noirpunk Posted May 21, 2009 Share Posted May 21, 2009 Hi, This is going to sound pretty dumb but I've got a cabinet with 2 x 10 inch speakers running at 8ohms and 75 watts a piece. Does this make the cab run at 150 watts total? Also is the ohmage 8? I've bought a new 6 string head with an ohmage selector and don't want to end up blowing the cab/head. Also I have a head that runs ar 10 ohms, could I safely use this with the cabinet mentioned? Quote Link to comment Share on other sites More sharing options...
umph Posted May 21, 2009 Share Posted May 21, 2009 [quote name='noirpunk' post='494281' date='May 21 2009, 02:29 PM']Hi, This is going to sound pretty dumb but I've got a cabinet with 2 x 10 inch speakers running at 8ohms and 75 watts a piece. Does this make the cab run at 150 watts total? Also is the ohmage 8? I've bought a new 6 string head with an ohmage selector and don't want to end up blowing the cab/head. Also I have a head that runs ar 10 ohms, could I safely use this with the cabinet mentioned?[/quote] the cab will either be 4 or 16 ohms depending on how you wired it and you just want the head to match the ohmage of the cab. Quote Link to comment Share on other sites More sharing options...
noirpunk Posted May 21, 2009 Author Share Posted May 21, 2009 [quote name='umph' post='494286' date='May 21 2009, 02:32 PM']the cab will either be 4 or 16 ohms depending on how you wired it and you just want the head to match the ohmage of the cab.[/quote] Ok if I upload a pic of the wiring would you be able to tell what ohmage it is? From what I guess it's one input to the two speakers. Basically it's an old Peavey 2x10 cabinet I got given by a family friend, it's been upgraded with eminence speakers. Quote Link to comment Share on other sites More sharing options...
Bill Fitzmaurice Posted May 21, 2009 Share Posted May 21, 2009 [quote name='umph' post='494286' date='May 21 2009, 09:32 AM']ohmage[/quote]Impedance. Quote Link to comment Share on other sites More sharing options...
noirpunk Posted May 21, 2009 Author Share Posted May 21, 2009 I also have an 8ohm 1000 watt monitor speaker that I intend to use as a cab for a bass head. The head runs at 10 ohms and 500 watts, so would this monitor be safe to use? Quote Link to comment Share on other sites More sharing options...
BOD2 Posted May 21, 2009 Share Posted May 21, 2009 Check out this artickle for information about wiring speakers [url="http://wiki.basschat.co.uk/info:amps:impedance_and_wattage"]http://wiki.basschat.co.uk/info:amps:impedance_and_wattage[/url] See if you can identify which method (parallel or series) you used to wire your speakers. Also, this head that runs at 10 ohms... that's an unusual value. What make/model is the head ? (this will help answer your original question) Quote Link to comment Share on other sites More sharing options...
noirpunk Posted May 21, 2009 Author Share Posted May 21, 2009 The bass head is the Ashdown Superfly, I've read that it runs at 10 ohms which really confused me. The guitar head is the Blackheart Handsome Devil, modified by Rat Valve Amps - has a selectable impedance switch on the back for 4, 8 and 16 ohms. Quote Link to comment Share on other sites More sharing options...
BOD2 Posted May 21, 2009 Share Posted May 21, 2009 Ashdown Superfly ? This one .... [url="http://www.ashdownmusic.com/bass/detail.asp?ID=156"]http://www.ashdownmusic.com/bass/detail.asp?ID=156[/url] That has two separate power amp outputs - 2 x 250 Watts into 4 ohms. That means you can attach a 4 ohm cabinet to each of the speaker and get 250 Watts. Since it's a solid state amp, you can safely attach a higher impedance cabinet (e.g. 8 ohms) but you'll get a bit less power. Don't attach anythingh less than 4 ohms, though. The guitar amp is a valve amp so you MUST attach the correct impedance cabinets to the speaker outputs or you risk damaging the output transformer (expensive !). Quote Link to comment Share on other sites More sharing options...
Kongo Posted May 21, 2009 Share Posted May 21, 2009 [quote name='noirpunk' post='494281' date='May 21 2009, 02:29 PM']Also is the ohmage 8?[/quote] [quote name='Bill Fitzmaurice' post='494296' date='May 21 2009, 02:37 PM']Impedance.[/quote] Could be worse...coulda said "Pwmage"!!! Quote Link to comment Share on other sites More sharing options...
noirpunk Posted May 21, 2009 Author Share Posted May 21, 2009 [quote name='BOD2' post='494424' date='May 21 2009, 04:25 PM']Ashdown Superfly ? This one .... [url="http://www.ashdownmusic.com/bass/detail.asp?ID=156"]http://www.ashdownmusic.com/bass/detail.asp?ID=156[/url] That has two separate power amp outputs - 2 x 250 Watts into 4 ohms. That means you can attach a 4 ohm cabinet to each of the speaker and get 250 Watts. Since it's a solid state amp, you can safely attach a higher impedance cabinet (e.g. 8 ohms) but you'll get a bit less power. Don't attach anythingh less than 4 ohms, though. The guitar amp is a valve amp so you MUST attach the correct impedance cabinets to the speaker outputs or you risk damaging the output transformer (expensive !).[/quote] Cheers for that, I really couldn't get my head around it. When I get a chance to open up my cab I'll post up how it's wired, the two speakers are Eminence LE10-50s, 8ohms from what I've read. Thanks very much for the help. Quote Link to comment Share on other sites More sharing options...
Mr. Foxen Posted May 21, 2009 Share Posted May 21, 2009 [quote name='Bill Fitzmaurice' post='494296' date='May 21 2009, 02:37 PM']Impedance.[/quote] Nominal impedance. Quote Link to comment Share on other sites More sharing options...
umph Posted May 21, 2009 Share Posted May 21, 2009 [quote name='Bill Fitzmaurice' post='494296' date='May 21 2009, 02:37 PM']Impedance.[/quote] i didn't want to confuse him ;< Quote Link to comment Share on other sites More sharing options...
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