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  3. GRAS 26AK

GRAS 26AK Microphone Box Calibration 1/2

26ak Gras 1/2 Inch Measurement Microphone With Box And Full Calibration Chart

( Brand: Gras ), ( Manufacturer Part Number: 26AK ), ( Model: GRAS 26AK ), ( Part Type: Microphone Box ), ( Form Factor: Condenser Microphone )

Review GRAS 1/2 Inch Measurement Microphone Box And Full Calibration Chart

The **GRAS 26AK 1/2" Microphone Box Calibration** is a precision-engineered solution designed for the accurate calibration and verification of GRAS 26AK 1/2-inch free-field and random-incidence microphones, ensuring peak performance and reliability in acoustical measurements. This specialized calibration kit is meticulously crafted to meet the stringent demands of professional audio engineering, research, and industrial applications where precision is paramount. The GRAS 26AK microphone, renowned for its exceptional sensitivity, wide frequency response, and robust construction, requires a calibration process that maintains its integrity over time, and this calibration box serves as the definitive tool for achieving that goal.

At its core, the calibration box is equipped with a **highly stable reference sound source** typically a precision pistonphone or a calibrated acoustic calibrator operating within a controlled environment to eliminate external interference. The enclosed design minimizes ambient noise and temperature fluctuations, which could otherwise compromise measurement accuracy. The box is outfitted with a **dedicated calibration interface**, allowing users to connect the GRAS 26AK microphone securely and reproducibly, ensuring consistent positioning relative to the reference source. This setup guarantees that the microphone s sensitivity, frequency response, and phase characteristics are assessed with unparalleled precision, adhering to international standards such as IEC 61672 or ANSI S1.40.

Beyond its primary function, the calibration box incorporates **advanced diagnostic tools** to streamline the verification process. Integrated with a **built-in amplifier and signal conditioner**, it ensures that the microphone s output is accurately measured across its full operational range, from low-frequency rumble to high-frequency detail. Users can also benefit from **automated calibration routines**, which simplify the process by reducing human error and accelerating the verification cycle. The box may further include **data logging capabilities**, allowing users to record calibration results for traceability and compliance with quality assurance protocols.

Constructed from **high-grade materials**, the calibration box is designed for durability and long-term reliability. Its robust housing protects sensitive components from physical damage, while its ergonomic design facilitates easy handling in laboratory or field settings. The interior is often lined with **acoustic damping materials** to further isolate the calibration environment, ensuring that measurements remain unaffected by external vibrations or reflections. Additionally, the box may feature **modular connectivity options**, accommodating various measurement systems, oscilloscopes, or sound level meters for seamless integration into existing workflows.

For researchers and engineers working in acoustics, speech recognition, noise control, or audio system optimization, the GRAS 26AK 1/2" Microphone Box Calibration is an indispensable asset. By maintaining the microphone s calibration with the highest possible accuracy, it ensures that critical measurements such as sound pressure levels, frequency responses, or directional characteristics remain consistent and reliable over extended periods. Whether used in a controlled laboratory setting or deployed in challenging field conditions, this calibration solution underscores GRAS commitment to excellence in acoustical instrumentation, providing users with the confidence that their measurements are both precise and trustworthy.

### Pros and Cons of Buying a GRAS 26AK " Microphone Calibration Box

#### **Pros**

1. **Precision Calibration** The GRAS 26AK is a high-precision reference microphone designed for accurate sound pressure level (SPL) measurements. It is widely used in acoustics, audio engineering, and research due to its low distortion and high sensitivity.

2. **Wide Frequency Response** With a flat frequency response from 5 Hz to 20 kHz, it provides reliable measurements across the entire audible spectrum, making it suitable for various applications, including room acoustics, noise measurement, and audio system calibration.

3. **Durability and Stability** Built with high-quality materials, the GRAS 26AK is designed to withstand harsh environments, ensuring long-term stability and repeatability in measurements.

4. **Compatibility with Calibration Boxes** The " mounting option allows it to be integrated into calibration systems, such as the GRAS 42AG or other compatible boxes, which provide a stable mounting surface and protection for the microphone.

5. **Traceability to International Standards** GRAS microphones are calibrated against international standards (e.g., IEC, ANSI), ensuring traceability and reliability in professional and research settings.

6. **Low Distortion and High Signal-to-Noise Ratio** The microphone s design minimizes self-noise and distortion, making it ideal for low-level sound measurements where accuracy is critical.

