stevie Posted February 26, 2012 Share Posted February 26, 2012 So these things work on concrete floors when the speaker cab is on castors. What principle is involved here? Has anyone carried out any before/after measurements? Quote Link to comment Share on other sites More sharing options...
Rumple Posted February 26, 2012 Share Posted February 26, 2012 5 minutes on Basschat on a Sunday morning and I find out there's something else I need to buy, luckily it's not too expensive Quote Link to comment Share on other sites More sharing options...
KiOgon Posted February 26, 2012 Share Posted February 26, 2012 [quote name='stevie' timestamp='1330255541' post='1554584'] So these things work on concrete floors when the speaker cab is on castors. What principle is involved here? Has anyone carried out any before/after measurements? [/quote] Yes, after measurements = your cab is approx 2.5" higher than it was before standing it on a Gramma Quote Link to comment Share on other sites More sharing options...
icastle Posted February 26, 2012 Share Posted February 26, 2012 [quote name='KiOgon' timestamp='1330260927' post='1554717'] Yes, after measurements = your cab is approx 2.5" higher than it was before standing it on a Gramma [/quote] ...and bouncier as well... Quote Link to comment Share on other sites More sharing options...
icastle Posted February 26, 2012 Share Posted February 26, 2012 [quote name='stevie' timestamp='1330255541' post='1554584'] So these things work on concrete floors when the speaker cab is on castors. What principle is involved here? Has anyone carried out any before/after measurements? [/quote] Well the principle involved is that vibration that would normally travel throught the cabinet and be transmitted through the surface that the cabinet is sat on is significantly reduced. That's been a particular problem for bassists playing on hollow stages for many years. As castors have less surface area to pass that vibration to the supporting surfaces, standing a cab with castors on a Gramma pad increases the isolation even more. Playing on a concrete floor prevents that 'boom' but you have to tweak your tone controls to get a full bodied bottom end again. What the Gramma pad does is to use soundproof foam (which is what Auralex have made for years) to essentially isolate the cabinet from the supporting surface and give a far more consistent 'tone'. There probably have been measurements to equate this in scientific terms but I've not bothered with them - it just 'works' and I'm happy with it. Quote Link to comment Share on other sites More sharing options...
steve-bbb Posted February 26, 2012 Share Posted February 26, 2012 is this like tena-lady for bass rigs or something ? Quote Link to comment Share on other sites More sharing options...
Dave Tipping Posted February 26, 2012 Share Posted February 26, 2012 [quote name='waynepunkdude' timestamp='1330254700' post='1554568'] I dunno [/quote] It took me a minute to realise this was related to the original post! .. The hookers in Dundee don't look like that! Quote Link to comment Share on other sites More sharing options...
Happy Jack Posted February 26, 2012 Share Posted February 26, 2012 [quote name='Dave Tipping' timestamp='1330265881' post='1554822'] It took me a minute to realise this was related to the original post! .. The hookers in Dundee don't look like that! [/quote] Three for £45? Quote Link to comment Share on other sites More sharing options...
Dave Tipping Posted February 26, 2012 Share Posted February 26, 2012 [quote name='Happy Jack' timestamp='1330271541' post='1554946'] Three for £45? [/quote] .. last I heard the going rate was £10 a h-job £15 a blowy and £20 the lot .. so possibly. Quote Link to comment Share on other sites More sharing options...
Highfox Posted February 26, 2012 Share Posted February 26, 2012 [quote name='Rumple' timestamp='1330255582' post='1554586'] 5 minutes on Basschat on a Sunday morning and I find out there's something else I need to buy, luckily it's not too expensive [/quote] That did for me as well Quote Link to comment Share on other sites More sharing options...
waynepunkdude Posted February 26, 2012 Share Posted February 26, 2012 [quote name='steve-bbb' timestamp='1330263474' post='1554773'] is this like tena-lady for bass rigs or something ? [/quote] It's snake oil for the easily influenced. Quote Link to comment Share on other sites More sharing options...
waynepunkdude Posted February 26, 2012 Share Posted February 26, 2012 [quote name='Dave Tipping' timestamp='1330271909' post='1554952'] .. last I heard the going rate was £10 a h-job £15 a blowy and £20 the lot .. so possibly. [/quote] Do you get a discount because they are Scottish? Quote Link to comment Share on other sites More sharing options...
steve-bbb Posted February 26, 2012 Share Posted February 26, 2012 i think ilike the idea of the cheap and cheerful zigzag foam Quote Link to comment Share on other sites More sharing options...
paul_5 Posted February 26, 2012 Share Posted February 26, 2012 My cab's on castors and standing on a small, hollow stage. I went for the alternative option of filling the cavity under the stage with old duvets etc... it worked for my drummer Quote Link to comment Share on other sites More sharing options...
