Electro-Voice QRx-153/75 User Manual

QRx-153/75
15-Inch Three-Way Biamped
Speaker System with
Horn-Loaded Midrange
Technical Specifications:
General Description:
The QRx153/75 is a biamped three-way full-range
loudspeaker system capable of filling performance
spaces with beautifully balanced audio and high
acoustic output capability.
The QRx153 is designed to be bi-amplified at 500
Hz utilizing a DX38 digital controller, or a P1202
power amplifier with M153 control module. All QRx
models use 13 ply plywood, Futura coating, and steel
grilles for wear and weather resistance. The
QRx153 is trapezoidal with 15
o
side angles. “L” track
rigging is installed on the enclosure top and bottom.
Small arrays can be flown for live work, or the
system can be suspended horizontally or vertically
for fixed installations.
Thanks to its combination of the DL15ST woofer
and large enclosure volume; the horn-loaded 8-inch
midrange driver and powerful 3-inch compression
driver, the EV QRx153/75 has extended response
for high-level, high fidelity applications without the
need of a subwoofer. The horn-loaded midrange
driver provides excellent pattern control in this critical
response area. Both MF and HF horns are aimed
downward 10
o
to provide optimal aiming when the
speaker is elevated above the audience. This also
helps control sound to provide greater intelligibility.
The QRx153/75 has an excellent combination of
performance and flexibility for demanding audiences.
Key Features:
• 8-inch MF horn loaded for 75
o
x 50
o
pattern
control to 500 Hz.
• 3-inch DH7 HF compression driver.
• 15-inch DL15 woofer is loaded into vented
enclosure.
• Asymmetric MF and HF horns have
+15
o
/ -35
o
coverage.
• RMD
TM
– Ring-Mode Decoupling for vocals
and mids with superb fidelity at any listen-
ing level.
• The EV P1202 Precision Series Amplifier
and M153 module are designed to power
the QRx153 perfectly.
• L-track rigging is installed on top and
bottom of the enclosure.
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EIA-RS426A

Electro-Voice QRx-153/75 Specifications

General

Coverage (Nominal -6 dB) H°	75°
Coverage (Nominal -6 dB) V°	50°
Nominal Impedance (Passive)	8 Ω
Internal Crossover	Yes
LF Transducer	15 in (38 cm) woofer
Minimum Impedance	6.0 Ω
Enclosure Material	Plywood
Connectors	Speakon

Summary

Key Features of the QRx153/75

8-inch MF Horn Loaded

Features an 8-inch MF horn with 75°x50° pattern control down to 500 Hz.

3-inch DH7 HF Driver

Incorporates a 3-inch DH7 high-frequency compression driver for clear sound.

15-inch DL15 Woofer

Equipped with a 15-inch DL15 woofer loaded into a vented enclosure for bass response.

Asymmetric Horn Coverage

Features asymmetric MF and HF horns with +15°/-35° coverage for targeted sound dispersion.

RMD Ring-Mode Decoupling

Utilizes RMD™ Ring-Mode Decoupling for enhanced vocal and mid-range fidelity.

Amplifier and Module Compatibility

Designed to be powered by EV P1202 amplifier and M153 module for optimal performance.

L-Track Rigging System

Includes L-track rigging on top and bottom for versatile suspension and flying options.

General Description of QRx153/75

Technical Specifications

Frequency Range (-10 dB)

Specifies the frequency range response within a -10 dB tolerance.

Frequency Response (-3 dB)

Details the frequency response within a -3 dB tolerance for accurate audio reproduction.

Long Term Power Handling

Indicates the continuous power handling capability for sustained operation.

Short Term Power Handling

Defines the peak power handling capacity for transient audio signals.

Sensitivity (1W/1m)

Measures sound pressure level output for 1 watt of power at 1 meter.

Impedance

Specifies the electrical impedance for proper amplifier matching.

Maximum Calculated SPL

Provides the maximum calculated sound pressure level output at 1 meter.

Horizontal Coverage

Defines the horizontal beamwidth of the sound dispersion pattern.

Vertical Coverage

Defines the vertical beamwidth of the sound dispersion pattern.

LF to MF Crossover Frequency

Specifies the frequency where the low-frequency driver transitions to the mid-frequency driver.

Passive Crossover Frequency

Indicates the frequency for the passive crossover network.

LF Transducer

Identifies the specific low-frequency driver used in the system.

MF/HF Transducers

Details the mid-frequency and high-frequency drivers employed.

Enclosure Specifications

Describes the enclosure type, material, and construction details.

Suspension System

Details the suspension points and hardware for mounting the speaker.

Connectors Used

Lists the types of input/output connectors utilized on the unit.

Q and DI Specifications

Provides data on directivity factor (Q) and directivity index (DI).

Recommended Controller

Suggests the appropriate digital controller for optimal system performance.

Grille Material

Specifies the material and finish of the protective grille.

Dimensions (Imperial)

Provides the physical dimensions of the speaker system in inches.

Dimensions (Metric)

Provides the physical dimensions of the speaker system in millimeters.

Net Weight

States the unboxed weight of the loudspeaker system.

Shipping Weight

Indicates the weight of the loudspeaker system when packaged for transport.

System Diagrams and Graphs

Block Diagram

Illustrates the internal signal flow and component connections of the speaker system.

Frequency Response Graph

Displays the speaker's frequency response, impedance, and HF/MB impedance curves.

Beamwidth Graph

Shows the horizontal and vertical beamwidth characteristics across frequencies.

Directivity Graph

Presents the directivity index (DI) and directivity factor (Q) over frequency.

Dimension Drawings

Provides visual representations of the speaker's physical dimensions from different views.

Performance Match Recommendations

Lists compatible amplifiers, controllers, and subwoofer systems for optimal performance.