238AC Operating Manual Genelec 1238AC Smart Active Monitor
Genelec 1238AC Operating Manual Introduction Congratulations and thank you for choosing Genelec! Since 1978, Genelec has been guided by a single idea – to make perfect active monitors that deliver neutral and accurate sound in every kind of acoustical environment. In Genelec’s quest for this ultimate goal, our unrivalled commitment to research and development has led us to continuously develop innovative driver technology, electronic circuitry, enclosure designs and more.
C L R 30 0 0- 0 100 120 LS RS Figure 2. Recommended placement and alignment of monitors in a 5-channel system (ITU-R BS.775-1) Figure 1. The location of the acoustic axis. RAM-L GLM NETWORK GLM NETWORK GLM NETWORK USB Cable gauge Max. length 2.0 mm2 (14 AWG) 30 m (100 ft) 3.3 mm2 (12 AWG) 40 m (130 ft) 5.3 mm2 (10 AWG) 60 m (200 ft) Table 1. Recommended cable thicknesses for different lengths of signal cable use only.
Minimum Clearances The ambient temperature around the amplifier must not exceed 35 degrees Celsius (95°F). When the RAM-L amplifier is mounted in a 19 in rack, the minimum free space is 1/2 U both above and below the amplifier and both sides of the amplifier fully open to enable free movement of air. Use the included rack mount front plate to ensure sufficient space above and below the amplifier.
MULTI-LAYERED WALL (WOOD, CONCRETE, BRICKS) HEAVY WOODEN WALL CONCRETE WALL SAND BAGS ABSORBING MATERIAL VIBRATION ISOLATORS f ~ 2-8 Hz VIBRATION ISOLATORS f ~ 2-8 Hz Figure 6. Flush mounting the speaker in a wall constructed of wood RAM-L Amplifier Power Button The power button in the middle of the RAM-L amplifier front panel controls several functions. A short press of the power button turns RAM-L on or off.
Button press Function Short press Power on, power off Long press Enter special mode, exit special mode Press longer than 5 seconds Special mode: one short press Mode 1: AES/EBU channel A selected, room-related calibration in use Power button light blinks once every few seconds Short press advances Mode 2: AES/EBU channel B selected, room-related calibration in use Power button light blinks twice every few seconds Short press advances Mode 3: AES/EBU channel A selected, factory calibration in u
Figure 10. Horizontal directivity characteristics of the 1238AC. Genelec Oy 1238AC (dBr) vs freq (Hz) 14 April 15 95 d B r A 90 0° 15° 85 80 75 45° 30° 70 60° 65 60 55 50 20 50 100 200 500 1k 2k 5k 20k 10k Hz Figure 12. Horizontal directivity characteristics of the 1238AC. The lower curve is the power response graph.
1238AC Operating Manual AMPLIFIER SECTION SYSTEM SPECIFICATIONS 1238AC 1238AC Bass amplifier short term output power Midrange amplifier short term output power Treble amplifier short term output power Lower cut-off frequency, –3 dB < 33 Hz Upper cut-off frequency, –3 dB > 21 kHz Free field frequency response, ± 2.
