I have noticed that the higher end basses from Dingwall could have either the Darkglass TC or the Glockenklang preamps (if not passive). Anyone have experience with both, and what were your thoughts? Thanks!
They are very different! There are two important factors that might drive you to choose one or the other. If you want a tone roll off in passive mode, you need to have the Glock. If you like to play with aggressive, biting distortion, you probably want the Darkglass. They both sound great clean, but the Darkglass sounds a little better with aggressive distortion. For mild distortion or warmth, either is fine. The other difference is that the Glock lets you boost your high highs a lot, if you want to annoy your German Shepherd. The DG with its low mid and high mid knobs puts the EQ centers more where the money is for playing bass. If you are running them dead flat, with all controls at their center detents, both preamps do nothing detectable to your signal, in other words they are both 'transparent", and have no effect. But when you move the controls away from flat, the Glock remains more transparent than the DG. I don't know the technical reason, but I am going to guess that the DG tone controls have higher Q, meaning their bandwidth is slightly narrower, and therefore they create tighter or more focused peaks or valleys in the frequency response curve. Somebody more technical who knows the actual difference could perhaps confirm this.
I will be the first to say that I hate using figurative language to try to describe sound, because it is so vague and open to interpretation. But if I were to describe each in a word, the word for the Glock would be clean or pure or uncolored, and the word for the DG would be slightly colored, whatever that means. But I hate saying that since it could mean different things to different people. Sound is so personal, you really have to listen to it yourself and decide what you like. I have basses with each, and they both sound good! I know I keep saying this and regulars here are sick of reading it, but I'm going to make some recordings as soon as I have the time and skill to do so. There are already some recordings on the Dingwall site, though it has been a while since I listened to them and I don't remember exactly what is there.
One last thing I want to note is that for those with a DG preamp in their bass, if you like to play with heavy distortion, counter-intuitively it actually helps if you turn the low mid control way down. I even often run mine at zero, fully counterclockwise. Then the distortion pedal sounds better, and you can reintroduce those low mid frequencies through through additional downstream tone control after the distortion pedal if you want. By hitting the distortion pedal with heavy low-mids, you end up with a pile of mud.