2. amps-preamps
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Preamps waste of money?

I've been forced to reevaluate the role of preamps. The best sound I have achieved is result of adding a stepped resistor volume control at the input stage inside of my tube amp. All other options I have tried or auditioned including both active and passive volume control(autoformer and LDRs)have "colored" the sound in one way or the other to an unacceptable degree compared the stepped attenuator at the input. Has anyone had similar experience?
dracule1
stanwal's avatar
stanwal
3,147 posts
 
I am now using the Townshend Allagri transformer coupled passive and it is the most uncolored "preamp" I have had. But good transformer coupled ones are not cheap; it is $3000 and the top end over $12,000.
grannyring's avatar
grannyring
6,468 posts
 
My experience is the polar opposite of yours. I find an active preamp to be the heart of a good system. Any and all attempts to use a passive or volume control on the amp or source have come up way short in my experience.

In my experience to not have a good active preamp is somewhat of a hindrance to great sound and music.

All of this is so subjective and it makes perfect sense you may think the polar opposite of myself.

Enjoy your music as you like!
jaxwired
232 posts
 
Depends on the system. Sometimes a passive volume control works and sometimes you need a preamp. I am currently using a placette passive volume control in front of a musical fidelity A3cr amplifier and getting stunning results. However, I have tried the placette with other amps and gotten different results. I will say that when it does work it is the most transparent option. The placette uses stepped vishay resistors.
stevecham
3,340 posts
 
I too like preamps and find that they can provide an optimal source impedance and gain stage that enhances the sonic performance. Passive is not always "better."
roscoeiii's avatar
roscoeiii
1,155 posts
 
My experience with preamps is that at a certain price point an active preamp can get you the level of detail that a passive provides. In my experience, a passive preamp while giving gobs of details also tends to limit dynamics and drive. The "oomph" as you will. This will be more or less important according to both your music preferences and what matters most to you for musical reproduction. At lower price points this trade-off between detail and drive is a decision that each of us must make for ourselves.

And it must also be noted that passives and attenuators will not work well in a number of situations, particularly when a source has a high output impedance and an amp has a low input impedance.

Others more knowledgeable than myself will likely chime in to add to this.
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