1. Home Speakers Subwoofers For Sale
  2. sku: 17714921504949673
  3. ENERGY S12.3

ENERGY S12.3 Subwoofer Power Amplifier 300W

S12.3 Energy Subwoofer With 300w Power Amplifier

( Brand: Energy ), ( Manufacturer Part Number: S12.3 ), ( Type: Subwoofer ), ( Connectivity: Wired )

Review ENERGY Subwoofer Power Amplifier

The Energy S12.3 subwoofer is a powerful and high-performance audio component designed to deliver deep, rich bass for music and home theater systems. This subwoofer features a 12-inch long-throw woofer cone made of advanced materials, including a polypropylene cone and rubber surround, which ensures excellent bass response and durability. The S12.3 also boasts a high-power 300-watt RMS (Root Mean Square) power amplifier that is built into the enclosure, providing plenty of power to drive the woofer and produce impressive bass levels.

The amplifier is a Class D design, which is known for its efficiency, compact size, and excellent power-to-weight ratio. It is also equipped with a variable low-pass filter and adjustable phase control, allowing users to fine-tune the bass response to their specific system and room acoustics. The subwoofer's cabinet is constructed of high-density medium-density fiberboard (MDF), which provides excellent rigidity and resonance control, resulting in a clear and accurate bass response.

Additional features of the Energy S12.3 subwoofer include a front-firing port design, which helps to minimize cabinet vibration and distortion, and a push-button on/off switch, which is conveniently located on the back of the amplifier. The subwoofer also comes with a set of adjustable feet, which allow for leveling and fine-tuning of the bass response based on the position of the subwoofer in the room. Overall, the Energy S12.3 subwoofer is a high-performance and versatile audio component that is ideal for music and home theater enthusiasts who demand deep, accurate, and powerful bass.

The S12.3 subwoofer from Energy Audio and the 300W Power Amplifier are both popular choices for those looking to enhance their audio experience, particularly in the bass department. Here are some pros and cons of investing in this combination:

**Subwoofer (Energy S12.3):** Pros:

1. High power handling capacity (up to 1000 watts RMS)

2. Large 12-inch driver for increased bass response

3. Front-firing port design for improved low-frequency extension

4. Compact and lightweight design for easy installation

5. Durable and robust construction for long-term use

Cons:

1. Requires a dedicated amplifier for optimal performance

2. May not be suitable for very small spaces or rooms

3. May require additional acoustic treatment for optimal sound quality

**Power Amplifier (Energy 300W):** Pros:

1. High power output (300 watts RMS)

2. Class D design for efficient power delivery

3. Variable low-pass filter for customized frequency response

4. Balanced XLR and unbalanced RCA input options

5. Protective features, such as thermal overload protection

Cons:

1. May not provide enough power for very large subwoofers or multiple subwoofers

2. Size and weight may make it less portable

3. May require additional power conditioning equipment for optimal performance

**Conclusion:**

The combination of the Energy S12.3 subwoofer and the Energy 300W power amplifier offers a powerful and dynamic audio experience. The large subwoofer driver and high-power amplifier work together to deliver deep, resonant bass that can transform the listening experience.

However, it's important to keep in mind that this setup requires a dedicated amplifier and may not be suitable for very small spaces or rooms. Additionally, the amplifier may require additional power conditioning equipment for optimal performance.

If you're looking for a powerful and dynamic subwoofer setup, this combination from Energy Audio could be a great choice. However, it's important to consider the space and power requirements before making a purchase.

**Recommendation:**

If you're in the market for a powerful subwoofer and amplifier setup, the Energy S12.3 subwoofer and Energy 300W power amplifier are certainly worth considering. They offer a high level of power handling, deep bass response, and customizable frequency response, making them an excellent choice for music and home theater applications.

However, it's important to ensure that you have the necessary space and power requirements to support this setup. If you're unsure, it may be worth consulting with a professional audio installer or consultant to help you make the best decision for your specific needs.

Details:

Shows scuffs/scratches and mild staining but is guaranteed working. Please see photos for personal cosmetic evaluation and specifics. Up for sale is a Energy S12.3 subwoofer with 300W power amplifier. Weighs 47 pounds before packing which accounts for shipping cost.

part #: s123 price

  • $250.00

specifications shuspea:

  • brand: Energy
  • mpn: S12.3
  • type: Subwoofer
  • connectivity: Wired

offer shuspea:

  • quantity: 1
  • started: February 10, 2026
  • options: Ship-to-home
  • sold: 0
  • availability: In Stock

returns shuspea:

  • paid by: Buyer
  • policy: Returns Accepted
  • method: Money back
  • time: 30 Days

payments shuspea:

  • credit card: Mastercard
  • wallet: Google-pay
  • other

general shuspea:

  • condition: Used
  • TV, Video Home Audio > Home Audio > Home Speakers Subwoofers

seller shuspea:

  • # reviews: 36497
  • city: Huntington Beach, California
  • rating: 99.7%

shipping shuspea:

  • transit: 3-9 Days
  • type: Fixed
  • cost: $74.95
  • service: Standard
  • class: Standard
type: subwoofer, connectivity: wired,
category: electronics > tv, video home audio > home audio > home speakers subwoofers, sku: 17714921504949673,
Energy S12.3 Is Similar To:
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1 offer $250.00 USD
  • Used. Offer #1 priced at $250.00 + $44.33 shipping estimate = $294.33* total. This thing really cranks for it size, and is a great solid build with a nice gloss black finish. Nice ENERGY ESW-M8 ultra-compact powered subwoofer.+$44.33 shipping

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