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stereo coffee

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  1. Hi Andy The drivers have inductance of 0.15mH each, allowing there will be added inductance and capacitance in your crossover components. all serving purpose . https://madisoundspeakerstore.com/approx-6-7-woofers-satori/satori-6-mw16tx-4-textreme-cone-woofer-4-ohm/ The attached schematic, shows the typical amplifier end Zobel which is 10 ohms and 100nf of capacitance, + on some amps also an inductor, the speaker end Zobel as described in Batemans article is to the left. You will need the 100 ohm resistor to be non inductive and rated at 5 watts or more. For t
  2. A very wise move, learning about sensitivity and ohms. I have provided some insight into it in the thread attached . In a nutshell consumer line level which CD manufacturers and streaming services abide by see's 0.316V RMS as the upper limit of output at such sources. Peak level can be up to 0.894V https://en.wikipedia.org/wiki/Line_level This does not stop some manufacturers of some naughty DAC's providing ability to select more gain, but for general CD players playing commercial CD's and streaming services, they all abide by consumer line level. Since most g
  3. AKG701 is a very comfortable headphone and gets good reviews. i have a pair, and can speak highly of them for their sound quality and comfort. https://www.earbudszone.com/akg-k701-review/
  4. @dbastin'Feel free to post your personal experience with any ground product listed, eg. you upgraded to one of these listed' What if a product is not listed, can it be commented on ? . Sadly the thread IMO seems to be a self serving thread not invitational to learning from other important resources. Could you enlighten please if it indeed restricts comment of other products, per the outline quoted above from your first post.
  5. Could be one speaker is wired out of phase, check both your speaker wiring, which is usually red from amplifier to red on speaker and black on amp to black on speaker for each channel. Noting some amps are phase inverting despite providing the same color binding posts, which might need some research, here is a good spot to do that, or write to the amplifier manufacturer https://www.hifiengine.com/manual-library.shtml
  6. Priorities might be a bit wrong there, SQ usually ends up always being what one wants. But you can have both with a bit of effort. I would rebuild a Quad 33 as you know what , and source a FM 3 tuner housing each in the stylish wooden sleeve. For speakers there is nothing more retro than the 57's and for power amp(s) the Quads 303 is excellent with 57's, as are well designed valve amps due to the 57's impedance being mainly high, ( all over the place really ) but only dipping at highest frequencies.
  7. The board supplied to Mahdi was at no cost to him, including its postage, as a sample of the latest ideas for LDR's.
  8. A Quad 303, used a 67v + regulated supply, the 8v of difference higher would be ideal as headroom to run at 67V+ Amplifier boards and parts are readily available online via ebay. A schematic is here; https://www.hifiengine.com/manual_library/quad/303.shtml The 303 is very well regarded. https://www.quadrevisie.eu/quadrevisie.html
  9. The specifications of the Gt02 say its audio out delivers 200mv this is slightly lower than normal line level of 310mv. You should be able to connect it using a stereo 6.5mm jack to RCA and connect it to your amplifiers aux or tape in RCA socket. If mixing in with a DVD player ability to alter level of each will likely require a small mixer like this: https://www.behringer.com/product.html?modelCode=P0576
  10. The topics question is strange as worded, ...leaving little to comment upon. A faulty amplifier even if it was carrying DC current would invariably trip the amplifiers fuse, & likely damage loudspeaker drivers , ... speaker cable would survive regardless. @troykm "Can a faulty amplifier damage speaker cable? I can’t think of any reason why it would. Or am I stupid for asking lol 😂 But if we are given ability to see it more so as as the interaction of speaker cable to amplifier, which i think was the writers intention, the topic IMO, is worthy
  11. But amplifiers do need zobels each end . Their capability as measured ( with a zobel fitted) is to only drive the speaker cable, and a resistor. A nice non reactance resistor dummy load with suitable wattage , not a loudspeaker is used to measure amplifier specifications as seen here as 8 ohms: Amplifiers should be modeled and measured with actual loudspeakers, we would then honestly see, what we are buying.
