. This is a link on how to use the Tone control funtion of bluesound products https://support1.bluesound.com/hc/en-us/articles/204636618
  4. Yep. That quasi anechoic response "Figure 5" shows a very broad dip throughout the midrange area. This is why the reviews of this speaker generally show excellent favouritism towards bass and treble areas and is what Dali were probably going for. Unfortunately this is at the demise of midrange. This is similar to a loudness button that has been inbuilt into the speaker design and would sound better at lower volume levels .
  5. A search on hifi shark might bring some luck with this matter.
  6. Check out hifiengine website. You will need to register to download manuals. https://www.hifiengine.com/manual_library/ecler/pam1000.shtml
  7. Excellent. I've subscribed. A CNC mill would have been handy when doing my Tsunami speaker build. or any build for that matter.
  8. Hi Jeff This is a typical power supply schematic I have used. This is a CRC PS. Note the extra Resistor (R1) in series between the capacitors. Dont get confused by ESR/ESR1 as these are the internal resistances of capacitors c1 /c2.
  9. I have used a CRC power supply one before in my first diy amp build. A class AB 50w design shown on diyaudio site https://www.diyaudio.com/forums/solid-state/157004-dx-blame-es-based-blameless-am-trying-amplifier.html . I have built the same amplifier again using a normal CC supply as well and couldn't hear any detriment to the sound produced. A CRC power supply isn't needed if the poweramp circuit is designed properly. You won't find many CRC power supplies attached to high power class AB amplifiers. Circuit elements such as constant current sources (plus more I will add below from "High Power Audio Amp construction" book by Randy Slone) create a very high PSRR (Power supply rejection ratio). This means that the amplifier won't be affected as much by power supply ripple (stated in the text as below the noise floor). A CRC supply would have supplied me with less current as some power is wasted through the series resistor. A CRC supply would have less ESR (equivalent series resistance) (unless I add more capacitors to the circuit which would add greater cost). Those large 100v capacitors aren't cheap. More capacitors would not have fitted in the amplifier chassis. CRC creates a lower voltage power rail for the same voltage output transformer . Places we may see CRC supplies are low power preamps/dacs or circuits that have a low PSRR, Valve amps etc. You may find some Class A amplifiers also use this as these amps have a high quiescent current (idle current) as well as most Class A amps being fairly low power. I google CRC power supply and came to this link. Please read for more info. https://www.diyaudio.com/forums/solid-state/98377-crc-power-amp-supply.html Also check out Elliot Sound Products very usefull website http://sound.whsites.net/power-supplies.htm
  10. Yes. I have too many speakers already so have decided to rescind my interest.
  11. Thanks George. Should it be tested at other frequencies as well besides 10k ?
  12. Join the facebook group "DIY Loudspeaker project pad" many great diyers and a wealth of knowledge on there. https://www.facebook.com/groups/DIYLoudspeakerProjecPad/search/?query=sb13pfc&epa=SEARCH_BOX
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