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VHT SIG:X Series 100W Tube Guitar Amp Head

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Product 430308
Product Price $0.00
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The SIG:X tube amp head produces an astonishing array of tones and textures never before attainable from any single amplifier. Incorporating propriet...Click To Read More About This Product

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Feature packed, yet simple and intuitive to operate.

The SIG:X tube amp head produces an astonishing array of tones and textures never before attainable from any single amplifier. Incorporating proprietary VHT design technology, top-notch components, precision engineered transformers and legendary VHT build quality, the SIG:X is absolutely without peer in the guitar amplifier industry.

The SIG:X produces an incredible palette of clean sounds on all 3 channels, then gradually morphs from bluesy grit to fat chunky rhythms sounds and finally into a fire-breathing gain machine ” all on only one of its three channels.


The SIG:X lead channel can do everything from pristine clean to fully saturated, highly detailed super-gain at pretty much any desired volume setting. With its unique touch sensitivity, just touching the strings lightly and then smacking an open E chord will cause the tone to hold together and then open up on the decay. This effect is present regardless of gain or volume setting and will help bring out overtones and harmonics you have probably never experienced on a channel switching amplifier before.


This is probably the most versatile channel on the amplifier and produces what many consider to be the signature VHT sound. Don't be too surprised to find that this is much more than your average medium gain channel. It is also capable of producing some pretty devastating solo settings. The RHYTHM channel differs from the LEAD channel only in VOICING switch nomenclature and internal tone shaping.


In the SIG:X amp head, the user-friendly and expressive qualities of this channel should help illustrate why many players swear by the VHT clean sound. The most important thing to remember about this channel is to USE YOUR GUITAR VOLUME. This is an extremely dynamic channel. By setting the volume a little louder than needed and controlling the volume from your guitar you will be rewarded with a huge array of tonal textures and in-between tones that most players struggle to get with multiple amps and boost pedals. CLEAN differs from the LEAD channel in amount of available gain, VOICING switch nomenclature and internal tone shaping.


Like all amplifiers, the VHT SIG:X has tone and gain controls, but unlike any other amplifier the SIG:X gives you total control over VOICING and GAIN. This GAIN I / GAIN II / MASTER VOLUME configuration is the key to dialing in the SIG:X sound and volume to your specific requirements.

It includes a Smart Foot-controller for selecting LEAD, RHYTHM, CLEAN, BOOST and EFFECTS. Controller recalls previously selected combination of channel and boost/loop.

If the SIG:X is all about transition. Most multi-channel amps give you a one trick pony on each channel at best, and multiple channels of one average sound at worst. Guitar music is a string of spontaneous and often unorthodox impulses. Guitar players attack, coax and finesse music out of a guitar in ways that seem to defy logic and the laws of physics. It's all of the things we do "in-between" that gives guitar music excitement and emotional impact. These in-between or transitional stages that usually happen in spite of your existing amp settings are where players live and where the SIG:X shines most brightly.

To fully realize the range and flexibility of this amplifier, one need only remember to keep the guitar volume and tone controls in mind. Playing off of the guitar controls is practically a lost art. This is probably because amps of the recent past have been lacking in the things that amps of an earlier era excelled at - a great basic tone and an unmistakable feel. Many players will sacrifice flexibility and modern conveniences for great tone and feel. The SIG:X was designed to give you both and it truly delivers!

  • 3 independent channels with separate tone controls.
  • 3-Position PRE EQ VOICING switch for each channel allowing custom tailored tone shaping.
  • Exclusive VHT GAIN I/GAIN II Voicing and Overdrive configurations with channel assignable Footswitchable or manual (front panel) gain boost.
  • MORE/LESS MODE (Gain Stacking) for each High-Gain channel to select 3 or 4 Tube Gain stages on selected channel (channel assignable as on CL/UL models).
  • POWER SHIFT feature, a single mini toggle switch on each channel enables channel assignable Tube/SS Rectifier and 100W/40W output power selection (operates like ENHANCE MODE on Fifty/CL/ST).
  • Patented DYNAMIC SENSING feature (introduced in the GP3 pre) tracks string attack/decay to optimize sustain and note detail.
  • Two dedicated sets of Depth and Presence controls, one set for the Clean channel and one set for the LEAD and RHYTHM channels. Each set of Depth and Presence controls are voiced for their specific channels.
  • Footswitchable True-Bypass, Series/Parallel Effects Loop with level controls. Suitable for using the loop as a volume boost.
  • Footswitch Boost and Effects functions can then used for gain boost (BOOST) or volume boost (EFFECTS) or both. Very cool with the recall feature.
  • One 16 ohm output jack is provided for connection to a 16 ohm cabinet. Two additional parallel jacks with a two position 8/4 ohm selector switch are provided.
  • A fixed level line out jack is also provided for direct recording or slaving.
  • Output power: 100 Watts RMS max. 40 Watts RMS, low power mode.
  • Size: 29-1/4W X 9H X 10-1/2D
  • Weight: 53 pounds
  • Tube compliment:
  • 1 X 12AX7 Tung Sol
  • 5 X 12AX7A - Shuguang
  • 2 X KT88 ” Sovtek ” Premium Matched
  • 1 X 5U4G ” EH
Questions & Answers View All

