Importance Of Proper Biasing | Crate Amplifiers V32H guide

V32H GUITAR AMPLIFIER HEAD

Important Information About Tubes and Tube Products (continued):

You can check your preamplifier tubes for microphonics by turning the amplifier on, turning up the gain and tapping lightly on each tube with the end of a pencil or a chop stick (my favorite). You will be able to hear the tapping through your speakers, which is normal. It is not normal for a tube to ring like a bell after it’s tapped. If it does ring then it’s microphonic and should be replaced. Remember to use only high quality, low microphonic tubes in the preamplifier section.

Even though power tubes are rarely microphonic, you should check them anyway. The power tubes can be checked for microphonics just like pre-amp tubes.

In the case of very high gain amps, you may be able to reduce the amount of noise generated by simply swapping the preamp tubes around.

The Importance Of Proper Biasing:

For the best performance and longest tube life, proper biasing is imperative. Bias is the negative voltage which is applied to the power tube’s control grid to set the level of idle current. We cannot over emphasize the difference in warmth of tone and dynamic response that come with proper biasing. If the bias is set too high (overbiased), the sound from the amp will be distorted at all levels. If the bias is set too low, (under biased) the power tubes will run hot (the plates inside the tubes may glow red due to excessive heat) and the sound from the amplifier will lack power and punch. The excessive heat greatly reduces tube life – from a few days to as little as a few hours in extreme cases. Setting the bias on your amp is like setting the idle on your car. If it’s too high or hot it’s running away with you and if it’s too low or cold it will choke when you step on it.

The bias is adjusted at the factory in accordance with the type of power tube(s) installed in your amplifier. It is important to point out that tubes of the same type and specification typically exhibit different performance characteristics. Consequently, whenever power tubes are replaced, the bias voltage must be checked (unless the amplifier is equipped with "self-biasing circuitry) and readjusted to accommodate the operating parameters of the replacement tubes.

Depending on the model and amplifier type, there may be hum balance controls, trim pots, or bias adjust- ment controls on its rear panel. However, the bias adjustment should be performed only by qualified service personnel with the proper, calibrated test equipment.

V32H specifications

The Crate Amplifiers V32H is a powerhouse of versatility and performance, designed to meet the demands of guitarists across a range of genres. This all-tube guitar amplifier head boasts a robust and elegant design, showcasing the perfect blend of classic and modern technology that makes it a top choice among musicians.

One of the standout features of the V32H is its all-tube circuit design, utilizing two 6L6 power tubes and three 12AX7 preamp tubes. This configuration delivers rich, warm tones and exceptional dynamics, making it ideal for everything from crisp cleans to saturated crunch. The amp also incorporates a unique variable wattage control, allowing players to switch between 32 watts and a lower, more saturated output for cranked-up tube overdrive at manageable volumes. This feature ensures that players can achieve the sweet spot of tube saturation without overwhelming their surroundings.

The V32H is equipped with two channels: Clean and Overdrive. The Clean channel offers a pristine, bell-like tone with a dynamic response, perfect for jazz, blues, and rock. The Overdrive channel features adjustable gain, allowing for everything from subtle breaks to aggressive, high-gain tones suitable for hard rock and metal. Each channel has its own EQ controls, consisting of bass, middle, and treble, providing musicians with the tools to shape their sound to perfection.

Moreover, the amp includes a built-in reverb, adding depth and ambiance to the overall tone. This feature can be adjusted to taste, enabling players to enhance their sound without requiring external effects. The amp also has a series effects loop, allowing for integration with other pedals and effects, making it even more versatile for live performances and studio work.

Additionally, the V32H is designed with high-quality components, ensuring reliability and longevity. The rugged construction is built to withstand the rigors of touring, while the stylish aesthetics contribute to its professional appeal. With its powerful sound, flexible features, and durable build, the Crate Amplifiers V32H stands out as an exceptional choice for guitarists looking for a reliable and high-performing amplifier head. Whether at home, in the studio, or on stage, the V32H delivers an unparalleled tonal experience.