Genelec HT315A Owner's Manual

HT312A and HT315A
Operating Manual
Genelec HT312A and HT315AHT312A and HT315A Active Home Theater Systems
EC Declaration of Conformity
This is t o cert ify that the Genelec HT312A and H T315A Active Home Theater Systems confor m to the followi ng standards:
Safety : EN / IEC 60065: 1998 6th Editio n EMC: EN 55 020 : 2002 + A1 : 2003 EN 55 013: (2001) EN 61 000-3 -2 (2000) EN 61 000-3 -3 (1995)
The product herewith complies with the requirements of The Low Voltag e Dir ective 73/23 /EEC, EMC Direc tive 8 9/336 / EEC a nd 93/68/EEC
Signed: Ilpo Mar tikai nen Position: Managing Director Date: 3-October-2005
Genelec HT312A and HT315A Active Home Theater Systems
System
The Genelec HT312A and HT315A ar e three-way active home theater loudspeaker systems including drivers, multiple power amplifiers and active crossovers. The sys­tems are designed for room volumes up to 175 m3 / 6200 ft3 (HT312A) or 250 m3 / 8800 ft3 (HT315A) with maximum listening distances up to 6.1 - 7.6 meters (20-25 ft). They are designed to perform well both as free-standing or flush mounted into the wall structure.
The unique Directivity Control Waveguide™ (DCW™) Technology developed by Genelec provides stable and extremely accurate imag­ing and frequency balance even in difficult acoustic environments. The fast, low distor­tion amplifiers are capable of driving a stereo system to peak output levels in excess of 124 dB SPL at 2 m (HT315A) or 123 dB SPL at 2 m (HT312A) with music material. Versatile crossover controls allow for precise matching of the loudspeaker system to different acous­tic conditions.
Drivers and cabinet
construction
On the HT315A the low frequencies are reproduced by an 385 mm (15”) bass driver loa ded with a 110 liter vented box. T he
-3dB point is 33 Hz and the low frequency
response extends down to 29 Hz (-6 dB). The HT312A features a 305 mm (12”) bass driver in a 65 liter vented box with the -3 dB point at 35 Hz and -6 dB at 32 Hz.
Both models share the same midrange and high frequency driver layout with a pro­prietary 130 mm (5”) direct radiating cone for the MF and a 25 mm (1”) metal dome for the HF loaded by proprietary Directivity Con­trol Waveguide. All drivers are magnetically shielded.
Crossover filters
The active crossover network consists of three parallel bandpass filters. The crosso­ver frequencies are 410 Hz and 3.0 kHz on the HT315A and 420 Hz and 3.2 kHz on the HT312A. Bass, midrange and treble level controls with 1 dB steps are included in the crossover to obtain uniform frequency bal­ance in different acoustic conditions. The low frequency Tilt and Roll-Off controls both have four 2 dB steps to allow refined low frequency response tailoring. The crossover network is driven by an active balanced input stage, fed by a 3 pin XLR connector. Variable input sen­sitivity allows for accurate level matching to the signal source output.
Amplifiers
120 W of short term power. The HT312A has a 180 W amplifier for the low frequency driver and 120 W amplifiers each for midrange and treble drivers. The amplifiers are designed to operate at very low THD and IM distortion values and incorporate special circuitry for driver overload protection and amplifier ther­mal protection.
Installation
Each loudspeaker is supplied with an inte­grated amplifier unit, a mains cable and an operating manual. Once unpacked place the loudspeaker in its required listening position, taking note of the line of the acoustical axis (see Figure 1).
Sufficient cooling for the amplifier must be ensured. The minimum clearance for the amplifier is 10 centimeters (4”) to any object. The space adjacent to the amplifier must either be ventilated or sufficiently large to dissipate heat so that the ambient tempera­ture does not rise above 35 degrees Celsius (95°F). If the loudspeaker is flush mounted into the wall structure, the amplifier can be placed separately into an equipment rack using an optional rack mount kit (see sec­tions ‘Flush mounting’ and ‘Accessories’).
Before connecting up, ensure that the mains switch is off (see Figure 2). Check that the mains voltage selector is correctly set to your local voltage. Audio input is made via a
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