Soundcraftsmen AE2420-R analyzer/equalizer

Soundcraftsmen's  AE2420-R  Analyzer/Equalizer is claimed to be a "revolutionary breakthrough" in enabling accurate analusis of a room's "imperfections", as ell as compensating for system imperfections. A new concept is used to apply differential/comparator circuitry  to equalization analysis. By sampling the complex waveshapes of a pink noise input signal on the one hand, and the speaker output signal on the other hand, the circuitry of the device converts the complex wave shapes to DC levels; these are then compared through the differential/comparator circuit to provide readout of the exact differential between these two complex waves shapes with an accuracy of 1/1oth dB. Even if the pink noise input amplitude is variable across the spectrum, there is no effect on the analyzer's dB readings because the analyzer is actually looking at both the selected frequency spectrum signals simultaneously, without regard to amplitude. Any good quality low- or high-impedance microphone may be used, regardless of the mike's response curve. The calibrated curve supplied by the microphone manufacturer can be programmed into the obtained flat response curve through use of the "computer charts" the maker of this device provides.

Specifications:

Analyzer Section

Differential Comparator: 

Minimum Input :  75 mV

Differential Measurement accuracy :  ±0,1 dB

Hi Level Input:

Input Impedance :  47 k Ω

Gain :  30 dB max (adjustbetter than)

Frequency Response :  ±0,1 dB 20 to 20,000 Hz

Mic Preamp: 

Input Impedance :  200 Ω or 20 k Ω (switchable Lo or Hi Z)

Gain :  80 dB max.

Frequency Response :  ±0,1 dB 20 Hz to 20,000 Hz

Pink Noise Source: 

Internal Generator Level :  approx. 300 mV

Bandpass Filter:

Center Frequencies :  30,60, 120, 240, 480, 960 Hz; 1,92; 3,84; 7,68; 15,36 kHz

Selectability:

11-position switch for selecting each of the 10 individual Bandpass Fiters, or All pass, for initial LED balancing.

Equalizer Section

Harmonic Distortion:  less than ,01% at 2 V

IM Distortion:  less than ,01% at 2 V

Signal-to-Noise Ratio: 

105 dB at 10 V output

100 dB at 2 V output

Octave Controls:

±16 dB boost or cut-each octave (all octaves set at max)

±12 dB boost or cut-each octave 9all octaves set at zero)

Gain Cut Capability:  +22 dB / -23 dB (all controls at maximum)

Zero gain Controls:  18 dB range

Filter Type:  Op-Amp synthesized inductors

Dimensions (W x H x D):  19" x 5-3/4" x 11-3/4"

Weight:  21 lbs