Rational Acoustics RTA 420 Measurement Microphone With Correction Curve.

13,615.00 + 18% GST at Checkout

The RTA-420 with Correction Curve (Popularly referred to as ‘With Calibration File’) is an individually Measured and Serialised version of the popular RTA-420 Mic.

Available on backorder


RATIONAL ACOUSTICS RTA-420 With Correction Curve.

The RTA-420 with Correction Curve (Popularly referred to as ‘With Calibration File’) is an individually Measured and Serialised version of the popular RTA-420 Mic.

The Calibration Files can be retrieved Online via the RTA-420 Microphone Correction Curve Database by entering the serial number of your microphone.

The downloaded folder consists of 2 Correction Curves, namely 1)Free-field Narrow Band & 2)1/3 Oct along with a detailed PDF Lab Report of your individual Mic.

Kindly Note : The Correction curves are specific to your Serial Number and only your mic and is not interchangeable with other Mic.

It is an ideal budget-friendly cost-effective solution for multi-mic measurement setups.

The RTA-420 offers very respectable frequency response, heavy-gauge steel construction, and measurement performance to rival high-end microphones costing many times more.

The RTA-420 has a relatively low maximum SPL, so it is not ideal for critical or concert-level SPL measurement applications, however it is still capable of generating accurate data at modest levels. Where critical SPL measurement is an important factor, consider purchasing at least one microphone that is better suited for SPL measurement and reserve the RTA-420’s for your spatial frequency response measurements.

The Rational RTA-420 comes with a mic clip and a windscreen. It also includes a custom-designed soft carrying case that accommodates and organizes 2 microphones plus accessories.

NOTE: The Rational RTA-420 is PIN 3 HOT and requires the 10mm calibrator adapter for use with the iSEMcon SC-1 Microphone calibrator.


  • Capsule: ¼” Electret Condenser (housing diameter at capsule: 10mm)
  • Polar Pattern: Omnidirectional
  • Frequency Response Characteristic: Diffuse Field (Random Incidence)
  • Frequency Range: 20 Hz – 20,000 Hz
  • Nominal Sensitivity: 7 mV/Pa, +/-3 dB typical
  • Operating Voltage: 9-52V DC Phantom Power
  • Max SPL: approx. 110dB (1 kHz @ 1% THD)


  • 1 RTA-420 Microphone
  • 1 soft-sided dual-mic carrying case
  • 1 mic clamp
  • 1 windscreen


The RTA-420 carries a one (1) year warranty against defects in materials and workmanship.  The warranty is valid from the date of original retail purchase and is a non-transferable warranty that extends only to the original purchaser.  We will replace the product at no charge if the product proves to be defective upon evaluation.

Warranty does not cover or apply to (a) misuse, mishandling, and abuse, (b) products that have been modified, altered or repaired by an unauthorized party (c) normal wear and tear, (d) damage that has occurred during shipping, (e) loss or theft, (f) damage caused by accident, fire, flood, lighting or other force majeure events.

The RTA-420 contains NO field-serviceable parts, so if your mic stops working correctly please do not attempt to open the mic or repair it yourself, as this will immediately void the warranty.

For warranty claims, email our Support with a description of your mic’s malfunction and proof of purchase (your order receipt, or order # & date of purchase).


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