API TranZformer LX Bass Pedal (Compressor EQ)
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  • Regular price $492.15

API TranZformer LX Bass Pedal (Compressor EQ)

The TranZformer LX is a multifunction pedal that is designed to easily and affordably bring the world-famous analog sound of API to your bass. Offering the user an unsurpassed level of sonic control, the TranZformer LX combines an API 525 feedback-type compressor with a bass-optimized 3 band equalizer, both independently in/out switchable. The unit also features phase invert switches on each output, ground lift, clip indicator, transformer output and a hard wire bypass switch. Like all API products, the TranZformer LX is built to API's exacting standards and remains true to the design philosophy that has made API the leader in professional analog gear for nearly 50 years.

  • Traditional fully discrete API circuit design
  • Variable Compressor with in/out switching
  • 3-Band +/- 15dB Equalizer with in/out switching
  • Input Gain control with +30dB of gain
  • Balanced and Unbalanced Output Phase reverse
  • Balanced Output Ground lift
  • Included 18 volt external power supply optimizes performance
  • Hard wire bypass switch
  • Universal +18VDC power supply
  • Clip LED monitors Input and Output stage clipping
  • Features Five Year Parts and Labor Warranty


Input Connection 1/4" Hi-Z unbalanced instrument input
Input Impedance ~500kΩ
Max Hi-Z Input Before Clipping +13dBu
Output Connections 1/4" Hi-Z unbalanced output w/ variable level control 
XLR Male balanced line output, fixed level 
Balanced line output level is +6dB higher than Hi-Z output with Level control fully clockwise.
Output Impedance Hi-Z output 7.5kΩ 
Balanced Line output Less than 75Ω
Gain Control 9.2dB - 30dB, Variable, Hi-Z output 
15.2dB - 36dB, Variable, Balanced line output
Level Control -inf. to 0dB, Variable, Hi-Z output only
Max Output Before Clipping Hi-Z Output +21dBu 
Balanced Line Out +27dBu
Frequency Response +0, -0.5, 20-20kHz, both outputs, low-capacitance cable
Noise -75dBu
THD+N Less than 0.01%
Tone Control 100Hz, 400Hz, 2000Hz Peaking, continuously-variable boost/cut, +/-16dB range.
Compressor Ratio (fixed) Varies from 21 to 201 depending on compressor control setting. 
Attack (fixed) Less than 5ms 
Release (fixed) 100ms average (frequency-dependent for natural envelope tracking) 
Compressor Control (6 Switchable settings) 1 = subtlen, 6 = maximum.
Turning clockwise Increases gain reduction (lower threshold),
while simultaneously raising output level to match.
Power Supply +18VDC @ 650mA
Size 8" x 5.5" x 4"
Size (Boxed for Shipping) 10" x 8" x 8"
Actual Weight 4lbs.
Shipping Weight 6lbs.