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PostPosted: Wed Jun 20, 2018 12:18 pm 
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Mark III

Joined: Thu Jul 13, 2017 7:01 pm
Posts: 205
Heres a bit of the '12at7 in V6 (Phase inverter)/Tungsol V1' tube lineup for ya....

No boosts used. Straight into the front of the amp. Nothing in the loop either.
Stock Flying V w/passive p'ups.

https://www.youtube.com/watch?v=7epyD2QUm0E

80hz top line, 240 just below that, Mid just above bottom line, 2200 level with 240, 6600 just above middle line
Prescence at various between 11-3oclock
Treb 4 o'clock
Mid 11 o'clock
Bass 1 o'clock
Output Level 9 oclock

All three modes used. Volume of amp not really messed with from mode to mode

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Mark V:25
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PostPosted: Wed Jun 20, 2018 3:17 pm 
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Mark III

Joined: Sun Sep 27, 2015 2:50 pm
Posts: 291
Location: Good ole England
Holy crap, that little beast sounds p!ssed off! I like it :twisted:

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Her highness the Veenus
(Mark V/V4 & V7 12AT7 Combo)

2 x 12 Vertical Cab
GSP-1101

Gibson LP Studio with alnico ii pro
Schecter C1-XXX with emg 81/85 18v
Jackson Dinky XL with Duncan designed???
Sigma DNC-1STE


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PostPosted: Wed Jun 20, 2018 3:23 pm 
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Mark III

Joined: Thu Jul 13, 2017 7:01 pm
Posts: 205
Yep its a right little hooligan. Truly sounds like the full amp now.
Savage yet sweet, absolutely as violent as the vid suggests.

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Mark V:25
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PostPosted: Wed Jun 20, 2018 3:25 pm 
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Mark III

Joined: Sun Sep 27, 2015 2:50 pm
Posts: 291
Location: Good ole England
Be carefull while the world cup is on or that little amp will end up with a banning order!

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Her highness the Veenus
(Mark V/V4 & V7 12AT7 Combo)

2 x 12 Vertical Cab
GSP-1101

Gibson LP Studio with alnico ii pro
Schecter C1-XXX with emg 81/85 18v
Jackson Dinky XL with Duncan designed???
Sigma DNC-1STE


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PostPosted: Wed Jun 20, 2018 3:28 pm 
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Mark III

Joined: Thu Jul 13, 2017 7:01 pm
Posts: 205
Hahaha My neighbours are all dead now, I think.

And in footy terms thats some Cantona kick action right there to the ears' crowd member.

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Mark V
Mark V:25
Mark III (Red Stripe)


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PostPosted: Fri Sep 28, 2018 1:08 pm 
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Bottle Rocket

Joined: Sun Jun 18, 2017 10:23 am
Posts: 10
Markageddon wrote:
Heres a bit of the '12at7 in V6 (Phase inverter)/Tungsol V1' tube lineup for ya....

No boosts used. Straight into the front of the amp. Nothing in the loop either.
Stock Flying V w/passive p'ups.

https://www.youtube.com/watch?v=7epyD2QUm0E

80hz top line, 240 just below that, Mid just above bottom line, 2200 level with 240, 6600 just above middle line
Prescence at various between 11-3oclock
Treb 4 o'clock
Mid 11 o'clock
Bass 1 o'clock
Output Level 9 oclock

All three modes used. Volume of amp not really messed with from mode to mode


Hey man, any chance you could elaborate on the difference between putting the AT7 in V2 and the phase inverter (V6) on the v25 (or v35 if you can speak to that)? I have an AT7 inbound... TIA!


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PostPosted: Mon Nov 12, 2018 2:07 am 
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Mark III

Joined: Thu Jul 13, 2017 7:01 pm
Posts: 205
Phase inverter 12at7 affects the amp globally on all modes and seems to make the amp tone more present and bigger yet also more vintage. It manages the signal before it hits the powerstage. But you can tell its done that to the core out of the box tone that still feel 'as was' in the attack and voicing. You definitely can notice the difference at any vol, but especially at volume. Channel gain/eq unaffected. Sounds more 3D sounding than stock.

The V2 on its own recenters the voicing of channels 1 and 2 but at a critical stage in the preamp chain which allows more gain, more dialling EQ and seems to revoice it closer to the old vintage sound (more prominently on Channel 2)...you can dial higher with bass, mids and treble at the pre stage without breakup/flub, for hairier gain settings, also the low gain sounds sound like they break up more pleasingly to my ear, also. (With more sweetness and "brannnnng!!!!")

