MI-1428 Comparison
| photo | price | summary | rating |
|---|---|---|---|
 | $349.99 | Condition is , Single - Vintage RCA MI-9449 15" Woofer 15-inch Speaker, shipping cost = $75.00 | 99.7% |
| photo | price | summary | rating |
|---|---|---|---|
 | $35.00 | Condition is Used, Field Coil Speaker Horn Driver Plug RCA MI-1428b Lansing 285 297, shipping cost = $8.75 | 100.0% |
The RCA MI-1428 Speaker Impedance Transformer is an essential audio component designed specifically for use with RCA's MI-9449 and MI-9584 amplifiers. This transformer is engineered to adapt the speaker output impedance of various speakers to match the optimal impedance level required by these amplifiers, ensuring the best possible sound performance.
The MI-1428 features a robust and durable design, with a chassis constructed from high-quality steel to shield against electromagnetic interference and provide superior build quality. It also includes gold-plated RCA input and output terminals, which offer excellent contact stability and ensure a secure connection between your amplifier and speakers.
This transformer adapts speaker impedances as low as 4 ohms up to 16 ohms, providing versatility for a wide range of speaker applications. The transformation ratio is 1:1, which means that the output impedance of the transformer is the same as the input impedance, making it a straight-forward and effective solution for impedance matching.
The RCA MI-1428 Speaker Impedance Transformer is designed for easy integration into your audio system. It is compact and lightweight, with dimensions of 1.5 inches by 2.6 inches by 1.3 inches (WxDxH) and a weight of just 0.3 pounds. It can be conveniently placed near your amplifier and speakers, allowing for simple and efficient setup.
In summary, the RCA MI-1428 Speaker Impedance Transformer is an indispensable tool for optimizing the performance of your MI-9449 and MI-9584 amplifiers. It ensures impedance compatibility with a variety of speakers, providing excellent sound quality and reliability for audio enthusiasts and professionals alike.
The RCA MI-1428 speaker impedance transformer is a device designed to match the impedance of sources, such as receivers or amplifiers, with the impedance of speakers that have different impedance specifications. This transformer is specifically designed for use with the RCA MI-9449 and MI-9584 speakers. Here are some potential pros and cons of buying this transformer:
Pros:1. Compatibility: If you own RCA MI-9449 or MI-9584 speakers but your source component has a different impedance rating, this transformer can help ensure a proper electrical connection between the two.
2. Power Handling: The RCA MI-1428 transformer can handle up to 50 watts per channel, making it suitable for use with higher-powered amplifiers.
3. Impedance Matching: Proper impedance matching can lead to better performance, including improved sound quality, increased efficiency, and reduced potential for damage to the speakers or source component.
Cons:1. Additional Cost: The RCA MI-1428 transformer is an additional expense that may not be necessary for all audio setups.
2. Complexity: Using a transformer adds an extra step and component to your audio setup, which may be undesirable for those who prefer simpler systems.
3. Size: The size of the transformer may take up additional space in your audio setup, especially if you are working in a limited space.
In conclusion, the RCA MI-1428 speaker impedance transformer can be a valuable tool for those who own RCA MI-9449 or MI-9584 speakers and need to match their source component's impedance. The benefits of proper impedance matching, such as improved sound quality and increased efficiency, can outweigh the additional cost, complexity, and size of the transformer for some users. However, it is essential to consider whether the transformer is truly necessary for your specific audio setup, as not all speakers and components will require impedance matching. Ultimately, if you determine that an impedance transformer is necessary for your setup, the RCA MI-1428 is a reliable and capable option. If you are unsure, it may be worth consulting a professional audio technician or retailer for advice.
Details:
These came from a 1930s Rca theatre speaker I recently found and are in working condition. For sale is a pair of Rca impedance matching transformers.
specifications vintaspeaker:
- brand: Rca
- mpn: Mi-1428
- model: Rca Mi-9449 Mi-9584 Mi-1428
- part type: Transformer Speaker
offer vintaspeaker:
- in stock #: 2
- options: ship-to-home
- availability: in stock
- sold #: 22
- prices: $35.00–$349.99
- item condition: Used
- started: january 20, 2025
returns vintaspeaker:
- policy: no returns
seller vintaspeaker:
- city: saint james, new york
- # reviews: 2301
- rating: 100.0%
shipping vintaspeaker:
- type: calculated
- class: expedited
- carrier: usps
- transit: 4-9 days
- service: usps priority mail medium flat rate box
payments vintaspeaker:
- wallet: apple-pay
- credit card: discover
- other
general vintaspeaker:
- category: Electronics > Audio Video > Vintage Speakers