Chest Rockwell Posted July 4, 2011 Share Posted July 4, 2011 ok, thanks guys! I think the onus is on me to go and do my own homework as to [i]why [/i] electronics/physics works like this so I'll go and do that, but many thanks for the clarifications I'm sure my mate will offer, in the cold light of day and without 5 beers under his belt, an 'aaah you didnt say that', even though I told him the full details, but I will now be pushing both cabs at practice (at 4ohms!) and see how they go. cheers! Quote Link to comment Share on other sites More sharing options...
alexclaber Posted July 4, 2011 Share Posted July 4, 2011 I'll be interested to hear the results of that! I suspect that using the SP212 and Compact together will be quieter than the Compact on its own. If it isn't then there's probably something funny going on with the impedance switch. Quote Link to comment Share on other sites More sharing options...
Bankai Posted July 4, 2011 Share Posted July 4, 2011 (edited) [quote name='alexclaber' post='1291927' date='Jul 4 2011, 11:07 AM']I'll be interested to hear the results of that! I suspect that using the SP212 and Compact together will be quieter than the Compact on its own. If it isn't then there's probably something funny going on with the impedance switch.[/quote] But surely the same wattage going into 2 cabs will be louder than 1 due to moving more air? (put in a very simple way!) Edited July 4, 2011 by Bankai Quote Link to comment Share on other sites More sharing options...
Chest Rockwell Posted July 4, 2011 Share Posted July 4, 2011 (edited) if anyone can make it to the welsh valleys this week, i'll be charging £5 entry, you guys can come and find out i'll tell you this tho, The Compact isnt going anywhere, it's a lot lighter! Edited July 4, 2011 by Chest Rockwell Quote Link to comment Share on other sites More sharing options...
clauster Posted July 4, 2011 Share Posted July 4, 2011 [quote name='Bankai' post='1291939' date='Jul 4 2011, 11:13 AM']But surely the same wattage going into 2 cabs will be louder than 1 due to moving more air? (put in a very simple way!)[/quote] Normally, yes. But thanks to the impedance selecter on the OTB you can get fill power at either 4ohm or 8 ohm loads. 500W into the efficient Barefaced cab = Loud 500W split between the Barefaced (now receiving 250W) and the not so efficient isobaric cab (also receiving 250w) = not so loud. Quote Link to comment Share on other sites More sharing options...
alexclaber Posted July 4, 2011 Share Posted July 4, 2011 [quote name='Bankai' post='1291939' date='Jul 4 2011, 11:13 AM']But surely the same wattage going into 2 cabs will be louder than 1 due to moving more air?[/quote] It would normally. But it's either 500W into a cab that's 98dB sensitivity (@ 100Hz) or 250W into a 98dB sensitivity cab plus 250W into a 89dB sensitivity cab. 98dB + 500W = 125dB (98dB + 250W = 122dB) + (89dB + 250W = 113dB) = ~123dB That's in the lows. Who knows what is going on higher up because isobaric designs are normally only used for bass (i.e. true woofer & subwoofer) purposes! Quote Link to comment Share on other sites More sharing options...
Chest Rockwell Posted July 4, 2011 Share Posted July 4, 2011 hmm, for some reason I figured that'd be the case. i'm curious about tone really. I never go past 5 and 4 on volume/gain anyway, so can just push the volume up a little and see how the sounds balance. to be honest the SP is more of a luxury! the compact will always be my leave the house cab, cos it's so easy to move around and does the job just fine! Quote Link to comment Share on other sites More sharing options...
Bankai Posted July 4, 2011 Share Posted July 4, 2011 [quote name='alexclaber' post='1291957' date='Jul 4 2011, 11:25 AM']It would normally. But it's either 500W into a cab that's 98dB sensitivity (@ 100Hz) or 250W into a 98dB sensitivity cab plus 250W into a 89dB sensitivity cab. 98dB + 500W = 125dB (98dB + 250W = 122dB) + (89dB + 250W = 113dB) = ~123dB That's in the lows. Who knows what is going on higher up because isobaric designs are normally only used for bass (i.e. true woofer & subwoofer) purposes![/quote] I thought you were talking about running the compact on it's own on 4 ohms as well, meaning it'd be getting 250W either way! Quote Link to comment Share on other sites More sharing options...
deaky Posted July 4, 2011 Share Posted July 4, 2011 Geddy likes em :-) Quote Link to comment Share on other sites More sharing options...
waynepunkdude Posted July 5, 2011 Share Posted July 5, 2011 So with a single 8OHM 400W cab what ohmage setting should I have it at? Quote Link to comment Share on other sites More sharing options...
yorick Posted July 5, 2011 Share Posted July 5, 2011 [quote name='waynepunkdude' post='1294080' date='Jul 5 2011, 10:34 PM']So with a single 8OHM 400W cab what ohmage setting should I have it at?[/quote] Run it at 8 ohms, but dont run it full on........ You'll have have more than enough headroom around half volume!!! Nige Quote Link to comment Share on other sites More sharing options...
waynepunkdude Posted July 6, 2011 Share Posted July 6, 2011 What would I get though an 8OHM cab if I put in 4OHM mode? Quote Link to comment Share on other sites More sharing options...
Bankai Posted July 6, 2011 Share Posted July 6, 2011 Half of the total wattage, so 250W. Quote Link to comment Share on other sites More sharing options...
waynepunkdude Posted July 6, 2011 Share Posted July 6, 2011 [quote name='Bankai' post='1295076' date='Jul 6 2011, 07:14 PM']Half of the total wattage, so 250W.[/quote] So at lower volumes that'd be safer? Quote Link to comment Share on other sites More sharing options...
Happy Jack Posted July 6, 2011 Share Posted July 6, 2011 Speaking as a complete novice in these matters, Wayne, I just follow Alex's advice from many moons ago. If it's an 8 Ohm cab, then set your amp to 8 Ohms. Turn up the volume to the desired level, If the cab starts making horrible and/or farty noises, just turn it down until the noise stops. I don't see the point in deliberately removing a large chunk of your amp's output, and with it the headroom that most people find an OBT offers. Quote Link to comment Share on other sites More sharing options...
Low End Bee Posted July 6, 2011 Share Posted July 6, 2011 I run mine at 8ohms through an 8ohm 200w TC cab at rehearsals. No problems at all. Quote Link to comment Share on other sites More sharing options...
algmusic Posted July 7, 2011 Share Posted July 7, 2011 [quote name='Low End Bee' post='1295114' date='Jul 6 2011, 07:59 PM']I run mine at 8ohms through an 8ohm 200w TC cab at rehearsals. No problems at all.[/quote] Exactly It's very simple really..[size=4] listen to your cab[/size].. if you hear fartting.. turn it down.. I always find it funny how people blow a speaker, unless there was a fault with the amp. I've used a 500w amp through a 150 speaker at 4 ohms Quote Link to comment Share on other sites More sharing options...
Chest Rockwell Posted July 8, 2011 Share Posted July 8, 2011 dunno where to say this, but I finally had both the Barefaced Compact AND the Orange SP212 running at 4ohm from the OTB. PHAT!!!!!!!!!!!!! only needed a tad more volume to meet the normal Compact output (not a scientific term, more of a 'jeez, that's bloody loud!'). it's very cool to see your guitarists stare at your cabs with wide eyes, amazed that so much volume and power can come out of such small gear. I still had the OTB around 4/10 on gain and volume as it was just too overpowering otherwise. insane heavy volume through these cabs, chuffed!! Quote Link to comment Share on other sites More sharing options...
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