Both chosen individually are great, but combined, its the warmest most authentic 'makes-it-sound-way-bigger-an-amp-than-it-is' sound ive heard. Luscious, 3d, vintage, diallable to exactly how you want it on the channel stages.
Presence can be dialled higher also without any unwanted frequencies being accentuated, allowing you open up the amp more in a more desirable/pleasing way.

Also key is a decent V1 tube. Like a Goldpin Tungsol 12Ax7 or Mesa SPax7. (The Tungsol feels more full rangey to me but both are excellent choices)
This will give an abundance of signal for the lower gain AT7 to deduct from and still leaving the amp soaring/walking tall.
The gain path like F1 racing hurtling at 200mph on a straight (The SPax7/Tungsol) then hurriedly slowing down for a sharp bend/chicane (AT7 effecting stage) before speeding up again after the bend keeping vital seconds shaved off the clock for the finish (12at7 then powerstage). Rather than driving round the whole track at a solid 90mph constantly. Weird analogy, but that how this feels to me.

Apologies for the late reply, didn't see this post 'til today... Hope this helps still.. The 35 definitely benefitted in the same way as the 25. (Did this in a friend's 35 for him, he was thrilled too)

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Mark V:25
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PostPosted: Wed Nov 14, 2018 10:58 am 
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Bottle Rocket

Joined: Sun Jun 18, 2017 10:23 am
Posts: 10
Markageddon wrote:
Phase inverter 12at7 affects the amp globally on all modes and seems to make the amp tone more present and bigger yet also more vintage. It manages the signal before it hits the powerstage. But you can tell its done that to the core out of the box tone that still feel 'as was' in the attack and voicing. You definitely can notice the difference at any vol, but especially at volume. Channel gain/eq unaffected. Sounds more 3D sounding than stock.

The V2 on its own recenters the voicing of channels 1 and 2 but at a critical stage in the preamp chain which allows more gain, more dialling EQ and seems to revoice it closer to the old vintage sound (more prominently on Channel 2)...you can dial higher with bass, mids and treble at the pre stage without breakup/flub, for hairier gain settings, also the low gain sounds sound like they break up more pleasingly to my ear, also. (With more sweetness and "brannnnng!!!!")

Both chosen individually are great, but combined, its the warmest most authentic 'makes-it-sound-way-bigger-an-amp-than-it-is' sound ive heard. Luscious, 3d, vintage, diallable to exactly how you want it on the channel stages.
Presence can be dialled higher also without any unwanted frequencies being accentuated, allowing you open up the amp more in a more desirable/pleasing way.

Also key is a decent V1 tube. Like a Goldpin Tungsol 12Ax7 or Mesa SPax7. (The Tungsol feels more full rangey to me but both are excellent choices)
This will give an abundance of signal for the lower gain AT7 to deduct from and still leaving the amp soaring/walking tall.
The gain path like F1 racing hurtling at 200mph on a straight (The SPax7/Tungsol) then hurriedly slowing down for a sharp bend/chicane (AT7 effecting stage) before speeding up again after the bend keeping vital seconds shaved off the clock for the finish (12at7 then powerstage). Rather than driving round the whole track at a solid 90mph constantly. Weird analogy, but that how this feels to me.

Apologies for the late reply, didn't see this post 'til today... Hope this helps still.. The 35 definitely benefitted in the same way as the 25. (Did this in a friend's 35 for him, he was thrilled too)


Wow, thanks! No worries on the timeliness, I didn't get around to putting the AT7 in (V2) until Monday.

I didn't realize you had them in both V2 and the PI. Your explanation has me even more curious now, even though I've never been a tube roller. I will say, with the AT7 in V2, I found the low gain sounds in Crunch mode much more pleasant. It was pretty hard to get that edge-of-breakup tone in Crunch mode with the AX7 as it got grainy pretty quickly. With the AT7, it's much smoother where you can almost get the Fat mode tone with a little more gain (but no distortion,) to it. I found I actually had to back my mids off a bit (home playing, master around 9:30) and bring them down to about 9:00.

For channel 2, I had to bump the 80Hz slider up just a touch, but I agree with your assessment, the bass knob can be set higher before the flub. Aside from adjusting the treble and gain slightly, I didn't really tweak anything else playing in MkIV mode.


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