redoing a professional instal

When i had everything installed, they installed a 60a fuse underneath my hood.  I didnt know what size it was until i blew it.  Anyway I was reading the amp manual and it says to use a 180a fuse.  Now to me this seems like a HUGE differnce.  My question is, if everything is working ok should i change the fuse to the 180a (maye 150a since i cant find a 180a)?  Does having a lower rated fuse do anything to restrict power getting to my amp?  Thanks and the amp is a Memphis 16-MC1300D 75watts x4 and 1000w x1 rms. thanks.Memphis MC-1300

2 12" JLw6v2

Diamond audio M3 6x9

Diamond audio M3 5.25 components

Audio control Matrix

Carputer

Heck no, i wouldn't let Circuit city touch my stuff.  Give me some credit.  It was a local stereo shop that a few of my friends reccomended to me.  Dont think ill be going back.Memphis MC-1300

2 12" JLw6v2

Diamond audio M3 6x9

Diamond audio M3 5.25 components

Audio control Matrix

Carputer

all a fuse does is protect the amp, if your amp for some reason decides to pull more amps than it can handle the fuse pops and shuts down the connection to protect the amp from damagewhat!?!?! you want some??

Thats not totally true. The fuse serves several purposes. First off the fuse does protect the amp from a short under the hood. It also protects the batttery incase something arcs out in the back or the amp decides it should send a ground spike back through the line which I saw happen when a chap amp had a wire break off inside the amp and arc on the 12 volt line. It also does stop the amp from drawing a dangerous amount of power. It sounds to me like that amp may not be fused internally in which case their should be a fuse in line both at the battery and right by the amp. If there arent two fuses, then get another one.double-secret reverse-osmosis speaker-cone-induced high-level interference distortion, Its a killer

Actually, guys, while you are all right, to a certain extent, the under-hood fuse is to protect the CAR, first and foremost! The fuse under the hood can be a 500amp fuse if your power cable is big enough to support that current capacity. It has nothing to do with the power demands of the amplifier (if properly installed). You rate the fuse according to the SIZE of the POWER CABLE. The reason I say it this way is this: If you have an amplifier that only draws 100 amps, your distribution block will have the 100 amp fuse in it, or the amp will have that protection capacity in the end of it. Obviously you would never need to run a 1/0 cable to the trunk for a 100 amp load, but if you did, you would fuse the cable appropriately. If the car is ever in an accident, and the power cable is pinched, or the insulation is broken for any other reason, the main fuse under the hood would blow. If properly rated, it will blow before the cable can get hot and catch on fire. THAT is the very reason you place this main fuse within 18 inches of the battery.It all reminds me of something that Molière once said to Guy de Maupassant at a café in Vienna: "That's nice. You should write it down."