About Acoustic Feedback, Phantom Power FAQs

Owner's Manual

About Acoustic Feedback

Feedback usually occurs in the lowest octave of your instrument, gen- erally with two notes about a half step apart. The lower type of feedback (cavity resonance) starts when the sound pressure coming out of the speakers excites the resonant air chamber inside your instrument. We have found that it is effective to tune out an instrument’s cavity reso- nance feedback with the Anti-Feedback (notch filter) in the Loudbox

100.For acoustic guitar this occurs at G# on the low E-string, or at about 100Hz. Turn the Anti-Feedback knob to about 11 o’clock to dial out this resonance. Note that the circuit can be effectively defeated by moving the dial to the OFF (7 o’clock) position.

The higher range of feedback (top resonance) usually starts about a half or whole step above cavity resonance of the instrument. Top resonance feedback happens when the sound pressure coming off the speakers excites the resonant frequency of the soundboard of your instrument. For acoustic guitar this occurs at A and above on the low E-string. Push the Phase switch in and out until you find the position that subdues top resonance feedback.

Anti

Feedback

Lower

Feedback Range

(E to G#)

OFF

UpperPhase Feedback Range

(A and above)

Phantom Power FAQs

Q:I have heard 24V phantom power can damage some audio devices. True?

A:Yes, phantom power can damage the following:

1.An unbalanced dynamic mic that has been modified for XLR.

2.A balanced line-level device that is not designed to accept phantom power (ex: some effects processors). Contact the manufacturer to confirm compatibility.

3.Some older balanced wireless receivers can be damaged by phantom power. Consult the manufacturer of the wireless unit for compatibility.

4.An instrument preamp or stompbox with an unbalanced output that is modified for XLR.

Important Note: Turn off phantom power if you plug any of the above into the XLR input.

Q: Which devices are safe with 24V phantom power?

A: All the following can be used safely with phantom power:

1.All balanced condenser microphones.

2.All balanced dynamic microphones.

3.Many new wireless units. Check with the manufacturer for compatibility.

4.A preamp/DI designed for phantom-power operation, such as the Fishman Pro-EQ Platinum.

Loudbox 100 specifications

The Fishman Loudbox 100 is a premier acoustic amplifier designed for musicians seeking high-quality sound and versatility in a portable package. This amplifier is ideal for singer-songwriters, guitarists, and performers who need a reliable, powerful solution for practices, performances, or casual jam sessions. With its user-friendly features and innovative technology, the Loudbox 100 is trusted by musicians across various genres.

One of the standout features of the Loudbox 100 is its power. Delivering 100 watts of clean, rich sound, it provides ample volume for small to medium-sized venues, ensuring that every performance can be heard clearly. The dual-channel design allows artists to connect both an instrument and a vocal microphone simultaneously, making it perfect for full acoustic performances.

The amplifier is equipped with Fishman’s advanced circuitry that enhances the natural tone of acoustic instruments. This technology ensures that the sound remains warm and balanced, preserving the nuances of the original instrument. The Loudbox 100 also features built-in reverb and delay effects, giving musicians the ability to add depth and texture to their sound, tailored to individual styles.

Another notable characteristic is the robust set of controls available for each channel. Musicians can easily adjust gain, EQ, and effects to suit their performance needs. Each channel comes with a 3-band EQ, allowing for precise tonal shaping and optimization of sound. Additionally, the amplifier includes an aux input, enabling users to connect external devices such as smartphones or tablets, perfect for playing backing tracks.

Portability is a significant advantage of the Fishman Loudbox 100. Weighing in at just under 30 pounds, it features a rugged design with sturdy construction, making transportation easier for musicians on the go. The built-in handle adds an extra layer of convenience, allowing for easy carrying to gigs and rehearsals.

In summary, the Fishman Loudbox 100 is an essential tool for any acoustic musician, combining power, versatility, and portability. Its advanced technology, user-friendly controls, and exceptional sound quality make it a favorite among performers looking for an amplifier that can keep up with their creativity and style. Whether for live performances or rehearsal sessions, the Loudbox 100 stands out as a reliable and high-performing acoustic amplifier.