I'm playing tenors next year, but we only have quads.
I bought a Pearl spock for them, but I can't get it tuned right.
When I get it close to what I believe to be the "true" spock soumd, the head seems to not be tensioned high enough and when I shot it just makes horrible dents in the head.
When I get it tuned high enough for the head to be durable enough to resist denting the head and bearing edge are rising above the rim.

So:
Close to sounding good = Denting
Head durability = Head rising above rim

I'm new to the whole spock thing so if I'm doing something wrong please help me out.

are you useing the stock head?
if so dont get the 6" remo smooth white (its like indestructable)
then take your old stock head and cut out the mylar so oyu have just the metal rim
put your new remo on the shell and the put the empty metal ring on between the head and the actual rim
thats what my line does and it keeps the rim high enough to hit shots even when its cranked

The above are good suggestions, but a little out of order.

From the trouble being experienced, sounds like there's a one ply head (like a Pearl CT or equivilant) on the drum. These are very thin and can't take much of a beating.

Any two ply marching head will be a better choice for sound and durability.

While the double hooping process is helpful for maintaining head life and bearing edges, don't attempt it without someone really showing you. This process can crack lug casings, pull heads and cave shells if executed poorly.

And I don't recommend double hooping a new head. It's more of a quick fix for situations where new heads aren't available. Doing it to a new head will create a rim too high for any proper playing technique.

If you need your rims higher, you must not have yahmahas

ON TOPIC:They're right, just get a better head.

works for our lines tenors and makes it so you never miss a shot on the gock
and we always do it with new heads
our tech said thats how they do it at cadets when he marched there so i guess it cant be that bad

The reason why you don't double hoop a new head is because it shortens its life and can damage the lugs. The best thing for maximum head life you, put it on non double hooped. as it stretches go back and double hoop it. Snarepaint is right, if you don't know what your doing you can do some serious damage to the spock

As far as the Cadets, They have a generous head budget as well as they switch them out a few times a week. Corps do what they do because of the abuse they put the equipment through. One day of corps is about one or two weeks of a typical high school line. So just because a corps does it that way doesn't mean its the right way to do it for another line. Not bagging on Cadets. But they have a reason for what they do. that doesn't always apply in the real world

ok i see you point
someone should tell our tech that cuz weve been doing that to new heads for about 3 or 4 seasons now

Grammar please! Yeah its simple why cadets do that, bigger budget and they use it more often.

I mean its not a bad thing to do. He obviously knows what he is doing. My biggest thing with double hooping with a new head is the rims being so high that you bust your knuckles when doing a rim shot on drum one or two. It's just easier to break in the head for a couple of weeks

oh we use those little bolts on either side of the carrier to raise the 4 main drums so that doesnt happen...it works for us