MR100 Stereo Preamp

MR100 preamp with VC201 digital keypadKnoll has been making stereo and multichannel amplifiers since the early 1990's and since then customers have been asking for a simple to use preamp for use with stereo amplifiers. The MR100 is a deluxe, easy to use two piece stereo preamp with all the features needed for home, commercial and industrial installations. The MR100 features control of bass, treble and balance, with the digital keypad controlling volume, mute/unmute and the connected amplifier power on/off via the 12 VDC trigger. The keypad has six led volume level indicators.

Once installed the MR100 can be hidden and the VC201 digital keypad controls the system. To turn the connected amplifier on, the user pushes the digital keypad up or down paddle and the system turns on to a preset volume. To adjust the volume push the up or down paddles. To mute push the center of the paddles. To unmute press either the up or down volume paddle. To turn the whole system off press the down paddle until the lowest led blinks and the system is off. It’s that easy...

When using Knoll multichannel amplifiers with the MR100, the relative volumes in each area or room can be individually set on the connected amplifier and the MR100 adjusts the "overall" volume.

Typical MR100 layout

Figure 1: Typical Connection

MR100 Specifications:

MR100 Module

Inputs: Gold stereo line level jack

Outputs: Gold stereo line level jack; 12 VDC trigger 3.5mm jack

Frequency Response: 20 Hz - 20 kHz +/- 1 dB

Power: 12 VDC power adaptor, 500 mA

Functions: Continuously adjustable bass, treble and balance

Dimensions: 2.65" x 2.9" x 1.1" h (67 x 74 x 28 mm)

Keypad: VC201 digital keypad

VC201 Keypad

Wire Length: Can be connected to MR100 with CAT5e wire up to 1000' (300m) with RJ45 termination

Power: Supplied by MR100

Dimensions: 4.1"h x 1.4" w x 2.0"d (decora style 104 x 36 x 51 mm)

Indicators: Six leds indicate selected volume

Functions: Volume up/down, mute, power on/off


         MR100/VC201 manual...