Boulder 1060 Specifications download pdf (Page 9)

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GETTING

STARTED

CONNECTING AN UNBALANCED SOURCE

Although the inputs are of the 3 pin type, an unbalanced source is

easily accommodated by using a special cable. This cable has an RCA

phono type connector on the source end and a 3 pin connector for going

to the input of the 1060 Power Amplifier.

The minus input (pin 3) should be wired to ground only at the RCA

phono connector. This brings the minus input reference of the 1060 to the

unbalanced source ground, thus reducing ground loops.

Another option for accommodating unbalanced sources is that of the

Boulder ABL2 Input Adapter. It converts a balanced input into a RCA

phono input right at the rear of the 1060.

Like the above cable, the minus input of the 1060 is connected to the

ground of the RCA phono. However, this minus side will then share the

shield wire with the chassis ground and will not have very good hum

rejection.

UNBALANCED INPUT CABLE

3-NEG INPUT

2-POS INPUT

1-GROUND

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Boulder 1060 Specifications Page 9