Review Snapshot

by PowerReviews

(based on 7 reviews)

Ratings Distribution

  • 5 Stars



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  • 2 Stars



  • 1 Stars



Reviewed by 7 customers

Displaying reviews 1-7

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By aaronuws

from West Lafayette, Indiana

This is a great sounding amp. Easy to any type of sound from soft jazzy tones, to searing distortion that could easily rival the guitar gods, and then you still have the boost which takes it over the top Hard and HEAVY! Thick, rich (and lots of low end for 7 string guitar) tube sound! Many options like having its like having 12 seperate amps! 3 channels, and each have 3 different switch settings which change the sound and dynamics, and then there is the Boost!!! Each channel also has its own 3 band EQ for further definition and other switches for mid cut, etc. An awesome amp that sounds fuller, and richer than the Marshal JVM410. Loud enough to break the neighbors windows, but with the selectiable 40/100 wattage you can turn it down to only break your own windows (A+ VHT)! FX loop is very flexiablewith adjusting the mix (Or adding a boost). Great Amp, only things I wish it had, would be a Master Volume switch for all channels, and the footswitches were spaced just a bit more (or my feet could be too big). You would NOT regret this purchase!

(0 of 1 customers found this review helpful)


Great Amp!

By schecterc1h

from Murrieta, CA

See all my reviews

I recently played this amp at a music store. They had a sound-proof room that this amp was in, so they let me crank it up to really get the tubes cooking. The clean channel is soooo pristine! My favorite setting is the 'Bloom' on this channel. Very balanced sound. I switch all the channels down to 40 watts to really push the tubes - sounds great. Now for the rhythm channel - super smooth distortion on this channel ranging from light break-up to heavy overdrive. Lead channel is incredible. It can provide heavy saturation while still retaining clarity and that "huge" sound that kicks you in the gut. Great for soloing!!! The price is very good for an amp of this quality. I also tried out the VHT Pitbull Ultra-Lead (which is much more $$$) and the Sig:X has a much better feel. Not that over-rated mushy Dual Rectifier sound, this is a real boutique amp.

(0 of 1 customers found this review helpful)


I missed guess I it!

By 330 and a Half

from Kansas City

See all my reviews

This is a high quality, feature-laden amp although I didn't like it as well as my Mesa Boogie Mark IV when A/B'd with the same cabinets. I read quite a bit about it but still didn't really understand it's full functionality until I tried it. But I missed the meat of all the hype. As some would say, it's probably just too subtle for me. But then, I've never found an amp I liked better than my Mark IV.

(0 of 1 customers found this review helpful)


It's Ok.....that's it

By TZ5150-05I88

from New Jersey

See all my reviews

This amp is built Very Well. All the channels sound Ok nothing special. The highs on this amp are a bit too much for me. All in all it's just Ok.


SIG:X.......AWESOME AMP!!!!!

By VHT is the ONE

from Lexington, KY

I have played guitar for over 25 years and this is the BEST AMPLIFIER I have had the pleasure to play and I have owned and played on a lot of the top brands out there Marshall etc. This amp has the most pleasing tone of any I have heard, all 3 channels sound great and cover a huge array of sounds. It took me a little while to find the sounds I was looking for but once I found it, well lets just say I haven't stopped smiling since. BUY ONE take your time find your sound and you will be real happy!



By Rip and Shred Guitar

from Used to be Mass, Now texas

See all my reviews

It's all here. This is an awesome amp all the way around. I play metal and it does what I ask it to do in spades! 3 channels of the best tube tone anywhere. Take your time with this amp and find your sound. You will be happy. And LOUD AS HELL!



By Rip and Shred Guitar

from Used to be Mass, Now texas

See all my reviews

This amp is awesome. Period. You have to take your time and get to know it. Loads of features, quality build. VERY LOUD! Even on 40 watts you can hurt others or yourself.

Displaying reviews 1-7

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