Search found 1380 matches

by stephen sawall
Sat May 30, 2020 9:43 am
Forum: Vintage Amps (Before 1991)
Topic: Need help with my MK IV
Replies: 6
Views: 425

Re: Need help with my MK IV

Never connect the two 4 ohm jacks on the amp to each of the 4 ohm on the speaker cabs. When running two cabs this way it makes a 2 ohm load. The Mark IV isn't designed to run at 2 ohms. ....................... If you want to hear the effects of a mismatch do this. 1)Use one cab only for both example...
by stephen sawall
Sat May 30, 2020 9:25 am
Forum: Vintage Amps (Before 1991)
Topic: Need help with my MK IV
Replies: 6
Views: 425

Re: Need help with my MK IV

I've already explained what to do. But to make it clear.... 1) Use the mono switch on both cabs 2) Use the 16 ohm jacks on both cabs 3) Use the two 4 ohm speaker outputs on the amp. I own a Mark IV and several Marshall speaker cabs with the stereo / mono switch. I have been doing exactly this for th...
by stephen sawall
Mon May 18, 2020 2:51 am
Forum: Rectifier Series
Topic: Dual Rec 2 Channel Rev G settings and questions
Replies: 1
Views: 86

Re: Dual Rec 2 Channel Rev G settings and questions

Rectifier is your typical start everything at noon and tune it to your rig and taste. Red channel I usually start the Presence at 8 or 9 o'clock. That helps tame it a little. Use your Tube Screamer as a clean boost and tighten the bass on the highgain modes. It's pretty much needed to get rid of the...
by stephen sawall
Sun May 17, 2020 2:54 pm
Forum: Mark Series
Topic: Will any EL34/6L6's work in my Mark III?
Replies: 14
Views: 311

Re: Will any EL34/6L6's work in my Mark III?

They need to be in the proper bias range. This isn't a option. Any decent vendor can get you tubes in the proper bias range. Just let them know what amp you are using. Mesa sell tested tubes. Let them know what kind of music and amp and they can give you advice. There is only two factories in the wo...
by stephen sawall
Fri May 15, 2020 10:56 am
Forum: Mark Series
Topic: Mark IV A effects loop
Replies: 11
Views: 241

Re: Mark IV A effects loop

There is no hard rules....but the Rotovibe is a Univibe and all Univibe are a phase shifter. I don't know of any phase shifter designed to be used in the loop of a amp made by anyone. You could always ask Dunlop.
by stephen sawall
Thu May 14, 2020 11:36 pm
Forum: Mark Series
Topic: Mark IV A effects loop
Replies: 11
Views: 241

Re: Mark IV A effects loop

You might want to try one pedal at a time in the loop and see what ones are having a problem. The Rotovibe is basically a phase and probably be best not in the loop. Not sure if the others are line level or not. I always thought of it as the Master also....I just noticed today after reading your pos...
by stephen sawall
Thu May 14, 2020 11:10 am
Forum: Mark Series
Topic: Mark IV A effects loop
Replies: 11
Views: 241

Re: Mark IV A effects loop

The big knob all the way to the right on the front of your amp that says "OUTPUT LEVEL".
by stephen sawall
Wed May 13, 2020 5:10 am
Forum: Mark Series
Topic: Almighty MK IV medium head
Replies: 9
Views: 263

Re: Almighty MK IV medium head

Congratulations
The IV is my favorite Mark.
by stephen sawall
Sat May 09, 2020 5:30 pm
Forum: Vintage Amps (Before 1991)
Topic: Need help with my MK IV
Replies: 6
Views: 425

Re: Need help with my MK IV

You don't want to run into the speaker cab 4 ohms input. Two 4 ohms speakers makes a 2 ohm load. This wouldn't be good for the amp. You want to hook the two 4 ohm Jack's on the amp to the 16 ohm connection on each speaker cab. Two 16 ohm cabs connected this way is 8 ohm load. This is a safe mismatch...
by stephen sawall
Wed May 06, 2020 12:59 pm
Forum: Metallica Sounds
Topic: Metallica speakers
Replies: 55
Views: 36608

Re: Metallica speakers

Just a general history of Celestion... "A Celestion G12 chronology might be of help in sorting things out. WWII- Celestion makes a 12" alnico magnet public address speaker for Royal Navy warships. 1950's- A 12" with alnico magnet called the G12 is developed from the early 12" for musical instrument ...
by stephen sawall
Sat Apr 25, 2020 8:03 am
Forum: Vintage Amps (Before 1991)
Topic: Just bought my first Mesa, a Quad Preamp, struggling to get diverse tones from it.
Replies: 4
Views: 394

Re: Just bought my first Mesa, a Quad Preamp, struggling to get diverse tones from it.

Why do you feel the need to have the Treble Knob set high always ??? Is the rest of you gear extremely dark ??? A lot of the versatility is push-pull knobs,Treble Shift, Lead Bright, Bright, Bass Shift and Deep. Different GEQ settings. Setting the Gain and Drive levels at very different settings. Th...
by stephen sawall
Mon Apr 20, 2020 11:16 am
Forum: Mark Series
Topic: The Mark IV thread....!!
Replies: 735
Views: 298528

Re: The Mark IV thread....!!

I'm more interested in the circuit similarities ? The evolution of the Mark series. I have been looking at the similar circuit on the various Mark and Rectifier series. Like the Presence pushed in on the Mark IV is similar to the Red on the Rectifier in that it is bypassing the typical depth and pre...
by stephen sawall
Sun Apr 19, 2020 4:27 pm
Forum: Mark Series
Topic: The Mark IV thread....!!
Replies: 735
Views: 298528

Re: The Mark IV thread....!!

When the Mid Gain / Harmonics switch is set to Mid Gain does it make the circuit similar to a IIC++ and III++ ????