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2024年8月27日发(作者：线含景)

BX8a

User Guide

EnglishStudiophile BX8a

Introduction

Thank you for choosing the Studiophile Series BX8a bi-ampliﬁed studio near-ﬁeld monitor speakers. M-

Audio is well known for digital audio interface technology, digital converters, audio preamps and mixers.

Now, after extensive research and development, M-Audio is proud to present the Studiophile BX8a.

The BX8a was designed and tested by veteran audio engineers to meet your needs in a studio monitoring

environment. It is focused on the functional goal of delivering pure, original sound without any additional

coloration. The BX8a monitor is self-powered, directly accepting a line-level signal from a variety of

sources.

The Studiophile BX8a is designed to overcome all the limitations of conventional studio reference monitors

within the digital audio environment. This system delivers a wide-range frequency response by employing

two extraordinary drivers and unique crossover technology licensed by M-Audio. It boasts a stable and

balanced low-mid frequency response along with a deﬁned mid and high-frequency response as well.

Both drivers are magnetically shielded for desktop music production.

For pro engineers at commercial studios to home studio owners, the Studiophile BX8a sets a new

affordable standard in studio monitoring.

What’s in the Box?

Your Studiophile BX8a box contains:

• Two BX8a speakers

• Two detachable AC power cords

• This manual

Studiophile BX8a Features

1. Woofer

The woofer unit is 8 inches in diameter with a magnetically shielded Kevlar cone, high-temperature voice

coil and damped rubber surround. It is designed to deliver balanced mid and low-frequency response.

M-Audio’s new BX8a employs Kevlar for low-frequency driver construction. The same material used in

bullet-proof vests, Kevlar’s high resilience makes it ideal for use in speaker cones—although it is typically

reserved for monitors with higher price tags than the BX8a. Needless to say, Kevlar represents a signiﬁcant

improvement over the polypropylene and paper used in most monitors at this price.

2. Tweeter

By employing a specially developed 1-inch silk dome with magnetic shielding, the tweeter can deliver

distortion-free original sound and offer an extremely natural response. Its design minimizes reaction time

by using a specially shaped silk dome for excellent delivery, and also minimizes resonance by adapting

a unique internal damping technology.

3. Sub-Frequency Port

The air vent hole in the rear panel is called a Sub-Frequency Vent Port and is designed to allow the

discharge of extremely low frequencies occurring below 30Hz.

4. Enclosure

Like the other components, the BX8a’s enclosure has an important role in shaping the overall sonic

response. In order to provide more stable performance, the BX8a’s enclosure employs a special high

acoustic efﬁciency MDF and unique interior reinforcement designed to absorb vibration and impact

generated under extreme conditions. The custom design on the front panel will aid in diffraction and will

beneﬁt stereo imaging.

5. Network and Power Ampliﬁers

The active crossover network and power ampliﬁers for the BX8a are specially designed for its woofer

and tweeter. The network properly distributes low, mid, and high frequencies to the driver components in

order to reduce distortion and loss of sound, thus achieving a naturally balanced sound.

In order to generate powerful, ultra-crisp sound, there are two separate power ampliﬁers inside the BX8a

for driving the woofer and tweeter separately in a high-end bi-amp structure. The power delivered to the

woofer driver at a low-rated distortion is 70W, and 60W is also delivered to the tweeter.

Front and Rear Panel Features

Rear Panel Features

1. LR INPUT: This jack accepts XLR input connections with either balanced or unbalanced X

wiring. The input wiring of an XLR connector should be as follows:

< XLR PIN 1 . . . . . signal ground (shield)

< XLR PIN 2 . . . . . signal positive (+)

< XLR PIN 3 . . . . . signal negative (–)

2. T RS INPUT: This jack accepts 1/4” connections with either balanced or unbalanced wiring. For

balanced wiring, a three-conductor TRS plug is necessary. The input wiring of a TRS connector

should be as follows:

< TRS TIP . . . . . . . signal positive (+)

< TRS RING . . . . . signal negative (–)

< TRS SLEEVE . . . . signal ground (shield)

Studiophile BX8a

Unbalanced 1/4” wiring can be done with either a two- or three-conductor (TS or TRS) plug. A two-conductor

(TS) plug automatically grounds the signal negative input, whereas a three-conductor (TRS) plug, wired

unbalanced, provides the option of leaving the negative input open or grounded. We recommend that

you ground the unused negative input (this can be done by wiring the ring and sleeve of the TRS plug

together).

