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ROLLS  ADB2   (ADB2)
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  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  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.
 
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