Dazzlovski Posted May 10, 2012 Share Posted May 10, 2012 (edited) Hi guys/gals This may seem a dumbass question to some, so apologies in advance. I'm currently using two Aguilar 12" + tweeter cabinets, powered by my TC Electronic RH750 amp head. Very portable, plenty loud enough for me and the combination seems to compliment my basses well. Here's the thing. It's not a tall "stack" by any means, and even when I have it perched upon my isolation pad it's not providing much of a monitor for me because its quite low. Would simply adding a third cab to the stack solve my problem, or just create other issues with power output or impedance? The TC amp only has one speaker output therefore I'm daisy-chaining already, so common sense tells me "no problem"..... Would I have to alter the impedance of the two existing cabinets to accommodate No3 ? Comments welcomed. Daz :-) Edited May 10, 2012 by Dazzlovski Quote Link to comment Share on other sites More sharing options...
Alec 'Aleb' Mills Posted May 10, 2012 Share Posted May 10, 2012 unless the TC amp states that it is '2 ohms minimum' then probably not a good idea. =) I guess yours says its '4 ohmns minimum' by the speaker out. I also assume that both your aguilar 12's are 8 ohms each. That means you can't connect more than 2 cabs. Quote Link to comment Share on other sites More sharing options...
Dazzlovski Posted May 10, 2012 Author Share Posted May 10, 2012 Thanks Alec... I assumed my "obvious solution" wasn't going to be that simple. I'll check the amp and cabs, but I can see sense in what you say. Thanks for the advice. Quote Link to comment Share on other sites More sharing options...
Truckstop Posted May 10, 2012 Share Posted May 10, 2012 If you can afford a new Aguilar cab, you can afford a little headphone amp and IEM's! Truckstop Quote Link to comment Share on other sites More sharing options...
Dazzlovski Posted May 10, 2012 Author Share Posted May 10, 2012 Never considered IEM... Good shout . I Like it. Any recommendations ? Quote Link to comment Share on other sites More sharing options...
chris_b Posted May 10, 2012 Share Posted May 10, 2012 Sorry Alec, you are wrong. The TC RH750 is good down to 2.67ohms (look at the online user manual), so it is good with 3 x 8ohm cabs. I tried this with my Bergantino cabs and it worked well. That is why TC created a stir when they claimed that you could link 3 of their cabs but not anyone else’s. Obviously it was marketing smoke and mirrors. [font=Arial][size=2] [/size][/font] Quote Link to comment Share on other sites More sharing options...
thinman Posted May 10, 2012 Share Posted May 10, 2012 Would a stand be cheaper than another cab? A third cab seems like an expensive way of gaining a bit of height or angle. Quote Link to comment Share on other sites More sharing options...
Musky Posted May 10, 2012 Share Posted May 10, 2012 (edited) The RH750 has a minimum load of 2.668 ohms, so connecting three speakers [i]shouldn't[/i] be a problem. I say 'shouldn't' because the 8 ohm figure is a nominal one, so it's just possible you'll run into problems. Edit: Beaten to it as well! Edited May 10, 2012 by Musky Quote Link to comment Share on other sites More sharing options...
Truckstop Posted May 10, 2012 Share Posted May 10, 2012 Come on guys, keep up!! Truckstop Quote Link to comment Share on other sites More sharing options...
xgsjx Posted May 10, 2012 Share Posted May 10, 2012 Another Q here. slightly off topic, but still TC related. See how the RH450 was measured putting out 236 watts at 4Ω, what wattage is it at 2.7Ω? Quote Link to comment Share on other sites More sharing options...
Musky Posted May 10, 2012 Share Posted May 10, 2012 [quote name='xgsjx' timestamp='1336677882' post='1649470'] Another Q here. slightly off topic, but still TC related. See how the RH450 was measured putting out 236 watts at 4Ω, what wattage is it at 2.7Ω? [/quote] No idea, but given that TC reckon there's only 11w difference between 8 ohm and 4 ohm I'd chance an arm and suggest... not a lot! Even more curiously, the RH750 puts out the same 236w at 4 and 8 ohms. Quote Link to comment Share on other sites More sharing options...
chrismuzz Posted May 10, 2012 Share Posted May 10, 2012 [quote name='xgsjx' timestamp='1336677882' post='1649470'] Another Q here. slightly off topic, but still TC related. See how the RH450 was measured putting out 236 watts at 4Ω, what wattage is it at 2.7Ω? [/quote] I really hope it's 450, that would be amusing Quote Link to comment Share on other sites More sharing options...
xgsjx Posted May 10, 2012 Share Posted May 10, 2012 [quote name='Musky' timestamp='1336678246' post='1649477'] No idea, but given that TC reckon there's only 11w difference between 8 ohm and 4 ohm I'd chance an arm and suggest... not a lot! Even more curiously, the RH750 puts out the same 236w at 4 and 8 ohms. [/quote] Now that is rather odd, on both counts! 11w difference? I know watts don't equate to loudness but I thought it was roughly about 1/3 difference between 8Ω & 4Ω. Does the RH750 achieve more volume than the RH450? Quote Link to comment Share on other sites More sharing options...
