surroundsystem | T+A Elektroakustik DD 1535 R instruction

T+A Elektroakustik DD 1535 R manual surroundsystem

The surroundsystem

Multi-channel reproduction based on surround technology does indeed open up new worlds of experience, but the technical implementation of a multi- channel surround system does involve a number of potential pitfalls. Many existing surround systems have gained a reputation for no more than moderate sound quality, especially when used in normal stereo mode.

The reason for this lies in the tiny magnitude of the sensitive analogue stereo signals. These signals are measured in the range of just a few Millivolts (thousandths of a Volt), and unwanted interference to these signals can be perceived by the human ear even when a thousand times smaller than that. Conventional surround amplifiers feature a single case in which digital signals and high-frequency video signals live in the same space as the sensitive analogue signals, and this represents an open invitation for interference between the various signals.

This compromise solution is entirely unacceptable to us at , so for our surround system we developed an arrangement in which the various signal processing sections were kept entirely apart. The system therefore comprises two specialised devices: an analogue two- channel stereo amplifier is used to process high-quality stereo signals, while the digital surround signals are processed in the surround decoder which is an independent machine.

In the  system the analogue and digital sub- assemblies are separated from each other completely, and this eliminates the danger of interference to the delicate analogue signals. The net result is that there is absolutely no danger of a loss in quality in analogue stereo reproduction.

To make it possible to integrate the surround decoder easily into an existing  system, we developed the

surround interface (TASI), which also provides the means to process and reproduce analogue signals, e. g. Dolby Surround encoded source material.

This interface is the key to integrating the decoder elegantly into the overall system. At the same time the decoder has absolutely no effect on normal stereo signals, since it is completely removed from the signal path during normal stereo operations.

Not even the length of the signal paths is changed; in stereo mode all signals remain in the pre-amplifier section of the amplifier, i. e. they are not forced to make a detour through the surround decoder.

When the system is used in Pro Logic II mode, the TASI interface also ensures that the decoder is looped in at the ideal point and at the optimum level in terms of signal processing, i. e. directly after the source selector switch.

An additional advantage of the TASI interface is that it makes it possible to exploit the superb output stages of a typical  stereo system for the front channels when in surround mode.

To ensure that the sound from the whole system is as balanced and harmonious as possible, the output stages built into the decoder are identical in circuit design to our stereo output stages. This design philosophy ensures identical frequency, phase and transient behaviour on all channels, combined with perfectly balanced dynamic characteristics.

The  surround philosophy also provides further advantages: two separate pre-amplifier circuits are present, each with its own volume and tone control functions: a stereo pre-amplifier and an independent six- channel pre-amplifier in the surround decoder.

It is therefore possible to adjust the levels and tone settings separately to meet the different requirements for stereo and surround modes. When you switch mode, the correct settings automatically take effect.

A n alogue

Stereo

STEREO

OUTPUT STAGE

ital

ProLogic

TASI

ter

Front

DECODER

MCH Out

Sub In

Sub Out

3-CHANNEL

OUTPUT STAGE

DOLBY DIGITAL EX / DTS ES VERSION

STEREO

OUTPUT STAGE

FRONT	FRONT	REAR	CENTER REAR	SUBWOOFER	BACK	BACK
LEFT	RIGHT	LEFT	RIGHT	ACTIV	LEFT	RIGHT

DD 1535 R specifications

T+A Elektroakustik DD 1535 R is a distinguished loudspeaker that represents a synthesis of advanced technology and timeless acoustic design principles. Engineered in Germany, the DD 1535 R stands out in the realm of high-fidelity audio systems, ensuring remarkable sound reproduction across various genres of music.

At the core of the DD 1535 R is its innovative drive technology. It features a hybrid driver arrangement that integrates a high-performance 15-inch woofer, delivering deep bass frequencies with clarity and authority. This is complemented by a sophisticated midrange driver, meticulously designed to reproduce vocals and musical instruments with lifelike precision. The midrange driver is encased in a specially designed enclosure that minimizes resonances, allowing for pure sound reproduction. Adding to this is the precision-engineered tweeter, which extends the frequency range and enriches the listening experience with detailed high frequencies.

The design of the DD 1535 R combines both aesthetic appeal and acoustic functionality. Its cabinet is constructed from high-quality materials that not only look elegant but also enhance sound performance by reducing unwanted vibrations. T+A employs a unique Multi-Layer Technology, where multiple layers of wood are bonded together to form a rigid cabinet, reducing resonance and distortion, thereby providing pure sound reproduction.

One of the noteworthy features of the DD 1535 R is its adaptable crossover network. This advanced circuit ensures that each driver operates within its optimal frequency range, enhancing overall sound coherence and sensitivity. The components used in the crossover are of audiophile grade, ensuring minimal signal loss and maximum fidelity.

Additionally, the DD 1535 R is designed to accommodate a variety of audio setups. With adjustable impedance settings, the speaker can be easily integrated into both traditional and modern audio systems. This versatility is further enhanced by its ability to handle high power levels without compromising sound quality, making it ideal for both home listening and professional use.

In conclusion, the T+A Elektroakustik DD 1535 R is a top-tier loudspeaker that merges scientific innovation with traditional craftsmanship. Its array of cutting-edge technologies and design principles guarantees an unparalleled listening experience, catering to audiophiles and casual listeners alike. Whether in a music studio, home theater, or a personal audio setup, the DD 1535 R is poised to deliver superb sound quality, pushing the boundaries of acoustic performance.