silverfoxnik Posted February 2, 2019 Share Posted February 2, 2019 (edited) Morning Folks Hope the weather is treating you OK wherever you are... So, I have a Luddite ohmage question about whether or not it would be safe or not to pair my Ampeg V4BH valve head with my Epifani 310 cab. Most of the time, I run the Ampeg with its matching 210 and 115 cabinets and it sounds absolutely glorious to me.. But at approx 60lbs each, it's a lot of weight when carrying both cabs around all the time. It does sound good when just using one of the cabs as well, especially the 115, but I have got very used to that full rig tone and (dare I say it) 'Heft'. 😀 And this is where the Epi 310 comes in - it's a beautiful sounding cab and really lightweight and, if I could run it safely with the V4BH, I think it could give me another more portable option for certain gigs and rehearsals without losing too much sound-wise. Like most valve amps, the V4BH has a switch that allows you to run it with cabs at either a total resistance of 4 ohms or 8 ohms. Now, to my Luddite brain, the way this is designed tends to make me think it's either got to be one ohmage setting or the other - or else you run the risk of major amp output transformer melt down!! However, the Epifani is rated at 5.5 ohms. So my question is: If I set the Ampeg to the 4 ohm setting, will that work OK with the Epi or will it cause a problem because it's not a precise match? Any pearls of wisdom and/or technical insight would be very gratefully received and much appreciated! Thanks for reading... 😊 Nik Edited February 3, 2019 by silverfoxnik Title change Quote Link to comment Share on other sites More sharing options...
ikay Posted February 2, 2019 Share Posted February 2, 2019 According to this TB thread, a good rule of thumb is to treat the Epi 310 as if it was a 4 ohm cab: - https://www.talkbass.com/threads/epifani-ul2-310-ohms.1313100/ Set your amp to 4 ohms and it will be fine with a cab that's rated at 4 ohms or above (but not below) so will be ok with the epi. 1 Quote Link to comment Share on other sites More sharing options...
silverfoxnik Posted February 2, 2019 Author Share Posted February 2, 2019 (edited) Thanks for the reply @ikay 😊 I'll check out the TB thread now! Edited February 2, 2019 by silverfoxnik Quote Link to comment Share on other sites More sharing options...
silverfoxnik Posted February 3, 2019 Author Share Posted February 3, 2019 Just changed the title on this to hopefully attract some further input.. Thanks Nik Quote Link to comment Share on other sites More sharing options...
Chimike Posted February 3, 2019 Share Posted February 3, 2019 Important to realise that the talk bass link was referring to a solid state amp, not valve , so does not apply in this case . Could try Yampeg service dept, they've been very helpful in the past. 1 Quote Link to comment Share on other sites More sharing options...
obbm Posted February 3, 2019 Share Posted February 3, 2019 It will be absolutely fine on the 4-ohm setting Nik. BTW the correct term is impedance, the word ohmage does not exist. 😉 1 1 Quote Link to comment Share on other sites More sharing options...
silverfoxnik Posted February 3, 2019 Author Share Posted February 3, 2019 1 hour ago, obbm said: It will be absolutely fine on the 4-ohm setting Nik. BTW the correct term is impedance, the word ohmage does not exist. 😉 @obbm - Thanks Dave.. I said I was Luddite in my post! 😁 @Chimike - Thats why I came back this morning to double-check if it was OK. Appreciate the help everyone.. Being able to use the V4BH and the Epi will make a real difference on some gigs, that's for sure. 😊 Quote Link to comment Share on other sites More sharing options...
Ricky 4000 Posted February 3, 2019 Share Posted February 3, 2019 (edited) 1 hour ago, obbm said: It will be absolutely fine on the 4-ohm setting Nik. BTW the correct term is impedance, the word ohmage does not exist. 😉 That's what I wanted to reply earlier, but felt totally unqualified to do so. @silverfoxnik , the Ampeg FAQ: https://ampeg.com/faq.html and Epi' FAQ: https://www.epifani.com/faq/ both have some guidance on the subject of impedance (and also, speaker load in relation to Ampeg valve amps is covered in the Ampeg FAQ). 👍 Would I be right to assume that Nik's 5.5 ohm cab' might be a fair bit quieter than a 4 ohm cab? Edited February 3, 2019 by Ricky 4000 Quote Link to comment Share on other sites More sharing options...
silverfoxnik Posted February 3, 2019 Author Share Posted February 3, 2019 @Ricky 4000 - thanks for the links.. I'll have read through them.. 😊 Quote Link to comment Share on other sites More sharing options...
stewblack Posted February 3, 2019 Share Posted February 3, 2019 + While we're talking valves and ohmageosity, and indeed Ampegitude, would I be right in saying that flick the ohmageation switch on the back of my Classic from 4 impedences to 2 impedences and I'd be Ok running three 8 ohm cabs paralleled up via their in / out link sockets on the backs? 1 Quote Link to comment Share on other sites More sharing options...
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