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It's a great amp.

Madison Square Garage?

Pedals I've tried our are a DigiTech Digiverb, a Koko space reverb, a Boss Tera Echo, Boss GE-7, a DigiTech Hyper Phase and a cheap Chinese volume pedal. All with the same results. I've run the pedals by themselves off an independent boss power supply, as well as two or three on a daisy chain...

A single cable end into the send creates a massively loud hum, single into the return is fine. Jumping the loop is also fine. Any modulation, time based or volume pedal I put through the loop and the amp gets noisy, loses output and totally flattens out sound wise.

From day one, the loop has been terrible. Whenever I put a pedal in the loop, the amp's output is diminished, and noise and hum gets introduced. I've changed the effects loop tube, with no change. I also get a lot of RFI as soon as I put a pedal into the loop. None of this happens when I plug...

Black plaid is right, replace each tube one by one with a known working tube. V1 is the tube closest to the input jack.

These were recorded seconds apart with my phone leaning against the front of each speaker baffle. Same settings, same guitar. Seconds apart, two different cabinets. I should have done some repetitive chords or at least something less random and erratic. Maybe I'll redo them when I feel...

With the speaker talk surrounding this amp lately I made two quick videos of the speakers I'm currently using with my MT15. Each speaker is in its own separate 112 cab. Tones are high gain at TV/bedroom levels.

V30 was never called a high wattage Greenback. V30 is a modernized high wattage Alnico Blue. Believe it or not, back in the day, Celestion marketed the G12T-75 as a "high power Greenback" Which again...it is not.

Oh sorry I was listening to future barbarians video. I don't hear anyting in your video that would cause any concern. Am I missing something or just not hearing it maybe?

No, mine only had a hum when taken off standby. It was louder than a normal amp operation hum. It has since diminished. I noticed your noise was only present on the lead channel and went away when you switched to the clean channel?

I should add that as you can tell, I'm using these two speakers in order to create a wider and larger layered tone. A modern voiced speaker and a vintage voiced speaker used together. If left with only wanting to use one, or only having one... I can't say that I'd use either one alone. Look for...

Greenback wattage will be fine but it will still have a lot of mids like a V30, and it will have less clarity when pushed and more crunch. I've actually found that the G12T75 sounds really good with the MT15. Its a speaker that sounds huge in a 112 cabinet. Even though it's mids are scooped...

Once I replaced the stock JJ in the effects loop preamp spot with a Sovtek, the idling noise and radio station phenomenon went away.

While the MT15's clean channel volume taper is near perfect.... Are they different values? Could the two be swapped? I have a pretty steady hand and get by fine with the gain channel volume jump. But I literally have to tap the top of the volume dial with my index finger to get bedroom/living...

The swap was successful. More of a grainy, biting gain, instead of the smooth, dark gain that it was. The gain is more reminiscent of a modern Marshall mixed with a Recto. It kind of abandoned that stiff, urgent Uberschall quality. I'm getting some really nice Adam Jones type crunch and...

I wanted to relieve some of the stiffness and darkness and add some high end crispness to the preamp voicing so changed V1 to a Tungsol, and put EH 12AX7s in V3 & V4. V5 & V2 are still JJs. V6 is a Mesa labeled Sovtek, only due to the stock JJ going microphonic.

It really is something. Although the Jensen copy is known for use with Fender circuits, and I bought it for my clean ambient delay/echo/reverb playing, the WGS site demo clips of the G12C with gain really impressed me. This is the MFV30 (Mode Four) I have in the other cab. It's another...

I've since done some speaker experimenting and I'm now using a Marshall MFV30 and a WGS G12C in each of my 1x12 cabs. I like this combination best so far. The MFV30 is thick and smooth, yet cutting. The G12C has more modest lows and a very clear and a peaky highend that's not shrill or fizzy...

I'm on the top floor up of a 4 level apartment. My MT15 was picking up RFI when I used the effects loop. The loop was also very noisy whenever it was activated. I replaced the designated effects loop 12AX7 and the problem went away.