M-Audio BX5 D2 Studio Monitor Review
A Closer Look at the M-Audio BX5 D2
Here’s a look at the electronics behind the BX5 D2. Each speaker is bi-amplified, which means it has separate amplifiers for both the high and the low frequencies. This type of design is much more expensive, but it produces the cleanest audio signals as interference between the high and low frequencies are better isolated. According to the specifications, the low frequency amplifier is capable of producing 40w while the high frequency amplifier is capable of producing 30w. This gives us a combined 70w of total power.
The Class A/B bi-amplified design dedicates separate power amps to the high and low frequencies—providing ample headroom for even the loudest and most dynamic of mixes. Combined with a finely tuned crossover, the design ensures that each driver only delivers the frequencies that it can reproduce most efficiently, resulting in tonal accuracy and cohesive sound across the entire frequency spectrum.
Taking a closer look here, it looks like M-Audio is using 3x ST 4558C opamps in each cabinet to drive power to the drivers. These are fairly common, fairly inexpensive opamps used in a ton of audio products on the market. It would be nice to see higher end opamps being used, but for the price M-Audio is asking for these things, it doesn’t seem likely.
Oh my… what are these? KYS Chinese capacitors? Never really heard of these. Would’ve liked to see WIMA, Nichicon or Nippon Chemi-Con, but again, at the price M-Audio is asking, that’s a bit unrealistic. I’ll know where I’d look if something goes wrong.
Here’s a look at the transformer. A toroidal transformers would’ve been preferred here as they generate lower EMI, but M-Audio’s design isolates the transformer from the rest of the electronics, so interference shouldn’t be a problem.
Here’s a look inside the cabinet. Overall, a very clean, very well thought out design.