Aspect TA-890H
Aspect Series Engineering Information
The Aspect series is a range of high performance modular loudspeaker enclosures designed for use across a wide spectrum of sound reinforcement activities, easily scaleable to specific acoustical and venue requirements ranging from large scale indoor or outdoor concerts to corporate events, theatre shows and nightclub applications.
The aim of any sound reinforcement system is to distribute sound evenly, with consistent frequency response and in a predictable way,across all seats of an auditorium or listening area. An optimum method of attaining this goal is through the correct application of point source arrays to create a segment of a spherical wavefront. Not only does this approach provide an exceptionally well defined and coherent acoustic source, but it also allows for considerable flexibility when assembling arrays in both horizontal and vertical dimensions. In practice, the dispersion characteristics of a typical sound system are less than ideal because of the tendency for conventional high frequency exponential horns to 'beam' with increasing frequency. When arraying such horns,interference between adjacent sources is inevitable due to the variable curvature of the wavefront caused by the horn`s geometry, and this results in undesirable comb filtering effects.
Turbosound engineers, through intensive research and the subsequent implementation of innovative and patented Polyhorn designs, have identified and overcome these deficiencies and implemented solutions in the Turbosound Aspect series. Fundamental to the Polyhorn designs and applied in both high-mid and high frequency bands is the principle of dividing an exponential horn flare into a multiplicity of tapered waveguides. Doing so ensures that all path lengths from the diaphragm surface to horn mouth are identical, and consequently guarantees uniformity of phase of the wavefront at the horn mouth. The Polyhorn design effectively locates the acoustic centre well behind the motor system, forming a virtual point source whose radius coincides with the array curvature without requiring an excessively deep enclosure.
The TA-890H is a portable mid-high enclosure designed for flown and ground stacked touring applications. It houses high frequency, high-mid frequency and low-mid frequency elements arranged in a vertical orientation, and covering the frequency range from 100Hz to 20kHz.
The top section of the enclosure is dedicated to handling the high frequency band above 5kHz,being reproduced by two custom-designed HF drivers loaded by a high frequency Polyhorn device. The HF driver combines highly innovative patented design features to ensure exceptional high frequency performance and long term reliability. High-mid frequencies from 450Hz to 5kHz are handled by a proprietary 10' HMF drive unit on a further Polyhorn device optimised for high-mid frequencies. Two 10' low-mid frequency drivers loaded with TurboMid devices cover the remaining frequency range from 450Hz down to 100Hz.
A key feature of the Polyhorn designs is the very sharp cut-off at the edges of the coverage pattern, which all but eliminates the comb filtering effects commonly experienced between adjacent sources when arraying conventional horn designs. This makes it possible to achieve seamless arrayability in a very intuitive and predictable fashion.
Significant improvements in the individual drivers` power handling, and a subsequent reduction in power compression, have also been achieved through the use of high stability,high temperature neodymium magnet
Features
- Total system optimisation
- Very high SPL
- Arrayable enclosure
- Integral flyware
- Rotatable mid-high section
- Optimised truck pack
- Very compact enclosures
- Seamless arrayability
Applications
- Stadiums and arenas
- Touring and festivals
- Regional concert touring
- Theatre and Corporate
- Dance clubs
Aspect TA-890L
The TA-890L is a low frequency touring enclosure housing two high efficiency 15'' drivers loaded with TurboBass devices in a portable cabinet covering the frequency range from 45Hz to 100Hz.
It is compatible with the TA-890H mid-high enclosure, and since it is fitted with both vertical and horizontal flying systems, it can be flown in clusters together with TA-890H enclosures. The flying hardware and corner mouldings also provide a locking mechanism to allow the enclosures to be safely ground stacked.Although integral to the box, the flying systems can easily be removed for safety testing.
Cabinet construction is based around pre-bent 9-ply beech plywood, this entirely eliminates two cabinet corners, reducing internal reflections as well as greatly increasing cabinet strength.
Thermal performance from the LF drivers has been greatly improved by using neodymium magnet structures which reduce power compression to negligible levels. Cabinet dimensions have been carefully chosen to allow the boxes to be optimally truck packed in the most common US and European vehicles without wasted space.
A rear panel carries two Speakon NL4MP connectors and the cabinet is fitted with ergonomically placed flush handles for easy lifting and carrying. Wheel dollies are also available to aid handling and trucking.
Features
- Double 15'' LF drivers
- Total system optimisation
- Very high SPL
- Very compact enclosure
- Integral rigging systems
Applications
- Stadiums and arenas
- Touring and festivals
- Regional concert touring
- Theatre and Corporate
- Dance clubs
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Used Turbosound
Turbosound is a leading designer and manufacturer of professional loudspeaker systems - proven by the vast number of endorsements of major international artistes and prestigious permanent installations around the world.