The TRS input is summed through a balanced input ampliﬁer with the XLR input, allowing both inputs to

be used simultaneously. Input speciﬁcations apply to both.

3. PRODUCT SPECIFICATION: This label contains the model and speciﬁcation information.

4. SUB-FREQUENCY VENT PORT: This port aids in reproduction of very low frequencies by discharging

frequencies below 30Hz.

5. VOLUME CONTROL: Use the volume control to set the output sound pressure from the BX8a to

proper levels as required.

6. POWER RECEPTACLE: Accepts a detachable 3-circuit line cord in order to power the monitor.

7. FUSE HOLDER: Holds the external main fuse.

8. VOLTAGE-SELECT SWITCH: Provides two selections, 115V AC and 230V AC, and should be set to

match the “house supply” (receptacle) voltage of the country or location in which the speaker is

used. The 115V setting is correct for the USA and Japan, while the 230V setting is correct for most

of the UK and Europe.

9. POWER SWITCH: This switch turns the monitor on and off.

Front Panel Features

The front panel houses the Power LED, which indicates whether the speakers (ampliﬁer) power is on or

off.

Installation

For optimal performance of the BX8a, please read the following thoroughly and carefully prior to

installation.

Precautions

Handling: Please do not touch the speaker cones. The BX8a set is packaged in the box tightly, so your

attention is required when taking the monitors out of the box. To avoid possible damage to the speaker

units, hold both sides of the monitor in order to pull it out of the box. The speaker cones should not be

touched in order to avoid damage even after they are out of the box.

Correct Power Operation: Since the BX8a contains its own ampliﬁer, it must be connected to a power

outlet using the detachable AC cable provided. Before connecting power, please make sure that the

Voltage-Select Switch located on the speaker’s rear panel is set to the appropriate position, as described

in the rear-panel features list appearing earlier in this manual.

WARNING! - Use of improper Voltage-Select Switch combinations may result in hazardous

conditions and/or damage to speaker components not covered by speaker warranty.

Connections: You can connect either an XLR balanced cable or TRS balanced/unbalanced cable from the

input of each BX8a to your corresponding preamp, computer or game console outputs. We recommend

that you use high-quality balanced or unbalanced cables for input connections. Also, ALWAYS turn off the

power of the BX8a and turn the volume of the BX8a down to a minimum before making the necessary

connections.

XLR Balanced Connection

Assure that the power switch of the BX8a is turned off and that the volume control of the BX8a is turned

down to a minimum. Connect the male end of an XLR balanced cable to the balanced input of the BX8a

(refer to the following diagram for balanced connection).

TRS Balanced/Unbalanced Connection

Assure that the power switch of the BX8a is turned to off and that the volume control of the BX8a is turned

down to a minimum. Connect the male end of a TRS balanced or TS unbalanced cable to the TRS input of

the BX8a (refer to the following diagram for TRS connection).

Studiophile BX8a

Connecting to Preamp or Computer Outputs

Before connecting, make sure the output device’s power has been turned off. Plug the XLR balanced, TRS

balanced or TS unbalanced cable to the corresponding output connectors of a pre-ampliﬁer, computer

or game console.

Placing the BX8a

Placing the speakers is one of the most important procedures in order to monitor sound accurately. To

monitor with the BX8a’s performing to their maximum capability, an appropriate listening environment

and correct placement are required. Please refer to the following for correct BX8a placement.

1. he two units and the listener should basically align to form a regular triangle. Refer to the following T

diagram.

2. Position the monitors so that the top of the woofers are level with your ears in a normal listening

environment. Refer to the following diagram.

3. Place the BX8a’s vertically with the woofer on the bottom. Placing the BX8a’s horizontally is not

recommended.

Remarks: DO NOT place any obstacles that may block the ﬂow of air in front or between the

monitors. Also remove reﬂective materials such as glass, mirrors or metal from the monitoring

environment. PLACE THOSE MATERIALS AWAY FROM THE PATH OF THE SOUND FROM

THE BX8a’s.

Contact Information

If you have any questions, comments or suggestions about this or any M-Audio product, we invite you to

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