JL Audio Fathom IWSv2-SYS-113 Owner's Manual page 18

Unbalanced Inputs
The Fathom IWSv2 subwoofer amp features individual left and right
unbalanced RCA-type input connectors. These are the most commonly used
connectors for home audio applications and must be used if your receiver or
preamplifier/processor does not provide balanced outputs. While unbalanced
connections are not as noise-immune as a balanced connection, Fathom IWSv2
subwoofers employ ground isolation on the unbalanced inputs to minimize the
possibility of noise in your system.
For systems with a mono subwoofer or "LFE" channel connection, only
the RCA-type jack labeled "Left or Mono" will be used. This applies to most
modern multi-channel receivers and preamplifier / processors. Separate left and
right RCA-type input jacks are provided for systems without a dedicated mono
subwoofer connection. This typically applies to two-channel audio equipment.
Technical Notes:
• When balanced outputs are not available on the signal source, you must use
the RCA-type unbalanced inputs. Fathom IWSv2s feature ground isolation
circuitry on the unbalanced inputs to minimize the likelihood of ground
loop induced noise. Unbalanced input impedance is 50 kohms.
• Connections are industry-standard for unbalanced signal cables as follows:
RCA-type connection:
Tip: Positive
Sleeve: Negative
IMPORTANT: IF NOISE EXISTS AFTER CONNECTION, FATHOM IWSv2 AMPS
ALLOW FOR GROUNDING OR ISOLATION OF THE UNBALANCED INPUTS.
PLEASE REFER TO THE "INPUT MODE SWITCHES" SECTION ON PAGE 19 OF
THIS MANUAL FOR FURTHER INFORMATION ON MINIMIZING NOISE.
Page 18
IMPORTANT
| Fathom IWSv2