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ISP Technologies Theta Preamp Distortion Pedal with Decimator Noise Reduction , $391.00 - Add to Cart Skip to Product Information

ISP Technologies Theta Preamp Distortion Pedal with Decimator Noise Reduction

Electric Guitar Preamplifier Pedal, with 2 x Gain Stages, 2 x 3-band EQ, Over 160dB of Gain, and Decimator Noise Reduction
ISP Technologies Theta Preamp Distortion Pedal with Decimator Noise Reduction
ISP Technologies Theta Preamp Distortion Pedal with Decimator Noise Reduction

We Can Get It!

While this isn't an item we normally stock, we can still get it due to our great relationship with ISP Technologies. Go ahead and place your order and we'll follow up shortly to let you know when to expect it. Estimated November 2026

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ISP Technologies Theta Preamp Distortion Pedal with Decimator Noise Reduction
We Can Get It!

While this isn't an item we normally stock, we can still get it due to our great relationship with ISP Technologies. Go ahead and place your order and we'll follow up shortly to let you know when to expect it. Estimated November 2026

Much More Than a High-gain Powerhouse

This article was Written By

Our Product Research Team

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ISP Technologies created the Theta Preamp Pedal to bring you the aggressive gain and sustain from their acclaimed Theta amplifier, in a pedalboard-friendly design. We're talking outrageous gain - over 160dB of gain, when you use both the Pre-distort Preamplifier and High Gain Distortion sections together. Or just the Pre-distort Preamplifier stage's 3-band EQ for sweet tone shaping independent of the high-gain stage, for extra versatility. And with its +/-15-volt power supply, you've got an amazing amount of headroom for more dynamic tones with the ISP Technologies Theta Preamp Pedal.

ISP Technologies Theta Preamp Pedal at a Glance:
  • Over 160dB of gain for undeniably aggressive tone and sustain
  • Decimator G-string II circuit means ultra-quiet operation
  • More headroom means more punch, impact, and tonal tenacity
Over 160dB of gain for undeniably aggressive tone and sustain

It may seem like a bit much, but between the two gain stages on the Theta Preamp Pedal you've got over 160dB of gain on tap. You can use the Pre-distort Preamp stage either for clean tone-shaping (with the 3-band EQ) or as a rich-sounding overdrive. The High Gain Distortion stage gives you 3-band tonal control too, so it's easy to really dial-in your ideal tones on the Theta Preamp Pedal.

Decimator G-string II circuit means ultra-quiet operation

The award-winning Decimator G-string II noise-reduction circuit on the Theta Preamp Pedal is what keeps this high-gain monster from sounding like a continuous static discharge. In fact, the Decimator technology provides more than 80dB of noise reduction. And the big deal with this generation of the Decimator technology is the incredibly smooth release response, which means that you don't hear the noise reduction working at all - you just notice how quiet your rig is when you're not playing.

More headroom means more punch, impact, and tonal tenacity

The Theta Preamp Pedal packs an internal +/-15-volt power supply, which gives it three times the headroom of a typical 9-volt pedal. More headroom means more dynamics, and that means more punch, impact, and nuance in your tone. So even if you have the gain on the Theta Preamp Pedal cranked, you'll still have a powerful, aggressive tone with a ton of character.

ISP Technologies Theta Preamp Pedal Features:
  • High-gain preamplifier pedal for electric guitar with two gain stages
  • Pre-distort Preamp stage can be used for clean tone shaping, or as an overdrive
  • High Gain Distortion stage provides incredible distortion and sustain
  • Use both stages together for up to 160dB+ of gain
  • Independent 3-band EQs with sweepable mids for each gain stage
  • Decimator G-string II circuit gives you over 80dB of noise reduction for quiet high-gain operation
  • +/-15-volt power supply gives you incredible headroom for more dynamic, punchy tones
The Theta Preamp Pedal packs more gain than you'll find in any other preamp pedal!

Warranty Info

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Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.