Gear article
Takamine CT4B-II Active Preamp
The Takamine CT4B-II is a high-quality active onboard preamp designed for acoustic-electric guitars. It features a three-band equaliser and a precision chromatic tuner, offering precise signal tailoring for professional performance and recording contexts.

Overview
The Takamine CT4B-II is a professional-grade active preamp system integrated into many of Takamine's high-end acoustic guitars. It is engineered to provide a transparent and flexible interface between the guitar's pickup and an amplifier or mixing console. The unit is known for its clean signal path and user-friendly interface, allowing players to make quick adjustments during live performances.
Technical Features and EQ
The CT4B-II is defined by its extensive control suite. The primary tonal shaping is handled by a three-band equaliser, covering Low, Mid, and High frequencies. Each band offers a +/- 5dB adjustment range, allowing for subtle corrections or significant tonal shifts. This range is specifically calibrated to achieve an optimum signal transfer without introducing excessive noise or distortion.
- Low: Adjusts the bass response to add body or reduce boominess.
- Mid: Controls the presence and clarity of the instrument.
- High: Manages the treble frequencies for added shimmer or to tame harshness.

Integrated Tuner and Pitch Adjustment
A standout feature of the CT4B-II is its highly accurate integrated chromatic tuner. The tuner allows for precise tuning in various environments and includes a pitch adjustment feature. Users can calibrate the tuner in 1Hz increments, allowing the guitar to be tuned to specific reference pitches outside of the standard A=440Hz, ensuring compatibility with different ensembles or personal preferences.
Performance and Character
The character of the CT4B-II is focused on clarity and fidelity. By providing a +/- 5dB range, Takamine prioritises a natural sound that respects the acoustic properties of the guitar. Unlike some high-gain preamps like the Fortin Meshuggah Signature or the Boss BP-1W, the CT4B-II is designed for clean acoustic reproduction rather than harmonic saturation or distortion.
Comparative Context
While other preamps serve specialised roles—such as the sE Electronics DM2 TNT for microphones or the Peavey Decade for specific guitar tones—the CT4B-II is a dedicated onboard solution for acoustic guitars. It offers a more integrated experience than outboard pedals like the Vox Valvenergy Tone Sculptor, focusing specifically on the needs of the acoustic performer through its built-in tuning and EQ ergonomics.
Related gear
£379.00 ($481)Fortin
Fortin Meshuggah Signature Pre-Amp Distortion
£1,165.00 ($1,480)Warm Audio
Warm Audio WA273-EQ 2-Channel Microphone Preamp with EQ
£129.00 ($164)Vox
Vox Valvenergy Tone Sculptor Tube Preamp Equalizer Pedal
£11.84 ($15)Behringer
Behringer PP400 Microphono Phono Preamp
£64.99 ($83)TritonAudio
TritonAudio FetHead Phantom Preamp for Condenser Microphones
£159.00 ($202)Peavey
Peavey Decade Preamp Pedal
£90.10 ($114)sE Electronics
sE Electronics DM2 TNT Active Inline Preamp
£149.00 ($189)Boss
Boss BP-1W Waza Craft Booster/Preamp Pedal
Frequently asked questions
- What is the primary function of the Takamine CT4B-II?
- The CT4B-II is an active onboard preamp designed to amplify and shape the signal of an acoustic-electric guitar. It provides essential tools like EQ and a tuner to prepare the signal for an amplifier or PA system.
- How many bands does the CT4B-II equaliser have?
- The unit features a three-band equaliser. This allows the player to independently adjust the Low, Mid, and High frequencies to suit their performance environment.
- What is the adjustment range for each frequency band?
- Each frequency band (Low, Mid, and High) provides an adjustment range of +/- 5dB. This allows for precise tailoring of the signal's clarity and balance.
- Does the CT4B-II include a built-in tuner?
- Yes, it features an accurate integrated chromatic tuner. This allows the player to check and adjust their tuning quickly without needing an external device.
- Can the tuner's reference pitch be adjusted?
- Yes, the tuner includes a pitch adjustment feature. It can be adjusted in increments of 1Hz to match the player's specific preferences or other instruments.
- What is the typical price for a replacement CT4B-II unit?
- The typical price for this preamp is approximately £179. Prices may vary slightly depending on the retailer and specific region.
- Is the CT4B-II an active or passive preamp?
- The CT4B-II is an active preamp. This means it requires a power source, typically a battery, to operate its EQ and tuning circuitry.
- How does the CT4B-II compare to a microphone preamp like the Warm Audio WA273-EQ?
- The CT4B-II is an onboard guitar preamp specifically for piezo pickups, whereas the WA273-EQ is a 2-channel microphone preamp for studio recording. They serve entirely different stages of the signal chain.
- Can I use the CT4B-II to add distortion like a Fortin Meshuggah preamp?
- No, the CT4B-II is designed for clean acoustic sound transfer. It does not provide the high-gain distortion characteristics found in metal-oriented preamps like the Fortin Meshuggah Signature.
- Is the CT4B-II compatible with condenser microphones like the TritonAudio FetHead?
- No, the CT4B-II is designed for guitar pickups. The TritonAudio FetHead is a specialized inline preamp designed specifically to provide phantom power or gain for microphones.
- What makes the CT4B-II suitable for live performance?
- Its combination of an integrated tuner and easy-to-use EQ sliders makes it ideal for live use. The +/- 5dB range allows for quick feedback control and tonal adjustments on stage.
- Is the CT4B-II the same as a Phono preamp like the Behringer PP400?
- No, the Behringer PP400 is a phono preamp for turntables. The CT4B-II is specifically engineered for the impedance and signal requirements of acoustic-electric guitars.
