MFJ MFJ-384 User Manual

MFJ-384

Amplified Communications Speaker

General Information and Operating Instructions

Thank you for purchasing the MFJ-384 Amplified Communications
Speaker. The MFJ-384 is a self-contained, portable amplified communications
speaker that gives you powerful audio with its built-in power amplifier. Please
read this page in its entirity prior to operation of the MFJ-384.

POWER REQUIREMENTS:

The MFJ-384 can be powered by two 1.5volt C size batteries or by an external
power adaptor. The power adaptor should have an output of 6 Vdc and polarity
with the center pin negative.

BATTERYRY INSTALLATION:

• Remove the battery cover.

• Insert two fresh 1.5 volt C size batteries according to the polarity marks inscribed

inside the battery compartment.

• Replace the battery cover.

• The LED on the front of the MFJ-384 will be dimly lit when the power switch is in

the “OFF” position.

• The LED on the front of the MFJ-384 will be brightly lit when the power switch is

in the “ON” position.

Operating Instructions

When you first open the MFJ-384, the audio input connector will be inside the
battery compartment. Open the battery cover to release the audio input connector.

Operation as a Non-amplified Speaker

• Simply connect the 3.5mm audio input plug to the audio source.

• The power switch on the back of the MFJ-384 should be in the “OFF” position.

• When the MFJ-384 is operated in non-amplified mode, the “Volume” and “Tone”

controls are inactive. The volume level should be adjusted from the audio source.

Operation as an Amplified Speaker

• Connect the 3.5mm audio input plug to the audio source.

• Turn power switch on the back of the MFJ-384 to the “ON” position.

• Adjust the “Volume” control to a suitable level. Turn the knob clockwise to increase

the volume or counter-clockwise to decrease the volume.

• Adjust the “Tone” control to a suitable level. Turn the knob clockwise to increase

the treble or counter-clockwise to increase the bass of the audio output.

Note: In amplified mode, it may be necessary to decrease the audio output from
the signal soucre to prevent distortion.

MFJ-384

Amplified Communications Speaker

General Information and Operating Instructions

Thank you for purchasing the MFJ-384 Amplified Communications
Speaker. The MFJ-384 is a self-contained, portable amplified communications
speaker that gives you powerful audio with its built-in power amplifier. Please
read this page in its entirity prior to operation of the MFJ-384.

POWER REQUIREMENTS:

The MFJ-384 can be powered by two 1.5volt C size batteries or by an external
power adaptor. The power adaptor should have an output of 6 Vdc and polarity
with the center pin negative.

BATTERYRY INSTALLATION:

• Remove the battery cover.

• Insert two fresh 1.5 volt C size batteries according to the polarity marks inscribed

inside the battery compartment.

• Replace the battery cover.

• The LED on the front of the MFJ-384 will be dimly lit when the power switch is in

the “OFF” position.

• The LED on the front of the MFJ-384 will be brightly lit when the power switch is

in the “ON” position.

Operating Instructions

When you first open the MFJ-384, the audio input connector will be inside the
battery compartment. Open the battery cover to release the audio input connector.

Operation as a Non-amplified Speaker

• Simply connect the 3.5mm audio input plug to the audio source.

• The power switch on the back of the MFJ-384 should be in the “OFF” position.

• When the MFJ-384 is operated in non-amplified mode, the “Volume” and “Tone”

controls are inactive. The volume level should be adjusted from the audio source.

Operation as an Amplified Speaker

• Connect the 3.5mm audio input plug to the audio source.

• Turn power switch on the back of the MFJ-384 to the “ON” position.

• Adjust the “Volume” control to a suitable level. Turn the knob clockwise to increase

the volume or counter-clockwise to decrease the volume.

• Adjust the “Tone” control to a suitable level. Turn the knob clockwise to increase

the treble or counter-clockwise to increase the bass of the audio output.

Note: In amplified mode, it may be necessary to decrease the audio output from
the signal soucre to prevent distortion.

12 MONTH LIMITED WARRANTY

MFJ Enterprises, Inc. warrants to the original owner of this product, if
manufactured by MFJ Enterprises, Inc. and purchased from an authorized dealer
or directly from MFJ Enterprises, Inc. to be free from defects in material and
workmanship for a period of 12 months from date of purchase provided the
following terms of this warranty are satisfied.

1. The purchaser must retain the dated proof-of-purchase (bill of sale, canceled check,
credit card or money order receipt, etc.) describing the product to establish the validity
of the warranty claim and submit the original or machine reproduction of such proof-of­purchase to MFJ Enterprises, Inc. at the time of warranty service. MFJ Enterprises,
Inc. shall have the discretion to deny warranty without dated proof-of-purchase. Any
evidence of alteration, erasure, or forgery shall be cause to void any and all warranty
terms immediately.

