Electro-Voice Sb122 12" 400W Passive Subwoofer User Manual

1. Prodotto finitoview

The Electro-Voice® Sb122 bass module is a compact, lightweight subwoofer system designed to enhance the bass response of EV Sx and Zx Series speaker systems. It features a long-throw 12" woofer housed within a strong, lightweight composite enclosure. A large vent minimizes compression and turbulence, contributing to increased low-frequency output.

The EVS12SB cast frame transducer, specifically developed for the Sb122, utilizes the same motor and suspension design as the EVS18S found in larger EV systems, offering nearly two inches of peak-to-peak excursion capability. This design provides the performance of a larger subwoofer in a 12-inch form factor.

An integral low-pass filter enables direct parallel connection with a full-range speaker, delivering impressive low-end output without requiring an additional amplifier or processor. The filter is transparent below 160Hz, allowing the Sb122 to function as an independent subwoofer in bi-amp configurations without disabling the internal filter. For optimal output in bi-amp setups and protection of the full-range system when running in parallel, a 40Hz Hi-pass (subsonic) filter is recommended.

The Sb122 also includes a convenient pole mount socket on top of the enclosure, facilitating the mounting of a small full-range speaker like the Zx1 or Sx80 using the optional ASP-1 accessory pole, creating a compact yet powerful system.

Caratteristiche principali:

• Compact and lightweight subwoofer system for bass enhancement.
• Features a long-throw 12" woofer with a durable composite enclosure.
• Large vent design for reduced compression and improved low-frequency output.
• EVS12SB transducer with significant peak-to-peak excursion.
• Integral low-pass filter for direct parallel connection with full-range speakers.
• Pole mount socket for easy integration with other speakers.

Figura 1: Angolato anteriore view of the Electro-Voice Sb122 Passive Subwoofer, showcasing its durable black composite enclosure and metal grille.

Figura 2: Posteriore view of the Electro-Voice Sb122 Passive Subwoofer, highlighting the integrated pole mount socket and connection panel.

Understanding Automatic Saturation Compensation (ASC):

The Electro-Voice Sb122 incorporates Automatic Saturation Compensation (ASC), a patented technology designed to deliver outstanding audio performance from transformer-isolated loudspeaker systems. This feature is crucial for maintaining sound quality and protecting your amplifier, especially in 70V/100V audio systems.

When the drive signal to a transformer-isolated loudspeaker increases, the transformer's core can begin to saturate, particularly at low frequencies. This saturation can cause the load impedance to drop significantly, potentially leading to amplifier shutdown or failure. In systems with multiple loudspeakers connected in parallel, this risk is even greater.

Traditional solutions involve using a fixed high-pass filter (e.g., 50Hz or higher) across the entire system to reduce low-frequency energy and prevent saturation. However, higher cutoff frequencies can result in less bass and a less warm sound.

Electro-Voice's ASC takes a different approach by automatically inserting a high-pass filter with a variabile cutoff frequency within each loudspeaker. The ASC circuit senses the low-frequency current and dynamically adjusts the internal high-pass filter to prevent transformer saturation, ensuring a rich low-end response while keeping your amplifier operating within a safe impedance range. ASC is a standard feature across all EVC models and is optimized to work seamlessly with the high-quality TK-150 audio transformer, ensuring full, rich sound regardless of the number of loudspeakers connected in parallel.

2. Impostazione

Proper setup is essential for optimal performance and longevity of your Electro-Voice Sb122 subwoofer. Please follow these guidelines carefully:

2.1 Disimballaggio e ispezione:

• Estrarre con attenzione il subwoofer dalla confezione.
• Inspect the unit for any signs of physical damage that may have occurred during shipping. If damage is found, contact your dealer immediately.
• Conservare l'imballaggio originale per eventuali trasporti o immagazzinamenti futuri.

2.2 Posizionamento:

• Position the subwoofer on a stable, flat surface. Ensure adequate ventilation around the unit.
• For optimal bass response, consider placing the subwoofer in a corner or near a wall, which can acoustically reinforce low frequencies.
• If using the integrated pole mount socket, ensure the accessory pole (e.g., ASP-1, sold separately) is securely seated and the mounted full-range speaker is stable.

2.3 connessioni:

The Sb122 is a passive subwoofer and requires an external amplifier. Use high-quality Speakon NL4 cables for all connections.

1. AmpSelezione lificatore: Assicurati che amplifier is capable of delivering sufficient power (up to 400W) at the appropriate impedance for the Sb122. Consult the amplifier's manual for impedance matching.
2. Connessione a Amplificatore: Connect the Speakon output from your amplifier to the Speakon input on the Sb122.
3. Collegamento parallelo (facoltativo): If connecting the Sb122 in parallel with a full-range speaker, ensure the full-range speaker also has an integral low-pass filter or that your amplifier/processor is configured to handle the combined load safely. The Sb122's internal low-pass filter allows for direct parallel connection without an additional processor for the subwoofer.
4. System High-Pass Filter: For maximum output and protection, especially in bi-amp applications, it is recommended to use a 40Hz high-pass (subsonic) filter on your amplifier or audio processor. This prevents extremely low frequencies that can cause excessive cone excursion and potential damage.

Always ensure all connections are secure before powering on your audio system.

3. Istruzioni per l'uso

The Electro-Voice Sb122 is designed for straightforward operation once properly installed. Understanding its features will help you achieve optimal sound.

