Basswitch LEHLE Sonic Spark, Sunday Driver, P Split, Little LEhle, Boost Bass Direct, Pre amplifier :: Effects pedals, footswitches :: Basses and Guitars, Warwick, Birmingham, Manchester, London


The Basswitch Sonic Spark integrates a harmonic overtone generator into a complex EQ section that will make your bass sound shine over stages, studios and rehearsal rooms. This sonic flavour enhancer is equipped with Lehle True Sound Technology, which means it switches via gold plated relays, has a discrete JFET input stage and works internally with 18 V. The Basswitch Sonic Spark has a gain control of +/-15 dB.

This will also enable our three Basswitch babies to work as a compact standalone preamp in front of an active monitor or bass cab, while the housing is designed to perfectly match the Basswitch IQ DI.

gold-plated switches

adjustable gain

voltage internally doubled to 18V

Q: What is the effect of an impedance converter?

A: The sound will be freshened up and signal loss through long cable runs will be compensated.

Q: How can I compensate the signal loss on my effects board?

A: By using an impedance converter, which provides a high impedance input socket for the instrument signal and a low impedance output signal that is more resistent against loss.

Q: What is Lehle True Sound Technology?

A: Lehle True Sound Technology is based on individual measures that follow one common goal: transporting the sound and character of the instrument in the best way possible, without any negative alteration. It achieves an open and dynamic sound without losing any detail. The buffers are designed to easily transmit within the megaherz-range. The Lehle True Sound technology uses either gold plated relays or gold plated switches, even the smallest currents will be transported without any degradation for many years to come.

Technical Data:

Weight: 390 g

Length: 14.9 cm

Width: 6.0 cm

Height: 4.4 cm

Current consumption: 9-15 V AC/DC

9 V DC max. 60 mA DC

15 V DC max. 65 mA DC

Frequency response: 20 Hz – 75kHz, +0,5/-3 dB, re -10 dBu

THD+N: < 0,2 %, re -10 dBu input signal,

22 Hz - 22 kHz, max Gain,

intensity and deep-bright pots in 12h position,

enhance pot in 7h position

Input impedance: 3.2 MOhm @ 1 kHz

Output impedance: 58 Ohm @ 1 kHz

Residual noise: < 78 dBu‚ 22 Hz - 22 kHz, unweighted,

all pots in 12h position

Max. output level: + 16 dBu < 1 % THD, 1 kHz, gain +14 dB,

15 V DC

Max. gain: +14/-15 dB < 0.1 % THD, 1 kHz

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.


Tel: 01926 886433

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