Russound LFP-1.2 User Manual

Low Frequency Protection Circuit

LFP-1.2

Instruction Manual

SP1 INPUT

L+ L- R- R+

SP2 OUTPUT

L+ L- R- R+

RUSSOUND INC
LFP-1.2

LOW FREQ PROTECTION

Product Overview

The LFP-1.2 Low Frequency Protection Circuit reduces low frequency signals that interfere
with autoformer impedance-matching devices. The LFP-1.2 also provides protection from
damaging DC voltage from amplifiers overdriven into “clipping” when it is used with
autoformer selectors or volume controls. The LFP-1.2 is connected between the amplifier
or receiver and the autoformer impedance-matching selector or volume controls.

Connection Instructions

Connect the left and right audio outputs of the amplifier or receiver to the detachable
input connector of the LFP-1.2. Connect the detachable output connector of the LFP-1.2
to the input of the impedance-matching system as seen in Figure 1. Be careful to keep
channel identity and polarity consistent when making connections. The screwless
removable snap connectors will accept up to 14-gauge wire.

2

Figure 1

AMPLIFIER OR RECEIVER

SP1 INPUT

L+ L- R- R+

SP2 OUTPUT

L+ L- R- R+

RUSSOUND INC
LFP-1.2

LOW FREQ PROTECTION

AUTOFORMER IMPEDANCE

MATCHING SELECTOR

1AMP A/B 23456

PRO-6

Mounting

Mount the LFP-1.2 using the two mounting brackets. Be sure that the bottom of the circuit
does not rest against the mounting surface. See Figure 2.

Technical Information

Power: 100 W/ch RMS continuous

200 W/ch average
300 W/ch peak

Low-Frequency DC Protection: Bi-polar capacitor/inductor circuit

Connectors: Screwless removable snap connectors

Wire Size: Accepts up to 14 gauge wire

Dimensions: 4-3/4” x 6”

3

Figure 2

5 Forbes Rd. Newmarket, NH 03857

☎ 603.659.5170 • Fax [phone]

e-mail: [e-mail]

Limited Warranty

The Russound LFP-1.2 is fully guaranteed for Ten (10) years from the date of purchase
against all defects in materials and workmanship. During this period Russound will
replace any defective parts and correct any defect in workmanship without charge for
either parts or labor. For this warranty to apply, the unit must be installed and used
according to its written instructions. If service is necessary, it must be performed by
Russound. The unit must be returned to Russound at the owner’s expense and with prior
written permission. Accidental damage and shipping damage are not considered defects
under the terms of the warranty. Russound assumes no responsibility for defects resulting
from abuse or servicing performed by an agency or person not specifically authorized in
writing by Russound. Damage to or destruction of components due to improper use voids
the warranty. In these cases the repair will be made at the owner’s expense. To return for
repairs, the unit must be shipped to Russound at the owner’s expense, along with a note
explaining the nature of the service required. Be sure to pack in a corrugated container
with at least 3 inches of resilient material to protect the unit from damage in transit.

Russound sells products only through authorized Dealers and Distributors to ensure that
customers obtain proper support and service. Any Russound product purchased from an
unauthorized dealer or other source, including retailers, mail order sellers and online
sellers will not be honored or serviced under existing Russound warranty policy. Any sale
of products by an unauthorized source or other manner not authorized by Russound shall
void the warranty on the applicable product.

Rev.1 28-0086