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Onoffer is a pair of hypercardioid Countryman Associates Inc ISOMAX 2 microphones. Each microphone has an ISOMAX 2 BPM (orbattery power module) to power the FET amplifiers. Thesemicrophones were given to me in payment for some electronic design work I haddone. They are studio quality but arerelatively old The BPMare serial numbered 10159 and 10179 and each require 2 X PP3 9V battery to provide the phantom powerfor the the microphone FETamplifiers that are concealed inside the XLR connector of the microphone.
The BPM are not required if the mixer/preamplifier can supply phantom power between 6V to 48V
I didnot want to use the microphone with the BPM. Microphone serial number 14930828is disconnected from its FET amplifier . Connection to the microphone is via the 3m long screened twisted pair.The connections are differential signal+ (red), differential signal-(green) andscreen. Microphoneserial number 14930827 has not been modified and is terminated at themanufacturer’s FET amplifier housed inside a 3 pin XLR connector. The BPM LED stops flashing when microphoneSN 14930827 is plugged into the BPMwith batteries. Themicrophones are sized 4mm x 8mm x 16mm. The body is marked front and rear and aletter H to indicate a hypercardioid polar pattern as shown in the picturesection. NB 9Vbatteries are not included in this sale. I nolonger have the equipment to test these microphones and because one of themicrophones is disassembled they areoffered for spares or repairs
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