xgsjx Posted May 10, 2012 Share Posted May 10, 2012 [quote name='chrismuzz' timestamp='1336678310' post='1649482'] I really hope it's 450, that would be amusing [/quote] It would have been! Quote Link to comment Share on other sites More sharing options...
chris_b Posted May 10, 2012 Share Posted May 10, 2012 You will have no problems running 3 8 ohm cabs from an RH750. That is what they have been designed to do. I don't know about the RH450, you can look up the online user manual. The wattage thing is old news. TC processes their signal and boosts it to 450 and 750 watts or the equivalent of those watts in loudness. The RH450 and Staccato are as loud as any 500 watt amp I've owned and the RH750 is very much louder. TC had a lot of people beating them up when these numbers came out. It didn't alter the fact that the volume coming out of the speakers connected to these amps is as loud as TC says. [font=Arial][size=2] [/size][/font] Quote Link to comment Share on other sites More sharing options...
Musky Posted May 10, 2012 Share Posted May 10, 2012 Yep, the wattage thing has been done to death and I think even the naysayers thought they were loud. I just thought it strange that the RH750 produces the same wattage at 4 and 8 ohms. I know the Bass Terror does the same, but that has a switch. Presumably the TC does the same thing but automatically adjusts for impedance??? Quote Link to comment Share on other sites More sharing options...
LawrenceH Posted May 10, 2012 Share Posted May 10, 2012 To the OP, try just tilting the top cab back if you can find a wedge of foam or similar to support it, so it's firing more at your ears! I think this is the second time today I've suggested this, but it's a cheaper than actual chips solution. Quote Link to comment Share on other sites More sharing options...
Dazzlovski Posted May 10, 2012 Author Share Posted May 10, 2012 All good suggestions. Thanks all. I've tried the tilt -thing, and you have to be +30deg to make any difference. Plan A is to borrow another GS112 and give it a whirl and have a check on the TC online manual too. Thanks again... Quote Link to comment Share on other sites More sharing options...
chris_b Posted May 10, 2012 Share Posted May 10, 2012 http://www.tcelectronic.com/media/tc-electronic-power-rating-and-active-power-management.pdf Look at page 7 (last page) minimum load column. 2,66R means 2.6 ohm minimum load. Quote Link to comment Share on other sites More sharing options...
bertbass Posted May 10, 2012 Share Posted May 10, 2012 I say go for the 3 cabs. Makes for a far more enjoyable onstage experience. Quote Link to comment Share on other sites More sharing options...
chris_b Posted May 10, 2012 Share Posted May 10, 2012 [quote name='bertbass' timestamp='1336690502' post='1649735'] ....I say go for the 3 cabs. Makes for a far more enjoyable onstage experience.... [/quote] +1 I've got a 2 ohm compatible amp now and I'm getting a third AE112 this weekend to try the exact same 3 112 cab set up. I'm hoping for success so I can sell some of the cabs taking up space in my back room. Quote Link to comment Share on other sites More sharing options...
Mr. Foxen Posted May 10, 2012 Share Posted May 10, 2012 Don't assume you need to plug the bottom cab in. Quote Link to comment Share on other sites More sharing options...
xgsjx Posted May 11, 2012 Share Posted May 11, 2012 [quote name='chris_b' timestamp='1336684229' post='1649611'] The wattage thing is old news. TC processes their signal and boosts it to 450 and 750 watts or the equivalent of those watts in loudness. The RH450 and Staccato are as loud as any 500 watt amp I've owned and the RH750 is very much louder. TC had a lot of people beating them up when these numbers came out. It didn't alter the fact that the volume coming out of the speakers connected to these amps is as loud as TC says. [/quote] I wasn't rehashing the wattage thing as I know the RH450 is a very loud little box, I was just curious about the output at 2.6Ω. Even if it is 11w more like TC say, there's still more cabs to move more air. The wattage wouldn't stop me buying one (it's lack of money that does that ). You've answered my other Q regarding the RH750. Quote Link to comment Share on other sites More sharing options...
chris_b Posted May 11, 2012 Share Posted May 11, 2012 (edited) I didn't blame TC for the watts thing; they are doing something different which doesn't fit into the current rules, because they were as loud as they said they were even though it didn’t involve the right number of watts. I didn't blame their marketing dept for pulling a fast one on the "2 of your cabs equals 3 of our cabs" sales line, but having just gone through the manual, they are still listing their amps as 4 ohm minimum load except when used with TC cabs. That is wrong, they have admitted its wrong but they are still misleading people. There is a section which is separate to the manual containing the corrected info (2.66R minimum load (that's 2.67 ohm)) but I don't think it's unreasonable, after a year or so, to expect them to have corrected the online manual. Edited May 11, 2012 by chris_b Quote Link to comment Share on other sites More sharing options...
Phil Starr Posted May 11, 2012 Share Posted May 11, 2012 [quote name='Mr. Foxen' timestamp='1336693903' post='1649767'] Don't assume you need to plug the bottom cab in. [/quote] This, I used to put my 4x10 on top of my 1x15 but used the 4 only as it sounded better. Looked impressive, sounded OK and was plenty loud enough.Bloody heavy stand though. You could always build an empty box the same size as your cabs to save weight and money it wouldn't be the first time this has been done.. Quote Link to comment Share on other sites More sharing options...
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