Reverb springs

[RayL]

Here's a little bit of a conversation about reverb spring units between two guys on the Sound On Sound website

I’m just wondering though, how much of the sound is attributed to the unit, rather than the spring? It does sound extraordinarily good, very spacey.

Oh COME on! Spring reverbs are g'awful things from a sound quality point of view. Full of resonances and colourations. I doubt the transducers are very linear. I put one in a 100W valve amp for a famous guitarist*, company favour (never got a drink either!) and had to work up a notch filter to pull out a nasty honk. In other words, it is ALL about the spring!
You do not want to hit them with much below about 150Hz and a sweepable mid filter would be very useful.

*Hank Marvin told me years ago "never name drop"