DS-2 Specifications
Acoustical – DS-2 /D-2 System
1
Frequency response
2
50-160 Hz ±3 dB
Maximum SPL
3
Continuous 136 dB
Peak 148 dB
Sensitivity
4
112 dB
Coverage (-6dB points)
Horizontal 120 degrees
Vertical 120 degrees
DS-2 Loudspeaker
Transducers (2) MS-15 15-inch cone driver
Impedance
Nominal 4 ohms
Minimum 3.5 ohms real part, 0 ohms imaginary part, at 80 Hz
Maximum Safe Amplifier Swing 140 Vpk
Enclosure Folded horn, multi-ply Finnish birch
Finish Black textured or charcoal-grey carpet (optional)
Physical Dimensions 21
1
⁄4" W x 56
3
⁄4" H x 30" D
Weight 250 lbs (113.6 kg)
Protective Grill Expanded metal screen frame, vinyl damped,
charcoal-grey foam covering
Connector Cannon EP-4 male, EP-5 male (Europe only)
Rigging Aircraft pan fittings
D -2 Control Electronic Unit
Input Type
5
Balanced ISO-Input,
™
10k ohms, 5k ohms per leg
Output Type Active push-pull, 300 ohms output impedance
Maximum Input Level
Balanced +21 dBu
Unbalanced +21 dBu
Maximum Output Level
Balanced +26 dBu
Unbalanced +20 dBu
Hum and Noise
6
<-90 dBV
Dynamic Range
7
120 dB
Sense Inputs 100k ohms true differential, opto-isolated
Crossover Frequency
Upper 160 Hz
Lower (Mode switch in “DS-2 & Sub” position) 65 Hz
Driver Protection Circuitry RMS limiter, true excursion limiter
Indicators
Sense/Amplifier Gain Detect Green/Red LED
RMS Limiter, Excursion Limiter Red LEDs
Power Supply Green LED
Controls
Front Panel Input attenuator, AC power switch
Preset Panel Mode switch, sub polarity switch, DS-2 power control
Rear Panel Ground lift switch, AC range switches
Connectors
Balanced Input/Output 3-pin XLR (A-3) female/male (front panel input optional)
Sense Inputs Banana jacks (4 dual)
Power 100-120/200-240V AC, 50/60 Hz (rear-panel switchable)
Physical Dimensions 19" W x 1
3
⁄4" H x 7
3
⁄4" D, standard rack mount
Weight 8 lbs. (3.6 kg)
Note 1:
Acoustical specifications are
for the minimum configuration
of two DS-2 cabinets, and are
measured on axis at 2 meters
from 1/R image (located at cabi-
net rear).
Note 2:
Half-space conditions, pink
noise input, in third-
octave bands.
Note 3:
Loudspeaker driven with “A”-
weighted noise (peak-to-RMS
ratio

≈

12 dB), with amplifier
rated at 600 W/channel at
4␣ohms. The DS-2 will accom-
modate amplifiers capable of
peak output levels up to

±

140␣Vpk.
Note 4:
Loudspeaker driven at 2 vrms
(1 watt @ 4 ohms).
Note 5:
ISO™ Input: Pins 1, 2 and 3
are transformer-isolated, and
shell is connected to chassis/
AC earth ground. Pin 3 positive
for positive pressure output.
Note 6:
“A”-weighted, unbalanced.
Note 7:
“A”-weighted noise floor to
maximum output.