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For reach, 10' should not be a problem with usb2 or 3. However, if you need more, get a usb extender. I am using a usb Acess usb2 extender (from the Amazon) running through 75' of ethernet cable. Computer at one end, and a Grace sdac at the other (stereo). Narry a dropout, pop, or click. The...

Yep, circuit mounted sockets seem to get frail over time. On top of that some of these grabby shield cable connectors are difficult to dissengage. Even crazier, some makers (like Outlaw) make stiff cables that clamp on to the shield/ground. CLICK! Oh dear, more solder repair to do. I really do...

XLR are fantastic, and probably the most stable electrical connection of signal over time. However, if you need something that will suffer repeated plugging/unplugging, then TRS rocks. It is self aligning, and you can plug them in blind. As for RCA, they are ok for connecting once (usually) then...

I suppose that in this case it really is a heat sink, vs a heat exchanger. It seems an odd design choice to heat up the chassis and compromise the cooling of internal components when they could have just rejected the heat to ambient with some better H/E fins. Even stranger considering that they...

I love the looks and performance, but I am dubious about those heatsinks. The fins are oriented horizontal, but free convection moves vertically. Add to that the narrow spacing (prevents development of good turbulence) and it makes the slots just decoration. I have a feeling that owners will be...

True that. I think that 14.5 to 14.7 is common for lead acid chargers. LA is the cheap route, and I already have multi-channel chargers. Unfortunately LA is also the heavy option. There is a warning on the Amazon page for the A07 that states "Cannot use industrial power supply...". What are they...

Oh, one concern: how much current can you run through one of those tiny barrel connectors? Seems like these little amps are begging for XT60 connectors. Overkill much?

hmmm...seems like 3 or 4 12v batteries in series with a multi-channel charger should work. Not joking, becauseI have actually started down this road. Ordered 2x A07 (2xa07 sounds like a damned tube) for my "portable" system. Front end is an smsl c200 or Fiio BTA30 (the latter will run off...

I appologize if this is old news, but I just stumbled across it. There is a bit of software called Alternative A2DP Driver that lets Windwoes transmit LDAC (or other codecs) directly. This assumes, of course, that the computer already has bluetooth capability. The software lives here...

The problem is that bookshelf full range speakers fell out of fashion years ago. If you can find a pair of ADS L980s, grab them! Klipsch had a cool bookshelf in their Paladium line. The P-17b I think. Not sure if it is still produced. It will play loud, and look gorgeous. The arena where...

Now I am leaning toward woofer cone breakup for that second harmonic around 2k. It corresponds nicely with the lump at 4k on the woofer response plot. There is even a small 3rd harmonic response in the right location. Not seeing any 4th harmonic response, though, even if I squint. Amir, time to...

hmmm, the plot thickens. Looking more like something in the design. I am not sure what horn drivers do near the driver resonance. Maybe it is normal? I would still feed it a clean tone and go looking for the source.

That distortion peak looks like a tweeter buzzing. It can happen due to a misaligned voice coil or loose components. Feed it a 2k signal and listen for a buzz or rattle. otoh it is on both sides, so very weird.

For the last 2 questions, Yes and yes. It is best to have an internal wall between the two chambers to eliminate strange effects due to channel imbalance. From that perspective it is just two of the same subwoofer design. Yes, the sonotube with a woofer at each end is a good example. You want...

Yes, push pull is what I did. The front woofer is mounted conventionally, and the back woofer is flipped magnet out. In theory this will cancel nonlinearities in the driver motors. In practice it makes one of the woofers really easy to wire ;-) You can think of this whole idea as 2 mirror image...

I am not sure if it is audible at all, but it would be at much shorter wavelengths. The idea is that the tweeter or mid gets moved fore and aft by large scale cabinet vibrations. Now that I think about it, it would not be that hard to measure. Not sure if it would show up in the traditional...

Awww, I wish I had spotted this discussion earlier. I used to design and build my own speakers and subs. At some point I thought of the bipolar subwoofer approach (I am sure that I was not the first) and built a breadboard box to try it out. It was amazing! Plenty of nice deep bass in the room...

In your case, I agree. I was guessing about 5 hz, but my calibration must be off. However, take a system with a light cabinet and a large low mounted woofer or PR, sitting on carpet. No longer a pendulum, but a block sliding back and forth. It is possible, I think, to hit frequencies where the...

Well this took a gloomy turn. I for one like it. If I were shopping right now, it would be high on my list. However SMSL beat them out of the gate with the new M500, so that is what I bought. One thing becomes clear: people are hoping for "something more" out of the next product down the pike...

The answer is, of course, it depends. The original idea behind the spikes is that they couple to the floor, preventing the speaker cabinet from vibrating counter to the cone motion. If this happens, one woulh have out of phase signal cancelling the "correct" signal. Probably works for a sealed...