7. **Versatility in Applications** Beyond calibration, it can be used for sound level measurements, room acoustics testing, and even as a reference microphone in audio production.

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#### **Cons**

1. **High Cost** The GRAS 26AK is an expensive piece of equipment, often costing several thousand dollars. This makes it less accessible for hobbyists or small studios on a tight budget.

2. **Specialized Use Case** While highly accurate, it is primarily a calibration tool rather than a general-purpose microphone. Users may need additional equipment (e.g., preamps, analyzers) to fully utilize its capabilities.

3. **Requires Expertise for Optimal Use** Proper handling, calibration, and interpretation of data require technical knowledge. Beginners may struggle without guidance from experienced professionals.

4. **Limited Built-in Features** Unlike some modern microphones with digital interfaces or built-in processing, the GRAS 26AK is analog and requires external hardware for full functionality.

5. **Maintenance and Sensitivity** The microphone s precision components may require careful handling to avoid damage, and it may be more susceptible to environmental factors like humidity or dust if not properly protected.

6. **Not Ideal for Live Performance or Recording** Due to its size, weight, and specialized design, it is not practical for live sound applications or general audio recording compared to dynamic or condenser microphones.

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### **Conclusion**

The GRAS 26AK " microphone is a superior choice for professionals and researchers who require the highest level of accuracy in sound measurements, calibration, and acoustics testing. Its precision, durability, and traceability make it indispensable in controlled environments where reliability is paramount. However, its high cost, specialized nature, and lack of versatility for general audio work may not justify its purchase for casual users or those without professional needs.

### **Recommendation**

- **Buy if:** You are a professional acoustician, audio engineer, or researcher working in fields where precise SPL measurements are critical (e.g., room acoustics, noise control, or audio system calibration). The investment is justified for long-term accuracy and credibility.

- **Avoid if:** You are a hobbyist, podcaster, or musician looking for a general-purpose microphone. In such cases, a more affordable and versatile microphone (e.g., a high-quality condenser or dynamic mic) would be a better choice.

- **Consider alternatives:** If budget is a concern, explore other calibration-grade microphones (e.g., Br el & Kj r or other GRAS models) or used/refurbished units. Additionally, rental or shared access to such equipment may be an option for occasional users.

Ultimately, the GRAS 26AK is a "must-have" for professionals but unnecessary for most casual or non-professional applications.

Details:

It comes with a box for convenient storage and full calibration chart reference. Doesn't have LEMO cable. Made by the trusted brand GRAS, this model features a 1/2 diaphragm for high sensitivity and reliable performance.

part #: 26ak prices

  • $480.00-$6999.00

specifications micwisys:

  • brand: Gras
  • mpn: 26ak
  • model: Gras 26ak
  • part type: Microphone Box
  • form factor: Condenser Microphone

general micwisys:

  • Musical Instruments Gear > Pro Audio Equipment > Microphones Wireless Systems
  • condition: Used

payments micwisys:

  • wallet: Google-pay
  • credit card: Visa
  • other

shipping micwisys:

  • service: USPS Ground Advantage
  • cost: $15.00
  • type: Fixed
  • carrier: USPS
  • transit: 4-11 Days
  • class: Standard

seller micwisys:

  • rating: 100.0%
  • # reviews: 51
  • city: Menlo Park, California

returns micwisys:

  • policy: No Returns

offer micwisys:

  • availability: In Stock
  • options: Ship-to-home
  • best offers: True
  • started: May 19, 2026
  • sold: 0
  • quantity: 1
part type: microphone box, form factor: condenser microphone,
category: musical instruments > pro audio equipment > microphones wireless systems, sku: 16359605729376762,
Gras 26AK Is Similar To:
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2 offers $480.00–$6999.00 USD
  • Used. Offer #1 priced at $480.00 + $15.00 shipping estimate = $495.00* total. Doesn't have LEMO cable. Made by the trusted brand GRAS, this model features a 1/2" diaphragm for high sensitivity and reliable performance.+$15.00 shipping
  • Used. Offer #2 priced at $6999.00 + $20.00 shipping estimate = $7019.00* total. Micro Optical SV-6 glasses mounted display (no battery) with goggles and mount. GRAS 1/2" Standard Preamplifier with Integrated Connector.+$20.00 shipping

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