Power Meets Precision: Exploring the REL S/5 Active Subwoofer

The entire REL range is divided into three product lines. The S-Series occupies an intermediate position between the top-end Gibraltar line and the younger T-line. The new REL S / 5 takes the lead in the S series, bringing it close to the flagships of REL. Compared to the younger models of the S / 3 and S / 2 series, the newcomer has increased the speaker to 12-inch (from 10-inch for S / 3 and S / 2), and also significantly increased the power to 550 W (from 350 W for S / 3 and 250 W for S / 2).

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REL Acoustics is a British company founded in 1990 by Richard Edmund. Based in Bridged, Wales, it exclusively manufactures subwoofers.

The REL S / 5 subwoofer is made in a rather voluminous case, resembling a cube with a side of 45 cm. The case rests on triangular legs, into which spikes can be installed. The legs provide enough space between the body and the floor for the efficient operation of the passive radiator located at the bottom of the device. The front wall with the main speaker is covered with a protective mesh on a strong frame. On the sides of the body, there are probably handles for carrying the device. This is not to say that they are very convenient, but they still fulfill their function. The long-throw driver of the model uses a special alloy diffuser. It differs from its predecessors in a reduced mass and, accordingly, allows the subwoofer to react to a signal more quickly. The speaker basket is made of die-cast aluminum. A passive radiator of the same size uses a flat and very light carbon fiber diffuser.

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The crossover uses a low latency filter (about 8ms). The filter is tuned for the smoothest possible pairing with different speakers. Circuits are provided to protect the subwoofer from overload, voltage drop, and overheating. An interesting feature of the S line is the built-in wireless receiver in its own LongBow format. This format provides uncompressed audio transmission with minimal latency. However, to use a wireless connection, you will have to purchase an additional wireless transmitter. The rear panel has a line input, high-level input on Neutrik connectors, and LFE input. The manufacturer strongly recommends using the high-level and line inputs at the same time for a more accurate match with the speakers.

The subwoofer showed a pleasant, slightly softened sound. The bass is very deep and dynamic. It is tonally well-defined and quite dense. Quite neatly, the subwoofer matches the satellites. There is slight roughness in response and some uncertainty at the lowest frequencies. The attack is slightly weakened, however, this is noticeable only in some modern music, which makes very high demands on the lower register. Acoustic recordings are reproduced by the subwoofer most accurately and legibly.

REL has equipped the S5 with its proprietary technology, including its unique “High Level” input. This allows the subwoofer to connect directly to the main speakers, ensuring a more natural blend of bass frequencies with the rest of the audio spectrum. This feature enhances the overall soundstage and provides a richer listening experience. Additionally, the S5 includes an adjustable crossover and phase control, allowing users to fine-tune the subwoofer’s performance to match their specific setup.

FAQS for Active subwoofer REL S5

1. What is the driver size of the REL S5?

The REL S5 features a 12-inch long-throw driver, designed to provide deep and impactful bass performance.

2. What is the power output of the REL S5?

The REL S5 is equipped with a powerful 500-watt Class A/B amplifier, allowing it to deliver high-quality sound with excellent control.

3. What is the frequency response range of the REL S5?

The frequency response of the REL S5 extends down to 25 Hz, ensuring it can reproduce low-frequency sounds effectively.

4. How does the REL S5 connect to my audio system?

The REL S5 can connect using various methods, including High-Level inputs for integration with main speakers, as well as low-level (RCA) inputs for connecting to receivers or amplifiers.

5. Does the REL S5 support wireless connectivity?

Yes, the REL S5 can be paired with REL’s Longbow wireless transmitter, allowing for wireless connectivity and eliminating the need for cumbersome cables.

6. What features does the REL S5 offer for customization?

The REL S5 includes adjustable crossover settings and phase control, enabling users to fine-tune the subwoofer’s performance to match their specific audio setup.

7. Is the REL S5 suitable for home theater systems?

Absolutely! The REL S5 is ideal for home theater applications, providing deep bass that enhances the impact of movies and gaming, making the experience more immersive.

8. What are the dimensions and weight of the REL S5?

The REL S5 measures approximately 15.5 inches (393 mm) in height, 15.5 inches (393 mm) in width, and 17.5 inches (445 mm) in depth, and it weighs around 57 lbs (26 kg).

9. What finish options are available for the REL S5?

The REL S5 is available in a sleek black or white lacquer finish, allowing it to blend seamlessly with various room decors.

10. Does the REL S5 come with a warranty?

Yes, REL typically offers a warranty for their subwoofers, which may vary by region. It’s recommended to check with the retailer or manufacturer for specific warranty details.

Specifications

Type: Active subwoofer
Driver Size: 12-inch (300 mm) long-throw driver
Amplifier Power Output: 500 watts (Class A/B)
Frequency Response: 25 Hz – 200 Hz (-6 dB)
Low Pass Filter: Adjustable from 30 Hz to 120 Hz
Phase Control: 0° or 180°

Cabinet Design

Enclosure Type: Sealed (acoustic suspension)
Cabinet Material: High-quality MDF (medium-density fiberboard)
Finish Options: Black or white lacquer

Dimensions and Weight

Dimensions (H x W x D): 393 mm x 393 mm x 445 mm (15.5″ x 15.5″ x 17.5″)
Weight: 26 kg (57 lbs)

Connectivity

Inputs:
- High Level (speakON connector)
- Low Level (RCA) inputs
Outputs: None (single subwoofer unit)

Controls and Features

Volume Control: Adjustable for precise tuning
Crossover Control: Variable low-pass filter for seamless integration with main speakers
Automatic Power On/Off: Detects audio signal for energy efficiency
Wireless Connectivity: Compatible with REL’s Longbow wireless transmitter (sold separately)