Cabinets/Speakers/Watts/Ohms/Stereo/Mono...etc...

Q & A on technical issues concerning music equipment, electronics, sound, recording, computers, gaming, the internet, etc.

Moderators: Ron, Jim Price

User avatar
Ron
Site Admin
Site Admin
Posts: 2034
Joined: Saturday Dec 07, 2002
Location: State College, PA

Post by Ron »

metalchurch wrote:Actually, no you didn't confuse me, that made perfect sense.

You said that if I used both speaker outputs of my poweramp into my cab, that I'd be pushing 100w from each side. So that would be 200w total.
If I split my cab to 8ohm, it would be rated at 150w@8ohm.
So then 2 speakers from my cab would get a full 100w from the amp, and the other 2 speakers would get the other 100w from the other speaker out.

As long as I'm powering the cab below the speakers max watt rating, I'm safe right?

My Engl preamp has a stereo mode, but I'm running a straight mono signal throughout the rig. That was an excellent catch Ron, I totally forgot that in order to take advantage of true stereo mode, the rest of the rig should be wired as such.

That's also a good idea to run a small monitor off of the #2 speaker out.
I think you've got it. You should be fine running 150w rated speakers with 100w. Especially since it's tube power, when tubes clip they don't produce a hard edge like solid state amps do, so they are easier on the speaker drivers.

Another word of advice... never run either channel of your Marshall into less than an 8 ohm load. That's why some people can still manage to destroy a tank like that.
... and then the wheel fell off.
User avatar
orangekick
Platinum Member
Platinum Member
Posts: 778
Joined: Monday Dec 13, 2004
Location: Johnstown

Post by orangekick »

Ron wrote:The split 8 ohm setup would allow you to use both channels of the amp, thus doubling the power output of the rig, but do you really need 200w of tube power?
I'd love to have 200 watts of tube power for live gigs. :twisted:
User avatar
Ron
Site Admin
Site Admin
Posts: 2034
Joined: Saturday Dec 07, 2002
Location: State College, PA

Post by Ron »

orangekick wrote:
Ron wrote:The split 8 ohm setup would allow you to use both channels of the amp, thus doubling the power output of the rig, but do you really need 200w of tube power?
I'd love to have 200 watts of tube power for live gigs. :twisted:
Huh? What'd you say? :wink:
... and then the wheel fell off.
User avatar
metalchurch
Diamond Member
Diamond Member
Posts: 3719
Joined: Friday Feb 09, 2007
Location: Somerset

Post by metalchurch »

That's one reason that I fell in love and kept this Marshall, it is so versatile, and like Lonewolf pointed out, it is indeed a MonoBloc system, which means that it is essentially 2 amps in 1: Side A and Side B.

Each side has a Gain knob,a Presence knob, and a toggle switch that's marked 'A/B' to chance the voicing of the tubes.

-Toggle flipped to 'A' is more mellow,with less Gain, and almost like it's running on 2 out of the 4 powertubes. (Not sure exactly how the sound changes, that's just my perception of it)

-Toggle on 'B' is full on assault!, there's a dramatic volume and gain difference between A&B.

Each side has this A&B toggle, not to confuse it with literally switching between Side A and Side B.

Eventually, I will have my Side B retubed with another brand of tubes, for a different flavor or sound. So you guys can see the tonal options that i have.
+ if one side goes down while playing out, all I have to do is plug it all into Side B and I'm up and running again.

And now I'm learning more about the mono/stereo and splitting the cabs and whatnot, there's more to this than I even realized.
JackANSI
Diamond Member
Diamond Member
Posts: 1322
Joined: Friday May 16, 2008
Location: Workin' in a Soylent factory, Waitin' for the Malthusian catastrophe.

Post by JackANSI »

I bet that thing weighs a ton...
User avatar
metalchurch
Diamond Member
Diamond Member
Posts: 3719
Joined: Friday Feb 09, 2007
Location: Somerset

Post by metalchurch »

I think it's between 65-70 pounds by itself.
Used to have it in a 10 space rack with all 10 spaces used up, but it weighed almost as much as me, I'm about 150 soaking wet :lol:
User avatar
lonewolf
Diamond Member
Diamond Member
Posts: 6249
Joined: Thursday Sep 25, 2003
Location: Anywhere, Earth
Contact:

Post by lonewolf »

metalchurch wrote:I think it's between 65-70 pounds by itself.
Used to have it in a 10 space rack with all 10 spaces used up, but it weighed almost as much as me, I'm about 150 soaking wet :lol:
You need a Gator Rolling rack.
...Oh, the freedom of the day that yielded to no rule or time...
User avatar
onegunguitar
Diamond Member
Diamond Member
Posts: 2080
Joined: Wednesday Aug 10, 2005
Contact:

Post by onegunguitar »

lonewolf wrote:
metalchurch wrote:I think it's between 65-70 pounds by itself.
Used to have it in a 10 space rack with all 10 spaces used up, but it weighed almost as much as me, I'm about 150 soaking wet :lol:
You need a Gator Rolling rack.
Naw,he just needs an ENGL PowerBall :wink: :wink:
http://www.myspace.com/musicnaildriver
get on your knees and bow
or learn a lesson in violence
Post Reply