Lehle RMI Basswitch IQ DI

Lehle RMI Basswitch IQ DI

$ 412.61excl. VAT
RMI BASSWITCH IQ DI
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The concept for this “swiss army knife for bassplayers” comes from Jacques Ruppert, head of RMI, while the technical part was realized here at Lehle. As a central controller for bass setups it is equipped with a number or features:
  • Lehle True Sound Technology
  • Input A/B switch with impedance matching for piezo pickups
  • Studiograde preamp
  • 4-band EQ with double semiparametric mids
  • switchable effectsloop with blend/mix control
  • switchable effectsloop can also be used as volume boost
  • serial effectsloop (non switchable)
  • Studiograde D.I.-box with Pad-, Pre/Post- und groundlift-switch incl Lehle LTMZ transformer for galvanic isolation
  • can be used with any power supply 9 to 20 volt AC oder DC
  • additonal output for tuner
  • muteswitch
  • extremly robust design with protected controls

The Basswitch IQ DI is manufactured by Lehle in Germany on behalf of RMI.
www.rmi.lu

Q: Can I use a piezo pick-up with the Basswitch IQ DI bass preamp?
A: Yes you can, thanks to its variable input impedance. The Basswitch IQ DI has an input impedance switch on Channel A making it equally suitable for a magnetic and piezo pick-ups.

Q: What kind of power supply should I use for with my Basswitch IQ DI bass preamp?
A: The Basswitch IQ DI accepts all power supplies providing not less than 9V, not more than 20V and at least 130 mA. Either alternating (AC) or direct current (DC) sources can be used and the polarity is not relevant.

Q: What does the Mix Control of the Basswitch IQ DI bass preamp do?
A: Many effect pedals do not let you mix the basic sound of your instrument and the effect sound. At the same time many effect pedals destroy the powerful bass component in the signal and the result is an unattractive, thin sound. The Mix Control allows you to adjust the effects-ratio added to the original sound, settings from 0% (dry) to 100% (wet) are possible.

Q: Can the Basswitch IQ DI drive a power amp?
A: Yes the Basswitch IQ DI can drive a power amp directly. The preamp can boost the signal up to +15 dB.

Q: Can the Basswitch IQ DI be used to switch between 2 totally different instruments?
A: Yes Channel A of the Basswitch IQ DI features a cut and boost level control for volume adjustment between the two inputs.

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 goldplated relais or goldplated switches, even the smallest currents will be transported without any degradation for many years to come.

