ART S8 User Manual
Eight Channel High Performance Microphone Splitter
Use the S8 to split eight balanced low impedance microphone signals into sixteen balanced low impedance microphone signals (eight pairs). Each channel
of the S8 provides one direct output and one transformer isolated output from a single microphone. Applications include sending the direct outputs to the
main or FOH (Front Of House) mixer, and the second isolated outputs being sent to a monitor or recording mixer. The direct outputs pass phantom power
from the main mixer to the microphones for use with condenser microphones.
The S8 includes a ground-lift switch on each isolated output to reduce noise due to ground loops between connected equipment. For versatility the S8 also
features an attenuator pad switch on each input that can be used to connect preamplified signals to the two microphone-level S8 outputs on each channel.
Typically, preamplified signals would originate from instrument preamplifiers, mixers, keyboards, etc.
Rack mounting ears are reversible for flexibility in system cabling. The 19” 1U black all steel case and its all passive design allow the S8 to provide years of
trouble free service.
SPECIFICATIONS:
NOTE: All measurements made from TRANSFORMER ISOLATED MICROPHONE OUTPUT with PAD SWITCH out (off) and 150 Ohm balanced source
feeding MICROPHONE INPUT and 1K Ohm load connected to TRANSFORMER ISOLATED MICROPHONE OUTPUT to simulate a typical “real world”
microphone and mic preamplifier.
• FREQUENCY RESPONSE:
20 Hz to 20K Hz, ±0.25 dB @ -15 dBu, -3 dB at approximately 165K Hz
• TOTAL HARMONIC DISTORTION:
Less than 0.26% from 20 Hz to 20K Hz at –15 dBu input
Less than 0.1% from 45 Hz to 20K Hz at –15 dBu input
0.002% Typical at 1K Hz, –15 dBu input
• PHASE RESPONSE:
Less than 10 degrees at 20K Hz (ref. 1K Hz)
• INPUT IMPEDANCE:
Greater than 1.1K Ohms at 1K Hz (Typical driving source impedance is 150 Ohms)
• OUTPUT IMPEDANCE:
Less than 255 Ohms at 1K Hz (Typical output load impedance is 1K Ohms)
• COMMON MODE REJECTION RATIO:
Greater than 105 dB @ 60 Hz, Greater than 80 dB @ 3K Hz
• VOLTAGE INSERTION LOSS:
Approximately 2 dB at 1K Hz
• MAXIMUM INPUT LEVEL FOR 1% THD:
-1.4 dBu at 20 Hz, +3.5 dBu at 30 Hz, +9.4 dBu at 50 Hz
• DIMENSIONS:
1.75”H x 19”W x 3.75”D (44.5mm x 482.6mm x 95mm)
• WEIGHT:
3.75 lbs. (1.7 kg)
Ref: 0 dBu = 0.775 VRMS
USAGE:
Connect low impedance dynamic or condenser microphone to any MICROPHONE INPUT on the S8.
(Alternatively connect line level signal to any MICROPHONE INPUT and engage corresponding front panel INPUT PAD switch.)
Connect corresponding DIRECT MICROPHONE OUTPUT to mic input on main mixer (switch phantom power on at mixer if desired).
Connect corresponding TRANSFORMER ISOLATED MICROPHONE OUTPUT to mic input on secondary mixer or recording system.
Set GROUND switches to LIFT or GND. Use whichever setting provides lowest noise performance.
NOTE: The chassis ground connects to the Channel One input ground only, in order to reduce the possibility of channel crosstalk through chassis ground.
To provide the noise-shielding benefit of the chassis enclosure when the S8 is not mounted in a grounded rack system, be sure to use the Channel One
input when using fewer than eight channel input connections.
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