Specifications

OPERATION

CONFIGURING THE 1/4” INPUT JACKS AS DIRECT OUTPUTS

The eight 1/4” Input jacks come from the factory configured as line inputs and are electrically mixed with the XLR jacks. They may be used together if desired. To configure a channel’s 1/4” jack as a Direct Out, first remove the RM83T lid.

For each channel there are dual three-pin headers with shorting jumper on two pins. The setting from the factory is on “IN”. By moving the shorting jumpers to the configuration shown as “OUT” (one jumper up, the other down), the jack then becomes a Direct Output.

CONFIGURING THE 1/4” INPUT JACKS AS INSERTS

To configure a channel’s 1/4” jack as an Insert, first remove the RM83T lid and locate the corresponding channel’s dual three-pin header. Move both shorting jumpers down as shown below as “INSRT”, the jack then becomes an Insert.

RM83T

Eight Channel Mic Mixer

1	2	3	4		5	6	7	8		MASTER	TRANS BALANCED
											TRANS BALANCED
				1/8”							MIC MIXER
MADE IN USA				1/8”							RM83T
MADE IN USA											RM83T
www.rolls.com											pwr
+20	+20	+20	+20	STEREO	+20	+20	+20	+20	0	10	pwr
LEVEL TONE	LEVEL TONE	LEVEL TONE	LEVEL TONE	INPUT	LEVEL TONE	LEVEL TONE	LEVEL TONE	LEVEL TONE		LEVEL

Direct Insert Input

Output

CONFIGURING THE OUTPUT FOR MIC OR LINE LEVEL

The RM83T ships from the factory with the XLR Main Output configured as Line Level (+4 dB). To change this to Mic Level (-10 dB), carefully remove the lid, locate the Mic/Line header which is near the Main Output jack. Move the two jumpers from the Line Level position (shown below on the right), to the Mic Level position (shown on the left).

Mic Line

Level Level

JUMPER DEFAULTS

The internal jumpers are conﬁgured from the factory as follows: 1/4” = INPUTS

MAIN OUT LEVEL = LINE LEVEL

ROLLS CORPORATION

6 75889 00830 2SALT LAKE CITY, UTAH 4/11

Input Impedance:	Mic:	600 Ω XLR balanced
	1/4":	10K Ω unbalanced
	Bus Input:	10K Ω unbalanced
Max Input Level:	Mic:	+4 dBV balanced
	Line:	+22 dBV
Input Connectors:		8: XLR, 8: 1/4" (Line), 1: RCA (Bus input)
Outputs:		XLR bal., RCA unbalanced Prefade out
Max Gain:	Mic:	60 dB
	Line:	35 dB
Tone Control:		12 dB Treble/Bass cut
Phantom Power:		+48 VDC
Output Level:		+22 dBV max
Output Impedance:		51 Ω
Phase Shift:		<10 degrees, 20Hz to 20 kHz
Max S/N ratio:		106 dB
THD:		<.01%
CMRR:		>120 dB (Mic)
Size:		19" x 1.75" x 6"
		(48.3 x 4.5 x 15 cm)
Weight:		6 lbs.

DIP SWITCH DEFAULT SETTING:	ALL OFF
JUMPER DEFAULT SETTING:	1/4” JACKS AS INPUT

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