Dynacord DPA 4245 Stereo Amplifier User Manual


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Technical Specifications: DPA 4245, DPA 4260
Amplifier at rated conditions, both channels driven, direct outputs with 8
Ω
loads, isolated outputs with rated load and voltage,
unless otherwise specified.
DPA4245 DPA4260
DUAL MODE Direct Output Isolated Outputs Direct Output Isolated Outputs
Output Definition 8Ω 4Ω 100V 70V 25V 8Ω 4Ω 100V 70V 25V
Load impedance or rated output voltage
Rated Load Impedance 28.5
Ω
14
Ω
1.8
Ω
20
Ω
9.8
Ω
1.25
Ω
isolated outputs only
Maximum Midband Output Power 240W 450W 410W 400W 390W 330W 600W 590W 580W 570W
THD=1%, 1kHz
Maximum Midband Output Voltage 44V 42.4V 108V 74.8V 26.5V 51.3V 49V 109.5V 75.4V 26.7V
THD=1%, 1kHz, RMS, rated load
Rated Output Power 230W 350W 350W 350W 350W 300W 500W 500W 500W 500W
THD <0.2%, 45Hz ... 20kHz,
>10min. according IEC 268-3
Rated Output Voltage 42.9V 37.4V 100V 70V 25V 49V 44.7V 100V 70V 25V
THD<0.2%, 45Hz ... 20kHz
Maximum RMS Voltage Swing 44V 125 V 87V 31V 52V 121V 88V 32V
THD=1%, 1kHz, no load connected
Frequency Response, -3dB, ref.1kHz 45 Hz .... 30kHz 45 Hz.... 22kHz 45 Hz .... 30kHz 45 Hz .... 22kHz
LO-Cut-Filter: 18dB/octave, 45Hz
HI-Cut-Filter: 12dB/octave, 30kHz
Voltage Gain 34 dB 34 dB 42 dB 39 dB 30 dB 35 dB 35 dB 42 dB 39 dB 30 dB
at 1 kHz
Input Sensitivity and Impedance 0dBu ( 775mV) / 20 kOhm
at rated condition
Slew Rate 25 V/µs 30 V/µs
Power Bandwith 45Hz ...50kHz 45Hz .... 25kHz 45Hz .... 50kHz 45Hz .... 25 kHz
THD=1%, ref. 1kHz, half power @ rated
load impedance
THD at rated output power, < 0.05% < 0.1% < 0.2% < 0.3% < 0.05 % < 0.1% < 0.2% < 0.3%
MBW=80kHz, 1 kHz
IMD-SMPTE < 0.08% < 0.1% < 0.3% < 0.5% < 0.08% < 0.1% < 0.3% < 0.5%
60 Hz, 7 kHz
DIM30 < 0.03% < 0.2% < 0.2% < 0.2% < 0.03 % < 0.2% < 0.3 % < 0.3%
3.15 kHz, 15 kHz
Crosstalk < -80dB
ref. 1kHz, at rated output power
Input Impedance 20 kOhm
20Hz ... 20 kHz, balanced
Damping Factor > 300 / > 200 > 300 / > 200
at 100Hz / 1kHz, direct outputs only
Insertion Loss 0.7 dB 0.8 dB 0.9 dB 0.7 dB 0.8 dB 1.1 dB
isolated outputs only
Signal to Noise Ratio > 100 dB
Rated output voltage to noise, A-weighted
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