Evolving from a PA rental company in the late 70s, and realising that the route to providing great quality sound at large scale live music events was to design loudspeakers rather than buy someone else's, a fledgling manufacturing operation emerged with a small portfolio of ground-breaking products: the first modular full-range PA cabinets with real midrange, the TMS-3.
Turbosound's unique, award winning designs have been developed around unorthodox principles, resulting in a special harmony between high technology in its purest form and a natural approach to the art of acoustical and electronic engineering. Many principle patents have been awarded to Turbosound over the years. Turbosound can claim the distinction of having won three Queen's Awards: for Export Achievement in 1987 and 1997, and for Innovation in 2012, recognising the success of two ground-breaking design concepts - the Polyhorn and Dendritic waveguides which now form the heart of Turbosound's core product ranges.
In the large scale touring market, Turbosound has sold more than 30,000 loudspeaker systems, having led the market through the 80s and 90s with its celebrated Flashlight and Floodlight systems, and continuing to do so with the current Aspect, Flex Array and large scale Flashline loudspeaker systems, dominating this sector. Using disciplines learned from this most demanding of markets, Turbosound has also applied its design principles and patented technology to the specialist requirements of the fixed installation, theatre, worship, corporate and A/V markets.
As a result of this, you will find Turbosound products not only touring with the best known international artistes, but also permanently installed in diverse venues such as cafes, pubs, bars and restaurants; nightclubs, theatres and houses of worship; and sports centres, arenas and stadia.
Turbosound spends an industry-leading percentage of its sales on research and development, resulting in year after year of innovative product releases. State of the art measurement equipment, prototype building machinery and purpose designed sound rooms all support one of the best professional acoustical, analogue and digital engineering teams in the world.
The Turbosound range of loudspeaker products, control electronics and amplified systems has in common one single purpose - to provide you with the best solution for your application. For more detailed information about a particular product, please browse our website, or contact your local distributor - we are represented in over 70 countries.
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Active: Powered. An active crossover is electrically powered and divides the line-level signal prior to amplification. An active speaker includes an active crossover and built-in amplifier.
Actuality: Audio from an announcer speaking.
Amplifier: A component that increases the gain or level of an audio signal.
Balanced Input: A connection with three conductors: two identical signal conductors that are 180 degrees out of phase with each other, and one ground. This type of connection is very resistant to line noise.
Bandpass: A two-part filter that cuts both higher and lower frequencies around a center band. A bandpass enclosure cuts high frequencies by acoustic cancellation and low frequencies by natural physical limitations on bass response.
Bandwidth: In audio, the range of frequencies a device operates within. In video, the range of frequencies passed from the input to the output. Bandwidth can also refer to the transmission capacity of an electronic communications device or system the speed of data transfer,is very important when planning a meeting for the attendees to stay connected.
Bass: Low frequencies those below approximately 200 Hz.
Bi-Wiring: A method of connecting an amplifier or receiver to a speaker in which separate wires are run between the amp and the woofer and the amp and the tweeter.
Boost: To increase, make louder or brighter opposite of attenuate.
Bridging: Combining two channels of an amplifier to make one channel that more powerful. One channel amplifies the positive portion of an audio signal and the other channel amplifies the negative portion, which are then combined at the output.
CD: Compact Disc. Ubiquitous digital audio format. Uses 16-bit/44.1-kHz sampling rate PCM digital signal to encode roughly 74 or 80 minutes of two- channel, full-range audio onto a 5-inch disc.
CD-R: Recordable Compact Disc.
CD-RW: Rewritable Compact Disc.
Channel: In components and systems, a channel is a separate signal path. A four-channel amplifier has at least four separate inputs and four separate outputs.
Coloration: Any change in the character of sound (such as an overemphasis on certain tones) that reduces naturalness.
Crossover: A component that divides an audio signal into two or more ranges by frequency, sending, for example, low frequencies to one output and high frequencies to another. An active crossover is powered and divides the line-level audio signal prior to amplification. A passive crossover uses no external power supply and may be used either at line level or, more commonly, at speaker level to divide the signal after amplification and send the low frequencies to the woofer and the high frequencies to the tweeter.
Crossover Frequency: The frequency at which an audio signal is divided. 80 Hz is a typical subwoofer crossover point and is the recommended crossover point in theatrical and home THX systems. Frequencies below 80 Hz are sent to the subwoofer signals above 80 Hz are sent to the main speakers.
Cut: To reduce, lower opposite of boost.
