Bosch EVF-1181S EVF-1181S-BLK User Manual

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The QRx series has become the standard for regional 

sound companies, rental professionals and contractors 

who want compact high-performance loudspeakers with 

concert-grade EV components. Covered with rugged 

EVCoat, QRx looks great stacked, on poles, as monitors 

or flown with simple, integrated, L-track rigging points. 

Unique, fully-rotable asymmetrical waveguides have a 

15-degree downward bias to ensure high-frequency 

coverage without the need to tilt the enclosure toward the 

audience. our powerhouse DH7 large-format driver (3" 

voice-coil, 1.4" exit) provides the high-frequency engine, 

while a selection of DL and EVX woofers anchor the 

low and sub frequencies. The combination of high-level 

components, unique design and versatility make QRx series 

one of the best values in the industry.

QRx 112/75

QRx 115/75

QRx 153/75

QRx 212/75

QRx 212H/75

QRx 118S

QRx 218S

Frequency Response (-3 dB)

75 Hz – 15 kHz

60 Hz – 15 kHz

50 Hz – 16 kHz

75 Hz – 16 kHz

75 Hz – 15 kHz

45–150 Hz

38–125 Hz

Frequency Range (-10 dB)

52 Hz – 18 kHz

45 Hz – 16 kHz

42 Hz – 20 kHz

52 Hz – 18 kHz

52 Hz – 18 kHz

30–250 Hz

31–250 Hz

Recommended High-Pass Frequency 45 Hz (12 dB/octave)

45 Hz (12 dB/octave)

—

45 Hz (12 dB/octave)

45 Hz (12 dB/octave)

36 Hz (12 dB/octave)

35 Hz (12 dB/octave)

Axial Sensitivity (SPL, 1 W @ 1 m)

(Biamp operation)

98 dB Passive 

(100/112 dB)

98 dB  

(98/110 dB)

98/105 dB

—

102 dB  

(102/112 dB)

100 dB Passive

(100/112 dB)

98 dB

—

102 dB

—

Max. SPL @ 1 m (calc.)

131 dB

130 dB

130 dB

135 dB

133 dB

137 dB

1

139 dB

Power Handling (Continuous, Peak)

350, 1400 W

450, 1800 W

—

600, 2400 W

600, 2400 W

600, 2400 W

1200, 4800 W

Power Handling, Biamp: Continuous

Peak

LF 300 W/HF 75 W

LF 1200 W/HF 300 W

LF 400 W/HF 75 W

LF 1,600 W/HF 300 W

LF 400 W/MB-HF 150 W

LF 1600 W/MB-HF 600 W

LF 600 W/HF 75 W

LF 2400 W/HF 300 W

LF 600 W/HF 75 W

LF 2400 W/HF 300 W —

—

Coverage (nominal -6 dB) H x V

75° x 50° 

(up 15°, down 35°)

75° x 50° 

(up 15°, down 35°)

75° x 50° 

(up 15°, down 35°)

75° x 50° 

(up 15°, down 35°)

75° x 50° 

(up 15°, down 35°)

Omnidirectional

Omnidirectional

LF Transducer

12" DL12BFH

15" DL15X

15" DL15ST

Two 12" DL12BFH

12" DL12ST

12" DL12BFH

18" EVX-180B

 Two 18" EVX-180B

HF Transducer

3" DH7

3" DH7

MF: 8" MF8

HF: 3" DH7

3" DH7

3" DH7

—

—

Crossover Frequencies (slope in 

Biamp mode)

1,500 Hz 

(24 dB/octave)

1,500 Hz 

(24 dB/octave)

1,200 Hz

1,500 Hz 

(24 dB/octave)

1,200 Hz 

(24 dB/octave)

100 Hz 

(24 dB/octave)

100 Hz 

(24 dB/octave)

Nominal Impedance (Biamp mode)

8 Ω (8 Ω/8 Ω)

8 Ω (8 Ω/8 Ω)

—  (8 Ω/12 Ω)

4 Ω (4 Ω/8 Ω)

6 Ω (6 Ω/8 Ω)

8 Ω

4 Ω

Input Connections

2 Neutrik NL4

2 Neutrik NL4

2 Neutrik NL4

2 Neutrik NL4

2 Neutrik NL4

2 Neutrik NL4

2 Neutrik NL4

Dimensions (H x W at front x D)

26.6" x 15.35" x 14.6"

(675 x 390 x 372 mm)

29.9" x 17.7" x 16.02"  

(759 x 450 x 407 mm)

48.8" x 18.4" x 19.09" 

(1,240 x 467 x 485 mm)

38.98" x 15.47" x 14.77"

(990 x 393 x 375 mm)

15.5" x 39.0" x 14.9" 

(394 x 990 x 378 mm)

