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B. POWER CONNECTION
The L-8500 OTL/OCL uses a standard three prong male 15 amp IEC connection for AC input. You
need to use a power cord with a female three prong 15 amp IEC connector at one end.
To the left of the IEC connector (facing the left side of the unit as in Figure 1), there is a power
on-off switch. Leave this switch in the OFF position – that means the switch is pressed “down”
at the bottom - while you make all initial connections.
The L-8500 OTL/OCL you have purchased is set internally for AC 110/120 volt – 60 HZ, or
220/230 volt – 50 Hz operation. There is no way to change this to another AC setting without
return of the unit to the factory for re-wiring, at the owner’s cost, including transport both
directions.
C. INPUTS
There are five (5) inputs. Line 1 and Line 2 are balanced connections (XLR type connectors). The
remaining three (3) line inputs are RCA type, single-ended connections. None of the inputs is
intended especially for connection to any particular device (see Figure 2).
NO PHONO STAGE - The L-8500 OTL/OCL is a line-stage preamplifier and does NOT have a built-
in phono preamplifier section. You will need a phono preamplifier if you want to use a turntable
with the L-8500 OTL/OCL. You can connect your phono preamplifier to any of the five inputs,
provided you have the appropriate types of connections or adaptors.
The L-8500 OTL/OCL has been designed and manufactured to work most synergistically with
Allnic Audio phono preamplifiers, pre-preamplifiers, equalization and power amplification
products, and ZL Technology cables.
D. OUTPUTS
The L-8500 OTL/OCL has three pairs of outputs. One (1) pair is single-ended unbalanced, using
RCA type connectors; two (2) output pairs are balanced (i.e., separate ground), using XLR
connectors (see Figure 2). Only the RCA unbalanced connectors are directly coupled to the
12B4 output stage, so only the RCA outputs are "pure" OTL/OCL. The balanced XLR output
connectors are coupled to a pair of permalloy output transformers. We recommend trying both
as you might prefer one over the other.
You may use the balanced and single-ended RCA outputs at the same time; for example, if you
run one pair to your stereo amplifier and the other pair, or pairs, to a powered subwoofer or a
pair of them.
