MICROPHONE AND AUDIO INPUT CONSIDERATION

You may choose almost any transducer to convert sound into an electrical signal for your BN9. Some of the transducers are as follows; ceramic, crystal, dynamic, or even another speaker! You may also use audio from any other source as well (other than a zillion watt per channel power amp!)

GAIN CONSIDERATIONS

In applications where you don't need so much gain, such as amplifying earphone outputs, you may wish to omit the pre-amplifier stage. This is done by removing (or just plain not installing) the preamp transistor and substituting a jumper (made from a scrap component lead) for R1. This allows you to still get the full 2 1/2 watts of audio output but reduces the total gain to 50. There is no point in feed- ing the LM380 more audio signal, it just results in poorly distorted audio with no additional power out- put gained.

TROUBLESHOOTING

Problem: LM380 gets really hot, and then quits!

Solution: Cool your jets! You are probably running maximum voltage and maximum power for too long. Either reduce the voltage to 10-12 volts or reduce your volume level. You may need to replace the LM380.

Page 7 Page 9
Page 8
Image 8
Ramsey Electronics BN9 manual Microphone and Audio Input Consideration, Gain Considerations, Troubleshooting
Page 7 Page 9

BN9, 2 1/2 Watt Super Sleuth Audio Amplifier specifications

The Ramsey Electronics 2 1/2 Watt Super Sleuth Audio Amplifier, model BN9, is a compact yet powerful device designed for enthusiasts and professionals seeking high-quality audio amplification solutions. Engineered with precision, the BN9 amplifier stands out for its ability to deliver robust audio performance in a remarkably small footprint. It is especially favored for use in surveillance applications, audio monitoring, and small-scale public address systems.

One of the main features of the BN9 amplifier is its impressive output power. With an output of 2.5 watts, it is capable of driving small speakers effectively, making it an excellent choice for personal audio projects or discreet monitoring setups. The ability to output this power while maintaining clarity ensures that users can enjoy high-fidelity sound without distortion, even at higher volume levels.

The BN9 incorporates innovative technologies that enhance its functionality and ease of use. The amplifier is equipped with a built-in power supply, which simplifies setup and eliminates the need for additional external components. This feature is particularly beneficial for users who may not have extensive technical knowledge, allowing for a straightforward plug-and-play operation. Additionally, the amplifier boasts a compact design, measuring just a few inches across, making it easy to integrate into various setups without consuming valuable space.

Another noteworthy characteristic of the Ramsey BN9 is its versatility. It can be used with a wide range of audio sources, including microphones, audio players, and computers, making it suitable for diverse applications. Furthermore, the unit features adjustable volume controls, allowing users to tailor the sound output to their specific requirements. The use of high-quality components ensures durability and longevity, which is essential for both casual users and professionals who rely on consistent performance.

In terms of connectivity, the BN9 amplifier is designed for user-friendly integration, featuring standard input and output jacks that accommodate various audio devices. This flexibility further enhances its usability in multiple settings, from home audio systems to more complex surveillance configurations.

In conclusion, the Ramsey Electronics 2 1/2 Watt Super Sleuth Audio Amplifier, BN9, combines quality, versatility, and ease of use into a single compact unit, making it an excellent choice for anyone seeking reliable audio amplification in a wide array of applications. Whether for home use, surveillance, or public announcements, the BN9 continues to receive acclaim for its performance and functionality.
Top Page Image Contents