• Account
  • View Shopping Cart

Menu Search View Shopping Cart Call Us

API Select TranZformer® LLX Bass Pedal  From API

Bass EQ, Boost and Overdrive Pedal with the Proprietary API 2510 OpAmp!

API Audio


Retail:  $295.00

"Experience the Difference"

Sound Pure's 3-Year Warranty

Our Free 3-Year Warranty!
In addition to the standard included manufacturer warranty, virtually all new products carry our exclusive, industry-leading, absolutely free, Sound Pure 3-Year Warranty, which includes PARTS & LABOR. This high-value perk is our way of providing the ultimate in added value to enhance the unique personal touch our small, dedicated team contributes to each purchase.
Learn more »

Lifetime Support

Free Lifetime Technical Support!
Our small team of dedicated experts is here to help the original purchaser for the lifetime of the product. Why? Because we care about building real relationships with our customers for life and stand behind every product we sell.
Contact us for up-to-date delivery estimate.
Payments as low as $24/mo.

Manufacturer's Description from API

The API Select TranZformer® LLX incorporates API's legendary EQ circuit into a versatile and compact bass guitar effects pedal. Designed to easily fit into your pedal board and engineered to run on standard 9V or 18V power supplies, the LLX offers +/- 15dB of gain on 3 bass guitar specific frequencies. Additionally, the gain stage can be switched from Clean Boost to Overdrive mode to drive the input OpAmp and add even more tones to your arsenal. Other features include a buffered bypass, -20dB output pad, selectable peak/shelf for upper frequency range, transformer output, and of course the classic API sound.

API Audio

About Manufacturer

API (Automated Processes, Inc.) is world famous for its all-discrete audio products: studio and broadcast mixing consoles, and a full line of rack mount mic preamps, equalizers and processors. It all began with a dream. It was 1968. The company: Automated Processes Inc., formed by men with a vision. Best known for their now legendary "2520 amplifier", this unique amp has been and will continue to be the heart of all API discrete products. It continues to provide reliability and sonic purity unmatched by the competition. The resulting console met the needs of the music, commercial and broadcast industry. API became the leading audio broadcast console manufacturer for radio and television networks and high profile stations. In addition, recording studios, large and small, began using API.....and receiving rave reviews from engineers and producers. There are over 700 API consoles across the nation and around the world, including the three major networks. Over thirty years later, many of these consoles are still in daily use in some of the most prestigious recording and broadcast facilities in the world because, to date, there are few, if any consoles of equal sound quality at a cost-effective price.


Input connection:1/4" Hi-Z unbalanced instrument input

Input Impedance:1MΩ

Bypass:Yes, buffered, 0dB

Output connections:1/4" Hi-Z unbalanced output

Output Impedance:Hi-Z output: Less than 1kΩ

Input Gain Control:0dB - 40dB, Variable

Output Pad:0dB to -20dB, Switched

Maximum output level before clipping:+15dBu (9VDC)

+22dBu (18VDC)

Frequency Response:+0dB, -1dB, 20-20kHz (tone controls at center detent)

Tone Control:100Hz & 400Hz Peaking, 2kHz Shelving/Peaking (w/switch), continuously-variable boost/cut, +/-15dB range.


API 2510 amplifier overdrive (Switched) placed before tone controls. Clean boost amplifies the signal with no added distortion.

Power Supply:9-18VDC @ 100mA

Size:4.6" x 3.8" x 3"

Size (Boxed for Shipping):6" x 4.5" x 4.5"

Actual Weight:1.5 lbs.