IndianEars
Well-Known Member
Just my 2 cents on this debate.... I agree with Fantastic.
Yes, Kanwar, as you said
Such qualified specs are the norm rather than the exception for tube pre amps.
Tube Preamps rarely operate well into impedances below 10K ohms, (they are often tested with 100K loads) even though their output impedances are typically around 300 Ohms ( at 1 KHz ).
The consequence of driving low impedance loads is typically an increased distortion of several hundred percentage ( 400% or 12dB increase in distortion is a 'low' increase in distortion for such cases).
You said
I was unaware of this and find this a very good argument for Class D power amps.
I would GENUINELY like to understand and learn more on this.
Can you please elaborate or point me to links and papers that are informative on this ?
Many Thanks
P.S: PLEASE Do Not mis-understand this post. My interest in this topic is Genuine, and certainly not any attempt to contradict or needle you.
Yes, Kanwar, as you said
It is always stated in specs usually [Max voltage swing 30V into 600 ohms<<< like this]
Such qualified specs are the norm rather than the exception for tube pre amps.
Tube Preamps rarely operate well into impedances below 10K ohms, (they are often tested with 100K loads) even though their output impedances are typically around 300 Ohms ( at 1 KHz ).
The consequence of driving low impedance loads is typically an increased distortion of several hundred percentage ( 400% or 12dB increase in distortion is a 'low' increase in distortion for such cases).
You said
No other linear amplifier class comes closer to the reactive current drive feature of Class-D amps. They effortlessly give reactive current SINK-SOURCE and again recycle them back to the power supply.
I was unaware of this and find this a very good argument for Class D power amps.
I would GENUINELY like to understand and learn more on this.
Can you please elaborate or point me to links and papers that are informative on this ?
Many Thanks
P.S: PLEASE Do Not mis-understand this post. My interest in this topic is Genuine, and certainly not any attempt to contradict or needle you.
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