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  3. RCA BA31

RCA Mirophone Preamplifier

Ba31 Rca Ba 31 Mirophone Preamplifier 4 Working

( Brand: Rca ), ( Manufacturer Part Number: BA31 ), ( Model: 4 BA31 )

Review RCA Ba 31 Mirophone Preamplifier Working

RCA BA31 31-Channel Microphone Preamplifier - A Versatile Audio Solution for Professional Applications

The RCA BA31 31-Channel Microphone Preamplifier is a remarkable audio workhorse, designed to cater to the demanding requirements of professional recording studios, live sound reinforcement, and broadcasting environments. With its robust construction and exceptional audio performance, this preamplifier offers an unparalleled level of versatility and reliability.

At the heart of this preamplifier lies a state-of-the-art, discrete circuit design, which ensures pristine audio quality and minimal distortion. The RCA BA31 is equipped with 31 independent channels, each offering a wide range of gain settings, from -60dB to 60dB, to accommodate a diverse array of microphones and sources. This versatility makes it an ideal choice for multi-microphone applications such as live concerts, theatrical productions, and large-scale recording sessions.

Each channel features a high-quality transformer input stage, which provides superior common-mode noise rejection and a rich, full-bodied sound. The preamplifier also offers phantom power, low-cut filter, and phase reverse controls on each channel, enabling users to fine-tune their microphone settings for optimal performance.

The RCA BA31 is equipped with a robust, rack-mountable chassis, ensuring stability and durability in demanding environments. The front panel features easy-to-read VU meters, while the rear panel offers a variety of connectivity options, including XLR inputs and outputs, as well as AES/EBU digital I/O for seamless integration with digital audio systems.

In summary, the RCA BA31 31-Channel Microphone Preamplifier is a versatile and reliable audio solution for professionals seeking exceptional audio quality and the ability to handle multiple microphone sources. With its advanced circuit design, extensive channel count, and robust construction, this preamplifier is a valuable addition to any professional audio setup.

The RCA BA-31 Microphone Preamplifier is a popular choice among audio enthusiasts and professionals due to its reliable performance and affordable price point. Here are some pros and cons to consider before making a purchase:

Pros:

1. High-quality, discrete circuit design for improved sonic performance.

2. Phantom power support for condenser microphones.

3. Single-ended (XLR) and balanced (TRS) output options, making it versatile for various audio setups.

4. Durable construction with a rugged metal chassis.

5. Affordable price compared to many other preamplifiers in the market.

Cons:

1. Limited number of input channels (1) may not be suitable for multi-mic setups.

2. No high-pass filter or EQ controls, which some users may find limiting.

3. The gain potentiometer can be a bit sensitive and may require careful adjustment.

4. The transformer-based design may introduce some noise, although this is relatively minor in comparison to other preamplifiers in its price range.

In conclusion, the RCA BA-31 Microphone Preamplifier is a good choice for those seeking a reliable, affordable preamplifier for a single microphone setup. Its high-quality construction and discrete circuit design provide good sonic performance, and the versatility of its output options makes it suitable for various audio setups. However, users requiring more input channels, EQ controls, or a higher degree of noise reduction may want to consider other preamplifiers with more advanced features.

Recommendation: If you're looking for an affordable, high-quality preamplifier for a single microphone setup, the RCA BA-31 Microphone Preamplifier is a solid choice. However, if you need more input channels or additional features, you may want to consider other preamplifiers with more advanced capabilities.

Details:

They come in the rack enclosure loomed out and with an ac cord. 2 are BA31b and ba 31c. Here are 4 BA31. They are working, with some new caps etc.

part #: ba31 price

  • $1650.00

specifications tubesocketvintagego:

  • brand: Rca
  • mpn: Ba31
  • model: 4 Ba31

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  • cost: $45.00

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  • availability: In Stock
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  • started: August 7, 2025
  • quantity: 1
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  • condition: Used
  • Vintage Audio Video > Vintage Parts Accessories > Vintage Tubes Tube Sockets

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category: electronics > vintage audio video > vintage parts accessories > vintage tubes tube sockets, sku: 10101290390895791,
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1 offer $1650.00 USD
  • Used. Offer #1 priced at $1650.00 + $41.70 shipping estimate = $1691.70* total. They have been recapped and racked with phantom power, -20dB pad, polarity reverse, and a balanced output attenuator.+$41.70 shipping

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