Genelec 1038-AC Brochure

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Genelec 1038AC Tri-amplified Monitoring System
Data sheet
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1038AC Tri-amplified Active Monitoring System
APPLICATIONSAPPLICATIONS
APPLICATIONS
APPLICATIONSAPPLICATIONS
Video/Film Post Production
DVD Mastering
DVD MasteringDVD Mastering Broadcast MonitoringBroadcast Monitoring
Broadcast Monitoring
Broadcast MonitoringBroadcast Monitoring Project StudiosProject Studios
Project Studios
Project StudiosProject Studios
SYSTEM The Genelec 1038AC is a dedi-
cated center channel speaker for three channel (LCR) and Surround systems. Its slim and compact cabinet has been designed for optimum placement in the limited space above, below or in verical orientation, on either side of a video monitor or screen.
As its name suggests, the Genelec 1038AC is best suited for use as a center channel speaker with a pair of standard Genelec 1038A active monitors. The 1038AC employs the same mid and treble drivers and Direc­tivity Control Waveguide as a standard 1038A and the amplifier unit is also the same to ensure complete tonal compatibility.
Genelec 1038AC is a three-way active monitoring system includ­ing magnetically shielded loudspeaker drivers, speaker enclosure, multiple power amplifi­ers and active, low signal level crossovers. Although designed for film and video post-produc­tion and medium sized control rooms this system is also ideal for project studios and broadcast monitoring. DVD mastering is also well tailored for where broad bandwidth, high SPL's and ex­tended low frequency response are essential.
ommended to be flush mounted into the control room wall, but it can also be used as a free-stand­ing monitor.
The unique Directivity Control Waveguide (DCW) Technology provides excellent stereo imaging and frequency balance even in difficult acoustic environments. The fast acting, low distortion amplifiers are capable of driving the stereo system to peak output levels in excess of 124 dB SPL at 2 m with program signals. Versa­tile crossover controls allow for precise matching of the speaker system to different acoustic conditions. The system can be used both in vertical and horizon­tal orientations by simply rotating the DCW unit.
Block diagram showing active
crossover filters, power amplifiers
and driver units.
The separate amplifier unit is built into a rack mount chassis for easy fitting into a standard 19" equipment rack. A 10 meter connecting cable set to go be­tween the amplifier and speaker is standard. The 1038AC is rec-
Three channel amplifier is housed in a rack adapter chassis
Horizontal mounting and rear view of the speaker
Vertical mounting
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The reference axis lies between midrange and tweeter drivers.
INTEGRATED CONSTRUCTION Uniform performance is obtained
through the matching of the loudspeakers and amplifiers as a complete, calibrated package.
The rugged amplifier is mounted into a rack mount chassis with vibration isolators which also act as quick release hinges making maintenance operations easy and straightforward. The speaker cabinet is constructed of ve­neered MDF which is heavily braced to eliminate structural resonances.
AMPLIFIERS The bass, midrange and treble
amplifiers each produce 400W, 120W and 120W, respectively of short term power with very low THD and IM distortion. Special attention has been paid to elec­tronic design to ensure the highest subjective sound quality currently possible. The system incorporates special overload protection circuitry for the drivers. Thermal protection is also in­cluded for the amplifiers.
DRIVERS The bass frequencies are repro-
duced by two 250 mm (10") bass drivers loaded with a 110 liters vented box. The -3dB point is 33 Hz and the low frequency re­sponse extends down to 29 Hz (-6 dB). The midrange frequen­cies are reproduced by a proprietary 130 mm (5") direct radiating cone driver loaded with a DCW. The high frequency driver is a 25 mm (1") metal dome also loaded by a DCW.
The 1038AC is magnetically shielded in order to minimise interference with video monitors.
DCW TECHNOLOGY The revolutionary Directivity
Control Waveguide Technology is a means of vastly improving the
performance of a direct radiating multiway loudspeaker in normal listening conditions.
The basic idea is to match the different drive units precisely, both in terms of frequency re­sponse and directivity. This will result in a smoother and virtually uncoloured off-axis response of the system. Also due to im­proved directivity control especially in the midrange and high frequencies, more direct sound and less early boundary reflections are received at the listening position. This gives a more accurate stereo imaging and makes the system less sensitive to differing control room acoustics than any conventional direct radiator design. The DCW Technology improves drive unit sensitivity from +2 to +6 dB thus increasing the system's maxi­mum sound pressure level.
CROSSOVER FILTERS The crossover frequencies of the
active crossover network are 410 Hz and 3.0 kHz. In order to obtain a uniform frequency bal­ance under different acoustic conditions, special calibrated controls are included in the cross­over; the Bass, Midrange and Treble level controls operate in 1 dB steps. Furthermore, the low frequency Tilt and Roll-off con­trols both have four 2 dB steps to allow refined LF response tailor­ing.
