Home > Consumer Reviews > Auralex GRAMMA: Amp and Monitor Isolation Riser, Charcoal, Single

I've been playing bass for a classic rock cover band through an Ampeg 328. I love my amp. It's not a 400-watt monster, but it suits my needs since I'm primarily a guitar player. The problem was, it sounded great in my own rooms, but our practice room is in a portable (nothing under the floor) and most stages are elevated platforms. My understanding is the floors were acting like a membrane that absorbed my sweet tone. And volume. It sucked. But no more!

I bought this thing at a local store after reading all the reviews, and because I was offered a 30-day return policy. That 30 days is going to expire and I WILL NOT give up my GRAMMA. I gigged with it the first night I had it and my amp sounded AMAZING. 150 watts through 2x8's, and I was easily heard among the drums and lead guitars using tube amps. My amp sounded like I've wanted to sound since I've been playing with this band. It was the first time I realized my amp wasn't worthless. All the guys in band were blown away at the difference it made. It truly does isolate your amp so it's only moving air, like the manufacturer intended, and gives you the sound and tone you should have. Seriously, I'm a pretty peaceful guy, but I'll fight someone who tries to take my GRAMMA.

I don't know if guitars would really benefit because of their higher frequencies, but if any speakers are hard for you to hear the GRAMMA could be a great solution that'll cost hundreds less then replacing your rig or monitors. I give it a gigging bassist's two thumbs up.

Absolutely incredible! I now fear no room :)
This board tightens up the sound of my Eden 4-10 bass amp and gives such an incredible clarity and punch regardless of the room I'm working in.
I had 2 but let a friend use one for his studio .....it hasn't come back yet!

Auralex Gramma Amp Isolation Riser

Currently updating my small Home Theatre setup and I'm happy to say the Auralex GRAMMA Isolation riser, which is placed under a Klipsch RW-10d subwoofer, has noticably 'improved' the sound Quality and Clarity of my listening space.

So, Yes, I had to agree with the reviews I studied before making this purchase. Have also tested the Auralex MoPADs under a pair of Klipsch F1 synergy floor standing speakers... AMAZING

Purchased the Auralex GRAMMA amp isolation riser in Dec 08 to use with a SVS PB10-NSD subwoofer in an upstairs home theater room which was causing house rumble and plaster pops (over dry wall nail/screws). The GRAMMA worked like a champ, no more house rumble, no additional plaster pops for an inexpensive price. Wife is happier and the sub even sounds clearer! Well made product, defintiely recommend.

The first Gramma I purchased was to use underneath a subwoofer in a 5.1 home theater/audio setup. This product really does a great job of isolating and tightening up the notes from the subwoofer so that what you hear is real bass and not something that is affected by the floor. Next I bought one to put underneath a stand for my audio and video components. I know that sounds crazy and maybe it is, but I wanted to isolate everything from the vibrations on the floor. I really don't know if that makes any difference sound-wise since I didn't do a comparison, but I feel better knowing the stand is resting on a Gramma instead of directly on the floor. My third and fourth Grammas were purchased to go underneath left and right studio monitors used to amplify electronic drums when I want to hear them without using headphones. Again, they do the trick of isolating the sound so what you hear comes from the speakers and not impacted by the floor. They are very sturdy and the claim that they support 300 lbs seems accurate to me. My only complaint is that these are pretty expensive considering one could probably make something like this for a lot less money, but since I am a klutz when it comes to making anything and am lazy as well, to me it is worth spending the $$ for one of these. Or four.