30HSN-SA

Introducing the Hempopotamus 30HSN/SA 12 Alnico Speaker from Hemp Cones, a unique and innovative addition to any audio system. This speaker cone is meticulously crafted using a proprietary blend of hemp and paper, offering a distinctive combination of lightweight strength and exceptional acoustic properties.

At the heart of this speaker cone is a 12-inch Alnico magnet, renowned for its ability to deliver clear, detailed sound with a rich, warm tone. The Alnico magnet provides a powerful magnetic field, enabling the speaker to reproduce a wide range of frequencies with remarkable accuracy.

The Hempopotamus 30HSN/SA 12 Alnico Speaker features a Fat PMR cone design, which refers to the increased radius of the cone's midrange section. This design provides several benefits, including improved midrange clarity, enhanced bass response, and a more natural, balanced sound.

The hemp and paper composite used in the construction of the cone offers several advantages over traditional materials. Hemp is a sustainable, eco-friendly alternative to petrochemical-based materials, and its unique fibrous structure provides superior stiffness and damping properties. The paper used in the cone is sourced from responsibly managed forests, ensuring a minimal carbon footprint throughout the entire manufacturing process.

The Hempopotamus 30HSN/SA 12 Alnico Speaker is not only an environmentally conscious choice but also a sonic one. Its unique combination of materials and design elements results in a speaker that delivers clear, detailed sound with a rich, warm tone, making it an excellent choice for music enthusiasts, audiophiles, and professional audio applications.

This speaker cone is compatible with a wide range of amplifiers and audio systems, allowing you to easily integrate it into your existing setup. Its robust construction ensures durability and reliability, providing you with years of exceptional performance.

In summary, the Hempopotamus 30HSN/SA 12 Alnico Speaker from Hemp Cones is a unique, eco-friendly, and high-performance addition to any audio system. Its combination of hemp and paper composite, Alnico magnet, and Fat PMR cone design delivers clear, detailed sound with a rich, warm tone, making it an excellent choice for music enthusiasts, audiophiles, and professional audio applications.

Hempopotamus Alnico Speaker with PMR Cone: An In-depth Analysis

The Hempopotamus Alnico Speaker with PMR Cone, model number 30HSN/SA 12, is a unique speaker offering made from hemp material and featuring a fat PMR cone. In this analysis, we will discuss the potential pros and cons of purchasing this speaker.

1. Eco-friendly: The speaker is made from hemp material, which is a sustainable and eco-friendly alternative to traditional speaker materials like wood or plastic.

2. Unique sound: The PMR cone, made of a specific material, is said to provide a unique sound with improved bass response and clarity.

3. Durability: Alnico magnets are known for their durability and resistance to demagnetization, making the speaker suitable for long-term use.

1. Limited availability: Due to the unique materials used and small production scale, the Hempopotamus Alnico Speaker may be harder to find and purchase compared to more common speaker models.

2. Price: As a specialty speaker made with premium materials, the Hempopotamus Alnico Speaker may carry a higher price tag compared to standard speakers.

3. Compatibility: Depending on your specific audio equipment, the speaker may not be directly compatible, requiring additional adapters or modifications to work properly.

The Hempopotamus Alnico Speaker with PMR Cone presents an intriguing option for those seeking a unique, eco-friendly, and durable speaker solution. Its potential advantages include its eco-friendly hemp construction, the unique sound provided by the PMR cone, and the durability offered by the alnico magnets. However, its limited availability, higher price tag, and potential compatibility issues may deter some potential buyers. Ultimately, the decision to purchase the Hempopotamus Alnico Speaker depends on your personal preferences, budget, and specific audio requirements.

If you are an audiophile looking for a unique speaker solution with a strong focus on sustainability, the Hempopotamus Alnico Speaker with PMR Cone could be an excellent choice for your setup. However, if you prioritize affordability, ease of availability, or compatibility with your existing equipment, you may want to consider alternative speaker options. We recommend researching further and carefully considering your needs before making a purchasing decision.

Details:

The magnetic gap was verified with a Gauss/flux probe and measured just fine, so it purposely not de-magnetized/ re-magnetized. It should be infinitely light and stiff. Which is physically impossible but this a huge step in that direction compared to anything else out there. Alnico brass hemp fat, thick, meaty tonality.

This was lightly treated with rezone-ex in order to prevent any cone edge resonance issues, and omit secondary or ghost-notes from being reflected back into the cone, air. Dust cap this was purposely chosen to extend the frequency response. This really lowers moving mass, and aids in speed, detail resolution. This unit really is greater than the sum of its parts.

I'll itemize: front gaskets-these are the high quality Rubik-TeX 4/8 hole mounting gaskets that look to be made from granulated rubber and cork. Now, this is a pretty nice coil. I refuse to use any of that caw or steel, aluminum crap. It was treated with special Eastman Kodak chemicals to loosen the fibers in that area only, and aids low frequency response.

Some people say these old oem magnetic assemblies sweeten with age, and after I heard it, have to agree. Stronger and lighter are the way you want to go for perfect cone. Up for grabs is this tremendous sounding 12 alnico brass sleeve hemp fiber cone speaker./. By using copper you get true signal transference to the coils, and your tonality will show it.

And when you use the special 11 gram, neck dipped proprietary Hempopotamus shacked apex shaped cone assembly, also get speed, resolution, accuracy, and a well balanced mid range top end that is even better than usual hemp-o. This is the proprietary. Its like getting the extended response of an extra whizzed cone, but without mass. And that's exactly how and why this works.

There are no after market, replacement, or import China crap in it, but only American made parts. Fully tested under diagnostics and operates without any rubbing, smoking, buzzing, holes, rips, or tears its basically a brand new speaker only better. LTZ wires these are copper lit wires. From the inside out, its basically a new speaker again only better.

Any questions or concerns, just ask. You'll notice that darker area acts like a short horn. This 1960s gem was stripped down to bare metal and magnet, then everything replaced. I only use solid copper wound coils.

The apex area is where the uniqueness comes in. Then everything from the inside out is all new components. This was also lightly coated on the inside with Mrs rezone-ex, to keep response smooth and without peaks in. Surround this is also a hemp fiber material, as its part of the molded cone assembly.

That part of the body is curve-linear in profile. The frame was stripped down, and then shot with a nice black lacquer to look as good it sounds. That gray stuff does nothing but smudge and smear the signal before it even gets to your voice coil. I can't really add anything constructive to the i've already typed.

Cones become directional at a frequency determined by the diameter, as well top end is limited due to mass. Its quick, detailed and nimble because of a much lower weight.

specifications vintaspeaker:

• brand: Hempopotamus
• mpn: 30hsn/sa
• part type: Speaker
• country of origin: United States

offer vintaspeaker:

• availability: in stock
• best offers: true
• options: ship-to-home
• prices: $109.99–$119.99
• item condition: Used
• in stock #: 2
• sold #: 13
• started: december 3, 2025

seller vintaspeaker:

• city: west salem, ohio
• rating: 100.0%
• # reviews: 119

shipping vintaspeaker:

• service: usps ground advantage
• transit: 6-11 days
• type: fixed
• class: standard
• carrier: usps

payments vintaspeaker:

• wallet: apple-pay
• credit card: diners-club
• other

returns vintaspeaker:

• policy: no returns

general vintaspeaker:

• category: Electronics > Audio Video > Vintage Speakers

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