Kenton THRU-25 User Manual

THRU

THRU----2

THRUTHRU

1 into 25 MIDI Thru Box

25

22

5

55

Operating manual

FCC Statement for THRU-25

NOTE: This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference in a
residential installation. This equipment generates, uses and can radiate radio
frequency energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio communications. However,
there is no guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or more of the following
measures:

-- Reorient or relocate the receiving antenna.

-- Increase the separation between the equipment and receiver.

-- Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.

-- Consult the dealer or an experienced radio/TV technician for help.

________________________________________________________

2

Description

The THRU-25 has one MIDI Input and twenty-five MIDI Thru ports to enable you to
connect several MIDI devices to one MIDI output, without the usual problems
encountered when daisy-chaining MIDI devices.

The THRU-25 has an opto-coupled MIDI Input and separate drive circuits for each
MIDI Thru socket for optimum performance. The THRU-25 also incorporates active
circuitry to help restore the quality of signals received at the MIDI Input that may
have become degraded by losses in the MIDI cable.

The THRU-25 is powered by a plug-top switch-mode power adaptor (supplied), so it
doesn’t need periodic battery changes to keep it working, enabling you to “fit and
forget”.

Connecting

Ensure that the power adaptor is plugged in, and the ACTIVE LED on the THRU-25
is on. Connect the MIDI output of your keyboard or computer to the MIDI Input of the
THRU-25 and connect one or more of the MIDI Thru ports of the THRU-25 to the
MIDI inputs of the devices you want to control.

Do not connect any of the MIDI Thru ports of the THRU-25 back to the MIDI Input of
the device which is supplying data to the MIDI In port of the THRU-25, as this may
cause a MIDI loop to occur. This may cause note hangs or other undesirable effects.

The ACTIVE LED will show steady green when power is connected and no MIDI is
being received. It will flicker when MIDI data is being received at the MIDI Input.

3

Specification

Power Input 9V DC (regulated or unregulated) – never apply more than 12V

(never use an unregulated supply greater than 9V as
unregulated supplies typically give a higher output than shown)

Power 150mA, 2.1mm plug (centre positive)

MIDI 1 x In, 25 x Thru

Weight 370g (excluding power supply)

Dimensions 300 x 54 x 35 mm

Power supply Supplied with unit. UK,EU,US or Australian types available.

Warranty

The THRU-25 comes with a 12 month (from purchase date) back to base warranty,
(i.e. customer must arrange and pay for carriage to and from Kenton Electronics Ltd).

WEEE DIRECTIVE

Correct disposal of this product at the end of its working life

(applies to the European Union & other European countries with separate collection systems)

The crossed-out wheelie bin symbol affixed to this product indicates that it should not be disposed of
with other household wastes at the end of its working life. To prevent possible harm to the environment
or to human health from uncontrolled waste disposal, please separate this from other types of wastes
and recycle it responsibly to promote the sustainable re-use of material resources.

Household users should contact either the retailer where they purchased the product, or their local
government office for details of where and how they can take this item for environmentally safe
recycling.

Business users should contact their supplier and check the terms and conditions of the purchase
contract. This product should not be mixed with other commercial wastes for disposal.

www.kenton.co.uk

Kenton Electronics Limited

Brookfarm House, Station Road, South Wimbledon, London, SW19 2LP, UK

Tel: [phone] Fax: [phone]

TH

rev# 1v01 e. & o. e.  11

4

March 2015