M Audio Speaker BX5 User Manual

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  
 
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.  
3
 
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  
XLR PIN 2  
XLR PIN 3  
Signal ground (Shield)  
Signal positive (+)  
Signal negative (–)  
2. TRS INPUT: This jack accepts 1/4” connections with either balanced or  
unbalanced wiring. For balanced wiring, a three-conductorTRS plug is necessary.  
The input wiring of a TRS connector should be as follows:  
TRS TIP  
TRS RING  
TRS SLEEVE  
Signal positive (+)  
Signal negative (–)  
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).  
4
 
TheTRS 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.  
5
 
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 orTRS 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.  
6
 
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 improperVoltage-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).  
7
 
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).  
8
 
Mid-Boost:This 2-position switch selects between theIn” andOut” 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.  
'Mid-Boost In'  
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.  
9
 
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.  
10  
 
Placing the BX5  
Placing the speakers is one of the most important procedures in order to  
monitor sound accurately. To monitor with the BX5s performing to their  
maximum capability,an appropriate listening environment and correct placement  
are required. Please refer to the following for correct BX5 placement.  
1. The two units and the listener should basically align to form a regular triangle.  
Refer to the following 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 BX5s vertically with the woofer on the bottom. Placing the BX5s  
horizontally is not recommended.  
Remarks: DO NOT place any obstacles that may block the flow of air in  
front or between the BX5s. 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 BX5s.  
11  
 
Appendix A - Technical Specifications  
Type: Two-way studio reference  
LF Driver: 5-inch dia., magnetically-shielded with curved mineral-filled  
polypropylene cone, high temperature voice coil and damped rubber  
surround  
HF Driver: 1-inch dia., magnetically-shielded with natural silk dome  
Frequency Response: 56Hz - 20kHz  
Crossover Frequency: 3.0kHz  
LF Amplifier Power: 38W  
HF Amplifier Power: 38W  
S/N Ratio: >100dB below full output, 20kHz bandwidth  
Input Connectors: One XLR balanced input connector; one TRS  
balanced/unbalanced input connector  
Polarity: Positive signal at + input produces outward low-frequency  
cone displacement  
Input Impedance: 20k ohms balanced, 10k ohms unbalanced  
Input Sensitivity: 85 mV pink noise input produces 90dBA output SPL at 1  
meter with volume control at maximum  
Acoustic Space Control: 0dB, -2dB, -4dB  
High Frequency Control: -2dB, 0dB, +2dB  
Mid-Boost Control: In, Out  
Low Cut-off Frequencies: 56Hz, 80Hz, 100Hz  
Protection: RF interference, output current limiting, over temperature, turn  
on/off transient, subsonic filter, external main fuse  
Indicator: Blue power on/off indicator on front panel  
Power Requirements: Dual-voltage (selectable by rear-panel switch) for  
either 115V/~60Hz, 230V/~50Hz; powered via detachable 3-circuit line cord  
Cabinet: vinyl-laminated MDF  
Dimension: 250 mm (H) x 166 mm (W) x 200 mm (D)  
Weight: 5kg/unit (without packing)  
* Above specifications subject to change without notice  
Tested to  
comply  
with FCC  
Standards  
For Home or Studio Use  
12  
 
Appendix B - Block Diagram  
13  
 
Technical Support & Contact Information  
For additonal help, contact M-Audio Technical Support by telephone  
(626-445-7556, 9-5 PST M-F), by fax (626-445-8407) or by e-mail  
If you have any questions, comments or suggestions about this or any M-Audio  
product, we invite you to contact us directly at:  
M-AUDIO U.S.  
45 E. Saint Joseph St.  
Arcadia, CA 91006-2861  
U.S.A.  
Sales Information:  
Sales Information (email):  
Tech Support:  
626-445-2842  
626-445-8495  
Tech Support (email):  
Fax:  
626-445-7564  
Internet Home Page:  
M-AUDIO U.K.  
Unit 5, Saracen Industrial Park  
Mark Rd.  
Hemel Hempstead, Herts HP2 7BJ  
England  
Sales Information:  
Sales Information (email):  
Technical Support:  
Technical Support (email):  
Fax:  
44 (0) 144 241 6590  
44 (0) 871 717 7102  
44 (0) 144 224 6832  
Internet Home Page:  
M-AUDIO Deutschland (Germany)  
Kuhallmand 34  
D-74613 Ohringen  
Germany  
Sales Information:  
Sales Information (email):  
Technical Support:  
Technical Support (email):  
Fax:  
49 7941 98 7000  
49 7941 98 70030  
07941 98 70070  
Internet Home Page:  
M-AUDIO Canada  
1400 St. Jean-Baptiste Ave., #150  
Quebec City, QC G2E 5B7  
Canada  
Tel:  
418-872-0444  
Fax:  
418-872-0034  
Email:  
Internet Home Page:  
M-AUDIO Japan  
Annex Building 6F  
2-18-10 Marunouchi  
Naka-Ku, Nagoya 460-0002  
JAPAN  
Tel:  
81 52 218 3375  
Fax:  
81 52 218 0875  
Email:  
Internet Home Page:  
14  
 
Your BX5 Warranty  
M-AUDIO warrants that this product is free of defects in materials and  
workmanship under normal use for a period of One (1) year from purchase  
date, so long as the product is: owned by the original purchaser; the original  
purchaser has proof of purchase from an authorized M-AUDIO dealer; and the  
purchaser has registered his/her ownership of the product by sending in the  
completed warranty card.  
This warranty explicitly excludes any included external non-integrated power  
supplies and cables which may become defective as a result of normal wear and tear.  
In the event that M-AUDIO receives written notice of defects in materials or  
workmanship from such an original purchaser, M-AUDIO will either replace the  
product, repair the product, or refund the purchase price at its option. In the  
event any repair is required, shipment to and from M-AUDIO and a nominal  
handling charge shall be borne by the purchaser. In the event that repair is  
required, a Return Authorization number must be obtained from M-AUDIO.  
After this number is obtained, the unit should be shipped back to M-AUDIO in  
a protective package with a description of the problem and the Return  
Authorization clearly written on the package.  
In the event that M-AUDIO determines that the product requires repair  
because of user misuse or regular wear,it will assess a fair repair or replacement  
fee. The customer will have the option to pay this fee and have the unit repaired  
and returned, or not pay this fee and have the unit returned unrepaired.  
The remedy for breach of this limited warranty shall not include any other  
damages. M-AUDIO will not be liable for consequential, special, indirect, or  
similar damages or claims including loss of profit or any other commercial  
damage, even if its agents have been advised of the possibility of such damages,  
and in no event will M-AUDIO's liability for any damages to the purchaser or  
any other person exceed the price paid for the product, regardless of any form  
of the claim. M-AUDIO specifically disclaims all other warranties, expressed or  
implied. Specifically, M-AUDIO makes no warranty that the product is fit for any  
particular purpose.  
This warranty shall be construed, interpreted, and governed by the laws of the  
state of California. If any provision of this warranty is found void, invalid or  
unenforceable, it will not affect the validity of the balance of the warranty, which  
shall remain valid and enforceable according to its terms. In the event any  
remedy hereunder is determined to have failed of its essential purpose, all  
limitations of liability and exclusion of damages set forth herein shall remain in  
full force and effect.  
15  
 
Notes:  
BX5-111402  
16  
 

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