Klein-hummel K8-AI8 User Manual
K8-AI8
8-CHANNEL LINE AUDIO INPUT TO K8 BUS
KEY FEATURES TECHNICAL SPECIFICATIONS
8 Channel digital audio over Cat5
8 Analog inputs, stackable to max of 16
Drives (2) each 200 meter K8 cabling legs
Extremely low latency
Level trims for professional and consumer inputs
3-LED input level meters
Device identification LED
Input overload LED
Embedded RS-485 control port
PRODUCT DESCRIPTION
The K8 digital audio distribution system transports
professional quality audio across a facility over standard
category 5 cable. It can be used for simple point-topoint connections or can form a distribution backbone
for sending up to 16 audio channels to multiple remote
locations.
The K8-AI8 offers the ability to take 8 analog audio
signals and encode them onto the K8 system. Up to a
total of two K8-AI8 units may be stacked to provide a
total capacity of 16 audio channels on a single category
5 cable.
The system is fast to implement and requires no
configuration. It is easily connected together with up
to 200 meter lengths of category 5 cable. For advanced
applications the entire system may be controlled and
monitored from a single connection via RS-485 or
optionally with Ethernet or USB adaptors.
Frequency Response 20 Hz – 22 kHz
Signal to Noise Ratio >100dB(A)
Input Balanced analog audio, XLR-1/4” female
Input Level +22 dBu peak
Maximum input +22 dBu
Output Two K8 bus outputs, each drives 200 meters
Control RS-485, DB-9 female connector, open
Optional USB adaptor
Optional Ethernet adaptor
Termination Switch 4-position DIP
Digital Audio Format 48 kHz sampling rate, 24 bit, proprietary
Latency ½ millisecond worst case, analog in to
Power Requirements 100 – 240 Volt, 50-60Hz, 15 Watts
Front Panel Indicators Power, signal present, signal nominal level,
Rear Panel Indicators OK, Wink
Weight 7 lbs / 3,2kg
Dimensions EIA Standard 19” rackmount 1.75” high,
Operating Temperature
Range
combo connector x 8
-10 dbV to +4 dBu nominal input level
published protocol 38400 Baud, 8 Data,
1 Stop, No Parity
analog out
IEC power cord connector
signal peak level
8 “ deep
0…70°C
The K8 bus has a total analog in to analog out latency
of 0.5ms making it useable in both distributed and live
performance settings.
K8-AI8
8-CHANNEL LINE AUDIO INPUT TO K8 BUS
APPLICATIONS
For large paging and background music applications pull a single category 5 cable out to each remote amplifier location
or daisy chain from one amplifier room to the next. All locations have access to 16 channels of digital audio without
concern over ground loops or induced noise.
Use K8 as a mini snake for sending audio feeds from an auditorium out a remote broadcast truck.
Mount a K8 device in a cluster of powered speakers and drive the entire cluster with a single category 5 cable.
Use K8 as a digital snake between the mixing console and the amplifier racks. Put another K8 branch and output
device on stage to drive the stage monitors.
Distribute central background music and paging out to individual venue systems in cruise ships, entertainment
facilities, convention centers, schools and conference facilities.
ARCHITECT & ENGINEERING SPECS
The audio transport system shall carry 16 channels of digital audio integrated with bi-directional remote control and
monitoring data over a single category 5 cable up to 200 meters in length without being actively refreshed. The digital
audio format shall be uncompressed, 48kHz sampling rate, 24 bit quantization depth and shall have a total latency from
analog to analog through the transport system of less than 0.5 milliseconds. The system shall pass audio when powered
up with no software configuration required. The input to the digital audio system shall be via an 8 channel analog encoder
with XLR/1/4” female combination connectors mounted in an EIA standard 1 unit rackmount case with universal voltage
power supply. The signal to noise ratio of the system shall be greater than 100 dB and the audio input device shall drive
2 individual category 5 cables to a length of 200 meters. The input device may be cascaded with another input device to
populate all 16 audio channels. An RS-485 control port shall allow remote monitoring and control of all devices on a single
digital audio leg. Input signal levels shall be adjustable between +4 dBu and –10dBV nominal and +22 dBu peak. The unit
shall indicate audio signal present, signal nominal and signal peak conditions for each channel on the front panel. Digital
converter clipping, system status OK and device identification shall be shown with lighted indicators on the back panel.
Termination of the digital audio and control lines shall be made with DIP switches on the rear panel. The analog audio
input to the digital audio system shall be K+H K8-AI8.
K+H Vertriebs- und Entwicklungsgesellschaf t mbH
Auf dem Kessellande 4A
30900 Wedemark
Germany
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