Measurement Microphone for Audio

Many audio do-it-yourselfers know how to perform measurements on tube amps. Accurate measurements of speakers or room acoustics, however, is more complicated. Good and reliable sets are available but expensive. We don’t reinvent the wheel with the CF-1 microphone. It is a low voltage electret condenser microphone, designed for easy measurements of loudspeaker systems and room response. It comes in very handy for matching vintage drivers like Saba Greencones or Lowthers. The CF-1 was designed for the DIYer and provides a cost effective solution for many acoustic measurements. The high quality Panasonic electret capsule features low cost and a wide smooth frequency response. You will find the same capsules even in much more expensive devices. The small diameter of this microphone allows for near field measurements and reduces sonic reflections to a minimum. The CF-1 does not need expensive external phantom power. Many preamps provide a power supply on the microphone input. The CF-1 can even be powered using a standard 9V battery. For best results, however, we strongly recommend to use the microphone calibrated in combination with our preamp. For more information visit our site calibration.

A small battery-powered high quality preamp kit is available. The preamp is flat from 20-20.000 Hz (+2dB). See the product description for details. The CF-1 and the preamp kit are an excellent combination for audio measurements. No additional hardware is needed. Free software is easily available that can turn your PC into a powerful audio analyzer. The preamp is available in two versions. We offer a kit that contains only PCB and SMD parts. The full assembly kit contains all parts including a box, RCA sockets, a switch and the LED.

For the calibration we use a CF-1 that was calibrated with a Brüel & Kjær reference microphone (capsule type 4188, preamp type 2669L) . We perform near field measurements of both the DUT and the calibrated CF-1. As a final step we calculate a substraction curve that can be used with your favourite audio software.

CF-1 Measurement Microphone

unit price 19,50 EUR
(with 19,00%VAT and without Shipping)

Cost effective measurement microphone suited for acoustical measurements including loudspeaker design, sound system setup and room acoustics. The CF-1 does not require 48 volts phantom power. You can connect it to microphone inputs that provide a DC power of 5-9 volts. We can offer the microphone with its own calibration chart providing its sensitivity and the frequency response curve. You can use this calibration file with audio measurement software like ARTA or Hobbybox.

Technical Data
Sensitivity: 5 mV/Pa/1 kHz ± 3 dB
Frequency Response: 20-20000 Hz
Output Impedance: 2,2 kΩ
Power Supply DC: 2-10 V (0,5 mA)
Signal-to-Noise Ratio: > 58 dB
Dimensions: 250 x 8 mm
Weight: 50 g
Connector: RCA (Cinch)

Windshield for CF-1 Microphone

unit price 2,90 EUR
(with 19,00%VAT and without Shipping)

High quality microphone windshield of black foam. For microphones with 7-9mm. Dimensions: 14mm x 15mm.

 

 

 

AF-1 Preamplifier Kit (PCB and SMD parts)

unit price 6,90 EUR
(with 19,00%VAT and without Shipping)

Preamplifier kit for the CF-1 measurement microphone (PCB and SMD parts). A 9 volts battery block is required (not included).

Technical Data
Sensitivity: 2 mV
Frequency Response: 15-20000 Hz ± 2 dB
Input Impedance: 2,2 kΩ
Power Supply DC: 5-15 V (0,05 mA)
Gain: 20-40 dB
PCB: 40 x 55 mm
Box: 23 x 65 x 85 mm

AF-1 Preamplifier Kit (all parts included)

unit price 18,90 EUR
(with 19,00%VAT and without Shipping)

Preamplifier kit for the CF-1 measurement microphone. Complete kit including box, RCA sockets, switch and LED. A 9 volts battery block is required (not included).

Technical Data
Sensitivity: 2 mV
Frequency Response: 15-20000 Hz ± 2 dB
Input Impedance: 2,2 kΩ
Power Supply DC: 5-15 V (0,05 mA)
Gain: 20-40 dB
PCB: 40 x 55 mm
Box: 23 x 65 x 85 mm

CF-1 Calibration Service

unit price 10,00 EUR
(with 19,00%VAT and without Shipping)

We offer a simple yet very useful calibration service for our CF-1 measurement microphone. The calibration chart provides its sensitivity and the frequency response curve. You can use this calibration file with audio measurement software like ARTA or Hobbybox. Notice that you have to use our preamplifier kit. Otherwise the calibration file will not provide valid results. For more information visit our site calibration.

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