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stereo coffee

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About stereo coffee

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    Chris

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  1. I run a 6 metre interconnect with my passive pre - which is very real ( and really good too ) 🙂
  2. Hmmm... IMO not selective enough to receive AM radio and at the same time reject spurious emissions, rather expect both as you are presently experiencing. AM radio transmissions are vertical polarization, so require antenna that similarly are arranged vertically, therein a big advantage for you, as the loop you are using at the moment, is broadly both. I would try disconnecting the loop as it appears to be working against you for receiving AM radio properly. Try instead a simple piece of wire of about 4 metres length and have it heading skywards. If that works well then job d
  3. Think of the antenna narrowing reception to just to your needed reception, rather than spurious signal which is interference. What style of AM antenna do you use presently ?
  4. I would suggest using a dedicated antenna for your AM radio like this one, your Class D amps really should not radiate frequency beyond the confines of your chassis. To test either turn your amp off and see if the interference cancels or the other way bring a portable radio closer to the amp chassis to assess if it is radiating into the AM band. https://www.tecsunradios.com.au/store/product/tecsun-100-loop-antenna/
  5. The point is I was replying to your assertion that equipment was ahead of recordings, when in a number of areas that is quite untrue. namely Dynamic range, & frequency response. If you read what i have said i am giving him more help than he realizes by suggesting tone controls are not good for audio reproduction. it would be a sad day indeed if we just politely agreed with audio fantasies that in the long term prevent properly hearing recordings .
  6. Subjective opinion I agree. it would be interesting to know if the Bob Carver writing it is the same legendary amplifier designer.
  7. Most audio systems are not even close to what the recording can actually provide. I have often mentioned companding which is a portmanteau of compression and expansion, it has been used in the recording industry with aim of preserving dynamic range since about 1966. Yet few even know what it actually does, and despite manufacturer attempts it remains unused with playback..... until then, the result is ignoring 20db of available dynamic range that the recording contains. https://www.manualslib.com/manual/560757/Dbx-Type-Iv-Conversion-System.html Your first paragraph, ment
  8. The earliest Who recording I own is "Who else". Quite the opposite of what you are saying, occurs when using a good audio system. Recordings are not bad as such rather some just reveal their inherent history limitations. However what is there including the limitation for me, is hugely enjoyable. With a good audio system the limitation is like a separate present multi track and soon falls into place correctly with where it fits with what is heard. So it is not bad as such but important in most cases to also hear preserving what occurred. i never grit my teeth rather i enjoy what is th
  9. Jazz certainly is very pleasant but I can assure I also listen intently to some of the heaviest recordings as well, as they were intended to be heard. As example have you heard King Crimson Larks Tongues in Aspic part 2 Live at Asbury Park Casino ? It reveals so much on a good audio system, for instance you should be hearing the entire stage width including audience exclamations during the performance. John Wetton's bass is almost subsonic at times. It should be imminently apparent that it was a very well crafted live multitrack recording, for 1974 although has very minor i
  10. Can you give any examples of "that great music" that was badly recorded ? maybe I have the same recordings and can let you know how well they sound, without making them distort with added tone controls.
  11. A quick partial fix that should work for a while is to turn the unit off by disconnecting the AC cord from the wall socket , obtain some contact cleaner from Jaycar and nozzle spray the balance volume and every other potentiometer gaining access to their internal parts from inside , each are attached to the front panel, so will be just a matter of lining each up leaning into the inside front panel, then cleaning the tracks of each - give it about 30 mins before turning on again. Shown here cleaning a guitar amp, the video provider manages to find spider nests and disassembles
  12. When repairing your Kenwood a schematic diagram will show exactly how the parts are arranged. A schematic is available here: https://www.hifiengine.com/manual_library/kenwood/ka-7010.shtml You should find on page 9 how the source direct is wired and the principal cause of your difficulty is the balance control which is dual gang 200k potentiometer. A little history first shows audio signals were never designed to be arranged to traverse through potentiometers, Mary Hallock Greenewalt holds the patent for the rheostat and she was well aware of the potentiometer f
  13. A very similar thread asking about equalizers in home audio system was answered by many including myself here: Tone controls are not needed in good audio systems as they add distortion and remove your ability to hear the music you enjoy as it was intended to be heard. To get yourself on the right path again, begin visualizing components between your source and power amp to now be as simple as is possible, passing audio signals, as anything added to the source or detracted from the source there, is not what you require to be amplified. Rather the capability of the s
  14. There are certain equalizer circuits that are beneficial to audio reproduction, sadly though multi-band eq is not one of those, as multi band eq adds distortion and separates ( tears apart ) the actual ability of the recording from your proper appreciation. You are far better assessing exactly where losses occur in your audio system, rather than taking on trying to sense the loss in terms of certain frequencies alone by using a equalizer, you will never achieve ability to hear the recording as it was intended. . Our sensory ability is simply amazing, we can perceive depth, harmo
  15. In terms of circuitry - looking for reasons that might explain, just involving the signal path your Rotel preamp https://www.hifiengine.com/manual_library/rotel/rc-1070.shtml has as I see many unnecessary contacts, and many components adding reactance and phase change, which might pretty quickly explain congestion.
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