shipping boxes for heavy electronics

As noted above, you should see if you can buy a box from Parasound.

Another option is to contact a packing company like the Box Stop. You should ask the Box Stop (or other similar company in your area) for their opinion on the best way to pack and ship your unit. This will ensure your amplifier gets packed correctly. For example, see http://boxstop.biz/

I have used them several times and they are very good. Most likely, they will use a double box, include bubble wrap and/or foam, as needed, to protect your amplifier. The use of a professional packing company will help ensure your amplifier get delivered safely. The cost for this professional packing is reasonable and is recommended because of units weight.

.
Buy the box from Parasound. Whatever they charge will be worth it.

Liz's instructions are spot-on. Follow her instructions and you'll have a bomb-proof box. I've done it the same way dozens of times and I've never had an issue or a damaged item.

Professional packers are good, but very expensive compared to doing it Liz's way yourself.
.

Elizabeth is right. However, for best result you need padding between both boxes. Logic does wonders. I've done many. Logic didn't always work with other issues, though.

At some point you need to use wood/plywood on a pallet to insure safe transit. The big 3, usps, ups, fedex have a poor record shipping our expensive and cherished audio components. Good luck collecting for damages also. I have had a couple of nightmares via UPS, they delivered a set of speakers to Florida and left them out in the open to soak up the afternoon thunderstorm. The gorgeous finish on the monitors was trashed, cones soaked- a total loss. They tried to blame me saying they were poorly packed. I got $400- for $2k speakers.
If you want it to get there safely, go freight.

Thank you everybody for replying. I ended up buying a box from UPS store that is able to withstand 80+ lbs. And of course the UPS store guy said why don't you just let us pack it for you.

I told the UPS store guy that I have had bad experiences with them before, and proceeded to take the box to FedEx and have them pack up for me. heavy bubble wraps all around. No heavy foam however. This will be a lesson learned. And I hope it will get to Parasound safe and sound. I have had ok experiences so far with FedEx and hope they will be careful. The package has fragile stickers around all sides and package exceeding 70+ lbs sticker as well. on the receipt itself it was marked fragile also. I am worried now though hearing about the insurance nightmare issues. keeping my fingers crossed.

Thanks again for everybody's feedback. they are very valuable. Time to load up on some foams!