JBL MR905 Technical Manual
JBL Incorporated, 8500 Balboa Boulevard, P.O. Box 2200, Northridge, California 91329 U.S.A.
SPECIFICATIONS
ACOUSTIC & ELECTRICAL SPECIFICATIONS:
- Nominal Impedance: 8 ohm
- Power Capacity: Continuous Pink Noise: 350W, Peak Pink Noise: 1000W
- Frequency Range: 55 Hz to 17 kHz (-10dB)
- Sensitivity: 101 dB SPL*
- Crossover Frequency: 1.5 kHz
- DC Resistance: 4.25 ohm ±10% Aluminum Wire
*1 Watt (2.83 V RMS) @ 1 Meter
SYSTEM COMPONENTS:
Cabinet: CMR905 (330582-001)
Grille: 380mm (15 in.) Cone
Low Frequency Transducer: Transducer 2032H (318219-001X)
SYSTEM COMPONENTS: (cont'd)
High Frequency Transducer: 25mm (1 in.) Pure Titanium Compression Driver 2418H
DC Resistance: 3.2 ohm ±8% Aluminum Wire (330600-001)
Crossover Network: (330600-001)
AURAL SWEEP TEST SPECIFICATIONS:
- A. System Aural Sweep Test: 7.0V Input, 20 Hz to 20 kHz
- B. L.F. Aural Sweep Test: 7.0V Input, 20 Hz to 1.2 kHz
- C. H.F. Aural Sweep Test: 2.83V Input, 550 Hz to 20 kHz
PHYSICAL SPECIFICATIONS:
- Enclosure Dimensions: 508mm x 667mm x 432mm D (20.0 x 26.25 x 17.0 in. D)
- Shipping Weight: 74 lbs. (33.7 kg.)
WARRANTY INFORMATION:
- Refer to Warranty Statement packed with each product.
PACKAGE
Warranty: 59660
Specification Sheet: 980-00016-00
Under Pad
Carton: MR905 73671
Filler (2): 73676
Microfoam (8): 49790P
WIRING DIAGRAM
SCHEMATIC NMR905 (330600-001)
Speaker, High Freq 2418H (315436-001X) Diaph Repl D8R2418
Speaker, Low Freq 2032H (318219-001X) Cone Repl C8R2032
Network (330600-001)
NEUTRIK CONNECTOR NL4MPR
1/4" JACK SK3 2 EACH
Input Terminals 323892-001
Diagram Description: The wiring diagram shows the connections for the high frequency (HF) and low frequency (LF) drivers to the crossover network and input terminals. The network consists of inductors (L1, L2), capacitors (C1, C2, C3A, C3B, C4), and resistors (R1, R2). Input is via a Neutrik connector and 1/4" jacks. Terminal designations are +1, -1, +2, -2, and NC (No Connection). A note indicates that individual parts for the crossover are not available and a complete replacement assembly should be ordered.
Symbol Key:
- RED wire: Positive connection
- BLK wire: Negative connection
- YEL wire: High Frequency positive
- YEL/BLK wire: High Frequency negative
- GRN wire: Low Frequency positive
- GRN/BLK wire: Low Frequency negative
- (+) symbol: Denotes outward cone movement with positive voltage to RED input terminal.
COMPONENT EXPLODED VIEW
Diagram Description: The exploded view diagram illustrates the assembly of the JBL MR905 loudspeaker. It shows all individual components with their corresponding part numbers and quantities. Key components include the horn, high and low frequency speakers, crossover network, cabinet, grille, input terminals, handles, and various screws, gaskets, and protectors.
Component List:
- Horn: 2373 (126-00011-00)
- Gasket: 73768
- Screw (6): 804-31110-20
- Logo: 950-00011-00
- Grille: 330582-001
- Screw (4): 863-11210-32
- Washer, Finish (4): 22422
- Gasket (4): 74532
- T-Nut (14): 61861
- Foam Pad (2): 382-00025-00
- Stand Off (4): 68639-04
- Gasket: 63285
- Speaker, High Freq 2418H (315436-001X) Diaph Repl D8R2418
- Corner Protector (6): 73393-011
- Screw (32): 75401
- Corner Protector (2): 73423-011
- Screw (Ref): 803-01010-12
- Screw (12): 75401
- Label (2): 73432
- Handle Front (2): 923-00020-00
- Handle Back (2): 923-00021-00
- Cabinet CMR905: 73450 (Not For Sale)
- Logo (2) (On Back): 68594
- Corner Protector 30°(2): 73364-011
- Screw (8): 803-01010-12
- Network (330600-001)
- Input Terminals: 323892-001
- Speaker, Low Freq 2032H (318219-001X) Cone Repl C8R2032
- Dust Dome: 71646
- Screw (8): 804-01110-16
- Screw (6): 803-01010-12
