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Re: Attenuate highest highs?

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On 20/02/2020 10:44 am, Trevor Wilson wrote:
> On 19/02/2020 1:02 pm, ~misfit~ wrote:
>> On 19/02/2020 11:14 am, Trevor Wilson wrote:
>>> On 19/02/2020 6:41 am, Trevor Wilson wrote:
>>>
>>>>
>>>> **Those "tinkling noises" you hear are somewhere around 3kHz. 
>>>
>>> **Should read: "....somewhere around 3 ~ 5kHz."
>>
>> It seems to be higher.
> 
> **Until it has been measured, then we're both guessing. Few instruments go as high as 5kHz. There 
> is almost nothing beyond 10kHz in any music.
> 
>>
>> FWIW I just did this on-line frequency hearing test:
>> <http://onlinetonegenerator.com/hearingtest.html>
>> and through my monitor-mounted Dell soundbar (with 25mm drivers) I could hear to just over 
>> 12.5kHz but through the stereo in question could only hear to about 11.5kHz. That's quite a bit 
>> lower than the last time I used a similar tool a few years back. Maybe those years when I spent 
>> hours several nights a week at a mixing desk at live (loud) gigs in my 20s are coming back to 
>> bite me?
>>
>> So now I'm a bit baffled. The issue I have is due to sounds at the highest frequencies that I can 
>> hear and that seems to be ~11kHz with this system in the current configuration. Maybe they have a 
>> peak about there or are flatter than the other speakers I've tried...
> 
> **Until you perform some measurements, you're guessing. You could try to acquire a (preferably 
> digital) parametric equaliser and perform some measurements.
> 
> I still betcha room treatments will solve your problems. IME (which is substantial), room 
> treatments solve most mid-HF problems, PROVIDED there is nothing inherently wrong with the 
> equipment, or the amp is not being clipped.
> 
>>
>>> Very few instruments possess fundamentals that reach 5kHz. A very tiny number posses harmonics 
>>> of significant levels that exceed 10kHz.
>>>
>>> Turn the volume down and see if the sound is still annoying. I suspect you are clipping your 
>>> amplifier. Clipping can generate large amounts of high frequency harmonic content. And, just to 
>>> shut down any myths you may have heard: Valve amplifiers WILL clip and WILL generate excessive 
>>> high frequency harmonics if over-driven.
>>
>> It's not clipping. The Dynaco ST120 I have hooked up at the moment is a solid-state amp and I no 
>> longer own any valve amps.
> 
> **You've checked with a 'scope to ensure no clipping then? Or are you guessing again? It might 
> worth looking at the waveform on a 'scope to see if there are no parasitics present.

Of course I'm guessing. I know this is rec.audio.high-end but I don't have (or have access to) a 
parametric equaliser or an o'scope. When I say I'm not listening at low 'office level' volumes I 
also don't mean ear-bleeding party volumes. Maybe somewhere in the 'half volume' range on a 60 - 80 
wpc amp... I've currently got a Marantz Stereo Reciever SR4023 hooked up set to 'flat' (it has a 
pre/power loop for the subwoofer amp) and the issue is the same - but the amp belongs elsewhere.

However I have used these speakers with a few different amplifiers, (from 25 watts /channel class A 
up to 160 w/c RMS) and at different volumes and in different locations and the issue I perceive 
persists.

I realise that without measuring we're all making educated guesses. Really I just wanted to know 
what to add to the speaker crossovers / tweeter wires to attenuate frequencies above say 10kHz by 
maybe 3db (and not attenuate the crucial frequencies where female vocals and the upper reaches of 
electric guitar solos and harmonics reside).
-- 
Shaun.

"Humans will have advanced a long, long way when religious belief has a cozy little classification 
in the DSM"
David Melville

This is not an email and hasn't been checked for viruses by any half-arsed self-promoting software.

