M800+ - Phaez Amplification

The M800+ has been one of my most popular models over the past year. What is heart of the M800+? JCM. And then some.

The Pasadena, SIBLY, and M50X, should all be considered precursors to the M800+

The M800+ is truly world class. What are the output stage options? You can have:

These 2 below are going to be the most popular:

Pair of EL84’s for about 20W

Pair of EL34’s for about 25W (lower B+)

Also:

Pair of 6V6’s for about 20W

Pair of EL34’s for about 40W (medium B+)

Pair of EL34’s for 50W+ (higher B+)

4XEL34’s for about 100W – is is the Doxy pictured above which was a custom build.

Have not done any M800+ amps with 6L6’s but I am sure they would work well.

The core tone IMO should be Push-Pull fixed bias – but with whichever power output you desire. Most EL84 amps are cathode bias – well fixed bias is BETTER, saves the tubes and is more punchy sounding.

The 3 position switch allows you to go from a spanky clean (fantastic with single coils) to Friedman-esque gain levels (I know the Friedman amps well). You can see from the plot response of positions 1, 2, and 3 there is total gain jump of about 18db available. The 3 position switch offers much better control of both the gain AND the frequency reponse. All the positions are extremely useful. ALMOST as much gain as the Crocodile in the 3 setting. If the Croc is 10 on the gain level, then the M800+ is a 9.2.

Effects loop is now standard.

And keep in mind 20-25W is LOUD ENOUGH TO GIG WITH!

35W M800+ SOLD BUT I CAN BUILD ANOTHER

35W from a quad of EL84’s. US$899 plus shipping. Superb clean tones with the gains back and master up. The crunch is awesome in mid gain area, and wonderful modded M tones with gains up. Better than a Friedman Pink Taco. High gain tones ARE in this amp, akin to a SLO100. Gorgeous! Yes it has a loop.

A SPECIAL CANADIAN DEAL!!

40W M800+

This one has a pair of EL34’s for 40W. US$799. Superb clean tones with the gains back and master up. The crunch is awesome in mid gain area, and wonderful modded M tones with gains up. Better than a Friedman Pink Taco. High gain tones ARE in this amp, akin to a SLO100. Gorgeous! Yes it has a loop.

18W M800+

18W from a pair of EL84’s. US$795 plus shipping. Superb clean tones with the gains back and master up. The crunch is awesome in mid gain area, and wonderful modded M tones with gains up. Better than a Friedman Pink Taco. Gorgeous!

SOLD!

But I can build another. 25W from a pair of EL34’s. US$799 plus shipping. Superb clean tones with the gains back and master up. The crunch is awesome in mid gain area, and wonderful modded M tones with gains up. We have a Friedman Small Box Custom here but would choose this M800+. This one has a loop and a post phase inverter master volume in addition to the regular master volume. 8 and 16 ohm speaker connections. EL34’s will last forever as they are run very conservatively.

From the buyer “After receiving my new 24 watt M800, I can without a doubt say this amp is badass! It is super versatile and can achieve a handful of different marshall tones. The build quality is far better than buying from a big name manufacturer and the ability to personalize it with Randy only makes it cooler. I would recommend Phaez amps to anyone who is in the market for a new amp”

20W M800+ 6V6’s

Latest as of Dec 2025. This was an amp I built for stock, although I could be happy with this thing for the rest of my days. Has clean Marshall-y tones in the 1 position, think PLEX and JTM, and 3 is ultra modded Marshall tones. And #2 position is sonically right in the middle. I would take this over any Friedman. Has a loop. A great price on this one. Has JJ 6V6S output tubes. Email me if you are Canadian!