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ISP Technologies Theta MSX Michael Sweet Preamp and Multi-effects Pedal Demo

Guitar Preamp and Multi-effects Pedal with 32-bit Floating Point DSP and Speaker-emulated Output

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Michael’s Streamlined Signature Theta Delivers Decades of Stryper Tone — and Much More

The Theta MSX manages to pack a full catalog of Michael Sweet’s sought-after Stryper guitar tones, without modeling and with zero aliasing, into a svelte yet comprehensive floor unit. Crystalline cleans to hair-metal leads kissed with 32-bit stereo effects can be found inside this streamlined signature Theta. You get instant access to presets, functions, and FX via a single row of switches. The MSX’s onboard Vintage guitar preamp carefully mimics the sag and drive characteristics of Michael’s favorite amps; a carefully calibrated speaker-emulated output can deliver those tones straight into a PA for ampless performance. There are even a full-function precision tuner and ISP’s Decimator X noise reduction built right in, making the ISP Technologies Theta MSX your one-stop shop for performing to recording. Whether you’re a Stryper fan or just a guitarist seeking inspiring amplike tone from an all-in-one pedalboard, you can expect great results with the ISP Technologies Theta MSX Michael Sweet signature floor unit from Sweetwater.

Your one-stop shop recording and performing

From rich cleans to the highest gains, the Michael Sweet Theta MSX has you covered. You get a range of great-sounding effects with individual control over each via the smart switching system. Save hundreds of custom presets for instant recall, or choose from Michael’s included Stryper tones for instant inspiration. Onboard FX include wah, rotary speaker, compression, reverb, delay, and more.

Zero-alias Vintage preamp

From gossamer cleans to the gnarliest distortions, the Theta MSX’s Vintage preamp delivers all the gain you need without added noise or aliasing. You also have control of emulated rectifier tube sag for a tighter or spongier response in the hand.

Amp or PA?

Sweetwater guitarists appreciate that you can run the ISP Michael Sweet Theta MSX into an amp stack for the genuine stage experience, or direct out into a PA via the speaker-emulated True Speaker output for portable performance done right.

124dB of dynamic range

From input to output, the ISP Technologies Michael Sweet Theta MSX maintains 124dB of dynamic range. Every nuance of your playing comes through without degradation, from the softest swells to the nastiest pick scrapes and solos.

True Speaker cab emulation

ISP Technologies calls the Michael Sweet Theta MSX speaker-emulated technology True Speaker convolution, because you have practically as much control over your tone as if you were miking a real amplifier cab. It emulates vintage speaker models with amazing results, and you can alter the sound by repositioning the virtual microphone. Whether you’re looking to record silently without a live speaker cabinet or you want to reduce stage noise for gigs, the Theta MSX’s True Speaker makes a welcome addition to this latest Sweet signature.

The latest Decimator X noise reduction

You won’t struggle with buzz and hum with the Theta MSX in your guitar rig. It has ISP Technologies’ latest fast-tracking Decimator X noise-reduction technology built right in, ready to cut out noise without impacting your tone or playing dynamics. Even if your tone relies on ultra-high gain settings, your rig will be quiet and controlled with the Theta MSX.

ISP Technologies Michael Sweet Theta MSX Preamp and Multi-effects Pedal Features:

  • Michael’s streamlined signature Theta
  • Delivers decades of Stryper tone — and much more
  • Vintage guitar preamp delivers rich cleans and high gains without noise or aliasing
  • True Speaker cab emulation outputs great tone even without an amp
  • 32-bit floating point DSP yields depth, detail, and 124dB of dynamic range
  • Onboard FX: wah, envelope follower, compressor, phaser, flanger, chorus, pitch shift, rotary speaker, delay, and reverb
  • Fast-tracking Decimator X noise reduction
  • Rugged and ready for the road
  • Integrated handle pulls
  • Onboard precision tuner
  • 224 presets with 124 songs (3 preset patches per song)

What is Demo Gear?

At Sweetwater, we're so picky that what we call a "demo" is actually better than what most music retailers sell as "new" gear! Our gear hasn't endured hundreds of people a week plunking away at all the keyboards, fumbling through Stairway to Heaven on every guitar or playing with every fader and knob on a mixer or control surface.

What demo means to us is that we've had it out of the box, or maybe it was in a customer's hands for a few days and isn't "factory fresh" as a result. Every demo item we sell has Sweetwater's 2-year Total Confidence Coverage™ warranty, and has been tested and verified up to "new" specs by our factory-authorized technicians to make sure it's in perfect working order before we ship it to you.

