Quest Engineering QA 4004, Руководство пользователя

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SPECIFICA
TIONS
QA SERIES
User Manual
User Manual QA Series
Power Amplifiers
11
Quest Engineering QA Series Amplifiers: Specifications*
QA 1004 QA 2004 QA 3004 QA 4004
Rated Power
(2 x 8 Ohms)
290 W per channel
@ 1 kHz at <0.1%
T.H.D.both channels
driven 490 W per channel
@ 1 kHz at <0.1%
T.H.D. both channels
driven
660 W per channel @ 1
kHz at <0.05% T.H.D.
both channels driven
1,090 W per channel
@ 1 kHz at <0.05%
T.H.D. both channels
driven
Rated Power
(2 x 4 Ohms)
575 W per channel
@ 1 kHz at <0.1%
T.H.D.both channels
driven
870 W per channel @
1 kHz at <0.1% T.H.D.
both channels driven
1100 W per channel @
1 kHz at <0.05% T.H.D.
both channels driven
2,000 W per channel @
1 kHz at <0.05% T.H.D.
both channels driven
T.H.D.
<0.1%@250 W per
channel from 20 HZ
to 20 kHz
>0.1% @ 400 W per channel from 20 Hz to 20 kHz
>0.5% @ 400 W per
channel from 20 Hz to
20 kHz
Minimum Load
Impedance
4 Ohms – sine wave 4 Ohms – sine wave
Phase Response +5 to -15 from 20 Hz to 20 kHz
+20 to -25 from 20 Hz
to 20 kHz
Input Impedance 20k Ohms, balanced; 10k Ohms, unbalanced
20k Ohms balanced
10k Ohms unbalanced
Cooling
Two temperature dependant variable speed 80mm high output DC fans
Two temperature
dependant variable
speed 120mm high
output DC fans
Controls
Two front panels attenuators, rear panel mode switch and gain select switch
Two front panels
attenuators, rear panel
mode switch and gain
select switch
Hi Pass:
Linkwitz-Reily
(24 db/Octave)
Off/35/80 Hz Off/35/80 Hz
Low Pass:
Linkwitz-Reily
(24 db/Octave)
Off/80/110 Hz Off/80/110 Hz
Voltage Gain
@ 0.775V
29 dB or 24 dB 32 dB or 26 dB 35 dB or 29 dB 38 dB or 32 dB
Crosstalk >-60 dB @ 1 kHz at rated power @ 8 Ohms
>-60 dB @ 1 kHz at
rated power @ 8 Ohms
>-60 dB @ 1 kHz at
rated power @ 8 Ohms
Hum and Noise
>-105 dB, “A” weighted
referenced to rated
power @ 8 Ohms
>-107 dB, “A”
weighted referenced to
rated power @ 8 Ohms
>-107 dB, “A” weighted
referenced to rated
power @ 8 Ohms
>-104 dB, “A”
weighted referenced to
rated power @ 8 Ohms
Slew Rate >30V/us >40V/us >44V/us
Damping Factor
(8 Ohms)
>500:1 @ 20 Hz - 1 kHz >700:1 @ 20 Hz - 1 kHz >800:1 @ 20 Hz - 1 kHz
Protection
Thermal, DC, turn-on bursts, subsonic, incorrect loads
Thermal, DC, turn-on
bursts, subsonic,
incorrect loads
Connectors XLR, Speakon speaker output, 240/230 V 16 amps IEC mains
XLR, Speakon speaker
output, 240/230 V 20
amps IEC mains
Construction Cold Steel R Machined aluminium front panel
Cold Steel R
Machined aluminium
front panel
Dimensions 89 x 483 x 496 mm 132 x 483 x 496 mm
Net Weight
17 kg 21 kg 23 kg 35 kg
Packaged
Shipping Weight
20 kg 23 kg 26 kg 38 kg
* All specifications are correct at time of printing, Quest Engineering reserves the right to change
specifications at any time and won’t be held responsible for any typographic errors in this publication.