„The SA-3 and Biamplification

All NHT tower loudspeakers are designed with dual sets of binding posts to allow for biamplification. Biamplification is the use of two sep- arate amplifiers, one to power the low frequency (subwoofer) drivers and one to power the upper frequency (midrange / tweeter) drivers.

The advantages of biamplification include reduced distortion, increased dynamic range and power output. Since both amplifiers are spared the task of reproducing the entire frequency range, both are able to concentrate all their headroom toward a specific frequency range. In the event that the speakers are driven to elevated listening levels, the subwoofer amplifier may clip first, but this distortion will be isolated from the upper frequency ranges because they are amplified separately.

Biamplifying tower speakers with the SA-3 results in added benefits, as it transforms their built-in subwoofer sections into fully adjustable powered subwoofers. Using the SA-3’s onboard bass tuning functions, the user can fine-tune a tower loudspeaker’s bass response in a specific listening environment. For example, if the speakers are used in a room that tends to under-emphasize or over-emphasize low frequencies, it is possible to increase or decrease the volume level of the subwoofer sections independently of the upper driver sections. Additionally, the SA-3’s low-pass crossover allows the user to adjust the rolloff of low frequencies to the subwoofer sections of the speak- ers, for further fine-tuning of low- to mid-bass frequencies.

Towers may be biamplified monaurally using a single SA-3 and a full-range main (stereo) amplifier, or biamplified in stereo using two SA-3’s and a main amplifier. Additionally, the towers may be biamplified either in series or in parallel. Wired in series (Method #1), the main amplifier receives a filtered line-level signal via the high-pass output from the SA-3. Wired in parallel (Method #2), both the main amplifier and the SA-3 receive full-range signals directly from the preamplifier. The main amplifier may be a stand-alone stereo unit, dual monoblocks, or the amplifier section of an integrated amplifier or A/V receiver that features “Pre-Out” and “Main-In” jacks. The SA- 3 may be used to successfully biamplify NHT Models 2.9, 3.3 and VT-2.

„Recommended biamplification settings:

1)SUBWOOFER PHASE: 0°. If the main amplifier inverts phase, use 180°. If you are unsure about this, select the setting that results in higher bass output with the volume control unchanged.

2)SUBWOOFER VOLUME: Adjust for accuracy, listening for seamless blending between upper and lower frequency ranges. When changing electronics, it may become necessary to re-adjust the SA-3’s volume level, since the correct volume setting depends on the sensitivity of partnering electronics.

3)HIGH PASS FC: 65Hz. THIS SETTING ONLY APPLIES TO BIAMPLIFICATION CONNECTION METHOD #1. IF YOU ARE USING METHOD #2, IGNORE THIS SETTING. Set the SA-3’shigh-pass filter to its lowest setting to ensure that the SA-3’shigh-pass filter does not interfere with the tower speaker’s passive crossover. In other words, the SA-3 sends only information from 65Hz-up to the main amplifier (and consequently the speaker’s upper range drivers). The speaker itself then filters the signal further, according to the high-pass filter designed into its passive crossover.

4)LOW PASS FC: 150Hz. Set the SA-3’s low-pass filter to its highest setting so that the SA-3’s low-pass filter does not interfere with the tower speaker’s passive crossover. In other words, the SA-3 sends only information below 150Hz to the speaker’s subwoofer sec- tion. The speaker itself then filters the signal further, according to the low-pass filter designed into its passive crossover.

„Biamplification: Bass Tuning Methods

Following are two bass tuning methods that can be employed to further “dial in” a tower speaker’s bass response, using the SA-3’s onboard low-pass filter.

1)If there is excessive mid-bass, lower the SA-3’s low-pass setting (LOW PASS Fc) until the mid-bass response is smoothed out. Lowering the SA-3’s low-pass setting allows gradually increased filtering of the bass information before the signal reaches the speak- er’s passive crossover network.

2)If there is not enough low bass output, lower the SA-3’s low-pass setting and increase its volume. This bass tuning method allows the listener to decrease the mid-bass response, but in conjunction with increased output from the subwoofer amplifier. This effectively increases the audibility of low bass information.

3)Experiment with phase.

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NHT „ The SA-3 and Biamplification, „ Recommended biamplification settings, „ Biamplification Bass Tuning Methods

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.