M-Audio Studiophile BX5 Manual de usuario

Studiophile BX5

Users Manual

Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

What’s in the Box? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Studiophile BX5 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

Front and Rear Panel Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4

Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

XLR Balanced Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

TRS Balanced/Unbalanced Connection . . . . . . . . . . . . . . . . . . . . .7

Connecting to Preamp, Computer or Game Console Outputs . . .8

Setting the EQ Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8

Setting the Acoustic Space Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . .10

Placing the BX5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

Appendix A - Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . .12

Appendix B - Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13

Technical Support & Contact Information . . . . . . . . . . . . . . . . . . . . . .14

Your BX5 Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

Introduction

Thank you for choosing the BX5 Studiophile Series bi-amplified studio nearfield

monitor speakers. M-Audio is well known for digital audio interface technology,

digital converters, audio preamps and mixers. Now, after extensive research and

development, the Studiophile BX5 is born to change the concept of studio

reference monitoring.

The BX5 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 BX5 monitor

is self-powered, directly accepting a line level signal from a variety of sources.

The Studiophile BX5 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.

From pro engineers at commercial studios to home studio owners, the

Studiophile BX5 sets a new affordable standard in studio monitoring.

What’s in the Box?

Your Studiophile BX5 box contains:

•Two BX5 speakers

•Two detachable AC power cords

•This manual

•Actual test results of the BX5 you purchased

Studiophile BX5 Features

1. Woofer

The woofer unit is 5 inches in diameter with a magnetically shielded

mineral-filled polypropylene cone, high-temperature voice coil and damped

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

response. Polypropylene is used to react against the input signals accurately and

to deliver even minimal input precisely while minimizing distortion.

2. Tweeter

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

tweeter can deliver distortion-free original sound and offer extremely natural

response. It minimizes reaction time by using fabric silk for excellent delivery,

and also minimizes resonance by adapting a unique internal damping technology.

3. Sub-Frequency Port

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

discharge extreme low frequencies under 60 Hz.

4. EQ and Acoustic Space Controls

Back panel controls on the BX5s give you compensation for room EQs as well

as compensation for the positioning of the speakers within your room. High

frequency cuts, mid-range boost, and low frequency cutoffs offer a great deal of

control over the sound and presence of the BX5s, while the “Acoustic Space”

settings account for a variety of speaker placements.

5. Enclosure

Just as other components do, the BX5’s enclosure has an important role. In

order to provide more stable performance, the BX5’s enclosure employs a

special high-density MDF and unique interior reinforcement designed to absorb

vibration and impact generated under extreme conditions.

6. Network & Power Amplifiers

The active crossover networks & power amplifiers for the BX5 are specially

designed for this woofer and tweeter.The network properly distributes low, mid,

and high frequencies to the 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 BX5 to drive the woofer and tweeter separately in a high-

end bi-amp structure. The power delivered to the woofer driver at a rated

distortion is 38W, and 38W is also delivered to the tweeter.

Front and Rear Panel Features

Rear Panel

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

unbalanced 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. TRS 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)

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 LABEL: This label contains the model and serial number information.

4. VENT PORT: This port aids in reproduction of very low frequencies by

discharging frequencies below 60 Hz.

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

from the BX5 to proper levels as required.

6. LOW CUTOFF: This 3-position switch sets the bass rolloff frequency.The lowest

setting, 56Hz, is essentially a low cutoff bypass as it does not attenuate the BX5’s

frequency response. Other settings are 80Hz and 100Hz.

7. MID-BOOST: Two selections are available, “In” and “Out.” The Out setting

produces a flat frequency response curve, while the In setting gives a boost in

the mid-range frequencies.

8. HIGH FREQ: Three settings are possible, -2dB, 0dB, and +2dB. 0dB is a “flat”

setting with no attenuation, while the -2dB and +2dB settings will attenuate or

boost the high frequencies (3kHz shelf) by -2dB and +2dB respectively.

9. ACOUSTIC SPACE: This 3-position switch is designed to compensate for

different speaker placements. Please see the section “Setting the Acoustic Space

Switch” for more information.

10. POWER SWITCH:This switch turns the monitor on and off.The on position is

indicated with the marking “.” (a white dot).

11. POWER RECEPTACLE: Accepts a detachable 3-circuit line cord in order to

power the monitor.

