Quick Start Guide
RNLAQuickstartV050 Page 11 of 12
www.fmraudio.com FMR Audio, +1-512-280-6557
Figure 2: RNLA Rear Panel Connections
# Control Description
1
Left Channel Input — This 1/4” connector accepts unbalanced, single-ended output signals 
from other devices. There are two modes this jack may operated in: (1) “standard” input rout-
ing into the RNLA with a standard 1/4” Tip-Sleeve (TS) plug, or, (2) “insert” routing to/from 
the RNLA with a 1/4” TRS plug wired with TIP = Input signal to RNLA, RING = RNLA Left 
Channel output and SLEEVE = reference.
2
Left Channel Output — This 1/4” connector presents the left channel audio output from the 
RNLA in an balanced, single-ended format. When operating in “insert” mode, no plug should be 
inserted in this connector. This will disable the return signal on the INPUT/INSERT jack. In 
“normal” mode, however, this jack should be used to connect to downstream devices.
3
Right Channel Input — This connector functions analogously for the right channel as 
described above for the left channel.
4
Right Channel Output — This connector functions analogously for the right channel as 
described above for the left channel.
5
Sidechain Insert — The SIDECHAIN is where the control rules are determined for the RNLA. 
This jack allows this signal to be interrupted and further processed (e.g., using an equalizer in 
the SIDECHAIN signal can be used to make a frequency-sensitive compressor, like a “de-
esser”). The SEND from the RNLA SIDECHAIN is on the TIP of this connector while the 
RETURN is on the RING. The SLEEVE is the reference. A plug should only be inserted into this 
jack if the circuit is completed elsewhere, otherwise the RNLA won’t have the SIDECHAIN sig-
nal that is necessary to compress.
6
2.1mm coaxial power connector — This connector allows the 9VAC transformer to power the 
RNLA. The wallwart must be a 9V *AC* output variety or the RNLA will fail to pass audio.
Tip = In
Ring = Out
Tip = In
Ring = Out
Tip = In
Ring = Out
Right
Power
IN
9VAC
500mA
IN
Left
(or Mono)
OUT OUT
Sidechain
1 2 3 4 5 6