2. MFJ Enterprises, Inc. agrees to repair or replace at MFJ’s option without charge to the
original owner any defective product under warranty, provided the product is returned
postage prepaid to MFJ Enterprises, Inc. with a personal check, cashiers check, or
money order for $7.00 covering postage and handling.

3. MFJ Enterprises, Inc. will supply replacement parts free of charge for any MFJ product
under warranty upon request. A dated proof-of-purchase and a $5.00 personal check,
cashiers check, or money order must be provided to cover postage and handling.

4. This warranty is NOT void for owners who attempt to repair defective units. Technical
consultation is available by calling [phone].

5. This warranty does not apply to kits sold by or manufactured by MFJ Enterprises, Inc.

6. Wired and tested PC board products are covered by this warranty provided only the
wired and tested PC board product is returned. Wired and tested PC boards installed in
the owner’s cabinet or connected to switches, jacks, or cables, etc. sent to MFJ
Enterprises, Inc. will be returned at the owner’s expense unrepaired.

7. Under no circumstances is MFJ Enterprises, Inc. liable for consequential damages to
person or property by the use of any MFJ products.

8. Out-of-warranty Service: MFJ Enterprises, Inc. will repair any out -of-warranty product
provided the unit is shipped prepaid. All repaired units will be shipped COD to the
owner. Repair charges will be added to the COD fee unless other arrangements are made.

9. This warranty is given in lieu of any other warranty expressed or implied.

10. MFJ Enterprises, Inc. reserves the right to make changes or improvements in design or
manufacture without incurring any obligation to install such changes upon any of the
products previously manufactured.

11. All MFJ products to be serviced in -warranty or out-of-warranty should be addressed to
MFJ Enterprises, Inc., 300 Industrial Park Road, Starkville, Mississippi 39759, USA and
must be accompanied by a letter describing the problem in detail along with a copy of
your dated proof-of-purchase.

12. This warranty gives you specific rights, and you may also have other rights which vary
from state to state.

12 MONTH LIMITED WARRANTY

MFJ Enterprises, Inc. warrants to the original owner of this product, if
manufactured by MFJ Enterprises, Inc. and purchased from an authorized dealer
or directly from MFJ Enterprises, Inc. to be free from defects in material and
workmanship for a period of 12 months from date of purchase provided the
following terms of this warranty are satisfied.

1. The purchaser must retain the dated proof-of-purchase (bill of sale, canceled check,
credit card or money order receipt, etc.) describing the product to establish the validity
of the warranty claim and submit the original or machine reproduction of such proof-of­purchase to MFJ Enterprises, Inc. at the time of warranty service. MFJ Enterprises,
Inc. shall have the discretion to deny warranty without dated proof-of-purchase. Any
evidence of alteration, erasure, or forgery shall be cause to void any and all warranty
terms immediately.

2. MFJ Enterprises, Inc. agrees to repair or replace at MFJ’s option without charge to the
original owner any defective product under warranty, provided the product is returned
postage prepaid to MFJ Enterprises, Inc. with a personal check, cash iers check, or
money order for $7.00 covering postage and handling.

3. MFJ Enterprises, Inc. will supply replacement parts free of charge for any MFJ product
under warranty upon request. A dated proof-of-purchase and a $5.00 personal check,
cashiers check, or money order must be provided to cover postage and handling.

4. This warranty is NOT void for owners who attempt to repair defective units. Technical
consultation is available by calling [phone].

5. This warranty does not apply to kits sold by or manufactured by MFJ Enterprises, Inc.

6. Wired and tested PC board products are covered by this warranty provided only the
wired and tested PC board product is returned. Wired and tested PC boards installed in
the owner’s cabinet or connected to switches, jacks, or cables, etc. sent to MFJ
Enterprises, Inc. will be returned at the owner’s expense unrepaired.

7. Under no circumstances is MFJ Enterprises, Inc. liable for consequential damages to
person or property by the use of any MFJ products.

8. Out-of-warranty Se rvice: MFJ Enterprises, Inc. will repair any out-of-warranty product
provided the unit is shipped prepaid. All repaired units will be shipped COD to the
owner. Repair charges will be added to the COD fee unless other arrangements are made.

9. This warranty is given in lieu of any other warranty expressed or implied.

10. MFJ Enterprises, Inc. reserves the right to make changes or improvements in design or
manufacture without incurring any obligation to install such changes upon any of the
products previously manufactured.

11. All MFJ products to be serviced in -warranty or out-of-warranty should be addressed to
MFJ Enterprises, Inc., 300 Industrial Park Road, Starkville, Mississippi 39759, USA and
must be accompanied by a letter describing the problem in detail along with a copy of
your dated proof-of-purchase.

12. This warranty gives you specific rights, and you may also have other rights which vary

from state to state.