icastle Posted February 26, 2012 Share Posted February 26, 2012 (edited) [quote name='paul_5' timestamp='1330287238' post='1555304'] My cab's on castors and standing on a small, hollow stage. I went for the alternative option of filling the cavity under the stage with old duvets etc... it worked for my drummer [/quote] How many duvets did you manage to get him to swallow in the end, or did you use the sink plunger and rubber glove method? Edited February 26, 2012 by icastle Quote Link to comment Share on other sites More sharing options...
icastle Posted February 26, 2012 Share Posted February 26, 2012 [quote name='waynepunkdude' timestamp='1330274265' post='1554992'] It's snake oil for the easily influenced. [/quote] I'm an advertisers worst nightmare - I'll question anything and everything and then walk away from their product either because I don't believe the responses or because I'm bored with discussing it with them. I was extremely sceptical until I tried one, but they really do make a noticeable difference - not one of those 'my bass pots are rolled on the naked thighs of young virgins on the night of a full moon' type things either. Quote Link to comment Share on other sites More sharing options...
Dave Tipping Posted February 26, 2012 Share Posted February 26, 2012 [quote name='waynepunkdude' timestamp='1330274306' post='1554994'] Do you get a discount because they are Scottish? [/quote] Nah I think it's largely down to he nick of them and their dependency on heroin. Quote Link to comment Share on other sites More sharing options...
mrtcat Posted February 26, 2012 Share Posted February 26, 2012 Got one and swear by it. When I'm not gigging the sub from my surround sound system sits on it and it really works for that too. Quote Link to comment Share on other sites More sharing options...
stevie Posted February 27, 2012 Share Posted February 27, 2012 I checked the manufacturer's demo, which is interesting. Without the pad, the guitar has noticeable, and not very pleasant, distortion. With the pad, the distortion has cleaned up and the guitar sounds cleaner. Hey ho. The pad reduces distortion as well? And why did the guitarist fiddle with his volume knob while they were adding the pad? And another thing: the OP says the pad made a large difference when playing on a concrete floor. I have no doubt he believes it did, but perhaps someone could explain to me how the airborne vibrations from the bottom of a cabinet could cause several tons of hard, poured concrete to audibly resonate. Quote Link to comment Share on other sites More sharing options...
TRBboy Posted February 27, 2012 Share Posted February 27, 2012 These look really interesting. I've measured my Markbass rig and it would be just a little bit bigger that the Gramma Pad; does anyone know if this would cause a problem? Quote Link to comment Share on other sites More sharing options...
dmccombe7 Posted February 27, 2012 Share Posted February 27, 2012 [quote name='LawrenceH' timestamp='1330207869' post='1554239'] You put your whole bungalow on a gramma pad?! [/quote] Brilliant - like it !!!! Quote Link to comment Share on other sites More sharing options...
dmccombe7 Posted February 27, 2012 Share Posted February 27, 2012 [quote name='TRBboy' timestamp='1330346908' post='1555914'] These look really interesting. I've measured my Markbass rig and it would be just a little bit bigger that the Gramma Pad; does anyone know if this would cause a problem? [/quote] The large version should have fitted ? If not buy 2 Quote Link to comment Share on other sites More sharing options...
dmccombe7 Posted February 27, 2012 Share Posted February 27, 2012 [quote name='Dave Tipping' timestamp='1330271909' post='1554952'] .. last I heard the going rate was £10 a h-job £15 a blowy and £20 the lot .. so possibly. [/quote] Can you give me an address or more details. !!!! LOL (i can't get the smiley faces to attach to the thread - must be a work thingy ) Dave Quote Link to comment Share on other sites More sharing options...
Dave Tipping Posted February 27, 2012 Share Posted February 27, 2012 [quote name='dmccombe7' timestamp='1330348430' post='1555939'] Can you give me an address or more details. !!!! LOL (i can't get the smiley faces to attach to the thread - must be a work thingy ) Dave [/quote] http://maps.google.co.uk/?ll=56.466082,-2.957771&spn=0.001199,0.002411&t=h&z=19 ... they stand on the corner of Blackscroft and Peep O'Day lane .. pretty much every night. It's known locally as "sexy street". Quote Link to comment Share on other sites More sharing options...
dmccombe7 Posted February 27, 2012 Share Posted February 27, 2012 [quote name='Dave Tipping' timestamp='1330349457' post='1555966'] [url="http://maps.google.co.uk/?ll=56.466082,-2.957771&spn=0.001199,0.002411&t=h&z=19"]http://maps.google.c...002411&t=h&z=19[/url] ... they stand on the corner of Blackscroft and Peep O'Day lane .. pretty much every night. It's known locally as "sexy street". [/quote] sounds like a bargain now where is Dundee Dave Quote Link to comment Share on other sites More sharing options...
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