Automatically analyzes and corrects the sound for accurate mixing.

The JBL LSR4300 Series Studio Monitors are designed for critical recording wstereo and multi-channel audio production applications that require exceptional spectral accuracy and high SPL capability. Exclusive technology from JBL automatically analyzes and corrects the response of each speaker in the room for absolute accuracy in mixing.

Acknowledging that much of today's production is carried out in acoustically untreated rooms, the LSR4300 Series is the first professional monitor to combine JBL's Linear Spatial Reference technology and automated RMCTM Room Mode Correction, an onboard system that automatically compensates for low frequency anomalies measured at the mix position.

The LSR4300 Studio Monitor enhances computer-based music production by incorporating system-wide volume control, input source selection, individual speaker solo and user EQ. Harman HiQnetTM Network protocol enables centralized system-wide control from any speaker, wireless remote control, or computer using LSR4300 Control Center Software.

438H Low Frequency Transducer

The 8" woofer utilizes a powerful, shielded neodymium lightweight magnet which can be used in close proximity to CRT-type monitors with no interference. The transducer utilizes a copper-clad polepiece that improves high frequency output by reducing voice coil inductance. A copper ribbon voice coil ensures high sensitivity, and a flux shorting ring stabilizes the magnetic field in the gap, reducing distortion. Heat sinking has been placed close to the magnetic gap in order to draw out heat as efficiently as possible. The cone is polymer coated for uniformity of response over the woofer's passband.

431G High Frequency Transducer The high frequency transducer has a treated silk diaphragm that produces uniform and smooth sound. Its flat ribbon aluminum voice coil ensures low-moving mass and enables the transducer to achieve response out to 22kHz. A lightweight neodymium magnet structure with integral heat sinking, along with Ferrofluid in the magnetic gap, enable the transducer to produce high peak output levels with minimal power compression. The magnet structure is integrally shielded, enabling the system to be used in proximity to CRT-type monitors with no interference.

Bi-amplified Power System

The LSR4328P Studio Monitor incorporates 2 high power amplifiers that provide 150 watts of power to the low frequency transducer and 70 watts of power to the high frequency transducer. A precision digital dividing network having high-order Linkwitz-Riley slope characteristics for smooth transition between transducers, results in exceptional imaging and lack of time smear. The circuitry also yields a tonal-artifact-free noise floor.

Network and Digital Features

The JBL LSR4300 Series utilizes the Harman HiQnetTM network protocol that allows centralized control of a multi-channel system from a from any speaker's front panel, wireless remote control, or computer via a standard USB connection and LSR4300 Control Center Software. The network is configured using supplied CAT5 cable and by setting a DIP switch on each speaker. Harman HiQnet also enables synchronized RMC calibration of all speakers on the network.

JBL LSR 4328P Studio Monitor Pair Features:

Key Features: Advanced LSR Linear Spatial
Reference Design provides neutral off-axis response for greater clarity at the mix position
Automated RMCTM Room Mode
Correction system with calibration microphone measures and automatically compensates for low frequency standing waves and boundary conditions
Harman HiQnetTM Network Protocol enables system-wide control of level, EQ, input selection, solo and more
Wireless remote control and LSR4300
Control Center Software enable control from the listening position
AES/EBU, S/PDIF digital inputs
Balanced analog input with selectable +4dBu / -10 dBV sensitivity
Bi-amplified design eliminates the need for external amplification
Front panel output meter with variable brightness displays signal level
Custom designed, self-shielded transducers with neodymium motor structures for exceptional transient response and superb power-handling
Integrated mounting points allow
wall mounting for greater placement options
Built-in handles facilitate optimum positioning
Low and High Frequency
Equalization with factory presets allows tailoring of response to preference, or acoustic conditions in the room

JBL LSR 4328P Studio Monitor Pair Specifications:

