No Original Box - Local Pickup Only
8/10 Condition - Missing Calibration Microphone
The Sunfire True Subwoofer EQ is designed to give you the best possible low-frequency sound quality for your Home Theater experience. It incorporates a tremendously powerful built-in amplifier and a pair of drivers to produce tight, floor-rumbling, denture-rattling bass that you can feel as well as hear.
Standard Edition is an 11 inch cube, with an output greater than 110 dB peak SPL, 18 Hz to 100 Hz. The subwoofer has an automatic equalization system which will tailor the subwoofer output to compensate for any room effects. It also has a manual equalization mode. The subwoofer has an adjustable high cut filter and a choice of speaker-level or line-level inputs for easy incorporation into existing systems, or as part of a subwoofer/satellite speaker combination. Controls for adjusting the volume, crossover frequency and phase, allow the subwoofer to be perfectly matched to any listening environment and audio component.
The Driver
To have lots of bass requires moving lots of air. Your Sunfire Subwoofer incorporates two drivers that can move back and forth approximately five times more than a normal subwoofer. This gives it a lot of air moving capacity which allows for majestic bass performance. Two drivers share the acoustic output. Sometimes one driver appears to be moving more than the other. They both move the same amount only when operating at the limit of their excursion and power output, or when bass requirements and music requirements demand maximum output from the system. Otherwise, the power is shared between the two drivers in a way that depends on the momentary amplitude and the momentary musical spectrum. It is normal for one or the other to move more or less than its mate during operation.
The Amplifier
The large movement range of the drivers creates greater air pressure inside the box than a conventional subwoofer. Therefore, the drive amplifier must be much more powerful than an ordinary subwoofer amplifier. In fact, it has to be so powerful, it is almost hard to believe. The power amplifier within your Sunfire Subwoofer is capable of delivering over 2,700 watts into a 3.3-ohm resistor (the driver voice coil resistance). When the same full output is applied to the driver, however, the enormous back-electromotive force generated as a consequence of its large motion and giant magnet causes the current flow to be much less than if it were a 3.3-ohm resistor. It is this singular property of the driver that allows the subwoofer to be approximately ten times more efficient than a subwoofer this size would normally be. A compressor circuit kicks in automatically if the input signal level reaches a level that would overload the driver. This maintains a ceiling on the output without clipping. If the input signal is driven even further, a 'soft clipping' circuit is enabled. This allows the subwoofer to put more sound into the room to satiate the power-hungry user, but without distortion or damage to the subwoofer. Thus, for explosive scenes in movies, this produces extremely high sound pressure levels (SPL) in your room without the drivers banging against the mechanical stops.
Features:
- 2,700 watt, high efficiency amplifier
- High gloss, dark rosewood finish (also
referred to as Deep Bing Cherry Lacquer) - Automatic Room Equalization mode
- Measurement Microphone included
- Very low distortion
- Long throw, premium quality drivers
- Stunning output from a small cube!
- Automatic signal-sensing turn-on and
standby mode - 12 VDC trigger input for remote turn-on
- Balanced XLR input
- Line level unbalanced inputs
- Speaker level binding post inputs
- Line level high-pass outputs
- Continuously variable phase control
- Continuously variable crossover frequency adjustment, 35 to 100 Hz
- Continuously variable volume level
control - Soft clipping circuit allows graceful
overload and prevents speaker dam age
due to clipping - Gold-plated inputs and output
