JBL STX 812M 2WAY LOUDSPEAKER 12” 800W

Features :

Compact and low-profile for minimal obstruction of audience sight-lines.

70°x 70° nominal coverage.

Bi-amplified or full-range passive operation.

Pole socket for applications requiring pole or tripod mounting.

High power handling, low distortion Vented Gap Cooling™ LF driver.

3 in. (diaphragm) neodymium magnet compression driver.

Rugged DuraFlex™ coated enclosures sized to be truck pack friendly.

14-Gauge steel grille lined with acoustically transparent cloth.



Specifications :

Frequency Range ( –10 dB) : 50 Hz-20 kHz

Frequency Response (± 3 dB) : 75 Hz-20 kHz

Coverage Pattern : 70˚ × 70˚ nominal

Sensitivity (1W/1m) : 95 dB

Power Rating
(Cont. Pink Noise/Program/Peak) : 800 W / 1600 W / 3200 W
(Continuous/Program/Peak)

Rated Maximum SPL : 130 dB SPL Peak

Nominal Impedance : 8Ω

Input Connectors : Two NL4

Operational Modes : Full Range/Bi-Amp

Dimensions (H x W x D) : 571 mm x 355 mm x 264 mm
(22.5" x 13.4" x 10.4“)

Net Weight : 19 kg ( 42 lbs)

User's Manual

Professional Sound Tools for Musicians
 
Professional Components
At the heart of the PREMIUM PR:O full-range cabinets is a new 1" driver with ultra-low-distortion
that renders a very natural-sounding image even at peak loads. The 60° x 40° horn to which this
driver is coupled ensures uniform system directivity that is sure to delight performing musicians,
sound techs, and audiences alike.

Professional Features
The new PREMIUM PR:O series? high-value interior is reflected in the exterior?s smart appearance
and modern appointments. The ergonomically shaped and positioned handles are recessed into the
enclosures, with no projecting parts or screws that could ruin auto upholstery. In addition, the full-range
models feature countersunk rigging points for fast, professional fixed installation. For added convenience,
the subwoofer is pre-fitted with threaded bushings to accept optionally available casters. The ingeniously
simple DuoTilt? pole mount gives you a choice of angles at which to aim the speakers directly at your
audience, but without the hassle and risk of wobbly tilt units.

Dynamic protection circuit for the highfrequency driver
PREMIUM PR:O Series mid/high units and monitors are equipped with special protective circuitry.
Located in the high-frequency signal path, it limits output levels whenever the 1" driver approaches
the overload threshold.

PREMIUM PR:O - PR:O 15 X
 
Description  The multi-talented prodigy in the PREMIUM PR:O family. The
Description  housing shape enables the PR:O 15 X to be used as a main
Description  PA or a monitor speaker.
Power handling capacity  RMS: 400 W
Power handling capacity  Program: 800 W
Frequency response within +/-3dB  60 Hz ? 19 kHz
Frequency response @ -10dB  53 Hz- 19 kHz
Speaker  1x 15?
Impedance  8 Ohm
HF driver  1?
Axial sensitivity 1w/1m half-space  104 dB
Maximum SPL 10% THD half-space  128 dB
Crossover frequency  2 kHz/12 db Octave
Connections  2x Speakon
Mounting collar  DuoTilt? speaker-stand mounting collar for fast, easy
Mounting collar  orientation of the speakers towards the audience
Rigging points  side-mounted M8 threaded rigging points for easy installation
Dimensions (WxHxD)  47 cm x 61,5 cm x 44,5 cm
Dimensions (WxHxD)  18 1/2? x 24 1/4? x 17 1/2?
Weight  21.6 kg
Weight  47.52 lbs

Color    Black
Input Connections    Parallel Neutrik® NL4
Speaker Type    Fullrange
Frequency Response (-3 dB)    70 - 20000 Hz
Frequency Response (-10 dB)    55 - 20000 Hz
Internal Crossover    Yes
Recommended High-Pass Frequency    60 Hz
Sensitivity 1 W/1 m    99 dB
Max. SPL/1m (calc)    132 dB
Coverage
(Nominal -6 dB) H°    90 °
Coverage
(Nominal -6 dB) V°    50 °
Rotatable Horn    No
System Power Handling (Continuous/Program/Peak)    500 Watts
LF Transducer    SMX2121
HF Transducer    DH3
Crossover Frequency    1600 Hz
Nominal Impedance (Passive)    8 Ω
Minimum Impedance    6.4 Ω
Enclosure Material    Plywood and MDF with EVCOAT
Flying    No
Height    440 mm (17.32“)
Width    364 mm (14.33“)
Depth    573 mm (22.56“)
Weight Net    19.8 kg (43.65 lbs)

