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The ATT100-T42 is designed to interface a 100V line speaker system to a 
balanced line-level input such as those found on some Ampetronic loop 
drivers. The unit provides a transformer isolated attenuation of 40dB.

Restrictions on usage

The ATT100-T42 is not suitable for use with unbalanced and microphone 
inputs. It should only be connected to inputs intended for balanced line-level 
signals.

1. Output connection.

The ATT100-T42 is terminated in a 6.3mm 3 pole jack plug. This should be 
plugged directly into the balanced line input of the Ampetronic loop driver.
Note the restrictions listed above. 
Under no circumstances should the output be extended, not even using a 
screened cable. The extended connection would be susceptible to 
interference.

2. 100V line connection

The 100V speaker line should be connected to the 3-pin input plug as shown 
below. 
Plug into ATT100-T42. 
Adjust Input Gain on amplifier as required.

ATT100-T42

Adapter

+

-

100V

LINE

SAFETY

EARTH

(IF FITTED)

INSIDE VIEW OF CONNECTOR

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Safety Notice

The ATT100-T42 contains connections to speaker systems which may carry 
hazardous voltages. If any damage to the unit is visible do not use the ATT100-
T42, but switch off all attached systems and disconnect the unit from them 
before switching on again. Never attempt to open or modify the unit. 

Warranty Information

ATT100-T42 is designed and manufactured in England by Ampetronic Ltd.

DECLARATION OF CONFORMITY
 
Manufacturer:

Ampetronic Ltd.

Address:

Northern Road, Newark, 
Nottinghamshire, NG24 2ET.
United Kingdom.

 
Declares that the product:

Description:

Input Adapter

Type Name:

ATT100-T42

 

December 2011

This product carries a five year parts and labour warranty from date of 
shipment from Ampetronic. To qualify for the five year warranty, the product 
must be registered at www.ampetronic.com (products/warranty), without which 
the warranty will be valid for two years only.
The warranty could be invalidated if the instructions in this handbook are not 
followed correctly, or if the unit is misused in any way. 

Conforms to the following Directive(s) and Norm(s):

Directive 2004/108/EC
EMC:

EN55103-1 : 2009 Emission
EN55103-2 : 2009 Immunity

 

Directive 2006/95/EC
Safety:

EN60065 : 2002

Date: 
J.R. Pieters
Managing Director
Ampetronic Ltd.

UP13008-6

Ampetronic Ltd,

Northern Road, Newark,

Nottinghamshire, NG24 2ET

United Kingdom

Tel: +44 (0) 1636 610062   Fax: +44 (0) 1636 610063 

www.ampetronic.com   Email:   sales@ampetronic.com

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