„General Connections

Caution: Prior to connecting the SA-3 to your system, it is important that all AC power connections to associated components (receivers, amplifiers, pre-amplifiers, processors, etc.) are either unplugged or turned off. Do not plug in or connect the SA-3 to AC power until all connections have been made.

The SA-3 subwoofer amplifier is designed for use with passive subwoofers only. As it is not a full-range amplifier, it will not function satisfactorily if used to power full-range loudspeakers. Two different subwoofer connection methods are covered in this manual.

Proper wiring of the subwoofer is essential to good sound. At a minimum, 14 AWG cable is recommended for runs of 15 feet or less between the SA-3 and the subwoofer, with heavier special purpose cable used for longer runs. For specialty cable considerations, consult your local authorized NHT retailer. If you are using a single SA-3 to drive two SW3S subwoofers in parallel, it is preferable to use similar lengths of speaker cable for connections to each subwoofer.

Prepare your speaker cable by removing 1/4” to 3/8” of insulation from the ends and twisting the exposed wire strands tightly. The five- way binding posts on the subwoofer and amplifier will accept raw wire, banana plugs or spade plugs. Tighten the binding posts by hand, as pliers can strip or break them.

Be sure to wire the subwoofer “in-phase.” That is, the positive (red) terminal on the amplifier output must be connected to the corresponding positive (red) terminal on the subwoofer. Likewise with the negative (black) terminals. All speaker cables have some sort of marking along one or both conductors to help you make the correct connections.

To minimize noise pickup, segregate cables by function. Do not run low level signal cables parallel to power cables, speaker cables, or digital cables. Also, do not run speaker cables or digital cables parallel to power cords or parallel to each other. If different types of cables are placed near each other at some place in your system, separate them by the maximum practical distance and cross them at right angles where they meet.

„Low-Pass Filter (Low Pass Fc)

The SA-3 features a continuously variable LOW-PASS FILTER which is used to determine the range of frequencies that the subwoofer will reproduce. For example, a low-pass setting of 100Hz means that the subwoofer reproduces only frequencies below 100Hz. The Low-Pass Filter is variable between 35Hz (low bass) to 150Hz (upper bass), to accommodate a variety of speaker configurations.

If you are using Connection Method #1, your main speakers are reproducing the entire frequency range (including bass) and it is advantageous for the subwoofer to reproduce only those frequencies below the rated response of the main speakers. For example, if your main speakers have a rated low frequency response of 60Hz, begin with the Low-Pass Filter set at 60Hz. See the “Fine Tuning” section for further adjustment guidelines.

If you are using Connection Method #2, your main speakers are reproducing only the frequency range selected by the SA-3’s High- Pass Filter (see following section). As a starting point, set the Low-Pass Filter at about the same frequency you have set the High-Pass Filter. For example, if the High-Pass Filter sends only signals above 75Hz to your main speakers, begin with the Low-Pass Filter set at 75Hz. See the “Fine Tuning” section for further adjustment guidelines.

„High-Pass Filter (High Pass Fc): Connection Method #2 Only

The SA-3 features a 5-position selectable HIGH-PASS FILTER which is used to determine the range of frequencies that the L & R speak- ers (“satellites”) will reproduce. For example, a high-pass setting of 80Hz means that the L & R speakers receive a signal containing only frequencies above 80Hz. The five available high-pass settings are 65, 80, 100, 125 and 150Hz.

The High-Pass Filter should initially be set to a frequency above the rated low frequency limit of the L & R speakers. For example, if your speakers have a rated low frequency response of 70Hz, use the 80Hz high-pass setting. If your speakers have a rated low fre- quency response of 90Hz, use the 100Hz high-pass setting.

To select the appropriate high-pass setting for your L & R speakers, check the owner’s manual for their rated low frequency response. If you are unable to obtain this information, here are some common high-pass settings:

 

Small speaker

 

 

 

Large speaker

 

 

 

Medium speaker

 

 

100Hz to 150Hz

 

80Hz to 100Hz

 

65Hz to 80Hz

 

 

 

 

 

 

 

 

„Subwoofer Phase

The ability to adjust subwoofer phase is a great advantage for achieving smooth bass response in your system. The propagation of low frequency sound waves from the subwoofer and the speakers combined can sometimes cause peaks and dips in the frequency response at the listening position. In this case, adjusting the subwoofer phase may improve the blending and overall performance of the system.

The SA-3 features a 4-position SUBWOOFER PHASE selector which changes the phase of the subwoofer between the 0° position (nor- mal phase), 90°, 180° (reverse phase) and 270° position. The optimal phase setting will differ according to room conditions and place- ment, and the main speakers used. Experiment with phase settings by listening to a familiar CD from the listening seat, alternating

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NHT SA-3 „ General Connections, „ Low-Pass Filter Low Pass Fc, „ High-Pass Filter High Pass Fc Connection Method #2 Only
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SA-3 specifications

The NHT SA-3 is a notable entry in the world of high-performance audio speakers, recognized for its impressive design, advanced technologies, and exceptional sound quality. Targeted primarily towards audiophiles and serious music enthusiasts, the SA-3 speaker harnesses innovative engineering to deliver an unmatched listening experience.

One of the main features of the NHT SA-3 is its unique cabinet design. Constructed using high-quality materials, the cabinet is designed to minimize resonances and unwanted vibrations, ensuring that sound reproduction remains pure and undistorted. The design philosophy behind the SA-3 emphasizes clean lines and aesthetic appeal, making it a suitable addition to any home or studio setting.

Another defining characteristic of the SA-3 is its driver configuration. The speaker utilizes a sophisticated woofer and tweeter setup, which combines a robust 5.25-inch polypropylene cone woofer with a highly sensitive 1-inch silk dome tweeter. This combination allows the NHT SA-3 to produce a wide frequency range, from deep, impactful bass to crisp, clear highs, making it versatile for various music genres and audio content.

In terms of technology, the NHT SA-3 integrates advanced crossover circuits that optimize the performance of its drivers. These crossovers ensure seamless transitions between the woofer and tweeter, resulting in an accurate and coherent soundstage. Additionally, the speaker incorporates high-quality binding posts, allowing for secure connections and compatibility with a variety of amplifiers and audio equipment.

The NHT SA-3 also excels in its power handling capabilities. With a recommended amplifier power range, the speaker can comfortably handle a substantial amount of power without compromising on performance, making it suitable for both casual listening and more demanding audio applications.

Moreover, the SA-3 has been engineered for both wired and wireless connectivity, allowing it to integrate seamlessly into modern audio setups. This flexibility ensures that users can enjoy their favorite music from various sources while retaining high sound quality.

Overall, the NHT SA-3 stands out in its class for its exceptional clarity, dynamic range, and aesthetic appeal. With its combination of advanced technologies, premium materials, and thoughtful design, the NHT SA-3 is a compelling choice for anyone looking to enhance their audio experience. Whether used in a home theater or a music studio, this speaker promises to deliver performance that will satisfy even the most discerning listeners.
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