This Auditorium Sound System comes with two SD4 Ceiling Speaker Arrrays. The SD Speaker employs (4 smaller 6.5") very fast transient response aluminum-woofer drivers that are very powerful and stable. Working in unison these drivers produce clean powerful dynamic sound. When designing the SD the goal was to have the single most import feature at the forefront, good transient response ("dynamic contrast"). A transient is a sound of short duration, and good transient response can only be achieved if the speaker can deliver its output quickly and cleanly without smearing the original sound, and be completely soundless immediately after. Transients contain the essentials of sound reproduction they provide the sharp pop from a snare drum, the cutting edge of digital sound, the dynamics of the human voice. Larger 2-way cabinet loudspeaker systems offer relatively slow transient response, and the small high-frequency horn tends to beam a narrow, blaring sound at the listener—end result, muddy sound. By replacing larger speakers with four 6 or 8" drivers we increased the driver surface area while creating more punch and a tight, more focused low-end.

The QSC AD-C81Tw is part of the AcousticDesign Series of installation loudspeaker products from QSC. The AD-C81Tw ceiling mount subwoofer system is designed to supplement audio systems with low-frequency extension, the new AD-C81Tw is acoustically matched to the entire AD Series. Rated for 100 watts continuous power handling and able to take up to 400 watt peaks, the AD-C81Tw is a great compliment to any of the ceiling mount or surface mount speaker.

The new ROLLS RM64 Four Zone Mixer combines two paging microphones with up to four line level source inputs. Each input is switch selected to output to any combination of four zone outputs. The outputs are all balanced XLR connectors, and a 1/4" Remote Volume jack provides each zone with the means for external volume control.

The QSC ISA500Ti is part of the ISA Installed System Amplifiers are designed to meet the needs of sound system designers
and contractors worldwide. Three models feature isolated 25, 70, and 100 volt outputs for distributed sound systems, while four low impedance models are rated for 2 ohm operation. The ISA 1350 drives 70 volt lines directly with 1500 watts per channel. Versatile loading options and a comprehensive set of features make the ISA Series a rugged, cost-effective power solution for any permanently installed sound system.

Pure Resonance SD4 Ceiling Speaker Arrays:

• Omni Directional Speaker Coverage 360 x 180
• Infinite-baffle in-ceiling speaker’s drops into standard ceiling tile openings
• Powerful – 160 Watts at 8 Ohms, 64 Watts at 70 Volts
• 4 - 6.5" High compliance aluminum woofers with ported bass response and high frequency dome tweeters
• Uniquely designed fire retardant ABS housing may be painted to match any décor
• Impedance: 8 ohms nominal with built-in 70 Volts (4, 8, 16, 32, 64 watt taps), easily adjustable by rotating switch
• Metal Backbox that is acoustically engineered and sealed for maximum sonic performance. Safety cable kit included
  
  

QSC AD-C81Tw Ceiling Mount Subwoofers:

• 8" polypropylene cone woofer
• Large port area for extended low-frequency performance
• Defeatable passive 120 Hz low-pass filter with impedance compensation
• 100 watts continuous power handling, 400 watts peak
• 70/100 V multitap transformer with 8 ohm bypass
• C-ring and tile rails included
• Side cable entry
  
  

Rolls RM64 Mixer:

• Two Mic Inputs with Trim Controls
• Four RCA source inputs
• Four Balanced XLR Zone Outputs
• Automatic paging
• Remote Volume for each output
  
  

QSC ISA500Ti Amplifier:

• Low-impedance outputs plus isolated 25, 70, and 100 volt outputs for distributed audio systems
• Rear panel gain controls for tamper resistance; 2-dB detents allow for quick and repeatable settings.
• XLR and detachable Euro-style input connectors
• DataPort V2 for use with DPV2-compatible signal processing accessories (XC-3, SF-3, LF-3) and DSP-3/DSP-4 (with external power supply)
• Independent defeatable clip limiters for reduced distortion
• Selectable high-pass filters (50 Hz or 75 Hz) protect speakers and prevent speaker transformer saturation, with minimal effect on program material
• Front panel indicators include power, signal, and clip
• Covered barrier strip output connectors for safety agency compliance
• Automatic on-demand variable-speed fan: quiet normal operation, with maximum cooling when needed
• Rear-to-front air flow helps keep equipment racks cool
• Stereo, bridge, or parallel operating modes
• Comprehensive protection circuitry including DC, infrasonic, thermal overload, and short circuit protection
• 3-year warranty plus optional 3-year extended service contract

• (2) Pure Resonance Audio SD4 Ceiling Speaker Arrays
• (2) QSC AD-C81Tw Ceiling Mount Subwoofers
• (1) Rolls RM64 Mixer
• (1) QSC ISA500Ti Amplifier