Infinity Intermezzo 4.1t, Service Manual

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INTERMEZZO 4.1t
4
Detailed Specifications
LINE VOLTAGE Yes/No Hi/Lo Line Nom. Unit Notes
US 120vac/60Hz Yes 108-132 120 Vrms Normal Operation
EU 230vac/50 – 60Hz Yes 207-264 230 Vrms Normal operation, MOMS required
Parameter Specification Unit QA Test Conditions Notes
Limits
Amp Section
Type (Class AB, D, other)
AB --- HC-BASH Power Supply
Load Impedance (speaker) 8 Ohms Nominal Resistor Load
Rated Output Power 1000 Watts 850 @ 30Hz, THD 15%, Limiter defeated
THD@ 680W 1 % 5 22k filter, 30Hz, LPF “Off”
THD @ 1 Watt 0.05 % 0.3 22k filter, 30Hz, LPF “Off”
Polarity (Input vs Output) 0 deg. 0° ±20 @ 30Hz; LPF “Off” .250 faston (+)……205 faston (-)
DC Offset 1 mV-DC 1.5 @ Speaker Outputs
Damping factor > 50 DF
Input Sensitivity
Input Frequency
30 Hz 30 Nominal Freq. 1 input driven
Line Input 43 dBr ±2 STO 1 Watt, @30Hz LPF “Off,” Gain Max.
Speaker/Hi-Level Input 14.5 dBr ±2 STO 1 Watt, @30Hz LPF “Off,” Gain Max.
Signal to Noise
SNR-A-Weighted
100 dBA 90 relative to 680W output A-Weighting filter
SNR-unweighted 90 dBr 80 relative to 680W output 22k filter
SNR rel. 1W-unweighted 60 dBr 50 relative to 1W output 22k filter
Residual Noise Floor 2 mVrms 3 Volume @max, using RMS reading DMM/VOM (or A/P)
Residual Noise Floor 1 mVrms (max) 3 Volume @max, w/ A/P Swept Bandpass Measurement (Line freq.+ harmonics)
Input Impedance
Line Input
10k ohms Nominal
Speaker/Hi-Level Input 1k ohms Nominal
Active Filters
Low-Pass (fixed or variable)
fixed --
Frequency 80 Hz
Slope 24 dB/Octave
Q 0.7 Damping
Low-Pass (fixed or variable) fixed --
Frequency 24 Hz 10k-ohm resistor added in series with
Slope 6 dB/Octave feedback cap. for shelving effect.
Q 0.7 Damping
Subsonic Filter (HPF) fixed --
Frequency 12 Hz
Slope 12 dB/Octave
Q 0.7 Damping
Line-Out Filter (HPF) fixed -- nonswitchable Low level output to satellites
Frequency 80 Hz
Slope 12 dB/Octave
Q 0.7 Damping
High-Level Out Filter (HPF) no --
Parametric EQ (BOS)
Frequency Pot
yes -- 21 detent pot (0.1 oct. steps)
Range 20 – 80 Hz functional
Level Pot yes -- -- 21 detent pot (0.5dB steps)
Range 0 to –14 dB functional
Width (Q) Pot yes -- -- 21 detent pot (5 steps/0.1 octave)
Range 0.05 – 0.5 octave functional