A high-pass filter is included in the LF channel to protect the woofer from subsonic signals. The crossover network is driven by an active balanced input stage. Variable input sensitivity allows for accurate level matching to the mixing console.
OptionsOptions
Options
OptionsOptions
Opt-09 Grille 1038-439
Order Code
The curve group above shows the horizontal directivity characteristics of 1038AC in its vertical configuration measured at 1 m.
The curves above left show the effect of the 'bass tilt', 'bass level' and 'bass roll-off' controls on the free field response. The curves to the right show the effect of the treble and midrange 'level' controls. Note that the free-field mid-range ripple is substantially reduced when the speaker is flush mounted as recommended.
The tweeter and the sealed midrange driver are mounted on a DCW to match their dispersion characteristics. The DCW can be rotated for horizontal mounting (see previous page).
Calibrated ‘LF, MF or HF Level’ switch. MUTE disconnects the channel for testing.
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1038AC SYSTEM SPECIFICATIONS
AMPLIFIER SECTION
CROSSOVER SECTION
Lower cut-off frequency, -3 dB: <33 Hz Upper cut-off frequency, -3 dB: >20 kHz
Free field frequency response of system: 35 Hz - 20 kHz (±2.5 dB)
Maximum short term sine wave acoustic output on axis in half space, averaged from 100 Hz to 3 kHz:
@1m >120 dB SPL @0.5m >126 dB SPL
Maximum long term RMS acoustic output in same conditions with IEC-weighted noise (limited by driver unit protection cir­cuit):
@1m >116 dB SPL @0.5m >122 dB SPL
Maximum peak acoustic output per pair @ 2m from the engineer with music material: >124 dB SPL
Self generated noise level in free field @ 1m on axis: <15 dB
(A-weighted)
Harmonic distortion at 95 dB SPL @ 1m on axis / freq: 50...100 Hz <1%
>100 Hz <0.5%
Drivers: Bass 2 x 250 mm (10") cone
Mid 130 mm (5") cone Treble 25 mm (1") metal dome
Speaker weight: 60 kg (130 lb) Amplifier weight: 14 kg (31 lb)
Speaker dimensions (horizontal mounting):
Height 350 mm (13 3/4") Width 910 mm (35 13/16") Depth 453 mm (17 7/8") *
Bass amplifier output power with an 8 Ohm load:
400 W
Midrange amplifier output power with an 8 Ohm load:
120 W
Treble amplifier output power with an 8 Ohm load:
120 W
Long term output power is limited by driver unit protection circuitry.
Slew rate : 80 V/µs
Amplifier system distortion at nominal output:
THD <0.05% SMPTE-IM <0.05% CCIF-IM <0.05% DIM 100 <0.05%
Signal to Noise ratio, referred to full output:
Bass >100 dB Midrange >100 dB Treble >100 dB
Mains voltage: 100/200V or 115/230V
Voltage operating range at 230V setting: 207 - 253V (±10%)
115V setting: 104 - 126V (±10%)
Power consumption:
Idle 60W Full output 500W
Input connector: XLR female pin1 gnd
pin2 + pin3 -
Input impedance: 10 kOhm
Input level for 100 dB SPL output @1m:
variable from +6 to -6 dBu
Input level for maximum short term output of 120 dB SPL @1m:
variable from +26 to +14 dBu
Subsonic filter below 33 Hz :
18 dB/octave
Ultrasonic filter above 25 kHz:
12 dB/octave
Crossover frequency:
Bass/Mid 410 Hz Mid/Treble 3 kHz
Crossover acoustical slopes:
24 - 32 dB/octave
Crossover level control operating range in 1 dB steps:
Bass from 0 to -6 dB Mid from 0 to -6 dB Treble from 0 to -6 dB
Bass roll-off control in 2 dB steps:
from 0 to -8 dB @ 33 Hz
Bass tilt control in 2 dB steps:
from 0 to -8 dB @ 80 Hz
The calibration position is with all tone con­trols set to 'off' and input sensitivity control to maximum.
Amplifier dimensions:
* Without connecting cable. Cable connec­tors require additional 100 mm (4") of space behind the speaker and the amplifier.
Genelec Oy, Olvitie 5 SF - 74100 IISALMI, FINLAND Phone: +358 - 17 - 83 881 Telefax:+358 - 17- 812 267 Email: genelec@genelec.com Web: www.genelec.com
Height 530 mm (20 7/8") Width 480 mm (18 7/8") Depth 113 mm (4 7/16") *
Genelec document BBA38AC1
All data subject to change without prior notice
COPYRIGHT GENELEC OY 1998
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