35.5" x 17.7" x 23.6"  

(902 x 450 x 600 mm)

39.96" x 22.05" x 23.7" 

(1,015 x 560 x 602 mm)

Net Weight 

57.3 lb (26.0 kg)

71 lb (32.0 kg)

103.6 lb (47 kg)

80 lb (36.5 kg)

84 lb (38 kg)

105 lb (47.5 kg)

150 lb (68 kg)

12" TWo-WAy FULL-RANGE LoUDSPEAkER

•  Compact with high output 
•  Ideal for mains (small-to-medium rooms) or monitors
•  Cast-frame woofer, vented cabinet for extended LF
•  3" DH7 titanium HF compression driver
•  Rotatable 75° x 50° Constant Directivity waveguide
•  Asymmetric 10° down-angled coverage

•  Externally switchable biamped or passive operation
•  High sensitivity, 131 db maximum SPL (peak)
•  Power handling: 300 W continuous, 1200 W peak
•  5-sided 13-ply birch enclosure with monitor slant
•  built-in handles and L-Track rigging
•  black or white

15" TWo-WAy FULL-RANGE LoUDSPEAkER

•  Compact with high output 
•  Ideal for mains (small-to-medium rooms) or monitors
•  Cast-frame woofer, vented cabinet for extended LF
•  3" DH7 titanium HF compression driver
•  Rotatable 75° x 50° Constant Directivity waveguide
•  Asymmetric 10° down-angled coverage

•  Externally switchable biamped or passive operation
•  High sensitivity, 130 db maximum SPL (peak)
•  Power handling: 400 W continuous, 1600 W peak
•  5-sided 13-ply birch enclosure with monitor slant
•  built-in handles and L-Track rigging
•  black or white

CoMPACT 18" SUbWooFER

•  Concert-proven high-output performance
•  Accurate transient detail
•  EVX-180b woofer for superior linear excursion
•  High sensitivity, 137 db maximum SPL (peak)
•  Power handling: 600 W continuous, 2400 W peak

•  Rectangular 13-ply birch vented enclosure
•  built-in handles and 1 3/8" pole-mount receptacle
•  Four threaded T-nuts for casters or dollies
•  black EVCoat finish

CoMPACT DUAL 18" SUbWooFER

•  High-level extended LF with concert-

proven performance

•  Accurate transient detail
•  Available in Standard and Riggable (L-Track) versions 
•  EVX-180b woofers for superior linear excursion
•  High sensitivity, 139 db maximum SPL (peak)

•  Power handling: 1200 W continuous, 4800 W peak
•  Rectangular 13-ply birch vented enclosure
•  built-in handles and sealed pocket wheels (Standard)
•  Integrated pole-mount receptacle (Standard)
•  black EVCoat finish

DUAL 12" TWo-WAy FULL-RANGE LoUDSPEAkER

•  Full-range performance with extra-full lows
•  Ideal for mains in small-to-medium rooms
•  Cast-frame woofer, vented cabinet for extended LF
•  3" DH7 titanium HF compression driver
•  Rotatable 75° x 50° Constant Directivity waveguide
•  Asymmetric 10° down-angled coverage

•  Externally switchable biamped or passive operation
•  High sensitivity, 135 db maximum SPL (peak)
•  Power handling: 600 W continuous, 2400 W peak
•  Trapezpoidal 13-ply birch enclosure
•  built-in handles and L-Track rigging
•  black or white

15" THREE-WAy FULL-RANGE LoUDSPEAkER

•  Compact with high-level, high-fidelity sound
•  Cast-frame DL15ST woofer, 

vented box for extended LF

•  Horn-loaded 8" MF8 midrange driver
•  3" DH7 titanium HF compression driver
•  Asymmetric (10° down-angled) 

75° H x 50° V coverage

•  biamped operation
•  High sensitivity, 130 db maximum SPL
•  Power handling: 400 W continuous, 1600 W peak
•  Trapezpoidal (15°/side) 13-ply birch enclosure
•  built-in handles and L-Track rigging
•  black EVCoat finish

1

 Half space

DUAL 12" TWo-WAy FULL-RANGE LoUDSPEAkER

•  Full-range performance with extra-full lows
•  Ideal for mains in small-to-medium rooms
•  Cast-frame woofer, vented cabinet for extended LF
•  3" DH7 titanium HF compression driver
•  Rotatable 75° x 50° Constant Directivity waveguide
•  Asymmetric 10° down-angled coverage

•  Externally switchable biamped or passive operation
•  High sensitivity, 133 db maximum SPL (peak)
•  Power handling: 600 W continuous, 2400 W peak
•  Trapezpoidal 13-ply birch enclosure
•  built-in handles and L-Track rigging
•  black or white