Apex 430 microphone Review

The Apex 420 and 430 are large-diaphragm condensers with transformer-coupled circuits. They differ only in that the 420 offered a Cardioid/Omni switch, while the 430 has a fixed Cardioid polar pattern.

Note that the cutsheet for the Apex 420 and 430, dated 2004, states that only the model 420 has a switchable high-pass filter. But every sample 430 we have seen also includes this option, presumably because it cost them less to use the same circuit boards on both models.

Apex 430 PCB The circuit is nearly identical to that of the MXL 2001; the sole visible differences are that the 420/430 PCB has a pushbutton switch and one additional capacitor. These two parts comprise a switchable high-pass filter.

Early versions of the Nady SCM-900 used a circuit board pair identical to the Apex 430.

The Apex 430 that we’ve seen had a 2SK30A JFET and a polystyrene input coupling capacitor. These are seen infrequently in newer Chinese-made microphones, which almost universally use the 2SK170 JFET and ceramic coupling capacitors.

The Apex 430 shipped with an elastic shockmount.


Pickup Patterns Pads & Filters
Cardioid (15 mV/Pa; 20 - 20, 000 Hz)
  • Filter: HPF: -6dB/octave @ 100 Hz (Via Switch)
Capsule Dimensions Impedance SPL/Noise
Diameter n/a
n/a Max SPL: 130 dB
Weight Length Max Diameter Interface(s)
490g (17.28oz) 192mm (7.56'') 52mm (2.05'')

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I have read anecdotal reports

by BlastroKnow

About using condoms for microphone protection but it does just seem like part of the freq range is going to be impeded. It certainly would be easy enough {especially if you have 2 of those things since you are talking blumlein} to set both mics up one sheathed and one not and record some white noise and look for any frequency suppression with spectral analysis.
And blumlein at the beach brings up 2 logistic questions - how are you powering those things? and blumlein takes some tricky stand work to get configured so extra stand parts to haul and a flat solid place to actually set them up.

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