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