LIMIT LED
This amber LED indicates that the power amp is nearing maximum power and is entering the soft clip/limit output
tube emulation mode. Soft clip/limit output tube emulation mode mimics many of the desirable characteristics of tube amp output
stage overdrive while eliminating the common solid state clipping artifacts. There is approximately 6dB of range on this circuit, driving
beyond this, of course, will cause gradual output stage clipping. It’s acceptable for this amplifier to operate in output stage overdrive
mode (if that’s the tone you are after) with the LED flashing roughly 25% of the time on.
REAR PANEL (CONTROLS & FEATURES)
POWER SWITCH
This switch is used to turn your amp on and off by disconnecting the amplifier from the power source. This
amplifier complies with the new EU Eco-design directive by providing a switched “0.00 watt power consumption off-mode”.
IEC POWER INLET
This power inlet conforms to the IEC C-14 type standard, and is used with a corset containing a matching
connector, and appropriate plug for the intended Country’s AC requirements. The power supply is internally monitored by supervisory
protection circuits and thus contains a non-user replaceable fuse that opens in the event of a major failure. The amplifier is designed
to be used with grounded or earthed power, meaning that the chassis is always maintained at ground/earth potential even in the
event of a gross failure within (or external to) the amplifier. Never remove the grounding/earthing pin from the power plug, or alter
the power cable in any way.
SPEAKER OUTPUTS
The SUBWAY D-800 is rated to drive a minimum 2 ohm load (with the impedance selector switch set in
the 2 ohm position), meaning either 4 x 8 ohm cabinets or 2 x 4 ohm cabinets. The amplifier incorporates a pair of SpeakOn™ NL4FC
connectors wired is parallel that mate with either NL-2MP or NL4-MP plugs. Cables using NL-2 plugs contain only 1+/1- terminals
and will always be correctly wired for use with the amplifier, but cables using NL4 connectors come with different wiring configura-
tions. If using cables with NL-4 connectors, they may be constructed with standard 2 wire cable and they must be wired 1+ to 1+ and
1- to 1-. 4 wire cables are fine as well, terminals 2+ and 2- are not used. The cables to avoid are what are called NL4 bridge mode
cables, which are typically 2 wire, and wired 1+ to 1+ and 1- to 2+, these SHOULD be clearly marked but sometimes they are not,
so be aware of the possibility. Why SpeakOn™ cables and not the “old favorite” ¼” (or 6.35mm) connector? Well, there are a couple
important reasons, the first being that with the changes in safety laws globally this amplifier requires “touch-proof connections” in many
markets because it exceeds the threshold for maximum voltage swing. The second reason is because the power amplifier’s internal
topology is BTL (bridge tied load), which means that neither terminal are at ground potential, so touch-proof connectors provided an
added layer of safety to the system.
SPEAKER IMPEDANCE
All speakers will have a “rated nominal impedance”. Impedance is resistance to AC electrical signal
flow which the power amplifier must deliver. The lower the impedance, the greater the current that the power amplifier must provide.
The lowest impedance that the amplifier is capable of driving safely is 2 ohms (with the impedance selector switch in the 2 ohm posi-
tion), which is a parallel connection (the standard connection of virtually all speaker cabinets) either two x 4 ohm cabinets or four x
POWER
HANDCRAFTED IN PETALUMA, CALIFORNIA, U.S.A.
HEAD
PHONES
SPEAKER OUTPUTS IMPEDANCE
AUX
INPUT
SOURCE
POST-EQ
LEVEL
LINE
PIN 1
LIFT
PRE-EQ MIC
2 Ω 4/8 Ω
GROUND
DIRECT OUTPUT
(PHANTOM POWER PROTECTED)
2 OHM MINIMUM LOAD
OFF ON
Do not expose to rain, moisture
or thieves.
Risk of Electric Shock. Do Not Open.
No user serviceable parts inside.
WARNING:
CAUTION:
®
MAX AVG PWR CONSUMPTION 400W
MAINS FUSE: INTERNAL T-6.3A/250V
100V-240VAC
~50/60HZ
INPUT
POWER
h
AMPLIFIER
44YV
400 WATTS / 8 OHM
800 WATTS / 4 OR 2 OHM
RATED
POWER
SUBWAY
®
D-800
™
BASS AMPLIFIER
PAGE 5
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