12. FUSE HOLDER: Holds the external main fuse.

13. VOLTAGE-SELECT SWITCH: Provides 2 selections, 115VAC and 230VAC, 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,

while the 230V setting is correct for most of the UK and Europe.

Front Panel

The front panel houses the Power LED, which indicates whether the speakers

(amplifier) power is on or off.

Installation

For optimal performance of the BX5, please read the following thoroughly and

carefully prior to installation.

Precautions

Handling: Please do not touch the speaker cones.The BX5 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.

Connections: Connect the XLR balanced or TRS balanced/unbalanced input of

each BX5 to the corresponding pre-amp, computer or game console outputs.

We recommend that you use high-quality balanced or unbalanced cables for

input connections. Also, turn off the power of the BX5 and turn the volume of

the BX5 down to a minimum before making the necessary connections.

Correct Power Operation: Since the BX5 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.

XLR Balanced Connection

Assure that the power switch of the BX5 is turned off and that the volume

control of the BX5 is turned down to a minimum. Connect the male end of an

XLR balanced cable to the balanced input of the BX5 (refer to the following

diagram for balanced connection).

TRS Balanced/Unbalanced Connection

Assure that the power switch of the BX5 is turned to Off and that the volume

control of the BX5 is turned down to a minimum. Connect the male end of a

TRS balanced or TS unbalanced cable to the TRS input of the BX5 (refer to the

following diagram for TRS connection).

Connecting to Preamp, Computer or Game Console 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.

Setting the EQ Switches

Low Cutoff: This 3-position switch sets the Low Cutoff frequency, selecting

between 56Hz, 80Hz and 100Hz. Use the 100Hz setting to emulate a small

speaker setup, the 80Hz setting for Normal Low Frequency performance, or the

56Hz for Normal Extended Low Frequency performance.The 80Hz and 100Hz

settings can also be used in conjunction with a subwoofer, when the subwoofer

is set up to receive the low-frequency material below 80Hz and 100Hz

(respectively).

Mid-Boost:This 2-position switch selects between the “In” and “Out” Mid-Boost

modes.The Out mode produces a flat midrange response for normal monitoring

conditions, while In will move the sound stage forward toward your listening

position.

High-Freq:This 3-position switch selects High Frequency compensation with -2dB,

0dB or +2dB.The 0dB (normal) position produces flat response for use in most

common applications. Use -2dB if your mixes translate as dull or lacking in high

frequencies (lowering the high-frequency response will inspire the mix engineer to

add more highs). Use the +2dB setting for brighter-sounding audio playback, or to

compensate for mixes that translate as too bright.

'Mid-Boost In'

Setting the Acoustic Space Switch

The Acoustic Space switch is a 3-position switch used to select the "Acoustic

Space" in which the speaker is placed—Half Space (speakers against wall, 0dB

position), Three-Quarter Space (speakers in corners or close to wall, -2dB

position), or Full Space (speakers away from wall, -4dB position). The benefits of

using this switch are explained in the following paragraphs.

The bass response of any loudspeaker will differ depending on its placement. If

the speaker is placed close to a wall, the bass will sound louder than when it is

placed on a speaker stand. The technical term for this phenomenon is called

Diffraction Spreading and can be explained as follows:

Below a certain frequency, the sound emitted from a speaker begins to change

its polar radiation pattern, from 180 degrees to 360 degrees.With the speaker

placed close to a wall, its energy can be physically radiated only forward, thereby

limiting the radiation polar pattern to 180 degrees.When the speaker is placed

on a stand, the low-frequency energy is free to radiate in 360 degrees. While

there is a theoretical difference of about 6dB in low-frequency response

between these two placements, the loss (from the wall placement to the speaker

stand placement) is, in practice, normally found to be about 4dB.

Note: At medium and high frequencies, Diffraction Spreading losses do not

occur because the front baffle of the speaker affects low-frequency energy

radiation much like a large area (like a wall). So at medium and high

frequencies, the radiation pattern is always limited to 180 degrees.

The Acoustic Space switch compensates for (Diffraction Spreading)

low-frequency loss by introducing a complimentary correction filter with the

three filter settings (0dB, -2dB and - 4dB) and allows you to place the BX5

speakers close to a wall, on speaker stands, or somewhere in between these two

(such as on a small table top) with the same resulting low-frequency output

produced from each placement.

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