The reason I would still choose a SS pre over a tube pre (even assuming the highest quality of either) is because to me, transistors are the device of choice for handling very small/weak signals. There are a number of different reason I feel this way including:
>> transistors don't change their behavior over time
>> transistors don't require large power supplies (compared to a similar tube unit)
>> transistors (except power output transistors) don't generate much heat (which can affect other electronic parts)
>> transistors don't produce electron "rush" (tube noise) which in a low level device like a preamp is bound to be amplified. Tube noise and tape hiss is why Dolby Laboratories was born ;-)
Preamps don't generally amplify the signal. They just select it, balance it, and attenuate it (reduce it's strength) when you don't want to play the music loud.
One kind of preamp that DOES amplify is a phono preamp. And in most cases, it also provides RIAA equalization to reduce record surface noise and strengthen the high frequencies. Frankly, I'm divided on this one. On one hand, I like tube PHONO preamps because you can mess with the tubes ;-) On the other hand, they DO make noise, and what I really dislike is the fact that if you want enough gain for MC cartridges, you almost always have to use a step-up transformer before the preamp; and I really dislike those! Transistor phono preamps can deliver plenty of noise-free gain, even for the lowest output MC cartridges. But you can't "roll" transistors; so if you want to tailor the sonics, why you're just SOL ;-)
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>> transistors don't change their behavior over time
>> transistors don't require large power supplies (compared to a similar tube unit)
>> transistors (except power output transistors) don't generate much heat (which can affect other electronic parts)
>> transistors don't produce electron "rush" (tube noise) which in a low level device like a preamp is bound to be amplified. Tube noise and tape hiss is why Dolby Laboratories was born ;-)
Preamps don't generally amplify the signal. They just select it, balance it, and attenuate it (reduce it's strength) when you don't want to play the music loud.
One kind of preamp that DOES amplify is a phono preamp. And in most cases, it also provides RIAA equalization to reduce record surface noise and strengthen the high frequencies. Frankly, I'm divided on this one. On one hand, I like tube PHONO preamps because you can mess with the tubes ;-) On the other hand, they DO make noise, and what I really dislike is the fact that if you want enough gain for MC cartridges, you almost always have to use a step-up transformer before the preamp; and I really dislike those! Transistor phono preamps can deliver plenty of noise-free gain, even for the lowest output MC cartridges. But you can't "roll" transistors; so if you want to tailor the sonics, why you're just SOL ;-)
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