Frequently Asked Questions

A source is stereo or mono program material such as an AM/FM Tuner, CD Player, Video Player, MP3 player etc. "Source" is a source of program material.

Does your application call for a mono or stereo setup? Most often in installation applications such as restaurants, clubs, bars, schools, and churches; the outputs are configured in mono because a stereo image is usually lost anyway and stereo music does not sound good if you can really only hear one side. All Rolls mixers and mixer/amplifiers either have a stereo/mono feature, or are configured for mono operation only. Rolls products give you the choice for your particular environment.

Phantom power refers to a device that is not powered by a power cord or battery or a conventional power supply. Usually it is part of the connecting cable to the device and a powered device appears to have no external power or "phantom power". A "Condenser" type microphone requires power in order for it to work. Many have places inside the microphone for batteries. All condenser microphones should operate on Phantom Power which is simply a voltage that runs from the mixer down the microphone cable and to the microphone. This eliminates the hassle of changing batteries. All Rolls mixers and mixer/amplifiers provide phantom power. You may have heard an old industry standard voltage for phantom power of 48 volts. While this may be true, most condenser microphones will operate on 9 to 12 VDC of phantom power. Rolls mixers and mixer/amplifiers use 12 to 48 volts depending on the model #. With phantom powered Mic's the important thing for proper operation is usually current, not voltage. Even though the phantom voltage of a Rolls product may be 12V the circuit is made to deliver the same current (amps) as a 48V system. It is important to note that very few devices still have to have 48 volts in order to draw enough current.

An important factor in your application may be space; specifically rack space. The Rolls Mixer/Amplifiers were designed with this in mind. The MA1705 and MA2355 require only a single rack space, and the MA2152 uses two rack spaces. Compare this to three or even more rack spaces taken by individual mixers and amplifiers. Once again though, necessity will make the determination. A separate Mixer and amplifier is usually desirable if size, budget and user expertise are not a consideration.

TRS is pro audio speak for "Tip Ring Sleeve", the 3 connections on a stereo plug. The tip of the plug is the TIP. It is usually the Left channel in stereo connections The metal ring between the sleeve and the tip is the RING, the right channel The metal sleeve behind the RING is the SLEEVE and is usually the ground connection.

For a dealer referral outside the USA or Canada please contact us directly at rollsorders@gmail.com

No, we opted for reliability rather than a fictitious hazard posed by our circuit boards. NASA and government entities do not allow lead free solder in mission critical products for reliability reasons. Lead free solder causes shorts and failures especially as time passes. At Rolls we have been scrutinized by OSHA twice for possible lead contamination and received clean findings both times. Also all materials used in making Rolls products are in compliance with current manufacturing standards. WARNING: The solder used in Rolls products contains lead, a chemical known to the State of California to cause birth defects and other reproductive harm. Please wash hands after handling internal components and circuit boards and avoid inhalation of fumes if heating the solder. Always a wise precaution.