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Quad Tube pics

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Kim:
FRONT VIEW
2x12 closed-back combo that uses a pair of Celestion G12T-75 speakers at 8 ohms each.


REAR VIEW
Here you can see the Rack Holster.  A rackmount fx processor of your choice can be vertically mounted here if desired.  The Rack Holster itself is detachable; it's held on with 4 special Velcro inserts.  It takes a good whack to install this rack into the Velcro, so it's not flimsy like you'd think Velcro normally is.  Still, it's not recommended to transport the amp with something mounted in the Rack Holster.


FRONT PANEL
Looks similar to the MP-2 Input, except the Quad Tube also has a High/Low switch that sets the Input sensitivity.  The manual says that if the Input Clip LED is lighting up when you play hard, you should set the switch to "Low".


The button layout is similar to the MP-2, except the buttons are actual buttons with a tactile switch behind them instead of the membrane-style panel the MP-2 has.  Also, there's a VariCab function on this menu (instead of Wah).  This gives the amp programmable cab emulations; Bypass, 2x12 Vintage, 2x12 Bright, 4x12 Vintage, 4x12 Bright, while also using switchable Lo Boost, and Hi Cut.  These all can be programmed on Left and Right independent of each other.  A Standby switch allows the amp to be used quietly without the speakers on for recording, etc.  The Quad Tube has six Chorus modes to choose from: Rock I, Jazz I, Rock II, Jazz II, Rock III, and Jazz III.  According to the manual: "The Jazz modes have a large stereo field, and in general, sound best with Clean sounds. In contrast, the Rock modes are more tightly focused and work better for distorted sounds.  In Rock II and Jazz II modes the chorus rate is slightly modulated by the guitar input (i.e., the harder you play, the faster the chorus LFO). This makes for a chorus effect that is very dynamic and alive. Rock III and Jazz III are the same as II, but with twice the modulation amount."



REAR VIEW
Midi In, Out, and Thru jacks.  This amp has Phantom Power supplied internally, unlike the MP-1/2 which needs an external power supply hooked up to send Phantom Power through the 7-pin midi cable to switcher.  There's also a quiet cooling fan to keep temps down.


Ahh, versatility.  Programmable Stereo Effects Loops and a non-programmable Mono Effects Loop.  Studio Outputs for recording, FOH sound, etc.  All the Outputs are independently buffered and may all be used simultaneously if desired.  The funny looking aluminum tabs are for winding up and storing the mains power cord.  I only wish there were External Speaker jacks to connect other cabs, too...

MarshallJMP:
Well that was a nice review  :thumb-up:

rnolan:
Hey Kim, Wow, nice combo. I've been thinking of doing something similar with one of my MP2s. Love the rackholster.  How are the 4 tubes organised ? Sounds like gain city  >:D

Harley Hexxe:
Hey Kim,

    If I understand this correctly, the Quad doesn't have the Wah function like the MP-2, and the Chorus is preset and limited to six selections. The Vari-cab functions are in the menu, is it the same choices you get with a Microcab?

    The rack holster is an interesting idea since one multi effects processor would cover almost  anything else that isn't in the amp already, but it's too bad most of the multi effects out there have such limited delays.

    A cool combo none the less :thumb-up:

Kim:

--- Quote from: rnolan on October 16, 2016, 12:19:26 AM ---Hey Kim, Wow, nice combo. I've been thinking of doing something similar with one of my MP2s. Love the rackholster.  How are the 4 tubes organised ? Sounds like gain city  >:D

--- End quote ---

Well, those four tubes aren't all in the preamp section, if that's what you might be thinking.  It seems to be laid out like an MP-2 (with two tubes) and a Microtube with one tube for each 75 watt/8 ohm channel.  I haven't physically opened it up to look at the inside of this amp yet (I know...wtf, right?)  ;) other than pulling the speakers out to verify what brand/model they are.



--- Quote from: Harley Hexxe on October 16, 2016, 06:59:17 AM ---Hey Kim,
      If I understand this correctly, the Quad doesn't have the Wah function like the MP-2, and the Chorus is preset and limited to six selections. The Vari-cab functions are in the menu, is it the same choices you get with a Microcab?
--- End quote ---

The Chorus Depth and Rate parameters are still as adjustable as the MP-2.  The different modes of Chorus allow for different textures by completely separating the Left and Right waves in the Jazz modes (making the widest stereo field) and mixing a bit of the Left and Right waves together in the Rock modes to make the stereo field a bit narrower.

Here's a menu shot of the Varicab.  You can see that the Left and Right side can be adjusted independently of each other.  Varicab selections are Bypass, 2x12 Vintage, 2x12 Bright, 4x12 Vintage, and 4x12 Bright.  No Open-back or Closed-back options.


Then the sub menu continues to a Lo Boost In/Out option. This would be the equivalent to the Microcab's "Thump" control, and is also selected Left and Right independent of each other:


And then the Hi Cut In/Out option too:

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