Decibel (dB): A logarithmic measurement unit that describes a sound`s relative loudness, though it can also be used to describe the relative difference between two power levels. A decibel is one tenth of a Bel. In sound, decibels generally measure a scale from 0 (the threshold of hearing) to 120-140 dB (the threshold of pain). A 3dB difference equates to a doubling of power. A 10dB difference is required to double the subjective volume. A 1dB difference over a broad frequency range is noticeable to most people, while a 0.2dB difference can affect the subjective impression of a sound.
Delay: The time difference between a sonic event and its perception at the listening position (sound traveling through space is delayed according to the distance it travels). People perceive spaciousness by the delay between the arrival of direct and reflected sound (larger spaces cause longer delays.
Diaphragm: The part of a dynamic loudspeaker attached to the voice coil that produces sound. It usually has the shape of a cone or dome.
Diffusion: In audio, the scattering of sound waves, reducing the sense of localization. In video, the scattering of light waves, reducing hot spotting, as in a diffusion screen.
Digital Audio Server: Essentially a hard drive, a digital audio server stores compressed audio files (like MP3 or WMA). Most include the processing to make the files, and all have the ability to play them back.
Direct-Stream Digital: A format for encoding high-resolution audio signals. It uses a 1-bit encoder with a sampling rate of 2,822,400 samples per second (verses 44,100 for CD). Used to encode six high-resolution channels on SACD.
Dispersion: The spread of sound over a wide area.
Distortion: Any undesired change in an audio signal between input and the output.
DNR: Dynamic Noise Reduction. A signal-processing circuit that attempts to reduce the level of high-frequency noise. Unlike Dolby NR, DNR doesn't require preprocessing during recording.
Dolby B: A noise-reduction system that increases the level of high frequencies during recording and decreases them during playback.
Dolby C: An improvement on Dolby B that provides about twice as much noise reduction.
Dolby Digital: An encoding system that digitally compresses up to 5.1 discrete channels of audio (left front, center, right front, left surround, right surround, and LFE) into a single bitstream, which can be recorded onto a DVD, HDTV broadcast, or other form of digital media. When RF-modulated, it was included on some laser discs, which requires an RF-demodulator before the signal can be decoded. Five channels are full-range the .1 channel is a band-limited LFE track. A Dolby Digital processor (found in most new receivers, preamps, and some DVD players) can decode this signal back into the 5.1 separate channels. Most films since 1992`s Batman Returns have been recorded in a 5.1 digital format, though a number of films before that had 6-channel analog tracks that have been remastered into 5.1.
Dolby EX: An enhancement to Dolby Digital that adds a surround back channel to 5.1 soundtracks. The sixth channel is matrixed from the left and right surround channels. Often referred to as 6.1. Sometimes referred to as 7.1 if the system uses two surround back speakers, even though both speakers reproduce the same signal. Software is backwards-compatible with 5.1 systems, but requires an EX or 6.1 processor to obtain additional benefit.
Dolby Pro Logic: An enhancement of the Dolby Surround decoding process. Pro Logic decoders derive left, center, right, and a mono surround channel from two-channel Dolby Surround encoded material via matrix techniques.
Dolby Pro Logic II: An enhanced version of Pro Logic. Adds improved decoding for two-channel, non-encoded soundtracks and music.
Driver: A speaker without an enclosure also refers to the active element of a speaker system that creates compressions and rarefactions in the air.
DSP: Digital Signal Processing. Manipulating an audio signal digitally to create various possible effects at the output. Often refers to artificially generated surround effects derived from and applied to two-channel sources.
DTS: Digital Theater Systems. A digital sound recording format, originally developed for theatrical film soundtracks, starting with Jurassic Park. Records 5.1 discrete channels of audio onto a handful of laser discs, CDs, and DVDs. Requires a player with DTS output connected to a DTS processor.
DTS ES: An enhanced version of the 5.1 DTS system. Like Dolby's Surround EX, a sixth channel is added. In some cases (DTS ES Discrete), the sixth channel is discrete. Software is backwards-compatible with 5.1 systems, but requires an ES or 6.1 processor to obtain additional benefit. Neo: 6 is a subset of DTS ES that creates 6.1 from material with fewer original channels.
Dynamic Range: The difference between the lowest and the highest levels in audio, it&'s often expressed in decibels. In video, it's listed as the contrast ratio.
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Second hand audio gear. | Second hand lighting.
Pro audio equipment, second hand amplifiers, DJ, second hand sound systems, second hand Microphones, second hand Media Players.
Outdoor & Indoor LED screens for sale, LED mobile truck.
Light trussing, Gebrauchte Veranstaltungstechnik, used stage equipment Stage & Theatre lighting products.
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