O Audio BASH Manuale utente

O Audio 300W BASH

Subwoofer Amplifier User’s Manual V1.2 page 1 of 12

O Audio 300W BASH

Subwoofer

Amplifier

User’s Manual

O Audio 300W BASH

Subwoofer Amplifier User’s Manual V1.2 page 2 of 12

TABLE OF CONTENTS

INTRODUCTION...............................................................................................................3

WARNINGS AND CAUTIONS ............................................................................................4

INSTALLATION.................................................................................................................5

CONTROL DESCRIPTION..................................................................................................9

SERVICE AND WARRANTY .............................................................................................10

SPECIFICATIONS ...........................................................................................................11

O Audio 300W BASH

Subwoofer Amplifier User’s Manual V1.2 page 3 of 12

INTRODUCTION:

Thanks for purchasing the O Audio 300W BASH

Subwoofer Amplifier. This amplifier

features BASH

technology which enables a high output power amplifier in a small

package.

Traditional Class AB amplifiers use a fixed voltage power supply. This approach is

wasteful and necessitates extensive heatsinking, particularly for high power

amplifiers such as this one. Additionally, primitive unregulated power supplies are

typically used that require a substantial, and expensive, transformer to assure

stable supply voltages over a range of load conditions. Inexpensive subwoofer plate

amplifiers typically skimp on the transformer size in the interest of low cost.

BASH

amplifier technology marries a robust Class AB amplifier with a smart power

supply that adaptively provides the necessary output voltage required to produce

low-distortion output power. The O Audio 300W BASH

Subwoofer Amplifier will

produce up to 300W RMS into a 4Ùload at a Total Harmonic Distortion (THD) of less

than 0.09% and less then 0.04% between 0W –275W. With an 8Ùload, the

amplifier will produce up to 150W RMS at a THD less than 0.05%. Soft limiting

circuitry is active above 150W (into an 8Ùload).

In addition to BASH

amplifier technology, the O Audio 300W BASH

Subwoofer

Amplifier includes the essential continuously variable controls (output level, phase,

and crossover frequency) necessary to integrate a subwoofer into your listening

environment.

O Audio 300W BASH

Subwoofer Amplifier User’s Manual V1.2 page 4 of 12

WARNINGS AND CAUTIONS:

WARNING –THIS AMPLIFIER MODULE IS DESIGNED FOR INSTALLATION INTO A

SUBWOOFER ENCLOSURE, OR INTO ITS OWN ENCLOSURE. WHEN PROPERLY

INSTALLED, ONLY THE EXTERIOR FACEPLATE SHOULD BE ACCESSIBLE TO THE USER –

ANY OTHER CONFIGURATION IS NOT SAFE FOR THE CASUAL USER. IT IS IMPORTANT

THAT THIS MODULE BE PROPERLY HOUSED TO PREVENT ACCIDENTAL CONTACT WITH

DANGEROUS VOLTAGES –BOTH MAINS AC (115VAC OR 230VAC) AS WELL AS HIGH

VOLTAGE DC (>42VDC). THESE VOLTAGES CAN INJURE AND KILL AND SHOULD BE

TREATED WITH RESPECT.

WARNING –AS WITH ANY PIECE OF ENTERTAINMENT ELECTRONICS, THIS MODULE IS

INTENDED FOR INDOOR USE. IT SHOULD NOT BE EXPOSED TO WATER (INCLUDING

CONDENSATION).

CAUTION –

Damage not covered by the warranty can occur if the AC SELECT switch

setting does not match the actual AC input voltage.

CAUTION –The amplifier relies on convection cooling, so air must pass freely over

the faceplate. Do not mount the amplifier in a location where faceplate airflow is

blocked. The amplifier does include overtemperature protection and will shut down

if overheated. This thermal protection will automatically reset once the amplifier is

cool.

CAUTION –This amplifier is designed for use with drivers that are rated at 4Ùor

greater. Drivers whose nominal impedance rating is less than 4Ùcan damage the

amplifier. Driver combinations (this includes any configuration where there are

multiple voice coils) that result in a load of less than 4Ù(when calculated using the

driver’s nominal impedance) can damage the amplifier.

Damage caused by low

impedance loads are not covered by the warranty.

O Audio 300W BASH

Subwoofer Amplifier User’s Manual V1.2 page 5 of 12

INSTALLATION:

The O Audio 300W BASH

Subwoofer Amplifier is designed to be installed into a

subwoofer enclosure or its own dedicated enclosure. Switches and other orifices are

airtight. Also, the back of the faceplate has a gasket to provide an airtight seal when

the amplifier module is mounted into a subwoofer enclosure.

All dimensions are in inches unless otherwise noted.

O Audio 300W BASH

Subwoofer Amplifier User’s Manual V1.2 page 6 of 12

INSTALLATION (continued):

Side view:

O Audio 300W BASH

Subwoofer Amplifier User’s Manual V1.2 page 7 of 12

INSTALLATION (continued):

Cutout dimensions are 6.0”H x 9.875”W. We recommend allowing a minimum

mounting depth of 3.5”.

