User manual GENELEC HT320AC

[. . . ] The high frequency driver is a 25 mm (1") metal dome also loaded by a DCWTM. The HT320AC is magnetically shielded in order to minimise interference with video monitors fed by a 3 pin XLR. Variable input sensitivity allows for accurate to the signal source output. Amplifiers The bass, midrange and treble amplifiers produce 400 W, 120 W and 120 W, respectively of short term power with very low THD and IM distortion values. The negative output impedance of the woofer amplifiers improves acoustic transients. [. . . ] TROL" dip switch on the amplifier panel to "ON". Note that the remote control function overrides the "autostart" dip switch function. Figure 3. RCA to XLR cable Autostart and remote control The HT320AC is equipped with an "Autostart" function, which automatically turns the amplifier to "standby" mode if an input signal has not been detected for approximately thirty minutes, and back to "on" mode when the signal returns. The function can be deactivated by turning the "AUTOSTART" dip switch to "OFF". A three-colour LED on the loudspeaker indicates the amplifier status: green for "on" and yellow for "standby". The amplifier mode can also be switched by a remote control unit connected to the respective inputs on the amplifier. Two pairs of connectors are provided, 1 and 2 for a 12 V DC type remote control, and 3 and 4 for an external switch or relay type control. Do not connect two remote controls to the loudspeaker at the same time. Activate the function by turning the "REMOTE CON- Setting the tone controls The acoustic response of the system may also have to be adjusted to match the acoustic environment. The adjustment is done by setting the five tone control switch groups 'Bass Tilt', 'Bass Roll-Off', 'Bass Level', 'Mid Level' and 'Treble Level' on the amplifier. The manufacturers default settings for these controls are 'All Off' to give a flat anechoic response. See Table 1 for suggested tone control settings in differing acoustic environments. Figure 8 shows the effect of the controls on the anechoic response. Always start adjustment by setting all switches to the 'OFF' position. Then set only one switch to the 'ON' position to select the response curve required. If more Setting the input sensitivity Adjustment of the input sensitivity of each loudspeaker can be made to match that of the signal source, by use of the input sen- MULTI-LAYERED WALL (WOOD, CONCRETE, BRICKS) HEAVY WOODEN WALL CONCRETE WALL SAND BAGS CONCRETE STRUCTURE ABSORBING MATERIAL VIBRATION ISOLATORS f ~ 2-8 Hz VIBRATION ISOLATORS f ~ 2-8 Hz VIBRATION ISOLATORS f ~ 2-8 Hz Figure 6: Flush mounting the loudspeaker in a wall constructed of a combination of materials. Figure 4: Flush mounting the loudspeaker in a wall constructed of wood Figure 5: Flush mounting the loudspeaker in a wall constructed of concrete than one switch is set to 'ON' (within one switch group) the attenuation value is no longer accurate. acoustical axis (See figure 1) should point directly to the listening position. The loudspeaker should be vertically aimed so that the acoustical axis of the loudspeakers meet around ear height at the reference listening position. In the horizontal plane the loudspeakers should be positioned according to the multichannel (ITU-R BS. 775-1) placement recommendation. The ceiling, side walls and especially the rear wall should be acoustically absorbent at low frequencies. The wall in which the loudspeakers are mounted should have a high acoustical mass to properly implement half space radiation at low frequencies and be angled so that the loudspeakers are correctly aimed. However, the loudspeakers should not be mounted too high as this increases the required vertical tilt of the speaker (maximum tilt angle < 20 degrees) and reduces the optimum listening area. Great care should be taken over how the loudspeaker is mounted into the wall. [. . . ] Check that the ventilation around the amplifier is not blocked. Refer to supplier for full sales and guarantee terms. HT320AC Operating Manual SYSTEM SPECIFICATIONS HT320AC Lower cut-off frequency, -3 dB Upper cut-off frequency, -3 dB Free field frequency response of system Maximum short term sine wave acoustic output on axis in half space, averaged from 100 Hz to 3 kHz Maximum long term RMS acoustic output in same conditions with IEC-weighted noise (limited by driver unit protection circuit) Maximum peak acoustic output per pair above console with music materia Self generated noise level in free field @1m on axis Harmonic distortion at 95 dB SPL at 1m on axis: Drivers Bass Midrange Treble All drivers are magnetically shielded Weight Speaker cabinet Amplifier Speaker cabinet dimensions Height Width Depth Amplifier dimensions Height Width Depth <33 Hz >20 kHz 35 Hz - 20 kHz (±2. 5 dB) @1m >120 dB SPL AMPLIFIER SECTION HT320AC Bass amplifier short term output power Midrange amplifier short term output power Treble amplifier short term output power 2 x 200 W (4 Ohm load) 120 W (8 Ohm load) 120 W (8 Ohm load) Long term output power is limited by driver unit protection circuitry. Slew rate 80V/µs @1m >116 dB SPL @ 2m >124 dB <15 dB (A weighted) freq. >100 Hz <0. 5% 2 x 250 mm (10") cone 130 mm (5") cone 25 mm (1") metal dome Amplifier system distortion at nominal output THD SMPTE-IM CCIF-IM DIM 100 Signal to Noise ratio, referred to full output Bass Midrange Treble Mains voltage Voltage operating range Power consumption Idle Full output <0. 05% <0. 05% <0. 05% <0. 05% >100 dB >100 dB >100 dB 100/200V or 115/230V nominal ±10% 60 W 500 W 60 kg (130 lb) 14 kg (31 lb) 350 mm (13 3/4") 950 mm (37 3/8") 453 mm (17 7/8")* 530 mm (20 7/8") (12 U) 480 mm (8 7/8") 113 mm (4 7/16")* CROSSOVER SECTION HT320AC Input connector XLR female pin 1 gnd pin 2 + pin 3 10 kOhm variable from +6 to -6 dBu variable from +26 to +14 dBu for 120 dB SPL @1m 18 dB/octave below 33 Hz 12 dB/octave above 25 kHz 410 Hz 3 kHz 24 - 32 dB/octave Input impedance Input level for 100 dB SPL output @1m *Without connecting cables. [. . . ]