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App 514-721-1518   
The Rolls ADB2 is powered by standard microphone phantom power from 9 to 48 VDC and uses a discrete low-noise differential driver to make it very quiet. The Rolls ADB2 has two 1/4" input jacks wired in parallel, a male XLR output and a 3 position attenuator and ground lift switches.
Input -10 to +40 dB unbal
Output: -10 to +2 dB bal XLR pin 2+
Bandwidth: 1-50K Hz
S/N Ratio: 100 Db
Jacks (2) 1/4" phone, XLR Male
Attenuation: 0 dB, 20 dB, 40 dB
Phantom Power: 9 to 48 VDC
Size 2" X 3.5" X 1.23"
ROLLS  BC17   (BC17)
App 514-721-1518   
The BC17 attaches to the back of a PM50s, PM50sOB, or PM351 to provide mobile use of those units. A screw is provided to attach to the back of the Personal Monitor unit.
ROLLS  CS1000   (CS1000)
App 514-721-1518   
CS1000 Cable Scanner The CS1000 is a price/performance breakthrough in the cable maintenance, signal testing market. It tests ten different types of cable ends. Each cable being tested has its pinout scanned for continuity as well as proper polarity. Plus, the unit features a 1 kHz Test Tone oscillator with a calibrated variable level control. The balanced test signal is sent out each of the jacks on one side of the unit providing a convenient way to verify proper operation of audio equipment. It can be heard through headphones and has enough level to hear through a speaker. The RJ jacks allow ringing out phone lines and other installed wiring. The CS1000 also features Phantom Power Voltage and polarity (both signals present) testing as well.
ROLLS  CT1   (CT1)
App 514-721-1518   
Any Musician or sound person knows how difficult it is to maintain cables. The CT 1 provides an efficient way to detect shorted or open cables. The unit tests 1/4" TS, 1/4" TRS, RCA, XLR and MIDI cables. Plus - it will test combinations of the above. This unit is a MUST-HAVE.
ROLLS  DB14b   (DB14b)
App 514-721-1518   
The DB14b is a special purpose direct box for applications where a stereo source signal can be separated, and individual volume controls used for each track such as an AV presentation from a laptop computer, or a rehearsing choir to a music track. It has stereo RCA and 1/8" inputs, 2 volume controls, RCA and XLR outputs, and uses no power.
ROLLS  DB24   (DB24)
App 514-721-1518   
introducing the new DB24 Stereo Direct Interface. This unit is a two channel isolation device designed to connect high impedance devices to low impedance. The unit is completely passive, and utilizes Rolls proprietary audio transformers for superior sound. A heavy duty steel chassis was chosen to provide maximum reliability when used in demanding live sound reinforcement applications. A variety of inputs are provided including stereo and mono 1/4", stereo RCA, and stereo 1/8" (3.5mm). The DB24 is an ideal impedance matching device for connecting any unbalanced stereo signal to a balanced system. Consumer audio equipment such as CD players, DVD players, MP3 players, etc., may be easily connected to a professional audio system.
ROLLS  DB25b   (DB25b)
App 514-721-1518   
The DB25b is a transformer balanced, passive direct box. It features a Ground Lift switch for hum elimination, and an Attenuator control for padding the input signal from -20dB to -infinity dB. Padding the input signal provides a way to connect the DB25b to a line level signal, even a speaker level signal and connecting it to a balanced line or Mic input on a mixer. The two 1/4 inch; inputs are paralleled pass-throughs to also send the input signal to a tuner, pre amp, etc..
ROLLS  HE18   (HE18)
App 514-721-1518   
The HE18 is a two channel audio hum and buzz remover. Everyone knows how annoying it is to have 60 cycle hum in your sound. Now you can eliminate virtually all ground hum and buzz by simply inserting the HE18 into the audio path. Plus, the unit will convert an unbalanced signal into a balanced signal, and vice-versa. This greatly improves overall noise performance.
ROLLS  HR31   (HR31)
App 514-721-1518   
Half Rack Mounting Panel
2 of these brackets attach to the HR72,73,78 to allow those units to be rack mounted. These only work with those 3 HR units
ROLLS  MB15B   (MB15B)
App 514-721-1518   
"Promatch" 2-way +4/-10 Converter
The MB15 ProMatch converts consumer level stereo RCA signals to balanced XLR professional line level, and back. One side of the unit, labeled 1, has two XLR inputs and stereo RCA outputs. The other side labeled 2, has stereo RCA inputs and two XLR outputs. Each side has stereo level controls, and an LED indicates that power is applied to the unit. An additional benefit of the MB15 is that it will act as a balanced XLR line level control. By adding a stereo pair jumper between the four RCA jacks (connecting ins to outs), the two Level controls may be inserted into any balanced XLR line.
ROLLS  MO2020   (MO2020)
App 514-721-1518   
Test Tone Oscillator
The MO2020 provides a sine and square wave output on two 1/4" jacks. The frequency range is variable from 20Hz to 24kHz, it accepts a 1.2 to 5 volt dc input on a 1/4" jack for external frequency control, and a 10 dB Output Pad is included to provide a -10 dB reference signal.
ROLLS  MS20c   (MS20c)
App 514-721-1518   
The MS20c Splitter / Combiner / Isolator will split a single balanced XLR signal into two isolated signals, combine two balanced XLR signals together into a single, or simply isolate a balanced line for buzz or hum elimination. Please note that when combining two condenser microphones, phantom power voltage is passed to only one of the microphones due to the internal isolation transformer.
ROLLS  SLC19   (SLC19)
App 514-721-1518   
Stereo Level Control