Specs

Knobs

Input INST A
This is the standard input for all instruments. The input is designed to accept active and passive instruments. You can also connect instruments with piezo or other high‑impedance pickups; to do this, you can raise the impedance from 1 MOhm to 10 MOhm with the adjacent ΩA switch. When using this input you can use the A/B switching function irrespective of whether an instrument is connected to input INST B. If an instrument is only connected to input A the A/B footswitch toggles Input A between Channel A and Channel B. Note: Please note the distinction between input selection – A or B and internal routing – via Channel A (preamp/EQ) or Channel B (straight through)
ΩA Switch
This switch enables you to change the impedance of Input A from the standard 1 MOhm to 10 MOhm permitting the direct connection of instruments with piezo pickups or similar. The impedance should be raised to 10MΩ only if the instrument is not equipped with an internal preamp for the piezo pick-up or if the internal preamp can be defeated. If the internal preamp can be defeated we recommend that you use the high‑end preamp and parametric EQ of the Basswitch IQ DI instead. In most cases using the preamp/EQ section of the Basswitch IQ DI will give better results. Note: The ΩA switch is “off” (1 MOhm) in the „up” position and “on” (10 MOhm) in the „down” position.
Input INST B
This is the optional input for a second instrument. Should you wish to use two instruments using the same cable you must use Input A and Input B is not used. Note: If you use only one cable for two instruments we recommend that you use the mute function (23) together with the A/B function when switching instruments.
LINE OUT
Connect your bass amp or power amplifier or active monitor here. If the Basswitch IQ DI is used upstream of a bass amp, it should be in “straight through” mode (Channel B active – LED white – Loop/Boost function off – no LED effects in serial loop off, except for those that stay on all the time) and the settings for the basic sound should then be made on the amplifier. Channel A can be used either to match the sound and volume of your second instrument as needed with the aid of the pre‑ amp and the highly effective EQ or, if only one instrument is being used, to create a second sound, available at the push of a footswitch. If the Basswitch IQ DI is used as a preamp upstream of a power amp or an active monitor Channel A must be used (blue LED) and the basic sound set up using the preamp/EQ section of the Basswitch IQ DI. Note: Make sure that in this case too the Loop/Boost functions are off (LED off) and that the effects in the serial loop are off, except for those that stay on all the time)when setting up your sound.
TUNER OUT
Connecting your tuner here guarantees that the tuner is completely out of the signal path and does not cause sound losses. It allows you to keep your tuner on all the time so that you can check of your tuning and intonation control on the fly. To defeat the sound while tuning use the mute button on the Basswitch IQ DI. The mute button defeats both the Line Out and the D.I. Out.
SEND Output (Serial Loop)
Connect the first effect(s) you want to run in the serial loop here. The main purpose of the passive serial loop is to connect to the Basswitch IQ DI devices that will be on all the time. Typical examples are volume pedals, tone exciters or compressors. You can also use this loop to create an additional FX Loop to complement the switchable Mix Loop. This is however only advisable if the effects used are equipped with a high‑quality bypass and are very low‑noise. In case of doubt, we recommend that for this type of use you insert a looper pedal (e.g. Lehle D.Loop SGoS or Lehle Parallel L) between the serial loop and the effects that are not intended to stay on all the time.
RETURN Input (Serial Loop)
Connect the output of the last of the effect(s) connected to the Send output of the serial loop here.
SEND Output (Mix Loop)
Connect the first effect(s) you want to run in the Mix Loop here. The Mix Loop is the standard loop signal path of the Basswitch IQ DI. It has several additional features that allow you to optimise the signal routing in the Mix Loop. The order of effects depends on the taste of the individual user and the application environment, but in case of doubt we recommend the following order for bass instruments: octaver overdrive/distortion envelope-filter – chorus/flanger – tremolo – delay – reverb. Note: The loop path is located after the mute-function; this means that for instance an echo will be heard fading away even if the pedal is muted.
Out‑of‑phase switch PHASE (Mix Loop)
Invert the phase of the return-signals of your effect here if needed. When mixing the original signal with the return-signal from the effect the two signals may cancel each other out under certain circumstances. Most commonly the sound will be described as “thin” in these cases. Inverting the phase solves this problem. Under most circumstances this switch will be in the “off” position (up= in phase). To invert the phase put the switch in the down position. Note: It is ultimately for the user of the Basswitch IQ DI to decide what sounds better for the given circumstances. Just try it out and decide what sounds best to you
RETURN Input (Mix Loop)
Connect the output of the last of the effect(s) connected to the Send output of the Mix Loop here. If the Return input is not in use, the Mix Loop button works as a clean booster. Note: Use a TRS jack (Tip Ring Sleeve) to obtain a symmetrical return input and a normal jack for an asymmetrical connection.
VOLUME Control (Channel A)
This control adjusts the volume of Channel A. To permit optimal matching of the volume between Channel A and Channel B this control enables you to boost and to cut the signal, the neutral position is at 12 o’clock. The high‑end preamp of the Basswitch IQ DI allows you to connect the Basswitch IQ DI directly to a power amp
BASS Control (Channel A)
Use this control to adjust the amount of bass in your tone
LM Control (Low Mid Gain)
Use this control to adjust the amount of low mids in your tone
LF Control (Low Mid Frequency)
Use this control to select the low-mid frequency you want to adjust
HM Control (High Mid Gain)
Use this control to adjust the amount of high-mids in your tone.
HF Control (High Mid Frequency)
Use this control to choose the high-mid frequency you want to adjust
TREBLE Control
Use this control to adjust the amount of treble/presence in your tone.
BOOST Control (Mix Loop)
Use this control to adjust the Mix Loop send level or the solo boost level.
MIX Control
Use this control to adjust the amount of effect signal from the Mix Loop that you want in your signal
MIX LOOP/BOOST Footswitch
Press this switch to activate the Mix Loop and/or the solo booster.
MIX LOOP/BOOST status LED
The LED turns blue when the Loop/Boost function is turned on.
MUTE footswitch
Push this switch to activate the mute function for tuning or stand-by
A/B footswitch
This footswitch serves to toggle between input INST A and input INST B and between Channel A and Channel B of the Basswitch IQ DI if only input INST A is in use
A/B status LED
This LED shows the status of the A/B function (Blue = input INST A or Channel A; white = input INST B or Channel B).
GROUND button
Press the ground button to eliminate hum
PAD button
Push the pad button to attenuate the output signal
PRE/POST pushbutton
Press the pre/post button to take the EQ and the effect loops out of the D.I. signal path.
D.I Out
Use the D.I. OUT to connect to a mixing desk via an XLR cable

Power

External power supply
Connect your external power supply here (9-20V; min. 130mA). Because of the uncompromising design, the quality of the components, the large number of functions and the switching technology used, the power consumption of the Basswitch IQ DI is too high for it to run satisfactorily on batteries. The external power supply should provide not less than 9V and not more than 20V. Either alternating (AC) or direct current (DC) sources can be used and the polarity is not relevant. The voltage supplied is internally rectified, filtered, stabilised and then brought to 18V. A suitable connector for the Basswitch IQ DI power supply socket is included and can be soldered to the external power supply connection cable if needed. Note: To get the best out of your pedal setup we recommend that you use high‑quality power supplies with isolated output sections in your set‑up!
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