On 6/11/2017 2:45 PM, kevino z wrote:
Although headsets like my Heil Pro 7 may be more money, am I really
"wasting" money on buying a "fancy brand name" considering the
unit consists of mic and incredible speakers?
Yes, at about $250 retail (plus adapter cable), the Pro 7 is more than
five times as expensive as the Yamaha CM-500 (electret mic), Koss SB40
(dynamic mic) or SB45 (electret mic) headsets. Both the Yamaha and
Koss headsets have outstanding 120 Ohm headset drivers with sensitivity
rated at 96dB/mW and microphones well tailored for voice work. Heil
does not even publish the impedance or sensitivity for their headset
drivers!
For the price of a Heil Pro 7 one could get a Broadcast headset like
the Audio Technica BPHS1 ($199), Sennheiser HMD280 ($249) or Shure
BRH440M ($249) - all of which are significantly higher quality than
the Pro7 (and field proven).
73,
... Joe, W4TV
On 6/11/2017 2:45 PM, kevino z wrote:
Although headsets like my Heil Pro 7 may be more money, am I really "wasting" money on
buying a "fancy brand name" considering the unit consists of mic and incredible
speakers? It is a complete package. Besides the amazing electret mic, the sound from the headphones
helps me to enjoy the hobby more and allows me to pick out signals I would not be able to without
them. I don't think you meant to, but your post came off as if we bought some snake oil.
-Kevin (KK4YEL)
No trees were killed in the sending of this message. However, a large number of
electrons were terribly inconvenienced !
On Jun 11, 2017, at 10:41, Joe Subich, W4TV <[email protected]> wrote:
Bob and Jim have excellent points.
There is one advantage for the electret mic compared to a dynamic
mic. Electrets are generally 26 dB "hotter" than a dynamic mic
and thus are much more resistant to common mode RF feedback and
magnetic coupling. However, that assumes the transceiver is
designed for the higher input level and properly reduces gain
before the mic gain control.
Mics of any kind - dynamic or condenser/electret - with wide frequency
response are completely wasted for amateur radio (or any communications
application). You really want a clean 200 Hz - 4 Hz response. Lower
frequencies cause distortion and waste power, higher frequencies are
simply lost in the "channel noise".
Like Bob and Jim, I spent my professional life in the recording and
broadcast industries. Amateurs waste far too much on over spec'd
microphones and fancy "brand name" advertising campaigns.
73,
... Joe, W4TV
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