Frequency Response: (+/- 1.5 dB): 55Hz—20kHz
Enclosure Resonant Frequency: 52Hz
Low Frequency Extension: User controls set to default
-3 dB: 47 Hz — 22 kHz
-10 dB: 39 Hz — 32 kHz
Low-High Frequency Crossover: Digital Crossover: 2.4kHz, 8th order LR LF/4th order BW HF
Distortion, 96dB SPL,
1 m: Mid-High Frequency
(200 Hz - 20 kHz)
2nd Harmonic: <0.4%
3rd Harmonic: <0.3%
Low Frequency (<200 Hz)
2nd Harmonic: <0.8%
3rd Harmonic: <1.4%
Measured Maximum Continuous SPL : 106dB / 1m
Measured Maximum Peak SPL: 112dB / 1m
Maximum Peak SPL Per Pair: 118dB SPL / 1m
Low Frequency Model: 436H
Diameter: 159 mm (6-1/4")
Voice Coil: 1.5" (38 mm)
Magnet Type: Neodymium
Cone Type: Polymer coated paper fiber
Impedance: 8 ohms
High Frequency Model: 431G
Diameter: 25 mm (1 in) diaphragm
Voice Coil: 1" (25 mm)
Magnet Type: Neodymium, shielded with integral heat sink
Diaphragm Type: Silk Dome
Other Features: Elliptical oblate spheroidal waveguide
Impedance: 4 ohms
Amplifier:
Low Frequency Topology: Class A-B Monolithic, Balanced
Sine Wave Power Rating: 150 watts (<0.1% THD into rated impedance)
THD + N, _ Power: <0.02%
High Frequency Topology: Class A-B Monolithic
Sine Wave Power Rating: 70 watts (<0.1% THD into rated impedance)
THD + N, _ Power: <0.02%
AC Input Voltage: 115 VAC, 60 Hz (230VAC, 50 Hz — models LSR4328P/230 and
LSR4326P/230)
AC Input Connector: IEC
Self-Generated Noise Level: <13 dBA / 1m tonal artifact-free noise floor using analog input
1/8TH Power Rating: 13 watts LSR4326P
Full Power Rating (100 hrs. IEC 58 watts IEC Pink Noise LF Channel Only
pink noise, 6dB crest Factor):
Wattage Rating: AC at 1/8th power IEC Pink Noise 60 watts
Maximum Current: AC at maximum power output (audio)
120V AC line 2.2A (LSR4328P, LSR4326P)
230V AC line 1.1A (LSR4328P/230, LSR4326P/230)
Fuse Value: 5A, 250VAC, Time Lag (LSR4328P, LSR4326P)
2.5A, 250VAC, Time Lag (LSR4328P/230, LSR4326P/230)
Inputs and Outputs
Analog XLR IN: Selectable +4 dBu/-10 dBV; Input Impedance 10K.
Positive voltage applied to XLR pin 2 produces outward woofer
motion
1/4-in tip-ring-sleeve IN: Balanced or unbalanced, Selectable +4 dBu/-10 dBV; Input impedance 20K. Positive voltage applied to 1/4" tip produces
outward woofer motion
AD Converters: 96kHz, 24 Bit, 64x Over sampling
Calibrated Input Sensitivity,
Analog XLR & 1/4":
+4 dBu: 94 dB SPL / 1 m
-10 dBV: 94 dB SPL / 1 m
Digital XLR IN: AES/EBU(IEC60958)
XLR OUT: AES/EBU(IEC60958)
RCA IN: S/PDIF , (EIAJ CP1201)
RCA OUT: S/PDIF (EIAJ CP1201)
Digital Input Sample Rates: 96k Hz, 88.2 kHz, 48 kHz, 44.1 kHz, 32 kHz. Tolerance: +/- 3%
Digital Input Word Length: 24 Bit
RMC Microphone Input 1 8" tip-ring-sleeve; powered +15 Volts on tip.
(Use supplied microphone only)
Network Connection: RJ45 IN, RJ45 OUT
Network Protocol: Proprietary Harman HiQNetTM Protocol using RS485
Computer Interface: USB Type 1
Front Panel Controls: ON, SOLO, RMC, EQ ON, LF, HF, PRESET, INPUT, +/-
RMC Functions: Start, Bypass
RMC Filter Range: 73 Frequencies (1/24th octave centers) between 20Hz to 160Hz, with a variable Q from 1 (1.4 octave bandwidth) to 16
(1/11th octave bandwidth, and from 3 to 12 dB of attenuation.
LF EQ: Factory Default: 500Hz Shelf, +/- 2dB in _ dB increments.
137 corner frequencies between 19.7 Hz and 1kHz accessible
via LSR4300 Control Center Software
HF EQ: Factory Default: 2kHz Shelf , +/- 2dB in _ dB increments 104
corner frequencies between 1kHz and 20.2 kHz accessible via
LSR4300 Control Center Software
PRESET: 1-6 Factory/User plus NULL. Recall only.
STORE possible using LSR4300 Control Center Software.
INPUT Selection: Analog (XLR / 1/4")
S/PDIF A, B
AES/EBU A, B
+/- Default: System Volume Control: 0 dB to -
Secondary functions: Increment/decrement value of selected
function
Rear Panel Controls: Input sensitivity +4dBu/ -10dBV
8 SPEAKER ID DIP switches: Left, Right, Center, Left
Surround, Right Surround, Center Surround, Left Extra,
Right Extra
Additional Controls via LSR4300 DIM (-12dB at full volume), System MUTE, Preset STORE;
Control Center Software: LOAD Configuration, SAVE Configuration; Level TRIM +3 dB to — 10 db in 1/4dB increments
Front Panel Display: 31 LED Segments for dBFS and indication of settings
Front Panel Meter: -70 dBFS to 0 dBFS plus CLIP
Rear Panel Indicators: 5 LEDs indicate active input & digital stream selection
Physical Finish: Dark graphite
Handles: 2, flush mounted on sides
Mounting: 4 threaded mounting points conforming to industry standard
square pattern, 107.9 mm x 50.8 mm (4 1/4" x 2" ) center to
center
M6 metric threads. Not for Suspension! Only placement
on bracket
Low Frequency Vent: Rear ported linear dynamics aperture
Baffle Construction: Injection-molded structural ABS
Enclosure Construction: 19mm (3 4") MDF
Net Weight: 13 kg (28-1/2 lbs.)
Dimensions: (9.3"W x 15.25H" x 10.3D")