When you buy a Demo item at Sweetwater, you get:
  • 2-year Total Confidence Coverage Warranty™!
  • Products inspected and tested by our factory-authorized techs, guaranteed to function like new (or better)!
  • FREE shipping on most items
  • Equipment that will MEET or EXCEED your expectations!

Click HERE to browse our current inventory of Demo equipment. Purchasing demo gear from Sweetwater is a smart and safe way to save!

Warranty Info

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Free 2-year Warranty

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Tech Specs

  • Pedal Type: Guitar Preamp with Multi-FX
  • Analog/Digital: Digital
  • Presets: 224 User Programmable Presets, Song Mode with 124 Songs
  • Effects Types: Wah, Envelope Follower, Compressor, Phaser, Flanger, Chorus, Pitch Shift, Rotary, Delay, Reverb
  • Inputs: 1 x 1/4" (instrument), 1 x 1/8" (ext audio)
  • Outputs: 2 x XLR (direct out), 2 x 1/4" (stage out)
  • MIDI I/O: In/Out
  • Headphones: 1 x 1/8"
  • Other I/O: 3 x 1/4" (expression, volume, expression switch)
  • Power Source: 9V power supply (included)
  • Height: 4"
  • Width: 17"
  • Depth: 7"
  • Weight: 6.5 lbs.
  • Manufacturer Part Number: Theta MSX

What Makes Our Sales Engineers Great?

Sweetwater Sales Engineers are a world-class team of experts dedicated to you. Hand selected from across the globe, each brings a wealth of experience and expertise in the world of music gear to provide you with unparalleled service completely free of charge. Friendly relationships, real trust, and the right gear are only a call or a click away!

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Customer Reviews

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Rated 5/5

The Most Analog Sounding Digital Processor of All Time!

First off, my sales guy Aaron Cieslikowski and his team are the best. Prompt, courteous and always at the ready to help answer any questions for any situation I may have. Thank you Aaron for all of your help over the years!

As for the ISP Theta MSX, I can barely form a sentence as to how incredibly awesome this processor SOUNDS. It is legitimately thee most analog sounding piece of digital gear I have ever owned. And I have owned them all. Vintage tones, modern tones, 80's chorused clean and dirty tones, metal tones, it's literally all there. Don't care that it doesn't have USB. You don't need it. Don't care that it doesn't have an infinite amount of tweak-able parameters. You don't need them either.

It's simple and easy to use, sounds and feels great under your fingers. I absolutely love this processor.
Music background: Guitarist for TimeWhys
Rated 5/5

This is the one!

Like others who have written reviews on this amazing unit, I too have owned it all (Fractal, Atomic, Headrush, Line 6, Hotone, Neural DSP, etc). and this unit blows them all away!

I am simply astounded how much it feels, responds, and reacts like the real deal. The cabinet emulation is also first class. Don't be fooled by other products that only offer option paralysis (100's of cab models) - Go with what works! Keep it simple, and let the inspiration flow.

This Theta MSX is pure inspiration in a box for me - I love it, and love ISP Technologies.

Get this instead of the others...they all do amp modeling...ISP Does TONE MODELING - There's a huge difference there.
Music background: Over 15 years playing guitar, touring, sessions, etc.
Rated 5/5

Simply the Best!

Like Michael below (awesome review, BTW), I too have owned or used Fractal, Line 6, Kemper, Atomic and Hotone modeling products... The ISP Theta MSX is the best guitar system I've used to date.

The tonal flexibility, capability, feel, and experience are all superior to what I've experienced with the rest.

Don't sleep on this product, folks! It's unbeatable, and plugging this in to a system with the Cabinet simulation is so incredible.

ISP may not have the best marketing, but their products beat the rest.
Music background: Over 12 years touring, multiple styles of music (primarily heavy)
Rated 5/5

Massive!

I"ve had, or heard, Helix, Kemper, Fractal, the very best of the modern amp sims. This ISP Theta MSX just sounds killer. Yes, Stryker / Michael Sweet have their sound, which I love, but this box is capable of so much more.

Don't let YouTube sound deter you from checking one out. Through cabs, headphones, ear buds or monitors, this box is as punchy as you could want or a clean as clean can be with or without effects.

With the Decimator integrated, it was a no brainer for recording. Try one out if you can. Hearing it, and playing it yourself, will make a huge difference.

Great job Buck and Michael!
Music background: Songwriter, Studio Musician
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