OT: Yamaha 'phones specs: has the world gone mad?

[DOUGLAS ZWIEBEL]

After all of the discussion on here about "WHY" some guys might
perceive "noise" where others do not, why are 'phones with these specs
even being considered for a K3 (unless your own hearing cuts off at
4kc).


Frequency Range
    20 Hz - 20 kHz

Microphone Type
    Dynamic

Mic Frequency Response
    100 Hz - 20 kHz

Impedance
    Headset: 120 Ohms
    Microphone: 600 Ohms

Give me 'phones designed for "communication" any day of the week (EG:
Kenwood HS-5, which is what I've have used for ham radio for "ever").

de Doug KR2Q
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[n7ws]

We've been through this before.  Where have you been?

--- On Mon, 1/11/10, DOUGLAS ZWIEBEL <[hidden email]> wrote:

From: DOUGLAS ZWIEBEL <[hidden email]>
Subject: [Elecraft] OT: Yamaha 'phones specs: has the world gone mad?
To: "Elecraft Reflector" <[hidden email]>
Date: Monday, January 11, 2010, 11:10 AM

After all of the discussion on here about "WHY" some guys might
perceive "noise" where others do not, why are 'phones with these specs
even being considered for a K3 (unless your own hearing cuts off at
4kc).


Frequency Range
    20 Hz - 20 kHz

Microphone Type
    Dynamic

Mic Frequency Response
    100 Hz - 20 kHz

Impedance
    Headset: 120 Ohms
    Microphone: 600 Ohms

Give me 'phones designed for "communication" any day of the week (EG:
Kenwood HS-5, which is what I've have used for ham radio for "ever").

de Doug KR2Q
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[pd0psb]

No Doug, the world has not gone mad :-)

What you seem to overlook is that reproduction (even in communications) has to be linear.
Be it from 50-8000Hz or from 300-2700Hz or 400-600Hz, that's not important.
Within the chosen passband response,filters and transducers should be linear for faithfull reproduction of signals.

If you buy a radio with variable bandpass and TX/RX EQ, the headset <imho> shouldn't limit your options.
And a 20-20000Hz headphone *may* perform better at linearity...

73'
Paul
PD0PSB

DOUGLAS ZWIEBEL wrote

After all of the discussion on here about "WHY" some guys might
perceive "noise" where others do not, why are 'phones with these specs
even being considered for a K3 (unless your own hearing cuts off at
4kc).


Frequency Range
    20 Hz - 20 kHz

Microphone Type
    Dynamic

Mic Frequency Response
    100 Hz - 20 kHz

Impedance
    Headset: 120 Ohms
    Microphone: 600 Ohms

Give me 'phones designed for "communication" any day of the week (EG:
Kenwood HS-5, which is what I've have used for ham radio for "ever").

de Doug KR2Q
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[Jim Brown-10]

On Mon, 11 Jan 2010 12:22:07 -0800 (PST), Paul, PD0PSB, wrote:

>No Doug, the world has not gone mad :-)

>What you seem to overlook is that reproduction (even in communications)
>has to be linear.

Exactly right, Paul. The late Dick Heyser, inventor of Time Delay
Spectrometry, among other things, and an engineer working on
communications for the space program at JPL, once said that "describing
a system using only its frequency response was like trying to write
poetry with a single word in your vocabulary." The same could be said
about antennas and SWR.

The numbers for frequency response in the original post failed to
include one of the post important parts of the response spec -- the
TOLERANCE in +/-dB for the stated response.

Furthermore, bandwidth is limited within the K3 by a lowpass filter at
the output of the DSP, AND there is a "graphic" equalizer within the DSP
that you can access with RXEQ and set as you like for your ears,
loudspeakers, and headphones.

FWIW, I always use top quality high fidelity headphones with my ham
rigs, including my K3s, and I'm quite pleased with the result. The only
time I was happy was with a Ten Tec Omni V, which lacked the low pass
filter, and thus sounded "hissy." The headphones in my shack are Sony
MDR7506 and MDRV-6, Yamaha CM500 (for when I want a boom mic), Etymotic
Research ER4, and two Shure in-ear models.

73,

Jim K9YC


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