ISP Technologies Michael Sweet Theta Pro DSP Guitar Preamp

See all items from ISP Technologies
Product Description

The Michael Sweet THETA PRO DSP is a Floor controlled guitar system with a fully programmable digital Theta preamp, Vintage preamp plus Studio quality effects processing. The SWEET THETA PRO DSP has been personalized by Michael Sweet which includes his signature on the top of the pedal plus Michael’s tone sculpting. Following Michael’s input the MS THETA PRO DSP now includes a 3 band full parametric equalization, bass and treble post distortion and ships with the 11 personal presets designed by Michael and used in both his recordings and live applications.

The MS THETA PRO DSP also includes a tuner function and the most realistic true stereo Rotary Speaker (Leslie) algorithm. Michael has been using the THETA PRO DSP for over a year to achieve his own sound and now you can own a piece of Rock History with the limited run signature Michael Sweet THETA PRO DSP. The preamp section delivers more tone shaping and gain flexibility than any other processor available.

The MS THETA PRO DSP is based on ISP Technologies' DSP platform using a 32 bit floating point processor and the latest generation of high quality audio converters. Using novel stacked converters the input noise floor feeding the digital domain exceeds over 124db. This amazing input dynamic range combined with over 1500db internal DSP dynamic range, due to the floating point architecture, and ISP’s proprietary oversampled clipping algorithm, make the ThetaPro the only digital domain preamp that can offer massive amounts of usable gain (more than any DSP processor available) without any aliasing or noise.

The MS THETA PRO allows preamp adjustment of tone, gain, saturation and dynamic modulation in the form of ‘SAG’ allows you to emulate the dynamic aspects of vintage tube amplifiers, which provides the actual feel of vintage guitar amps with tube rectifiers.

Fully programmable with a DSP software implementation of the ISP Technologies Theta Preamp, the MS THETA PRO DSP provides super high gain and zero aliasing, which is typical in other digital preamps. The MS THETA PRO DSP has stereo outputs for your stage rig, letting you drive a power amp and typical guitar cabinets, plus balanced XLR outputs with selectable TRUE SPEAKER digital guitar speaker cabinet and a headphone output also with TRUE SPEAKER. ISP’s ground breaking TRUE SPEAKER is a departure from typical speaker simulated outputs, which provide a simple filter response.

ISP’s TRUE SPEAKER provides convolved speaker outputs providing the actual time domain and frequency response aspects of vintage speakers including adjustable microphone placement. With TRUE SPEAKER, the THETA PRO DSP is the ultimate direct recording guitar system with the total realism of several different styles of guitar speaker cabinets and a microphone. TRUE SPEAKER captures the sonic magic of a classic guitar cabinet transduced in air with a microphone in from of the cabinet. Previous attempts to provide a speaker simulated output simply did not duplicate an actual guitar cabinet recorded with a microphone.

Also included is a library of studio quality 32 bit floating point digital effects including wha wha, compressor, multistage stereo phaser, stereo flanger, four voice chorus, 1280 millisecond delay, ping pong stereo delay, stereo rotary speaker (Leslie) and a stunning studio reverb with multiple selectable parameters, plus built in full function tuner. Instant access to your effects allows you to switch your individual effects on or off within any of your programmed and stored presets plus a MIDI dump / load for archiving your data. Rear panel inputs for an external expression pedal map able to countless parameters for on the fly control is also included plus a dedicated input for volume pedal. The ThetaPro DSP is designed and manufactured in the USA and is covered under US Patents 6,944,305 and 7,532,730.

Product Specifications
ISP Technologies Michael Sweet Theta Pro DSP Guitar Preamp Specifications
  • Input Impedance: 470K OHM 
  • Input Level Trim: 21.5db / input level -8dbu to +13.5dbu 
  • Maximum Input Signal: +13.5dbu
  • Noise Floor: - 110dbu A WTD 
  • Dynamic Range: 123db A WTD 
  • MAX Preamp Gain / Digital: 125db 
  • THD / Clean Mode: .002%
  • Decimator / MAX Noise Red: 80db 
  • Compression / Maximum: 22db
  • Frequency Response: 20Hz – 20KHz = +0 / -.5db             
  • Headphone Output Level: MIN -95dbu / MAX 0dbu / +6dbu BOOST ON 
  • Stage Outputs / MAX Level: +12dbu / +15dbu with BOOST ON         
  • Direct XLR Outputs: Max Level +20dbu / Global Trim -12db            
  • Dimensions (WxHxD): 17 x 3.4 x 9 inches      
  • Weight: 7 pounds
  • Direct Output Connection: Balanced XLR 
  • Power: 9VAC RMS / 1.5 AMP

Helpful Info about the Manufacturer
Phone:  248-673-7790 Warranty:  3 Year Pedals; 2 Year Rack Processing
Mark David Submitted: 5/28/2017
Product Rating brightstarbrightstarbrightstarbrightstarbrightstar
This Delivers!
Product Rating
What is your opinion of this product?
I'm very happy with my purchase of the ISP Technologies Michael Sweet Theta Pro DSP Guitar Preamp. I've been searching for a great metal tone for recording and this box delivers in a big way. I'm a fan of the Stryper metal crunch on songs like Soldiers Under Command and To Hell With The Devil and couldn't wait to get my hands on this product. I find it easy to use and the preset sounds are perfect right out of the box. Tweaking and saving presets is simple. The unit is metal, solid, very durable and road worthy! Price tag may seem hefty but for what you's actually a bargain! Features I love in addition to it's tone: the ISP Decimator and tuner built into the unit. It is perfect for direct recording and/or direct to house PA for gigging. The only negatives...power cable adapter is thin (I'd prefer a heavy duty cable,) unplugging and winding cord for gigs could potentially lead to a short in the cable? I do wish ISP offered up gig bag for travel?
0% Interest Payment Plans

12 Payments of
MSRP: $1,609.00
Add to Wish List
Related Items


Pig Hog Lil Pigs Pedal Patch Cable Pack
Pig Hog Lil Pigs Pedal Patch Cable Pack

MSRP: $49.95 Save: $20.00 (40%)

Voodoo Lab Pedal Power 2 Plus Universal Power Supply
Voodoo Lab Pedal Power 2 Plus Universal Power Supply

MSRP: $240.00 Save: $70.01 (29%)

Dunlop 4181 Tortex Standard Guitar Picks .73mm 12 Pack Yellow
Dunlop 4181 Tortex Standard Guitar Picks .73mm 12 Pack Yellow

MSRP: $6.06 Save: $2.11 (35%)

On Stage WGS100 Wooden Guitar Stand
On Stage WGS100 Wooden Guitar Stand

MSRP: $65.99 Save: $21.04 (32%)

TC Electronic Polytune Polyphonic Clip On Guitar Tuner
TC Electronic Polytune Polyphonic Clip On Guitar Tuner

MSRP: $74.99 Save: $25.00 (33%)