Members Karma1 Posted February 23, 2009 Members Share Posted February 23, 2009 I have a Marshall 8040 combo (Valvestate) with a 12" Celestion G12L rated at 4 ohms. I've read some of the user reviews on this amp here on Harmony Central and a few of them mentioned putting a Celestion Vintage 30 in theirs and liking the improvement. However, I haven't been able to find a 4 ohm Vintage 30, they seem to 8 or 16 ohms. What's the possibility of using an 8 ohm speaker in the amp? I may be mistaken, but I think I remember reading that the mismatch is a more of a problem if it's a tube amp, and this is basically solid state other than single 12ax7 in the preamp for the drive channel. I'm warming up the clean and overdrive sound a bit with a Mesa Boogie V-Twin tube preamp pedal in front of the amp and it sounds pretty good, but I think a speaker upgrade would make a nice difference. I'm also open to other speaker suggestions. Thanks. Link to comment Share on other sites More sharing options...
Members HKSblade1 Posted February 23, 2009 Members Share Posted February 23, 2009 You are going higher in ohms. Should be fine. Lower would be bad Just make sure the speaker you change has the right power capacity. IOW don't use a 120W speaker Link to comment Share on other sites More sharing options...
Members left hand path Posted February 23, 2009 Members Share Posted February 23, 2009 I would read the owners manual or call customer support before connecting an 8 ohm speaker to a 4 ohm SS but usually it isn't a big deal running a solid state through the right impedence speaker. I sometimes run a 4 ohm crate through a 16 ohm cab and it hasn't done anything to the transformer. as for any other speakers, I'm not sure of any good 4 ohm speakers unless you link two 8 ohms in parallel. Eminence would be a good company to look at for a speaker though, their site and customer support are very helpful Link to comment Share on other sites More sharing options...
Members GCDEF Posted February 23, 2009 Members Share Posted February 23, 2009 You didn't like the answers the first time you asked?http://acapella.harmony-central.com/forums/showthread.php?t=2251381 Link to comment Share on other sites More sharing options...
Members HKSblade1 Posted February 23, 2009 Members Share Posted February 23, 2009 Link to comment Share on other sites More sharing options...
Members Casey4s Posted February 23, 2009 Members Share Posted February 23, 2009 If you have SS output you can easily go a to a step higher in impedance with your speaker speaker, but it will reduce your output wattage by almost half. Link to comment Share on other sites More sharing options...
Members HKSblade1 Posted February 23, 2009 Members Share Posted February 23, 2009 maybe not vol (db) of an amp 50w is not much different than @ 100w amp 8 Ohm might see some vol change but not as much if he went 16. It also depends on the speaker design too. Better efficiency compared to what was in there orig may prove to not lose too much on the vol side. Link to comment Share on other sites More sharing options...
Members karlw Posted February 23, 2009 Members Share Posted February 23, 2009 maybe not vol (db) of an amp 50w is not much different than @ 100w amp 8 Ohm might see some vol change but not as much if he went 16. It also depends on the speaker design too. Better efficiency compared to what was in there orig may prove to not lose too much on the vol side. True - even though it will be approx. 1/2 the power, it takes something like 1/10th the power for it to sound half as loud to the ear. Does anyone even make a 40 Ohm speaker? Link to comment Share on other sites More sharing options...
Members Karma1 Posted February 23, 2009 Author Members Share Posted February 23, 2009 You didn't like the answers the first time you asked?http://acapella.harmony-central.com/forums/showthread.php?t=2251381 Just wanted some other perspectives and have already gotten some good responses and useful info here. I'm also interested in other forumite's speaker recommendations besides the Vintage 30. Link to comment Share on other sites More sharing options...
Members tlbonehead Posted February 24, 2009 Members Share Posted February 24, 2009 maybe notvol (db) of an amp 50w is not much different than @ 100w amp8 Ohm might see some vol change but not as much if he went 16. It also depends on the speaker design too. Better efficiency compared to what was in there orig may prove to not lose too much on the vol side.Casey said wattage, not volume, which he was dead-on. Link to comment Share on other sites More sharing options...
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