Quad Electroacoustics ESL 2805 User Manual - page 7
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8
ESL Series
ESL Series
SPECIFICATION
CONSTRUCTION
Format:
Floor Standing Dipole With 3º Fixed Tilt Back
Type:
Multiple Electrostatic Drive Membranes
Membrane:
Ultra Low Mass ( 0.5gm ) Tensioned Film
Panel Elements:
2 X Bass; 2 X HF
2 X Bass; 2 X HF
Time Delay:
Progressive Concentric Rings
Chassis Structure:
Heavy Duty Composite Aluminium / Steel
ACOUSTIC PERFORMANCE
Maximum output:
2 N/m2 at 2m on axis
Sensitivity:
1.5m bar per volt referred to 1m.
(86 dB/2.83V rms equivalent)
Impedance:
8 Ohms nominal
Impedance Variation:
4 - 15 Ohms
4 - 20 Ohms
Maximum Input:
Continuous input voltage (rms): 10V
Programme peak for undistorted output: 40V
Permitted peak input: 55V
Frequency Response:
37Hz - 21KHz (-6dB)
32Hz - 21KHz (-6dB)
33Hz - 23KHz (useable)
28Hz - 21KHz (useable)
Directivity Index:
See Polar Diagrams
Distortion: (100dB at 1 metre)
Above 1000Hz
0.15%
Above 1000Hz
0.15%
Above 100Hz
0.5%
Above 100Hz
0.5%
Above 50Hz
1.0%
Above 50Hz
1.0%
ELECTRICAL
AC Input:
220-240V or 110-120V
Power fuse:
63 mA anti-surge, 200-240V
100 mA anti-surge, 100-120V
GENERAL
Power consumption:
6W
Dimensions: (HxWxD)
1040mm x 695mm x 385mm
1430mm x 695mm x
385mm
(add 25 - 55mm for feet)
(add 25 - 55mm for feet)
Weight:
Net 34.8 kg; Gross 73 kg
Net 41.6 kg; Gross 82 kg (pair)
All measurements made with a 230V AC supply
The right is reserved to alter performance and specification as required.
This equipment complies with the radio interference requirements as laid down in EU regulations
ESL 2805
ESL 2905
Specifications
Quad ESL 2805
Horizontal Directivity
100Hz
0
3 0
6 0
9 0
12 0
15 0
21 0
24 0
27 0
30 0
33 0
-1 0
-2 0
-3 0
-4 0
-5 0
Clio
18 0
1000Hz
z
0
3 0
6 0
9 0
12 0
15 0
18 0
21 0
24 0
27 0
30 0
33 0
-1 0
-2 0
-3 0
-4 0
-5 0
Clio
6000Hz
0
3 0
6 0
9 0
12 0
15 0
18 0
21 0
24 0
27 0
30 0
33 0
-1 0
-2 0
-3 0
-4 0
-5 0
Clio
18 0
250Hz
0
3 0
6 0
9 0
12 0
15 0
21 0
24 0
27 0
30 0
33 0
-1 0
-2 0
-3 0
-4 0
-5 0
Clio
2000Hz
0
3 0
6 0
9 0
12 0
15 0
18 0
21 0
24 0
27 0
30 0
33 0
-1 0
-2 0
-3 0
-4 0
-5 0
Clio
8000Hz
0
3 0
6 0
9 0
12 0
15 0
18 0
21 0
24 0
27 0
30 0
33 0
-1 0
-2 0
-3 0
-4 0
-5 0
Clio
315Hz
0
3 0
6 0
9 0
12 0
15 0
21 0
24 0
27 0
30 0
33 0
-1 0
-2 0
-3 0
-4 0
-5 0
Clio
18 0
3000Hz
0
3 0
6 0
9 0
12 0
15 0
18 0
21 0
24 0
27 0
30 0
33 0
-1 0
-2 0
-3 0
-4 0
-5 0
Clio
10000Hz
0
3 0
6 0
9 0
12 0
15 0
18 0
21 0
24 0
27 0
30 0
33 0
-1 0
-2 0
-3 0
-4 0
-5 0
Clio
500Hz
0
3 0
6 0
9 0
12 0
15 0
21 0
24 0
27 0
30 0
33 0
-1 0
-2 0
-3 0
-4 0
-5 0
Clio
18 0
4000Hz
0
3 0
6 0
9 0
12 0
15 0
18 0
21 0
24 0
27 0
30 0
33 0
-1 0
-2 0
-3 0
-4 0
-5 0
Clio
15000Hz
0
3 0
6 0
9 0
12 0
15 0
18 0
21 0
24 0
27 0
30 0
33 0
-1 0
-2 0
-3 0
-4 0
-5 0
Clio
800Hz
0
3 0
6 0
9 0
12 0
15 0
21 0
24 0
27 0
30 0
33 0
-1 0
-2 0
-3 0
-4 0
-5 0
Clio
18 0
5000Hz
0
3 0
6 0
9 0
12 0
15 0
18 0
21 0
24 0
27 0
30 0
33 0
-1 0
-2 0
-3 0
-4 0
-5 0
Clio
Horizontal Directivity
These are actual measurements taken from our reference samples. The directivity pattern is exceptionally well maintained
from very low frequencies to well beyond audibility. This consistent pattern ensures smooth spatial response with no
peaks and troughs. In addition, the virtually massless diaphragms of the ESL ensure near-instantaneous starting and
stopping with an almost total absence of hysteresis, providing lightning fast transients and phenomenal bass response.