Mesa 395 Questions - Speaker load & fuse values

Triaxis, Quad Preamp, Stereo Power series, Recto Preamp

Moderators: Guitarzan, Grandor, ned

Post Reply
The Casual Doctor
Bottle Rocket
Posts: 4
Joined: Fri Jan 12, 2018 3:52 am

Mesa 395 Questions - Speaker load & fuse values

Post by The Casual Doctor » Mon Nov 12, 2018 4:27 am

Hi all

I'm the proud new owner of a Mesa Triaxis and a 395 power amp. I've found my tone, that's all I'll say. I'll save gushing for another post!

I have some questions, if anyone can be of assistance:

Firstly, I don't need the full power compliment of the 395 all of the time. I'd love to be able to switch one side off and use the other, but that's obviously not possible. I've seen people reference Mesa stereo power amps being able to not have a load on one side, provided the volume is down and the presence is up. Is this possible with the 395, and does it even save enough on wear and tear to be worth it?

Secondly, I was running a single 4 ohm load on each channel. I tried a pair of 2x12s at 8ohms a piece, and I blew the mains fuse. Could this be a bad 8 ohm output?

Lastly, I did notice the fuse blew immediately upon powering up, before standby was disengaged. This doesn't seem like slow-blow behavior to me, nor does it seem like power tube problems, so perhaps the fuse was incorrect? I can't find literature stating the required fuse, but this one was 4A.

Thanks in advance!

User avatar
jediguitarist
Mark II
Posts: 127
Joined: Fri Nov 16, 2012 4:55 pm
Location: East Coast, New Jersey

Re: Mesa 395 Questions - Speaker load & fuse values

Post by jediguitarist » Wed Nov 14, 2018 12:58 pm

You can't turn on just one side?

I run a Simul 295 with one 8ohm cab, but I'll alternate each side every few gigs/sessions/practices.

The mains fuse holder should be labeled but it's a 6a SB fuse.

93 97 98 PRS CE24
94 98 G&L Legacy
94 G&L ASAT Special
95 G&L S-500
99 Peavy Wolfgang
11 Gibson LP Studio 60

69 Bandmaster Head
88 Quad Pre
91 & 92 Simul 295
92 DC-5
96 Mark IV Maple/Wicker
98 5150 combo
08 Mark IV Wide

The Casual Doctor
Bottle Rocket
Posts: 4
Joined: Fri Jan 12, 2018 3:52 am

Re: Mesa 395 Questions - Speaker load & fuse values

Post by The Casual Doctor » Thu Nov 15, 2018 2:06 am

I can leave it on standby, but technically it's still "on"... I've never had a stereo power amp before, so I've never actually even researched if it's OK to leave an amp on standby without load- from the sounds of things, it's fine?

Oh, and regarding the amp- I see now the 6A on the front panel is blacked out. I'm in a 230V region, so the fuse current rating is roughly halved, 3A it is!

Post Reply