works against each other, and the sound of the two playing together will be lacking in bass and sound “phasey.” If you suspect the sound is not right, and you cannot see any markings on the wire, try this simple test:

1.Stand halfway between the loudspeakers.

2.Play some music with the amplifier or radio set to Mono.

3.Listen to the richness of the bass and the loudness of the sound.

4.Turn off the amplifier and reverse the connections on one amplifier channel only.

5.Repeat the listening test with the same volume control setting. When the sound has a richer bass and is slightly louder, the loudspeakers are working together or “in-phase.”

ACOUSTIC FINE TUNING

Each StageFront Pro LCR loudspeaker features a variable Treble and Bass Controls. The 1870LCR and 2870LCR models also feature Boundary Gain Compensation and Pod Level controls located on the front for acoustic fi ne-tuning after placement, as shown in Figure 7. Adjust these controls as follows:

■Ensure that the Treble and Midrange controls are set to Flat (0 dB).

■If a Stagefront Pro LCR is placed in a room with highly reflective surfaces like glass or tile or the reproduced sound is too bright, set the Treble control to – 3 dB to lower the high frequency response.

■Listen to dialog being reproduced on the Stagefront Pro LCR. If you want it more pronounced, set the Midrange control to up to +3dB to enhance the mid-frequency response.

LCR

Figure 7. Treble and Midrange controls for the Pro1770LCR and Pro2770LCR

Figure 8. Treble, Midrange, Pod Level and Boundary Compensation controls for Pro1870LCR and Pro2870LCR.

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Niles Audio PRO2770LCR, PRO2870LCR, PRO1770LCR, PRO1870LCR manual Acoustic Fine Tuning
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PRO2770LCR, PRO2870LCR, PRO1870LCR, PRO1770LCR specifications

Niles Audio has long been a leader in designing high-quality audio solutions for both residential and commercial applications. Among their renowned products is the PRO series of in-wall speakers, which includes the PRO1770LCR, PRO1870LCR, PRO2870LCR, and PRO2770LCR models. These speakers are designed to deliver exceptional sound quality while seamlessly blending into the architecture of any room.

The PRO1770LCR is a versatile 3-way in-wall speaker that features a pivoting 1-inch tweeter, which allows for optimal sound dispersion and clarity. Its dual 7-inch mid-bass drivers provide a rich and full-bodied sound, enhancing both music and movie audio experiences. With a frequency response of 38Hz to 20kHz, this model ensures that users receive a wide range of sound frequencies, making it ideal for home theaters and stereo applications.

Moving to the PRO1870LCR, this model also shares the pivoting tweeter technology but upgrades to dual 8-inch woofers. This 3-way design further enhances bass response and overall sound fidelity. The PRO1870LCR is perfect for larger rooms where deep, impactful audio is desired, making it a fantastic choice for dedicated listening spaces or multi-purpose entertainment areas.

The PRO2870LCR takes audio performance up a notch with its advanced driver technology. Featuring dual 8-inch woofers and a 1-inch pivoting tweeter, the PRO2870LCR is designed for audiophiles seeking superior sound quality. Its sophisticated enclosure design reduces distortion and maximizes bass output, allowing for an immersive listening experience. This model is excellent for any application where high-performance auditory feedback is essential.

Lastly, the PRO2770LCR is optimized for those who desire seamless integration without compromising audio quality. This model showcases a sleek design and user-friendly installation features. The PRO2770LCR offers dual 7-inch woofers and a 1-inch pivoting tweeter, enhancing stereo imaging and surrounding sound fields. Its frequency response is robust, making it suitable for various applications, from background music to dynamic home theater use.

All of the speakers in the Niles Audio PRO series exhibit characteristics like improved off-axis response and superior power handling, ensuring users can enjoy their preferred media with clarity and depth. These speakers can be easily integrated with Niles’ innovative technologies such as automated volume controls and wireless compatibility, making them a perfect fit for modern smart homes. Their minimalistic design ensures that they blend seamlessly into any decor, proving that exceptional sound quality doesn't have to come at the expense of aesthetics. Whether you're building a new home theater or upgrading your existing setup, the PRO series offers high-fidelity solutions for audio enthusiasts of all levels.
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