BAsswitch IQ  Bass Direct: LEHLE Bass iq, Sunday Driver, P Split, Little LEhle, Drivers, Switches, Hum Killer, Pre amplifier :: Effects pedals, footswitches :: Basses and Guitars, Warwick


Basswitch IQ DI

The Basswitch IQ DI bass preamp opens up a new dimension in bass pre-amplification and signal routing, offering an “all-in-one” solution for bassists, whether used in stand-alone mode or as the control centre of a pedal board. German manufacturing and best brand components provide maximum reliability and optimal treatment of the electrical signal from your bass instrument, whether from a magnetic or a piezo pickup. Uncompromising in sound, build quality and flexibility, our high-end bass preamp will prepare you for any situation, be it in live performance or recording sessions.

A/B input switcher

The Basswitch IQ DI offers a low impedance input and an input with switchable impedance, both with discrete circuit design. If you connect two instruments to input A and B, the A/B footswitch allows you to toggle between the two. The signal from instrument A is routed to channel A and the signal from instrument B is routed to channel B. If only one instrument is connected to input A, the A/B footswitch routes this signal to channel A or channel B.

High-end bass preamp with parametric EQ

Channel A of the Basswitch IQ DI features a high-end preamp and a four-band EQ, designed for bass instruments, offering bass, double semi-parametric mids and treble controls.

FX Looper

The Basswitch IQ DI offers two effect loops: a passive serial loop and a switchable, infinitely variable mixing loop that enables you to go from a completely dry signal, through parallel on to serial looping. A phase inverter switch ensures that any out of phase signals do not cancel each other out in parallel mode. And a Tuner Out keeps the tuner out of the signal path.

Clean booster

A footswitch and a volume control allow you to add a second high-end amplification stage upstream of the Mix Loop. This allows you to feed tracking or overdrive/distortion pedals with an adequate input signal. If the Mix Loop is not in use, the booster serves as an extremely clean solo booster.

DI box

The Basswitch IQ DI bass preamp can be used to send an output signal directly to a mixing console or a recording unit. The high-quality components and features of the Basswitch IQ DI (high-end preamp, ground-switch, pre/post signal-processing switch, pad for output attenuation) in combination with the Lehle True Sound Technology make this bass preamp an excellent DI box, whether you’re using it at a live gig or in the studio.

Line mixer

The Basswitch IQ DI can also be used as a line mixer. To do this, the return socket of the Mix Loop is used as input and the ratio of this signal to the signals coming from inputs A and B is adjusted by using the mix control.


  1. 1Frequency range: 20Hz – 100KHz (+/- 0.2dB)

  2. 2Distortion: 0.005%

  3. 3Input A impedance: 1 MΩ/10 MΩ (switchable)

  4. 4Input B impedance: 1 MΩ

  5. 5Output impedance: 150Ω

  6. 6Signal-to-noise ratio: -94 db @ 1kHz, 0dBu (A weighted)


  1. 1Max level: 5V RMS (approx. 16 dBu)

  2. 2Max gain: +/- 15 db

  3. 3Bass: +/-18 dB @ 33Hz (peaking)

  4. 4Low Mid: +/-18 dB @ 100Hz – 500Hz (peaking)

  5. 5High Mid: +/-16 dB @ 840Hz – 5.4kHz (peaking)

  6. 6Treble: +/-18 dB @ 12,5 kHz (shelving)

Size & weight

  1. 1Weight: 1375 gr

  2. 2Lenght: 16.2 cm

  3. 3Width: 22.0 cm

  4. 4Overall height: 4.2 cm


  1. 1Voltage range: 9-20V AC/DC

  2. 2Power consumption: 130 mA

Paul Turner "I didn't think I needed the Basswitch but it's such a cool combination of quality EQ and loops, an A/B and a DI.

Design and build quality is unquestionable, but those kinda things are commonplace nowadays, the main issue is this thing sounds great.

The EQ is very very nice. I can add a touch of low end and cut that active sounding top to retain a passive like tone and that's where so many units fail for me!"

For switching, Lehle True Sound Technology uses exclusively gold-plated contact relays and/or gold-plated switches. The decaying signal from a string is so weak that contact materials with lower conductivity have a negative impact on the sound. Ordinary footswitches use contact materials developed to switch high voltages (e.g. electrical power tools) as this is their main field of application. This can be heard, for example, when, after a switch has been in use for some time, a decaying tone starts to break off abruptly. Relays and switches with gold-plated contacts do not have this problem and even the smallest electrical signals can be transmitted for years without being negatively affected. In addition, the relays used in the Basswitch IQ DI have a lifetime about 100 times as long as in ordinary footswitches.

What is Lehle true sound technology?

Footswitches are pressed thousands of times during their long lifetimes - sometimes sensitively but some times more brutally depending on the situation and the musician’s temperament. An ordinary footswitch will switch up to 20 000 times before wearing out mechanically or electrically, which means that either it will stop working altogether or the signal will start to lose transparency and dynamics. The Basswitch IQ DI is equipped with high

quality Lehle footswitches. Here the foot of the musician does not press an ordinary footswitch but an actuator button that activates a pushbutton inside the Basswitch IQ DI via a metal lever. Because the actuator button and the internal pushbutton are not directly connected, the load The Lehle transformer allows for galvanic isolation at the D.I. output. Only real physical galvanic isolation guarantees complete elimination of ground hum and annoying background noises in any live or studio situation. The Lehle transformer also offers a high level of safety as it isolates the Basswitch IQ DI from current peaks of up to 2 000 V.

working principle of the Basswitch iQ Di footswitches Lehle transformer

Any effort exerted by the foot is absorbed by the actuator button and the housing, protecting the circuit board from mechanical stress. The design is as robust as possible and the actuator button mounted in a special socket making for easy and silent operation. Inside the Basswitch IQ DI the impulse from the pushbutton activates special gold plated relays via discrete logic circuitry. This way the switching is done only via high-quality relays, thus guaranteeing absolutely reliable and loss free switching of very sensitive signals. The switching technology and the gold plated relays in the Basswitch IQ DI are designed to operate for up to two million switching cycles!

Note: Transformers are widely thought to have a negative impact on sound. This does not apply in the case of the Lehle transformer used in the Basswitch IQ DI. Both the D.I. Out and the Line Out of the Basswitch IQ DI can handle a frequency range from 20 Hz to 100 KHz (linear). The transformer does not affect the headroom

either as levels of up to 16 dBU are handled without a problem.


Weight: 1375g

Length: 16.2 cm

Width: 22.0 cm

Overall height: 4.2 cm          

Voltage range: 9-20 V AC/DC

Power consumption: max. 130 mA

Frequency range: 20 Hz – 100 KHz (+/- 0,2dB)

Distortion: 0.005 %

Input A impedance: 1 MΩ/10 MΩ (switchable)

Input B impedance: 1 MΩ

Output impedance: 150 Ω

Signal-to-noise ratio: -94 dB @ 1 kHz, 0 dBu (A weighted)

Max. level: 5V RMS (approx. 16 dBu)

Max. gain: +/- 15 dB


Bass: +/- 18 db @ 33Hz (peaking)

Low Mid:  +/- 18 db @ 90 Hz – 500 Hz (peaking)

High Mid: +/- 16 dB @ 840Hz – 5.4kHz (peaking)

Treble: +/- 18 dB @ 12.5kHz (shelving)


Tel: 01926 886433

Nine months interest free credit on up to £5000 on Instrument purchases! For UK residents aged between 16 and 25.