¡Obtenga asesoría en español!  Llámenos hoy a (800) 222-4701
(800) 222-4700 Talk to an expert!
Loading Cart
Your Cart Is Empty

See what's new at Sweetwater.

My Cart this.cartQty

API TranZformer CMP Compressor Pedal , $295.00 - Add to Cart Skip to Product Information

API TranZformer CMP Compressor Pedal

VCA-style Compressor Guitar Effects Pedal
API TranZformer CMP Compressor Pedal
API TranZformer CMP Compressor Pedal

Sweetwater Gear Exchange
Find it used on Sweetwater's Gear Exchange
listed for $239.00
Backordered - More On The Way!

We expect more from API in just a few weeks. Order today to reserve yours now, risk-free. Estimated September 2026

Ask An Expert Our Expertly trained Sales Engineers are ready to help! What is a Sales Engineer?
API TranZformer CMP Compressor Pedal
Backordered - More On The Way!

We expect more from API in just a few weeks. Order today to reserve yours now, risk-free. Estimated September 2026

Classic API Compression for Your Pedalboard

This article was Written By

Our Product Research Team

Get to know them!

The API TranZformer CMP will equip your pedalboard with the same studio-quality dynamics processing that launched a thousand hit records. This guitar effects pedal abounds with signature API sound, courtesy of a 527 VCA-style compressor circuit, a 2510 op-amp, and a muscular-sounding transformer output. What's more, this stompbox was engineered for high-performance operation with a standard 9-volt power supply. The TranZformer CMP offers both feed-forward and feedback compression for added sonic versatility, along with adjustable attack and release times and an ultra-useful dry/wet knob. The TranZformer CMP boasts high-quality buffered bypass switching to ensure an optimal signal, even if your rig includes arena-sized cable runs. An easy-to-see indicator LED rounds out the TranZformer CMP's outstanding features.

Studio-level dynamics processing

The TranZformer CMP puts studio-precise dynamics processing right at your feet. This compressor pedal's Input knob yields +9dB to +30dB of gain; more gain equals more compression. The Sustain knob determines the amount of gain reduction; higher levels lower the threshold for more compression. The Output knob delivers -inf. to 0dB of level control; fully clockwise exhibits 0dB (zero level cut). You also get Fast/Slow Attack and Release switches that offer 1ms/10ms for attack and 300ms/1s for release. The guitarists here at Sweetwater have found the Blend control to be one of the TranZformer CMP's most useful features, enabling you to dial in hyper-transparent compression in any application.

Classic meets modern

There are two types of compression onboard the API TranZformer CMP: "old" and "new." The old style uses the feedback type of compression found on the classic early-'70s 525; the new style uses a feed-forward type similar to many popular modern compressors.

API TranZformer CMP Compressor Pedal Features:

  • Packs a 527 VCA-style compressor circuit into a guitar effects pedal
  • Audio circuit uses a 2510 op-amp with a muscular-sounding transformer output
  • Engineered for high-performance operation with a standard 9-volt power supply
  • Selectable Type switch for modern feed-forward or vintage feedback operation
  • Adjustable attack and release times and an ultra-useful dry/wet Blend knob
  • High-quality buffered bypass switching ensures an optimal signal with long cable runs
  • Easy-to-see indicator LED

Warranty Info

Sweetwater's FREE 2-Year Total Confidence Coverage Warranty

Extra peace of mind at no extra cost.

  • Save money with FREE parts and labor
  • Get back to making music with the industry's fastest turnaround time
  • Fix it the first time with our award-winning, factory-certified Service Department
Learn More about Total Confidence Coverage

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.