  12. Amplifiers ( rather than speaker cables ? as you state ) benefit from a zobel each end, as the article shows. Two amplifiers were tested a Douglas Self model and a Maplin mosfet see page 26 https://www.ka-electronics.com/images/pdf/Cyril_Bateman/Bateman_Speaker_Amp_Interaction.pdf "Used with typical speaker loads and unterminated cables, both amplifier’s Zobel networks and output inductors clearly do allow sufficient RF in phase signal reflections to pass from the amplifier output terminals right back to the base of the feedback transistor of the input differential pair, even
  13. Its worthwhile pointing and reminding to the actual ability of amplifiers and their relationship to speaker cables. Most amplifiers simply increase the voltage arriving at their inputs, to be available at their output and are rated, with parameters NOT into a speaker load, rather a high wattage non reactance resistor. A circuit called a Zobel network assists the amplifier, not to drive the speaker, but only to drive the speaker cables inherent reactance, but requires a Zobel at each end (1). The Zobel is present in almost all amplifiers other than some Naim amps, that have the z
  14. I think that might be the one , I recall it being down Townsend Crt probably Dundas Crt. and it was upstairs. I saw as I remember Galapagas Duck, and James Morrison play there. Soon after I saw Sebastian Hardie play, their rotating Leslie speaker was quite a feature as was Mario Millo on guitar, but different venue closer to the city.
  15. I recall calling to Duratone in 1977, lots of Celestions and some Quad 303/405 amplification in the back room, it was a friendly shop as I recall that suited people with music appreciation. Nearby was a jazz venue.
  16. I would try filling the rear mounted rectangular port on each speaker with a few socks or similar blocking material. Acoustic suspension remains IMO the best way of reducing distortion in bass drivers. https://en.wikipedia.org/wiki/Acoustic_suspension
  17. The next step is for us to accept recordings in a compressed form, in the same same form they were recorded, but then expand them during playback, directly related to the rate of compression used, to restore the original dynamic range that was present. https://www.manualslib.com/manual/560757/Dbx-Type-Iv-Conversion-System.html
  18. Not forgetting the bolt running through the middle inner core if using a toroidal, should be insulated from chassis earth. This is to avoid what is called a shorted turn. The inner core of a toroidal has the highest flux potential and can couple to the chassis lower potential if left un-insulated. https://sigatransformers.co.uk/standard-toroids/ In the attached image I have used the plastic hub of a Jaycar part SR1212 switch, to insulate the bolt of a 20VA toroidal , the lower rubber mat then snugly fits over. the bolt then has no conduction to chassis earth.
  19. Depressing more like it, as it is heavily proprietary based. The four essential freedoms are, 1. the freedom to use the program as you wish, 2. the freedom to copy and redistribute as you wish. 3.The freedom to modify the code to make the program do what you want to do. 4. the freedom to publish changes to the program With what you find interesting,... you cannot use the program as you wish, you cannot copy and redistribute, you cannot modify the code to make it do what you want it to do, and you can't publish changes to the program. I am unsure what could possibly re
  20. The specifications of your power amp is here: https://www.hifiengine.com/manual_library/anthem/mca-30.shtml Compared to this one: https://www.hifiengine.com/manual_library/quad/909.shtml The anthem mca-30 has ... 10 x the total harmonic distortion figure, so the distortion you are hearing may be attributed there, but lets look also at a few other areas. Simple things like checking your speaker cables are tight in their fittings at each end can prove very beneficial. Strange as it seems, we tend to hear other components distortion before that of loudspeakers.
  21. I would listen to it firstly for best audio from the existing pot , then measure resulting series and shunt resistances , ie input to wiper , wiper to ground. substitute those values then with fixed resistors. Failing that try, values of 18k in series and 82k to ground.
  22. Hi Mahdi Change the 100k pot for a fixed resistor, and use a certain board set 😍 prior to it , with remote volume adjustment. Cheers / Chris
  23. Make the LDR's matched NSL32SR3 , as they are the best specified for audio purpose.
  24. The answer for this is to use light dependent resistors, nothing I know of, will work so well. You will then have a entirely silent noise floor. The requirements technically are to have a L pad formed by 4 such devices, and power the anodes with at least 8 volts @3ma of current , and arrange a 2N7000 mosfet in common drain form rather than directly grounding the cathodes.
  25. Welcome, lots of Yamaha gear here too, listening to the CT 1010 at this very minute.
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