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Attenuate highest highs? ~misfit~ <shaun.at.pukekohe@gmail.com> - 2020-02-13 01:19 +1300
  Re: Attenuate highest highs? Unsteadyken <unsteadyken@gmail.com> - 2020-02-13 16:59 +0000
    Re: Attenuate highest highs? ~misfit~ <shaun.at.pukekohe@gmail.com> - 2020-02-14 12:18 +1300
  Re: Attenuate highest highs? Peter Wieck <peterwieck33@gmail.com> - 2020-02-14 04:11 -0800
    Re: Attenuate highest highs? ~misfit~ <shaun.at.pukekohe@gmail.com> - 2020-02-18 18:05 +1300
      Re: Attenuate highest highs? Peter Wieck <peterwieck33@gmail.com> - 2020-02-18 06:45 -0800
        Re: Attenuate highest highs? ~misfit~ <shaun.at.pukekohe@gmail.com> - 2020-02-19 14:21 +1300
  Re: Attenuate highest highs? Trevor Wilson <trevor@rageaudio.com.au> - 2020-02-15 04:18 +1100
    Re: Attenuate highest highs? Peter Wieck <peterwieck33@gmail.com> - 2020-02-14 10:32 -0800
      Re: Attenuate highest highs? Trevor Wilson <trevor@rageaudio.com.au> - 2020-02-17 04:58 +1100
        Re: Attenuate highest highs? dpierce.cartchunk.org@gmail.com - 2020-02-17 14:27 -0800
          Re: Attenuate highest highs? Trevor Wilson <trevor@rageaudio.com.au> - 2020-02-19 06:35 +1100
      Re: Attenuate highest highs? ~misfit~ <shaun.at.pukekohe@gmail.com> - 2020-02-18 17:28 +1300
        Re: Attenuate highest highs? Trevor Wilson <trevor@rageaudio.com.au> - 2020-02-19 06:41 +1100
          Re: Attenuate highest highs? Trevor Wilson <trevor@rageaudio.com.au> - 2020-02-19 09:14 +1100
            Re: Attenuate highest highs? ~misfit~ <shaun.at.pukekohe@gmail.com> - 2020-02-19 15:02 +1300
              Re: Attenuate highest highs? Trevor Wilson <trevor@rageaudio.com.au> - 2020-02-20 08:44 +1100
                Re: Attenuate highest highs? ~misfit~ <shaun.at.pukekohe@gmail.com> - 2020-02-20 13:05 +1300
                Re: Attenuate highest highs? Trevor Wilson <trevor@rageaudio.com.au> - 2020-02-21 05:01 +1100
                Re: Attenuate highest highs? Peter Wieck <peterwieck33@gmail.com> - 2020-02-21 04:37 -0800
                Re: Attenuate highest highs? Trevor Wilson <trevor@rageaudio.com.au> - 2020-02-22 06:57 +1100
                Re: Attenuate highest highs? Peter Wieck <peterwieck33@gmail.com> - 2020-02-21 12:48 -0800
                Re: Attenuate highest highs? Trevor Wilson <trevor@rageaudio.com.au> - 2020-02-23 05:37 +1100
          Re: Attenuate highest highs? ~misfit~ <shaun.at.pukekohe@gmail.com> - 2020-02-19 14:28 +1300
            Re: Attenuate highest highs? Trevor Wilson <trevor@rageaudio.com.au> - 2020-02-20 08:57 +1100
              Re: Attenuate highest highs? ~misfit~ <shaun.at.pukekohe@gmail.com> - 2020-02-20 13:46 +1300
                Re: Attenuate highest highs? Peter Wieck <peterwieck33@gmail.com> - 2020-02-20 05:18 -0800
                Re: Attenuate highest highs? Trevor Wilson <trevor@rageaudio.com.au> - 2020-02-24 09:46 +1100
    Re: Attenuate highest highs? ~misfit~ <shaun.at.pukekohe@gmail.com> - 2020-02-18 16:18 +1300
  Re: Attenuate highest highs? dpierce.cartchunk.org@gmail.com - 2020-02-14 13:05 -0800
    Re: Attenuate highest highs? ~misfit~ <shaun.at.pukekohe@gmail.com> - 2020-02-18 17:48 +1300
  Re: Attenuate highest highs? "Mat Nieuwenhoven" <mnieuw@zap.a2000.nl> - 2020-02-17 08:50 +0100

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