3.1 Accensione/Spegnimento:

• Accendi sempre il tuo amppiù vivace Dopo all connections to the Sb122 are made and secure.
• When powering down, turn off the amplifier first, then any other connected audio equipment.

3.2 Volume and Gain Settings:

• Inizia con il amplifier's volume or gain set to its minimum level.
• Aumentare gradualmente la amplifier's output until the desired volume is achieved. Avoid pushing the amplifier into clipping or distortion, as this can damage the subwoofer.
• Monitor for any signs of distortion from the subwoofer. If distortion occurs, reduce the ampl'output di lifier.

3.3 Utilizing the Internal Low-Pass Filter:

The Sb122 features an integral low-pass filter that is transparent below 160Hz. This allows for flexible integration into various audio setups:

• Full-Range Parallel Connection: For simple setups, you can connect the Sb122 directly in parallel with a full-range speaker. The internal filter will manage the low-frequency distribution to the subwoofer.
• bi-Amp Applicazioni: In more advanced bi-amp setups, the Sb122 can be used as an independent subwoofer. The internal filter does not need to be disabled. For optimal performance and protection, apply a 40Hz high-pass (subsonic) filter on your external audio processor or amplifier's DSP to the subwoofer's signal path.

3.4 Automatic Saturation Compensation (ASC) in Operation:

The integrated ASC technology in the Sb122 works automatically to protect the transformer and maintain sound quality. You do not need to configure or adjust ASC. It continuously monitors the low-frequency current and dynamically adjusts the internal high-pass filter to prevent transformer saturation, ensuring a rich low-end response while keeping your amplifier operating within a safe impedance range.

4. Manutenzione

Regular maintenance helps ensure the longevity and optimal performance of your Electro-Voice Sb122 subwoofer.

4.1 Pulizia:

• Use a soft, dry cloth to wipe down the exterior of the subwoofer.
• Per lo sporco ostinato, una leggera damp è possibile utilizzare un panno imbevuto di sapone neutro, seguito da un panno asciutto.
• Non utilizzare detergenti abrasivi, solventi o prodotti chimici aggressivi, poiché potrebbero danneggiare la finitura.
• Keep the grille free of dust and debris to ensure proper airflow and sound quality. A soft brush or vacuum cleaner with a brush attachment can be used.

4.2 Conservazione:

• If storing the subwoofer for an extended period, place it back in its original packaging or a protective cover.
• Conservare in un luogo fresco e asciutto, lontano dalla luce solare diretta, da temperature estreme e da elevata umidità.

4.3 Ispezione generale:

• Controllare periodicamente tutti i collegamenti dei cavi per verificarne la tenuta e l'usura.
• Inspect the enclosure for any cracks or damage.
• Ensure the pole mount socket is clear of obstructions and in good condition if used.

5. Risoluzione Dei Problemi

If you encounter issues with your Electro-Voice Sb122 subwoofer, refer to the following common problems and solutions before contacting support.

5.1 No Sound from Subwoofer:

• Controllare le connessioni: Ensure all Speakon cables are securely connected to both the amplifier e il subwoofer.
• Amplificatore Potenza: Verificare che il amplifier is powered on and functioning correctly. Check its power indicator lights.
• Segnale sorgente: Confirm that an audio source is playing and sending a signal to the amplifier. Check source device volume.
• Amplifier Uscita: Assicurare il amplifier's volume or gain is turned up sufficiently.
• System High-Pass Filter: If an external high-pass filter is set too high, it might be blocking all low frequencies. Adjust or bypass it for testing.

5.2 Distorted Sound:

• Sovraccarico Amplificatore: Ridurre il amplifier's volume or gain. Distortion often occurs when the amplifier is pushed beyond its clean power capabilities (clipping).
• Improper Impedance Match: Assicurati che amplifier's output impedance matches the subwoofer's impedance. Mismatched impedances can lead to distortion and potential damage.
• Cavo danneggiato: Try replacing the Speakon cable to rule out a faulty cable.
• Subwoofer Damage: If distortion persists at low volumes and with proper amplifier settings, the subwoofer's driver may be damaged. Contact a qualified service technician.

5.3 Low or Weak Bass Output:

• Phase Issue: If using multiple speakers, ensure they are in phase. Incorrect phasing can cause bass cancellation.
• External High-Pass Filter: Check if an external high-pass filter is set too high, cutting off desired bass frequencies.
• Amplificatore Potenza: Assicurare il amplifier has sufficient power to drive the subwoofer effectively.
• Posizionamento: Subwoofer placement significantly affects bass response. Experiment with different positions in the room.

6. Specifiche

7. Garanzia e supporto

7.1 Informazioni sulla garanzia:

The Electro-Voice Sb122 12" 400W Passive Subwoofer comes with a Garanzia limitata. Please refer to the official Electro-Voice warranty documentation for specific terms, conditions, and duration of coverage. Retain your proof of purchase for warranty claims.

7.2 Additional Support:

For further assistance, detailed technical information, or service inquiries, please refer to the official user manual PDF or contact Electro-Voice customer support.

• Manuale utente ufficiale (PDF): Manuale Scarica il PDF
• Produttore Websito: Visitare il Negozio Electro-Voice su Amazon per informazioni sui prodotti e risorse di supporto.