Vintage Phone Microphone 2

History

The KTAS KIRK F68 rotary telephone is considered Denmark’s most popular and iconic telephone of all time. It was produced in 1968-1978 and was available in the colors: Gray, Umber, Green, Yellow and Red. The same phones were produced in the other Scandinavian countries in several other brands and colors: White, Gray, Black, Red, Dark Green and Yellow.

Kristian Kirks Telefonfabrikker was founded in 1892 by Emil Møller. It was taken over by Kristian Kirk in 1923 and became one of Denmark’s leading manufacturers of telephone equipment. The company played a central role in the development of Danish telecommunications and collaborated closely with Kjøbenhavns Telefon Aktieselskab (KTAS), which was established in 1881 and later covered large parts of Zealand, Bornholm, Lolland and Falster.

KIRK F68 is considered an iconic piece of Danish design and has become a sought-after collector’s item. Its simple aesthetics and historical significance make it popular among collectors and design enthusiasts. The model represents an important era in Danish telecommunications history and is a symbol of technological development in the mid-20th century.

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About

The phone is converted into a two different microphones and complies with studio recording standards. Both microphones narrows the frequency band into the range of 200hz – 4000hz. The phone was build this way to filter unwanted static noise from the telephone signal. The result was a LO-FI speaking voice, that was easily understandable to the human ear.

The two microphones have different sonic characteristics. The dynamic microphone has the classic narrow telephone sound of the familiar landline phone calls of the 80s and 90s. The carbon microphone has a crisp and distorted sound, with higher output and self-noise. Only one microphone can be active at a time. The dynamic microphone will be active during normal use. A relay will automatically switch to the carbon microphone when 48v phantom power is applied to the signal.

Without any eq or mixing tricks, can the microphones deleiver an authentic sound of a vintage phone. It can be used as a voice effect for music or podcast recordings. The sound of the phone can also be used as coloration of various instruments during a recording session. It is suitable for voices, guitars, drums or rooms. In a mixing situation can the recording from the Vintage Phone Microphone 2 be blended with another recording to give coloration.

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Specifications

The Vintage Phone Microphone 2 has two types of microphones: dynamic and carbon.
The active microphone is determined by the use of 48v phantom power.

Basic Information:

• Dynamic and Carbon Microphone
• Contoured frequency response for LO-FO voice, instrument and room recordings
• Colored plastic construction
• Dimensions: 215 x 215 x 120 mm
• Weight: 1100 g
• Incl. mic holder clamp
• Spring Cable Lenght: 250 cm
• Connection via XLR plug

Dynamic Microphone Spec:

• Output Impedance: 200 Ohm
• Frequency response: 250 – 4000 Hz
• Self-noise: Moderate (~7.4 dB @ 56 dB gain)
• Sensitivity: Low
• Distortion: Low / Moderate
• Character: Mid-focused, “telephone” sound

Carbon Microphone Spec:

• Output Impedance: 600 Ohm (transformer balanced)
• Frequency response: 200 – 3500 Hz
• Self-noise: High (≈15–25 dB equiv.)
• Sensitivity: High
• Distortion: High (nonlinear compression)
• Character: Aggressive, compressed, gritty

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Disclaimer

The Vintage Phone Microphone 2 may have scratches and discoloration to varying degrees. We have done our best to clean and polish everything. But after all, these are products that are more than 40 years old.