10% THD in a Guitar Amp is a good thing in some cases.Most have a separate
PRE (Preamp ) and POST ( should be self explanatory. ) By running the PRE
higher Fuzz or Distortion is created to add effects to the sound.
Personally, 10% distortion when trying to listen to a receiver or stereo
fatigues me. And to listen on a 3 inch speaker at higher volumes with a 2
watt limited output and 10% distortion just sucks. My Kaito KA1102 which is
a Really Cheap Chinese receiver has those same specs. This could be
expected from an entry level HF rig but really, the Big Box stuff could be
better. There is a Poor Man at this shack but, a three to ten thousand
dollar radio needs better audio IMHO. For those who find the audio and
speaker combination hard on the ears, remember the Line Level Audio Jack on
the rear and better amplified speaker/s would be a good way to go. Now the
station here is just a 585 Paragon which has a pretty decent speaker in the
matching power supply. The tinny little speaker in the rig? Not so great. A
set of quality Computer Speakers really make a difference.
73 de
Wade/KJ4WS
On Wed, May 16, 2012 at 9:42 PM, Jim Brown <k9yc@audiosystemsgroup.com>wrote:
> On 5/15/2012 10:37 PM, Richards wrote:
> > Am I the only one to think the audio output kinda sucks ?
>
> With some receivers it certainly does, especially those that are power
> or supply voltage limited. BUT -- I like to think that I know the
> difference between my ham rig and my home entertainment system. There
> are MANY important radio specifications, both from functional and
> performance points of view. If you want a rig that is very light to drag
> up a mountain or put in your pocket, battery voltage and current drain
> will drive the design, and that will limit output level. That IS a
> design objective of all Elecraft radios, and the K3, even with two
> complete high performance receivers draws only 1A on receive. I ran
> single-op Field Day nearly full time QRP with a K3 and two big Costco
> deep discharge batteries, and still had plenty of charge left at the end.
>
> FWIW, for ham radio at home, headphones have ALWAYS been my primary mode
> of operation. I use a loudspeaker only for casual listening. Every
> radio I've ever owned has had quite adequate drive for headphones. On
> the other hand, a mobile radio, including a talkie, needs enough audio
> to get over ambient noise, and many of these rigs don't.
>
> 10% distortion is a standard spec for industrial paging systems. That's
> the distortion at the peak of the signal just below clip, and is typical
> of many computer sound cards. You would be surprised how GOOD 5% second
> harmonic distortion sounds -- Aphex made big bucks selling audio
> "sweeteners" for broadcasters and recording studios with a knob called
> "warmth" that. What it did was intentionally PRODUCE second harmonic
> distortion. Third harmonics and higher orders (fourth, fifth, and so
> on) sound bad at very low levels.
>
> 73, Jim K9YC
>
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