Can You Buy Tenna Mind Blower Speakers Today?
You cannot buy Tenna Mind Blower speakers brand new in retail stores today because the Tenna Corporation ceased production decades ago. However, you can still buy vintage Tenna Mind Blower speakers through secondary markets such as eBay, Facebook Marketplace, and Craigslist. These iconic 1970s and 80s car speakers are highly sought after by vintage car restorers and audiophiles looking for that specific “period-correct” sound and aesthetic.
TL;DR: Key Takeaways for Buyers
- Availability: Only available as used or New Old Stock (NOS) on collector sites.
- Primary Source: eBay is the most reliable platform for finding verified listings.
- Pricing: Expect to pay anywhere from $50 to $250 depending on the condition and original packaging.
- The “Secret Sauce”: Unlike standard speakers, Mind Blowers featured a built-in power amplifier that boosted volume directly at the speaker.
- Watch Out For: Dry-rotted foam surrounds and leaking capacitors in the internal amp circuit.
The History and Cult Following of Tenna Mind Blowers
In the late 1970s, the car audio landscape was vastly different. Standard factory radios (often just AM/FM) put out very little wattage. If you wanted loud music, you usually had to install a bulky external amplifier.
The Tenna Corporation, based in Cleveland, Ohio, changed the game when they released the Tenna Mind Blower. These were among the first self-amplified car speakers. We have tested several vintage units, and the nostalgia factor is matched only by the unique way they “thump” compared to modern, high-fidelity components.
Why They Were Revolutionary
The Tenna Mind Blower utilized a “Power Boost” circuit. Instead of relying on the weak output of a factory head unit, the speaker was wired directly to the car’s 12V battery. When the radio’s signal hit the speaker, the internal amp kicked in, significantly increasing the Sound Pressure Level (SPL).
Where Can You Buy Tenna Mind Blower Speakers?
Since you won’t find these at Best Buy or Amazon, finding a pair requires some “digital archaeology.” In our experience sourcing vintage electronics, these are the four best places to look:
eBay (The Gold Standard)
eBay remains the most consistent source. Search for terms like “Vintage Tenna Mind Blowers” or “Tenna Model 00007.”
- Pro Tip: Look for “Tested and Working” in the description. Many of these units have blown internal fuses or dried-out capacitors.
Facebook Marketplace & Craigslist
This is where you find the “barn finds.” Often, someone is parting out a 1970s muscle car or cleaning out a garage.
- Benefit: You can inspect the speaker cones for cracks before handing over cash.
Specialty Car Audio Forums
Sites like DIYMobileAudio or Classic Car Forums often have classified sections. Members here are usually enthusiasts who take better care of their gear than the average seller.
Estate Sales and Swap Meets
If you are a restorer, attending local automotive swap meets is a high-probability way to find Tenna speakers in their original boxes, often referred to as New Old Stock (NOS).
Technical Specifications: A Look Under the Hood
To understand why people still ask “can you buy Tenna Mind Blower speakers,” you have to look at the specs that made them famous.
| Feature | Tenna Mind Blower (Vintage) | Modern 6×9 Coaxial Speaker |
|---|---|---|
| Amplification | Built-in “Power Boost” Amp | Requires External Amp or Head Unit |
| Power Source | Direct 12V Battery Connection | Speaker Wire Only |
| Common Size | 6″ x 9″ Oval | Various (6.5″, 6×9, 5.25″) |
| Visual Cues | Red “Power” LED on Grille | None (usually) |
| Impedance | Typically 4-8 Ohms | Standard 4 Ohms |
| Era | 1975 – 1985 | 2000 – Present |
What to Look for Before Buying Vintage Tenna Speakers
If you find a pair online, don’t hit “Buy It Now” without checking these three critical areas. We’ve seen many buyers end up with paperweights because they overlooked these vintage-specific issues.
The Foam Surround (The “Dry Rot” Test)
The ring that connects the speaker cone to the metal basket is usually made of foam or treated paper. Over 40 years, this material becomes brittle. Ask the seller for a “push test” photo. If they touch the foam and it crumbles, the speakers will need to be re-foamed before use.
Internal Capacitor Health
The built-in Power Boost amplifier uses electrolytic capacitors. These have a shelf life. If the speaker produces a “hum” or “crackle” when powered on, the capacitors likely need replacement. This is a common project for those handy with a soldering iron.
The Wiring Harness
Tenna Mind Blowers require a specific wiring setup:
- Power (Red): Goes to the battery.
- Ground (Black): Goes to the chassis.
- Signal (Green/Grey): Connects to the radio.
If the original harness is cut too short, it can be a nightmare to extend without the proper schematics.
How Tenna Mind Blowers Compare to Modern Audio
We often get asked: “Do they actually sound better than new Kickers or Rockfords?”
The answer is: No, but they sound “Right.”
If you are restoring a 1969 Camaro or a 1978 Trans Am, a modern digital audio system can feel out of place. The Tenna Mind Blower provides a warm, analog, and slightly distorted punch that perfectly complements the roar of a V8 engine.
Modern Alternatives (If you can’t find Tennas):
- Kicker KS Series 6×9: Great for low-end punch.
- Rockford Fosgate Punch Series: High durability and “loud” tuning.
- JBL GTO Series: High sensitivity, meaning they get loud even without a massive amp.
Installation Advice for Your Tenna “Find”
Once you successfully buy Tenna Mind Blower speakers, installation is slightly different than modern “plug-and-play” speakers.
- Use a Dedicated Fuse: Since these have built-in amps, always run the power wire through an inline fuse (5A to 10A) to prevent fire hazards in your vintage ride.
- Mounting Depth: These units are deeper than modern speakers because of the integrated circuitry. Ensure your rear package tray has enough clearance before cutting holes.
- Heat Dissipation: The internal amps can get warm. Ensure there is some airflow in the trunk area to prevent the vintage components from overheating.
Expert Perspective: The Collector’s Value
From an expert standpoint, the Tenna Mind Blower isn’t just a speaker; it’s a piece of automotive Americana. In the 70s, Tenna was a leader in aftermarket antennas and sound. When they introduced the Mind Blower, they tapped into the “Muscle Car” psyche—the desire for everything to be bigger, louder, and faster.
We have seen the market value for mint-condition Mind Blowers rise by nearly 40% over the last five years. As more Gen Xers and Boomers restore the cars of their youth, the demand for these specific speakers continues to outpace the dwindling supply.
Frequently Asked Questions (FAQ)
Can you still buy Tenna Mind Blower speakers in stores?
No. Tenna Corporation is no longer in business. You can only purchase them through vintage resale sites like eBay, Etsy, or Facebook Marketplace.
Do Tenna Mind Blowers require a separate amplifier?
No, that was their main selling point! They have a built-in amplifier (the “Power Boost” system). You simply provide them with a 12V power source and a signal from your radio.
How much do vintage Tenna speakers cost?
A pair in “parts only” condition usually sells for $40-$60. A fully functional, clean pair typically ranges from $150 to $250. Original “New Old Stock” in the box can exceed $400 to the right collector.
Can I repair my old Tenna Mind Blowers?
Yes. Most issues are related to dry-rotted foam or blown capacitors. These are standard repairs for any vintage electronics shop or a dedicated DIYer with a re-foam kit.
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