API Audio Tranzformer LX

Effect Pedal for Electric Bass

  • Variable compressor with input / output switch
  • 3-Band equalizer +/- 15 dB with input / output switch
  • Discrete API circuit design
  • Input level adjustable (up to +30 dB)
  • Phase inversion switch for balanced and unbalanced output
  • Ground lift switch
  • Clip LED
  • Hard bypass switch
  • Dimensions: approx. 203 x 140 x 102 mm
  • Weight: 1.8 kg
  • Includes external 18 V power supply


  • Hi-Z instrument input: 6.3 mm jack unbalanced
  • Line output: XLR balanced
  • Hi-Z output (Amp): 6.3 mm jack unbalanced

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3 Customer Ratings:
  • 5
  • 4
  • 3
  • 2
  • 1
5 / 5.0
  • handling
  • features
  • sound
  • quality
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2 written ratings
de Automatically translated (Show original)
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Paul101, 22.04.2018
This preamp is excellent!
100% API sound for a relatively small price.
Powerful, present and musical sound.
Very fast, direct and hangs very well on the fingers.
Enormous gain reserves.
The EQ is rather mild and more like an add-on.
But he does a pretty good job.
The compressor is a real surprise!
Although only one button with 6 positions you have a lot of different compression available in conjunction with the gain. The compression is extremely high quality and absolutely live or to use in the studio. I had not expected that.
The compressor even beats most pedals in the 200-300 Euro class in my opinion.

As a pedal I would probably not use it, too big and heavy.
A pity is that the bypass switch is relatively nonsensical.
Once you have the preamp in the signal path, you do not want to turn it off. It sounds so good. A mute would be much better in my opinion.

The device is operated with an included 18V power adapter. This is very small and light. An integrated power supply would be much better.
The DI output delivers line level! (up to +28 dB !!)
It is designed for line inputs.
Here you have to connect an attenuator, if you want to connect the DI Out to a mic input of a desk.
Especially if it does not have a pad switch.
The unbalanced jack out is separately adjustable via the level knob and has plenty of reserves to be able to control PA power amps properly.

This preamp is highly recommended and a real asset to us bass players. To my knowledge, this quality is currently not for us bassists. Especially not for the price. For me, such a small dream has come true.

I am very excited.

Update / long-term experience:

After a few months, the TranZformer LX has become my indispensable sound center. Whether in the studio, live on stage or at home to practice. It is very hard for me to play without the API.
The sound of this device is fast, forward, with present, well-marked mid-highs. The sound always stays fat, dynamic and cultivated. The Lo End is open and still tight.
A preamp that you would not want better for the E Bass (and other signals as well).

Despite its simplicity, the EQ proves to be very good sound and practical.
I really like the compressor. It is rather a compressor of the vehement, the Attack-accelerating kind. Subtle leveling like optical compressors is not its strength. I use it rather in smaller setting with little gain. There he is especially with louder music such as. Rock is very effective and lays the bluff on the already very vehement sound of the API Tranzformer LX.

Of course, this is not a device that conjures up a good signal from a bad signal.
Anyone looking for coloring a la Ampeg or Mesa, is not served here.

Nevertheless, I consider this preamp to be one of the best preamps for the E-Bass ever.
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de Automatically translated (Show original)
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The 1A preamp for electric bass
Bassralf, 07.12.2018
I'm using the API live and in the studio for about four months now and it's easy to get a top sound. Only condition is good quality of the input signal. If the bass delivers scrap, the API can not do anything.

With the very good three-band EQ and the compressor with 6 presets, the API offers good additional features. All the pots, ports and the three footswitches make a good impression, are easy to read and operate. You can only praise the device - it is an acquisition that you will not regret.

My criticisms:
I got the first API with a considerable fall damage. The preamp worked for a short time, but then was broken in the inner workings, after initially I could only detect external damage.
There remain slight doubts with me regarding the fall resistance of the construction.
Therefore, I have mounted on a sufficiently large pedalboard. The size of the API may be a bit embarrassing for the bag of the pedalboard - but it gives me a better feeling during transport.

The Alufront of the API, I think not so successful. Although this looks visually good, but also with my device, I had to sharpen a few edges, because the edges were a bit sharp-edged. I think it would be better if the steel housing encloses the Alufront. So are the aluminum edges, which are not very shock resistant.
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B-Stock from 1,769 AED available
2,079 AED 503.36 €
Plus 205 AED shipping

Since we ship from Germany additional costs through taxes and customs may occur

The price in AED is a guideline price only!

Available immediately
Available immediately

This item is in stock and can be dispatched immediately.

Standard Delivery Times
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