silverfoxnik Posted July 24, 2022 Share Posted July 24, 2022 Hi Folks Are there any Mesa Boogie owners out there who can help me with a couple of questions : First, where's the best place to buy slow-blow fuses for my 2 Mesa amps? I have a Walkabout and Big Block 750. Secondly, I've read on both Talkbass and here on Basschat that the Walkabout will run safely at 2 ohms and just wondered if anyone on here has had experience of doing that safely? Thanks for reading as ever.. 👍 Nik Quote Link to comment Share on other sites More sharing options...
Beedster Posted July 24, 2022 Share Posted July 24, 2022 Walkabout will run at 2ohms apparently but I wouldn’t risk it Nik, they’re not easy to replace or even repair these days 1 Quote Link to comment Share on other sites More sharing options...
Bunion Posted July 24, 2022 Share Posted July 24, 2022 @agedhorseis the man to ask 1 Quote Link to comment Share on other sites More sharing options...
agedhorse Posted July 24, 2022 Share Posted July 24, 2022 Very early on, they were ok at 2 ohms but we had a difficult time getting consistent MOSFETs and through 2 changes of manufacturer it became obvious that they were struggling with the process as well. This resulted in higher than acceptable failure rates into 2 ohms, so we discontinued the 2 ohm acceptable rating. Because these amps are quite expensive to repair (and difficult to get parts) , I would not recommend 2 ohm operation on any of the MOSFET amps. The Subway amps however, are fine with 2 ohms, using the 2 ohm mode switch on the back. Quote Link to comment Share on other sites More sharing options...
silverfoxnik Posted July 25, 2022 Author Share Posted July 25, 2022 Thanks for the feedback, Folks! Point noted about the Walkabout especially @Beedster... And just to be 100% clear, is that also the case with the Big Block 750 @agedhorse? 1 Quote Link to comment Share on other sites More sharing options...
Beedster Posted July 25, 2022 Share Posted July 25, 2022 8 hours ago, agedhorse said: Very early on, they were ok at 2 ohms but we had a difficult time getting consistent MOSFETs and through 2 changes of manufacturer it became obvious that they were struggling with the process as well. This resulted in higher than acceptable failure rates into 2 ohms, so we discontinued the 2 ohm acceptable rating. Because these amps are quite expensive to repair (and difficult to get parts) , I would not recommend 2 ohm operation on any of the MOSFET amps. The Subway amps however, are fine with 2 ohms, using the 2 ohm mode switch on the back. There's been a lot of debate around this issue on various sites, i'd see this post as the definitive answer at last 👍 2 Quote Link to comment Share on other sites More sharing options...
gary mac Posted July 25, 2022 Share Posted July 25, 2022 Nik. I might have a slow blow fuse here. Let me know what rating you need, before you come over to collect your bass and I can check. Quote Link to comment Share on other sites More sharing options...
silverfoxnik Posted July 25, 2022 Author Share Posted July 25, 2022 2 hours ago, gary mac said: Nik. I might have a slow blow fuse here. Let me know what rating you need, before you come over to collect your bass and I can check. Thanks Gary and will do.. 👍 Quote Link to comment Share on other sites More sharing options...
agedhorse Posted July 25, 2022 Share Posted July 25, 2022 8 hours ago, silverfoxnik said: Thanks for the feedback, Folks! Point noted about the Walkabout especially @Beedster... And just to be 100% clear, is that also the case with the Big Block 750 @agedhorse? Yes, and many of these parts are becoming difficult (or impossible) to source because the manufacturers are discontinuing them. 4 ohms is what I would recommend as a safe minimum load. 1 Quote Link to comment Share on other sites More sharing options...
silverfoxnik Posted July 25, 2022 Author Share Posted July 25, 2022 48 minutes ago, agedhorse said: Yes, and many of these parts are becoming difficult (or impossible) to source because the manufacturers are discontinuing them. 4 ohms is what I would recommend as a safe minimum load. Thanks for the clarification and help @agedhorse - really appreciate it! 👍 I really love the sound of these amps, so the last thing I'd want to do is cause them to break down beyond the point of repair. 1 Quote Link to comment Share on other sites More sharing options...
Steve Browning Posted July 25, 2022 Share Posted July 25, 2022 I have a Walkabout 15 and have to agree. A flip-top on steroids. I have a spare Subway 15" 8 ohm speaker and am tempted to install that and see how it works with the TT-800. I'd think about getting a WD-800 to power it. Quote Link to comment Share on other sites More sharing options...
agedhorse Posted July 25, 2022 Share Posted July 25, 2022 30 minutes ago, Steve Browning said: I have a Walkabout 15 and have to agree. A flip-top on steroids. I have a spare Subway 15" 8 ohm speaker and am tempted to install that and see how it works with the TT-800. I'd think about getting a WD-800 to power it. I don't recommend it, the tuning is quite different on the Walkabout. If you do try it, de-rate the Subway driver to about 250-300 watts RMS or you could damage it. 1 Quote Link to comment Share on other sites More sharing options...
Steve Browning Posted July 26, 2022 Share Posted July 26, 2022 8 hours ago, agedhorse said: I don't recommend it, the tuning is quite different on the Walkabout. If you do try it, de-rate the Subway driver to about 250-300 watts RMS or you could damage it. Ok. Thanks for the advice. It will be heeded. 1 Quote Link to comment Share on other sites More sharing options...
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