Wolverton said:
Hi Dave
Do any active or powered speakers have a DAC onboard? I like the idea of less cable clutter but I don't need the extras that the Q Acoustics deliver. (By the way I liked the Fii0 D3/ Studiospares S4 you suggested a while back, for TV . I'm passing them on now.) Do the Behringer MS20s fit the bill?
Thanks.
True active speakers such as the little SN4s are generally separate self contained devices, putting a dac onboard is childsplay but when used for stereo there is a problem.
Modern dacs take time to process the incoming data stream, often introducing 'buffering' to reduce jitter or in some cases reclocking entirely. This will delay the signal, often by an unspecified amount that varies according to circumstances and partnering equipment, not a problem with normal dacs as the incoming data stream is stereo, so both channels are delayed by the same amount.
If you put a dac handling just the left channel in the left speaker and one handling the right channel in the right speaker, there is every chance that they delay each channel differently, messing up the stereo.
This is a well known effect and is called 'latency', it can be overcome and often is in professional applications, but it is expensive. It is possible to use a 'sync' cable between the two speakers to keep the dacs in 'sync' but again expensive and fairly rare. One of the least expensive models that syncs separate dacs are the remarkable Monkey Banana Turbo series.
The most common method of adding a dac is to put it, along with some basic pre-amp functions into one speaker and connect with a line level analog signal to the second speaker, the infamous AVI ADM9/10 is of this type, some also require a data cable in addition to the signal cable, the Yamaha NX-N500 for example.
This 'master/slave' configuration is not that cheap to implement in proper active speakers but is very cheap and easy to do so in powered systems where a two channel power amp is fitted into the 'master' with the 'slave' connected by a length of regular speaker cable. Good examples of this are the Q Acoustics BT3, the Audio Engines and many others.
Some, myself included, prefer proper actives to powered speakers but for those unfamiliar or unconvinced of the advantage active designs have over powered models, the aforementioned Audio Engine and Q Acoustics models are a reasonable place to start.