忠於原聲、精準設計
德國設計、製作的專業前級電路品牌 “Noll Electronic” – 創始人Noll Klaus在歐洲超過30年的Bass/吉他前級電路設計經驗， Noll 已經被許多歐洲頂尖的製琴師及品牌採用，包含
Jens Ritter, Jerzy Drozd, Laurus, Adamovic…..，Noll 都為他們客製化特別的規格，因此可以看到Noll的網站上有各式各樣的配置型號。
市面上許多前級電路品牌都擁有自己的音色個性，許多人在購買電路升級後，電路的個性卻不一定能和琴本身匹配，導致失去了琴本身的特色，音色變得奇怪、不好聽，Noll Klaus 本身是一位彈奏者，他注意到這個現象，因此他所設計的前級電路就以”忠於原聲”為目標，使用更好的元件，不作過多渲染、只把音色的傳真度做到最好，Noll 的前級電路安裝在各種不同個性的琴上都能夠適切的凸顯每把琴獨特的個性。
由於 Noll 電路都出自於手工製作，因此他們專長於客製化前級和生產各式配置的電路，並且把電路尺寸最小化，讓他能夠在各種琴款上都能夠被安裝而不需要額外的空間。有別於許多廠牌的前級未預作焊接，Noll 電路出廠時都已經依據需求焊接連結好，使用者只需要做簡單的焊接工作就能夠安裝完成。
雖然只是一塊小小電路，卻能看到德國人對於設計細節的要求，像是採用MEC双層VR，封裝式電路板，耐拉扯的線材，確實堅固的焊工，都能在小小的一塊Preamp上看得見。Noll Klaus 30餘年的經驗，將前級電路的設計磨的爐火純青，最重要的設計理念就是將Pickup的信號透過自然、精準的類比電路傳達，沒有不必要的渲染，呈現反璞歸真的音色。
原廠官網 https://www.noll-electronic.de/
採用NOLL電路的製琴品牌
- Ritter Instruments, Germany
- BassLine, Germany
- Laurus, Italy
- Wahlbrink Basses, Germany
- Luthman, France
- Frameworks Guitars, Germany
- Prat Basses, USA
- Neubauer Guitars, Austria
- Rikkers Guitars, Netherlands
- SKC Bogart Bass, Germany
- Adamovic Guitars and Basses, Netherlands
- Herom Basses, Germany
- Jerzy Drozd Basses, Spain
- Schindehütte Gitarren, Germany
- Bassart Guitars, Germany
- Keith Guitars, USA
- Waja Bass, Germany
- Vektor Bass, Germany
- Bachmann Guitars, Italy
- Däsch Basses, Germany
- Egilegor Basses, Spain
- Jozsi Guitars, Germany
- Jacaranda Guitars, Italy
- Phil Bach, France
- Hot Wire Bass, Germany
- D’Alessandro Guitars & Basses, Italy
- Phantom Guitars, Germany
- JCR Luthier, Spain
- Loewenherz Basses, Germany
- Acy’s Guitar Lounge, Germany
- Knooren Handcrafted Instruments, Netherlands
- Zoot Bass & Purple Chili, Great Britain
- Schack Guitars, Germany
- Listerud Bass, Norway
- Cuntz Guitars, Germany
- Maruszczyk Instruments, Germany
- Rim Basses, Great Britain
- TM Guitars, Germany
- Tobias Pöhling, Germany
- Nature-Shock Instruments, Germany
- Viennaguitars, Austria
- Botec GmbH, Switzerland
- Jaegerguitars, Germany
- ZEAL-guitars, Germany
- GMR Bass Guitars, Poland
- Marco Bass Guitars, USA
- Joe Veilette Custom Lutherie, USA
- Regenerate Guitar Works, USA
- Mulderbass Custom Bass Guitars, Netherlands
- Unicornbass, Sweden
- Bergfels Guitars, Austria
- Loud Guitars, Italy
- Danou Guitars, Switzerland
- KD Basses, Bulgaria
- Marcus Guitars & Basses, Belgium
- Munich Repair Shop, Germany
- Gauthier Anciaux, Belgium
- Köllner Bass-Instruments, Germany
- Sign Guitars, Germany
- Joao Godinho Guitars, Luxembourg
- ROKS Instruments, Netherlands
- Denzo Custom Guitarz, Belgium
- Tief Töner Bässe, Germany
- Mozer Guitars, Netherlands
- Rockwood Music, Netherlands
- Grube Guitars, Spain
- Chitarre Lodato, Italy
- Eyb Guitars, Germany
- Wreck Guitars, Croatia
- Ulyate Intruments, USA
- Torun Instruments, North Cyprus
- CG Lutherie, France
TCM-3系列
TCM-3 是三頻段 (Bass/Mid/Treble) 前級電路系列，安裝容易而且所占空間很小，電池標準使用1個9v電池，也可以接2個9v (18v)擁有更大的headroom，可以和被動&主動拾音器連結。
電路所有的可變電阻、Jack、電池扣的焊接都用有彈性耐拉扯的線材連接，不包含Knob (可另購專用Knob)。電路的低阻抗輸出可以在30公尺的導線長度下仍然不會失去高頻響應。
| Input Impedance | >1 MOhm |
| Output Impedance | <10 KOhm |
| Input Sensitivity | max. 450mV @ 9V |
| Output Voltage | max. 4,5V @ 9V |
| S-N-Ratio | 96dB (1KHz/5Vss) |
| Bass Control | +/- 15dB @ 40Hz |
| Midrange Control | +/- 15dB @ 400Hz |
| Treble Control | +/- 15dB @ 4,2KHz |
| Operating Voltage | +9V (+18V optional) |
| Power Consumption | typ. 0,6mA @ 9V / 800h Batt. Life |
| Dimensions | 25x25x15 mm |
TCM-2系列
The NOLL TCM 2 is a compact equalizer that provides easy and space-saving installation. The secure insulation of the sealed equalizer perfectly protects other electrical components. Bass and treble controls are center-detented and allow 15dB of boost and cut with a gentle slope of 6dB per octave which results in a natural and true sound.
The equalizer is 9-Volt battery powered, adding an additional 9-Volt battery (18V) will ensure more headroom and longer battery life.
The NOLL TCM 2 onboard preamp can be combined with both active and passive pickups.
All units are prewired with high flexible cables, delivery contents all pots, jack and battery clip; however, knobs are not included.
The low impedance output of the TCM 2 provides other great features. You can run a cable for up to 100 feet (30 m) without losing high frequency response.
| Input Impedance | >1 MOhm |
| Output Impedance | <10 KOhm |
| Input Sensitivity | max. 450mV @ 9V |
| Output Voltage | max. 4,5V @ 9V |
| S-N-Ratio | 96dB (1KHz/5Vss) |
| Bass Control | +/- 15dB @ 80Hz |
| Treble Control | +/- 15dB @ 4,2KHz |
| Operating Voltage | +9V (+18V optional) |
| Power Consumption | typ. 0,4mA @ 9V / 1200h Batt. Life |
| Dimensions | 21x21x12 mm |