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Manual-1

OPERATORS  MANUAL

SM 26B

SPLITTER MIXER

SM 26B CONNECTION

When connecting the SM 26B to other components in

your system for the first time, 

leave the power supply for last

.

This gives you a chance to make mistakes and correct them
before damage is done to anything fragile.

As you have no doubt noticed, all Inputs and Outputs on

the SM 26B’s rear panel are ¼" connectors. The Inputs and
Outputs are active balanced on Tip-Ring-Sleeve (TRS) jacks
which allow the flexibility of connecting in either a balanced
or unbalanced fashion. If unbalanced operation is your
preference, the simplest way to accomplish this is through the

use of tip and sleeve ¼" connectors. The ring is not essential
unless balanced operation is required. You should be aware
that if you are running unbalanced and using TRS connectors
with both ring and tip, the ring and sleeve must be shorted
together. Failure to do so on the inputs results in a gain loss of
6 dB.

Balanced operation requires that TRS plugs be used. The

tip is hot (+), the ring is return (–) and the sleeve is ground.
RaneNote 110, “Sound System Interconnection” (included
here) contains some great pictures to aid your interconnect
ventures.

QUICK START

Realizing that in most areas there are laws against reading owners manuals, and that reading them under the blankets at

night with a flashlight makes you feel stupid, we therefore provide this brief, yet informative, description of how to use the
SM 26B just in case your batteries are low and your mother is about to come in the room.

To achieve a quick understanding of the SM 26B, think of it as a six channel mixer with faders and pans only. Or think

of it as a 2-to-6 channel splitter with output level controls and a mix knob (to control how much of which input goes to
which output). If you get that, you may stop here as long as you know how to hook up the power supply.

As a six channel mixer, 

MONO IN 1

 through 

6

 may be placed on the Right or Left bus or both, in any amount. The

respective 

LEVEL

 knobs on the front of the unit serve as the mixer’s faders, the adjacent 

PAN

 controls place the channel’s

signal into the stereo field. As an effects mixer or line level expander for a larger mixer, set up the 

LEVELS

 and adjust the

PANS

. The 

MASTER OUTPUT LEVEL

 adjusts the overall level of the mix at the Master Outputs.

As a splitter, place one or both input signals into the 

LEFT

 and/or 

RIGHT

 Inputs. Select the Input(s) to be placed at

each of the six 

MONO OUTs

 by rotating the 

MIX/PAN

 control to the proper position. Set the individual 

CHANNEL

LEVEL

 controls for proper output level. The 

MASTER INPUT LEVEL

 control on the front adjusts both Right and Left

Input signal levels together.

Never connect anthing except an RS 1 or other approved Rane AC power supply to the red thing that looks like a

telephone jack on the rear of the SM 26B.

 This is an AC input and requires some special attention if you do not have an

operational power supply 

exactly

 like the one that was originally packed with your unit. See the full explanation of the

power supply requirements elsewhere in this manual.

Summary of Contents for SM 26B

Page 1: ... just in case your batteries are low and your mother is about to come in the room To achieve a quick understanding of the SM 26B think of it as a six channel mixer with faders and pans only Or think of it as a 2 to 6 channel splitter with output level controls and a mix knob to control how much of which input goes to which output If you get that you may stop here as long as you know how to hook up...

Page 2: ...annel When fed from the MONO IN jack each stage has a gain range from Off to 12 dB minimum allowing level matching of 10 dBV equipment to 4 dBu gear When fed via the LEFT RIGHT INPUT s these CHANNEL LEVEL controls automati cally limit to a maximum of unity gain to accommodate the 12dB available from the Left Right Input gain stages 5 MIX PAN controls These serve two different functions MIX When us...

Page 3: ...ng and sleeve are shorted anywhere in the chain by using a mono plug the entire line becomes unbalanced 3 MONO INPUTS These are TRS jacks which accept either balanced or unbalanced mono signals These are switching jacks which automatically bypass the Master LEFT RIGHT INPUTs whenever a plug is inserted see the Block Dia gram Follow wiring conventions as in 1 4 MONO OUTPUTS These TRS jacks deliver ...

Page 4: ...ly is an AC supply which is a 18 24 volt center tapped transformer capable of supplying the current demanded by this product Using any other type of supply may damage the mixer and void the warranty CHASSIS GROUNDING If after hooking up your system it exhibits excessive hum or buzzing there is an incompatibility in the ground ing configuration between units somewhere Your mission should you accept...

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