Overview: FrOnt Panel
The SUBWAY D-800+ begins with the front panel input section, which is comprised of the INPUT jack, MUTE switch, ACTIVE/PASSIVE
switch, DEEP switch and BRIGHT switch. The INPUT jack feeds a high impedance monolithic J-FET input amplifier which provides
appropriate loading to the pickup, and isolates the switching circuitry from the high impedance signal path. The MUTE switch silences
the signal from the INPUT jack to the SPEAKER output, HEADPHONE output and DI output for silent tuning with a tuner connected in
line with the instrument or to the TUNER OUTPUT jack. The ACTIVE/PASSIVE switch sets the gain of the input preamplifier, reducing
gain in the active position to prevent unwanted distortion. A DEEP switch and BRIGHT switch are provided to allow for classic preset
voicing options. Tally (indicator) LEDs are provided for all switched functions.
The preamp section includes a precision variable 4 pole HIGH PASS FILTER to block unwanted sub-sonic signal as well as for specific
tone shaping functions, feeding a monolithic J-FET variable GAIN stage using carefully tuned anti-saturation technology to prevent
momentary sticking to the supply rails, instantaneous recovery and a more tube-like feel when driven hard into non-linear territory.
An O/L (overload) LED is provided to give visual indication of when the preamp is being overdriven.
Tone shaping on the SUBWAY D-800+ includes a VOICING control that modifies the amplifier’s response from a more flat like curve
to a more vintage curve by modifying and shifting the frequency response in all regions with a simple turn of the knob. The signal
then feeds the 4 BAND EQUALIZATION section which consists of a LOW FREQUENCY shelving band, 2 sweepable MIDRANGE
FREQUENCY peak/dip bands, and a HIGH FREQUENCY shelving band. It is suggested that you first experiment with the VOICING
control to “rough in” the overall response that you are looking for, and then adjust the 4 band EQUALIZATION to “polish up” the tone.
Finally, there is a MASTER volume control which sets the volume after the equalization. The combination of positions between the
INPUT and MASTER volume, along with the signal strength from your bass (which is also affected by your playing style and touch)
allows for a wide range of tones, from shimmering clean to moderately overdriven and everything in between.
Overview: rear Panel
On the rear panel, you will find the power switch, and the AC mains inlet on a standard IEC “C14” connector. The SUBWAY D-800+
contains an auto-ranging universal power supply that can take anywhere between 100-120 volts & 220-240 volts AC, 50/60Hz with-
out the need for a fuse change. This feature makes these amps ideal for the international touring musician who plays in a variety of
global regions. The only thing necessary to make the amp work is a correct power (mains) cable that matches the power source. It
is important for the mains power to be grounded/earthed for safety as well as EMC/EMI reasons.
Next are parallel connected NL-4 SpeakOn™ connectors, which are wired with the amplifier positive to terminal “1+” and the amplifier
negative to terminal “1-“. All cables with NL-2 connectors (2 pole) will be wired this way. There is an IMPEDANCE SELECTOR switch
provided to properly match the power amplifier to the load. When driving a load less than 4 ohms (like 2.66 ohms or 2 ohms), set the
impedance switch to the 2 ohm position.
The SUBWAY D-800+ is equipped with a HEADPHONE output, which will drive all common headphones and IEM ear pieces between
8 and 32 ohms. It’s advisable to use caution whenever sticking a sound source in your ear as damaging volume is possible, especially
when volume is factored over a long period of time. There is a MUTE footswitch jack that mutes the signal when the tip is shorted to
the sleeve. Note that the front panel mute switch must be in the down position for this function to operate. A serial master EFFECTS
LOOP (SEND & RETURN), an AUX input, and a TUNER output rounds out the rear panel features.
A feature that sets your new SUBWAY D-800+ apart from the rest of the market is the inclusion of a studio grade XLR balanced DIRECT
OUTPUT, complete with PRE-EQ/POST-EQ signal routing switch, MIC/LINE level switch, and pin 1 GROUND LIFT switch. Circuit
attributes include full phantom power protection, high RFI immunity and extreme tolerance to reasonable ground potential differences.
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