Electrical connections to the subwoofer amplifier consist of the AC mains input,

audio input (either low or high level), and speaker output.

CAUTION –

Damage not covered by the warranty can occur if the AC SELECT switch

setting does not match the actual AC input voltage. Also, the AC input fuse must be

sized per the fuse recommendations printed on the faceplate.

The amplifier is designed to operate on either 115VAC/60Hz or 230VAC/50-60Hz AC

input. The amplifier is shipped in the North American configuration (AC input switch

setting and AC fuse selection are set for 120VAC/60Hz).

To change the AC input range, start by disconnecting AC power from the amplifier.

DO NOT CHANGE AC INPUT RANGE WITH THE AC POWER CONNECTED TO THE

AMPLIFIER! Set the AC Select switch to the desired range (115VAC or 230VAC). ALSO,

THE AC INPUT FUSE MUST BE PROPERLY SELECTED TO MATCH THE AC INPUT RANGE!

Please refer to the faceplate silkscreen for the correct fuse size and rating. The

fuseholder is integrated into the AC inlet connector housing and is located just

below the AC inlet connector.

AC mains connections are simply made with the provided AC cable. One end of the

provided cable (IEC320 style receptacle) plugs into the connector located on the

amplifier faceplate –the other end, into a 15A or 20A three-pronged North American

AC receptacle. Due to the wide variety of plugs outside of North America, we are

unable to stock and offer power cables suitable for other regions.

Should the AC inlet fuse blow, REMOVE AC POWER FROM THE UNIT; then, determine

and clear the source of the problem (such as shorted speaker output). With AC

power removed, replace the blown fuse. THE AC INPUT FUSE MUST BE PROPERLY

SELECTED TO MATCH THE AC INPUT RANGE! Please refer to the faceplate silkscreen

for the correct fuse size and rating. Replacing the fuse with a value other than that

shown on the faceplate silkscreen will void the warranty.

O Audio 300W BASH

Subwoofer Amplifier User’s Manual V1.2 page 8 of 12

Use only one set of audio inputs –either the low level audio inputs (RCA receptacles)

or the high level audio inputs (binding posts).

Low level audio inputs are made via RCA receptacles. The amplifier can accept left

and right channel signals. Single channel connection (such as an LFE output from a

home theater receiver or pre-pro) may be made to either input.

High level audio inputs are made via binding posts. The amplifier can accept

speaker level right and left channel signals.

In the final installation location, please assure that air can flow freely over the

faceplate.

Speaker connections are made using the pre-attached cable. Connect the red wire

to the + terminal on the driver; the black wire to the –terminal on the driver.

DO NOT CONNECT THE AMPLIFIER TO DRIVERS OR DRIVER COMBINATIONS THAT ARE

LESS THAN 4Ù(BASED ON THE DRIVER NOMINAL RATING). Refer to the last Caution

on page 3 for more information.

O Audio 300W BASH

Subwoofer Amplifier User’s Manual V1.2 page 9 of 12

CONTROL DESCRIPTION:

Here is a list of controls with a brief description of function. Controls are listed in

order of appearance on the amplifier starting with the upper left:

VOLUME –This control is used to set the gain of the amplifier to match the

subwoofer’s output with the rest of your system.

PHASE –This control is used as necessary so the subwoofer does not sound “out of

step”with the rest of your system.

AUTO/ON –When set to the AUTO mode, the unit senses the input signal and

automatically turns on. This action is indicated by the LED (located to the left of the

GAIN knob) turning green. Once the unit does not sense any input signal, then the

unit enters standby mode after 10-20 minutes. This mode is indicated by LED turning

red.

CROSSOVER FREQUENCY –The built-in crossover is a 4

order (24dB/octave)

lowpass crossover which may be adjusted from 40Hz to 110Hz. Refer to Chart 2 in

the Specification section for more information.

CROSSOVER BYPASS SWITCH –The built-in crossover can be bypassed by setting

this switch to DISABLED. Refer to Chart 1 in the Specification section for amplifier

frequency response when the crossover is bypassed.

POWER –Primary AC power control. Works in conjunction with the AUTO/ON switch

(see AUTO/ON switch description earlier in this section).

AC SELECT –Selects the AC input mode –either 115VAC/60Hz or 230VAC/50-60Hz.

The AC input fuse (see faceplate silkscreen for values) must match the selected

range. WARNING –DAMAGE NOT COVERED BY THE WARRANTY CAN OCCUR IF THE AC

SELECT SWITCH SETTING DOES NOT MATCH THE ACTUAL AC INPUT VOLTAGE.

O Audio 300W BASH

Subwoofer Amplifier User’s Manual V1.2 page 10 of 12

SERVICE AND WARRANTY:

O Audio warrants the O Audio 300W BASH

Subwoofer Amplifier from material or

workmanship defects for a period of one year after purchase. We will provide a

replacement (either new or refurbished, at our discretion) with a full one-year

warranty. Please retain proof of purchase date. This warranty does not cover

damage that results from misuse of this product.

O Audio provides attentive customer service. We want you to be happy with this

product. Please e-mail us at oaudioinfo@oaudio.com should you have any

questions or comments regarding this product.

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