RMI Classic Boost (discontinued)
Order code 5002
classic-booster-for-bass-with-DAW.png classic-booster-for-bass-with-amp.png classic-booster-for-bass-with-mixer.png
01-Gold-RS.jpg Gold-plated Relays & Switches
The signal from the pickups of an electric guitar or bass is so weak that poor-quality cables, cold joints and cheap contact materials ruin your sound. Switch contacts need to be made of special materials to permit loss-free switching of these low-level signals. All Lehle switchers feature special relays and slide switches with gold-plated contacts for totally reliable, absolutely zero-loss switching.
02-3-band-EQ.jpg 3-band EQ
An EQ is primarily intended to raise particularly desirable frequencies in a sound spectrum as well as filtering out the undesired ones. With the 3-band EQ this can be accomplished very intuitively.
With pot T you control the highs, M is responsable for the mids and with pot B the basses. The treble control is a shelving filter, while the mids and the bass frequencies are boosted or cut via bell filters. The frequencies of the EQ are perfect for upright and electric basses.
05-Gain.jpg Adjustable Gain
Adjustment of volume or distortion using a gain controller is a vital feature in many situations. The gain controllers on the corresponding Lehle products feature black anodized aluminium knobs set back into the housing so that they can be easily fingertip rotated but keep their settings during performances and transportation.
07-18V.jpg Voltage Internally Doubled to 18V
To exploit the dynamics of tube amplifiers to the full, the input voltage of Lehle products bearing this symbol is rectified from the power supply socket, then filtered, stabilized and doubled to 18V.
When we designed the Basswitch Classic Boost we had in mind classic passive P, JJ and PJ basses. This compact preamp combines the Basswitch IQ DI´s boost with a 3-band-eq especially voiced for vintage basses. Additionally the treble control combines a passive high frequencies reduction with an active high frequency boost.
This can substitute the installation of active electronics in the instrument, collectors or owners of vintage instruments will appreciate this, and your vintage bass will receive a new sonic shine without altering the characteristic sound of your instrument.
The Basswitch Classic Boost allows gain adjustment of +/- 15 dB and can be used as a stand-alone booster, it can be teamed up with the Basswitch IQ DI for more options or work as a compact standalone preamp in front of an active monitor or bass cab.
The approved Lehle True Sound Technology ensures a great tone: starting from the discrete JFET input stage, up to the switching via gold-plated relais this booster offers a more than studio-standard dynamic range of over 110 dB with very little noise. The Basswitch Classic Boost works internally with 18 V, but is content with all power supplies between 9 – 15 V AC or DC. The extremely robust construction with its protected controls and indestructable switching mechanism will provide many years of joy with classical boosting!
Bass Player - 10/2014
(read the whole Review)
Author: Ed Friedland

Soundroom: Ruppert Musical Instruments Basswitch Classic Boost, Clean Boost, and Sonic Spark Pedals
Hi-fi quality, well-tuned EQ
Great sounding,flexible preamp[s] with a small footprint. The tone seemed smoother even before I activated the switch.
The Clean Boost is a versatile EQ/pre that handles the signal with accuracy, and wide-open dynamics, while its close relative the Classic Boost offers a nostalgic reference back to the days of tube processing.

Audiofanzine - 09/2014
(read the whole Review)
Author: David LO PAT

Test du RMI Classic Boost
Ma voisine n’aime pas le classic

Points forts
- La solidité
- Le son et l’égalisation à la fois efficace et fidèle
- Le Buffured Bypass
- Conception du footswitch

Bass Quarterly - 09/2014
(read the whole Review)
Author: Lutz J. Mays

Bass witches
RMI Basswitch Preamps – Sonic Park, Classic Boost, Clean Boost

Both boosters sound excellent, without hiss or loss of sound. You can spice up your passive bass a bit or just add some of meat to your tone.
Even with my double bass I liked the Classic Boost.

Guitar - 09/2014
Author: Jürgen Richter

Clean and dirty
Finally! Lehle pedals for bass players!
All in all, both pedals [RMI Classic Boost and RMI Clean Boost] deliver an enormously fresh and dynamic signal, which is especially useful for passive basses and long cable distances.
Inserted at the beginning of the effects chain, all three pedals provide a clean and uncomplicated signal, even when they are switched off.
The frequencies of both controls are neatly chosen. Even extreme settings sound musical.

Bonedo - 08/2014
(read the whole Review)
Author: Oliver Poschmann

Triplets aboard
RMI Basswitch Classic Boost , Clean Boost and Sonic Spark.

The best things come in threes! This applies for the RMI Basswitch Boost Pedals, too.
Pro: Outstanding quality of sound, very good manufacturing.

Gitarre&Bass - 08/2014
(read the whole Review)
Author: Dirk Groll

RMI Basswitch Classic Boost, Clean Boost & Sonic Spark
The Soundimprovers

The classily designed and competently built Basswitch pedals reliably provide a high sound quality by picking up every little detail from your instrument and convert it into a solid output signal, which you can also route directly into a mixer or an A/D converter.
The high quality of the well balanced Basswitch pedals is also apparent in their exemplary noiselessness.