User manual M-AUDIO STUDIOPHILE BX10S

[. . . ] It splits the signal by routing everything below that frequency What's in the Box?And by using a Your Studiophile BX10s box contains: 4th-order Linkwitz-Riley topology, the circuit enables you to achieve the flattest net response through the crossover point. For multichannel systems, the BX10s < One BX10s active powered subwoofer with removable driver can reproduce just the output of the LFE (low-frequency effects) channel, or it protection grill can reproduce the bass from some or all of the main channels using conventional < One detachable AC power cord multichannel bass management schemes. In this multichannel context, you can simply "open up" the BX10s fully by setting it to 200Hz (for use with external < One non-latching footswitch for subwoofer bypass function bass managers), or you can set it to 120Hz (to comply with the Dolby Digital < Four removable cone-shaped feet standard for the LFE band limit). [. . . ] The port provides a means for the rear output of the driver to contribute to the total output of the system--but only over a very narrow range of frequencies centered around a "Helmholtz resonance" (determined by the compliance and mass of the air in the port tube). The port effectively gives the subwoofer a smooth response down to 20Hz, and since its low-frequency contribution complements that of the frontfiring woofer driver, the woofer stays linear and distortion-free throughout the passband (because its movement stays within its maximum excursion limits). Studiophile BX10s Subwoofer 3 English Enclosure Setting Up the BX10s AC Voltage Select: Since the BX10s contains its own amplifier, it must be connected to a power outlet using the detachable AC cable provided. Note that the "AC Select" switch (located below the IEC socket for the mains power cord) is user-selectable for 100-120V~50/60 Hz or 220-240V~50/60Hz operation. Before you do anything, make sure the AC voltage select switch is set to the appropriate position for your location. Multichannel (e. g. , 5. 1-channel surround) Operation: If you're mixing or monitoring a multichannel source, you undoubtedly have an external bass management system and/or you may be sending the LFE (low-frequency effects) channel directly to the subwoofer with no additional signal redirection. In this scenario, you can route your subwoofer audio signal to either the left or right input on the BX10s. Further, you should bypass the BX10s' internal crossover by setting the crossover control to the 200Hz position (fully open). Warning: Use of improper voltage/selector switch combinations may result in hazardous conditions and/or damage to speaker components not covered by speaker warranty. Connecting Audio 2-Channel Stereo Operation: Connect the main left and right outputs of your mixing console, audio interface, or sound card to the XLR or TRS balanced inputs on the back of the BX10s; then route the left and right XLR or TRS balanced outputs to your direct-field monitors. (While the TRS inputs and outputs will work with unbalanced cables, we strongly recommend you use balanced cables--in doing so, you'll have better immunity to inductively coupled noise from power cables, etc. ) < XLR PIN 1 and TRS sleeve = signal ground (shield) < XLR PIN 2 and TRS tip = signal positive (+) < XLR PIN 3 and TRS ring = signal negative (­) Adjusting the Back Panel Controls Crossover control* : we've touched on this topic already, but to complete the discussion, consider the following: < The crossovers of most A/V home theater systems are set to 80Hz (assuming they're being used with a subwoofer). (Pink noise works great for this too. ) Crawl around the floor of your room and listen for a place where the sound is "fullest" but also "tight" sounding. If you want to be more precise, you can use a 1/12th-octave real-time (spectrum) analyzer instead of your ears and perform the same exercise. (If you do this, make sure you play pink Volume : you should always send a line-level signal to the BX10s inputs. noise as the test signal and observe where the spectral response is smoothest When the volume control is all the way up, 85mV of pink noise at the input will and has greatest low-frequency extension. ) produce 100dBA output SPL at one meter from the front baffle. The volume control affects the level going to the BX10s amplifier and does not affect the Please note that because low-frequency signals radiate omnidirectionally, you level of the BX10s' outputs that feed your direct-field monitors. Generally, may find that the best location sonically for the BX10s is quite inconvenient-- we recommend that you try to get the flattest, most even system response like in an area of your studio with a lot of foot traffic. If this is the case, you between your subwoofer and your direct-field monitors--so depending on can simply flip the Phase switch on the BX10s' back panel and repeat the the acoustics of your environment and how you've set up your signal path exercise, hoping for a more convenient outcome. and levels, you should spend a few minutes calibrating the respective levels of the subwoofer and each of your main monitors. If you have access to pink Finally, once you've placed the BX10s where you believe it will sound best, noise signals and/or swept sine waves (linear and logarithmic), they can be of give yourself a sanity check and play some material along with direct-field great help for ensuring your system has the smoothest tonal balance from monitors, listening from your standard mix position. (Make sure the BX10s level, phase, and crossover are set appropriately. ) If something is askew, try top to bottom. As always, please feel free to experiment Subwoofer Bypass : this is a 1/4" mono jack for connecting a non- with different locations (and different directions for facing the driver). . . you latching footswitch like the M-Audio SP-1 or any sustain pedal for a keyboard may inadvertently find a better way to place the subwoofer even if you think controller. In 2-channel situations, toggling the footswitch triggers a relay its current location already sounds good. circuit that mutes the subwoofer output and reroutes the full-bandwidth audio signal directly to your direct-field monitors. In essence, it takes the subwoofer (with its crossover) completely out of the signal path so you can easily audition your mixes both with and without the presence of the BX10s Your BX10s Warranty subwoofer's low frequency extension--all from your mixing position. [. . . ] Remember, also, that the frequency of any given signal is inversely proportional to its wavelength--so, for example, at 40Hz, one wavelength is about 8. 5 meters or 28 feet; at 80Hz one wavelength is a little over 4 meters, or 14 feet; etc. Where to start: first of all, you should always place the subwoofer on the floor when you are using it--never on a table or speaker stand. One theory suggests that the best position for a subwoofer in a 2-channel system is on the floor half-way between your left and right direct-field monitors, with its front facing forward and in the same plane as the direct-field speakers. From there, you can adjust the subwoofer's position until it is most "correct. " Another theory dictates that you should start with the subwoofer in a corner of the room's floor, where the adjacent walls can help the subwoofer maximize the amount of sound it radiates; and then you can adjust the position to suit your specific monitoring setup. [. . . ]