Have a look at this list:
Hopefully, you'll have a couple of these movies at home, so that big smile you have now will stay with you for days...........
Thanks Neutro for your answer, which i asked hoping that someone would list a few SPL meters that do go flat down to 20 Hz or less,
for the benefit of forum users.
i do have one SPL meter that does this, and not at a great cost:
it is a Shimana SHGLSL021
it can be had for less than 175$ in Canada and the specs can be found here:
you can check the result of the low freq. resp. of my system here (the graph is down the page):
the 10Hz reading on the graph is most probably due to some standing wave.
also, note the scale used on the y axis.