APM-4

COIL, Sony

26 offers available: $49.99–$499.99
APM-4 SONY Esprit Woofer Voice Coils

The Sony APM-4 Esprit and APM-77 woofer voice coils are high-performance components designed for professional audio applications. These voice coils are engineered with advanced materials and technologies to deliver superior sound quality and durability.

The APM-4 Esprit voice coil is a 4-inch model, suitable for use in compact enclosures and applications where space is limited. It features a copper clad aluminum wire (CCAW) voice coil, which offers excellent conductivity and thermal stability. The voice coil is also surrounded by a rubber suspension system, which ensures smooth movement and minimizes distortion. The APM-4 Esprit voice coil is ideal for use in applications where high power handling and low distortion are essential, such as in PA systems, stage monitors, or portable sound systems.

The APM-77 woofer voice coil, on the other hand, is a larger 7-inch model, designed for use in larger enclosures and applications where greater bass response is required. It also features a CCAW voice coil, but with a larger diameter and greater wire length to handle the increased power and excursion needed for deeper bass. The APM-77 voice coil is also designed with a robust magnet structure and a reinforced spider to ensure reliable performance even under heavy usage. This voice coil is commonly used in applications such as car audio systems, home theater systems, and professional PA systems.

Both the APM-4 Esprit and APM-77 voice coils are engineered to meet the highest standards of quality and reliability. They are built to withstand the rigors of professional use, with robust construction, superior materials, and advanced technologies. Whether you're building a custom audio system for a live music venue or upgrading the sound system in your car, these voice coils are an excellent choice for delivering clear, powerful sound and exceptional performance.

The Sony APM-4 Esprit and APM-77 woofer voice coils are popular choices among audio enthusiasts due to their high-quality construction and superior sound performance. However, like any other component, they have their pros and cons.

Pros of Buying Sony APM-4 Esprit and APM-77 Woofer Voice Coils:

1. Superior Sound Quality: Sony voice coils are renowned for their high-quality sound performance. They offer excellent linearity, low distortion, and high power handling capacity, resulting in clearer and more accurate sound reproduction.

2. Durability: Sony voice coils are built to last. They use high-quality materials and advanced manufacturing techniques to ensure that they can handle the rigors of extended use without failing.

3. Consistent Performance: Sony voice coils are known for their consistent performance. They offer excellent stability and reliability, ensuring that they produce the same high-quality sound over time.

4. Wide Compatibility: Sony voice coils are compatible with a wide range of speakers and systems, making them a versatile choice for audio enthusiasts.

Cons of Buying Sony APM-4 Esprit and APM-77 Woofer Voice Coils:

1. Cost: Sony voice coils are more expensive compared to other brands. This can be a significant barrier for some audio enthusiasts who are on a budget.

2. Availability: Sony voice coils are not as widely available as other brands, making it harder for some people to find them.

3. Complex Installation: Installing Sony voice coils can be more complex than other brands due to their unique design and construction. This may require additional expertise and tools.

Conclusion:

The Sony APM-4 Esprit and APM-77 woofer voice coils offer superior sound quality, durability, consistency, and wide compatibility, making them an excellent investment for audio enthusiasts. However, their high cost, limited availability, and complex installation process can be a significant barrier for some people.

Recommendation:

If you are an audio enthusiast who values high-quality sound performance and is willing to invest in a long-lasting and consistent component, then the Sony APM-4 Esprit and APM-77 woofer voice coils are an excellent choice. However, if cost is a significant concern, or if you prefer a more widely available and easier-to-install option, then you may want to consider other brands. Ultimately, the decision comes down to your individual preferences and budget.

Details:

Up for sale is this replacement pair of APM-4 woofers these are the same as APM-77, but frames on these anodized vs bare brushed aluminum APM-77. Please see all pictures and ask any questions. They still sound wonderful as they sit and I have around 100 hours work of listening on these. Both woofers ohm out in spec for having all four voice coils functional.

These woofers used a foam backing between the aluminum foil film and in some places has come loose. I tried taking a few pictures of some areas from the backside speaker showing this. Where it is still firmly bonded, I would recommend brushing a thin layer over the edges to just air in keeping everything together. New surrounds were installed three years ago.

Sold as-is please these were spares I had used in my APM-4 speakers that later swapped out for another pair of woofers. These are in overall very good condition with some light dents and scuffs on the packet frames.

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