Chassis Size    304.8 mm (12“)
Color    Black
Directivity Index    11.6 dB
Input Connections    2 four-pin Speakon
Speaker Type    Two-Way
Speaker Type    Wedges
Frequency Response (-3 dB)    65 - 16000 Hz
Frequency Response (-10 dB)    50 - 20000 Hz
Internal Crossover    No
Sensitivity 1 W/1 m    98 dB
Max. SPL/1m (calc)    129 dB
Coverage
(Nominal -6 dB) H°    55 °
Coverage
(Nominal -6 dB) V°    80 °
Rotatable Horn    No
LF Transducer    DL12ST
Low Frequency Power Handling (Continuous/Program/Peak)    300 Watts
High Frequency Power Handling (Continuous/Program/Peak)    75 Watts
LF Nominal Impedance    8 Ω
HF Transducer    ND6-16
HF Nominal Impedance    16 Ω
Minimum Impedance    8.2/10.5 Ω
Enclosure Material    13-ply birch plywood with Futura
Flying    No
Outdoor    No
Height    584 mm (22.99“)
Width    449 mm (17.68“)
Depth    313 mm (12.32“)
Weight Net    21.9 kg (48.28 lbs)

PRICE PER UNIT

A revolutionary formula: 2 x 7 = 77

In some set-ups it can be advisable to use a horizontally designed speaker rather than a vertical one. Until now, such monitors were only available within the SX top line.

The brand new A77X, due to its outstanding features, might become a true game changer: Equipped with the same advanced technologies as the A7X, it therefore is very similar to the two-way speaker. The A77X, however, distinguishes itself by much higher, compression-free maximum sound pressure levels and dynamics. Due to its power and radiation characteristics, it also is perfectly suited for both near- and midfield monitoring.

Driver technology

Like all models of the AX series, the A77X features the ADAM proprietary X-ART tweeter. The ʽXʼ stands for ʽeXtended frequency responseʼ and thus for one of the features of the Accelerating Ribbon Technology that has been drastically improved: the frequency response. It now extends all the way up to 50kHz. In addition, the X-ART tweeter has higher efficiency and higher maximum sound pressure levels.

The two 7” woofers are identical with that of the A7X. With their large voice coils (1.5”) and powerful amplifiers, they are capable of both very high maximum sound pressure levels as well as very deep registers. The woofers do not cover the same frequency bands: while both of them are responsible for the (sub-) bass frequencies up to about 400Hz, only one of them reproduces the midrange. This prevents interferences between the two drivers. For stereo setups the A77X is available in A and B versions in order to guarantee a precise stereo image.

Amplifiers / controls

Each driver has its own dedicated amplifier. A 50W A/B amp is responsible for the X-ART tweeter, while the bass-/midwoofers are driven by a 100W PWM amp each. The front panel includes a power switch and a control for the volume that retains the volume setting independently from the on/off switch.

The rear panel features several additional controls: a gain for the high frequencies (± 4dB) and two shelf filters for high and low frequencies.
To ensure greater compatibility, there are both XLR (balanced) and RCA (unbalanced) connectors.

Review samples:

“… a refreshing change“
"… if you liked the A7X youʼll like the A77X even more, and if the companyʼs smaller near-fields werenʼt your cup of tea, the A77X are definitely worth another listen. They are not much bigger than a two-driver cabinet design, so should slip into any installation where a near-field speaker will fit, but the extra low/ mid frequency drivers mean that the bass is more naturally extended and the mid-range clearer and more detailed. I like the A77X a lot and they make a refreshing change from the usual mid-priced near-field speakers." AUDIO MEDIA magazine / February 2012

“… wide and spacious soundstage with solid left/right imaging“
"… they are fun and easy to work with, covering all the essential functions required of high-end monitors with aplomb." MusicTech magazine / April 2012