Recently I started updating my sound and home cinema system. Most of it of course I bought from different shops, but some things I like to do myself. It saves money sometimes and counts as a hobby. What did I do? Well, I didn’t have enough time to design and build my own amplifier or another pair of nice speakers, so I ended up making my own speaker cables. What’s so special about that? You just get some cable, strip the ends, put it in the screw terminals on the speakers and the amplifier and you are done, you say. Not when you try to achieve high performance. Here is what it looks like.
It isn’t very difficult to make such nice looking cable and it saves money. Continue reading “Hi-End Speaker Cables”
Two years after the beginning of my MLTL speakers project with Jordan JX92 it has finally come to an end. I made some finishing touches but nothing significant. The speakers now are freshly painted, has new spikes and second pair of terminals are added for choice of connection schemes. The photos following show the finished speakers.
Continue reading “MLTL speakers with Jordan JX92 – part III – finishing touches”
My MLTL speakers project with Jordan JX92 was waiting for final touch with some paint or veneer, but it ended up with HiVi Research RT1.3 ribbon tweeters instead. As good as JX92 are, we all know that there is nothing perfect. It was absurd to think that 4-inch driver is capable of reproducing 30Hz perfectly and it is the same with the high end of the audible spectrum. That is why I decided to add ribbon tweeter to improve the highs after I cut the bass port to improve the lows, sacrificing those below 40Hz. The good thing is that I chose project which allows me to add second driver – second generation 35″ MLTL. Although I didn’t use Aurum Cantus G2 as Jim Griffin did, the final result is OK with me for now. The photo below shows the tweeter already mounted in the speaker. Its front panel isn’t the most beautiful but at least it sounds good.
Continue reading “MLTL speakers with Jordan JX92 – part II – adding ribbon tweeter”
After a long pause it is time for something new in simple my web site. At one moment in time I decided to make some good speakers, which will be pleasant for listening and at the same time cheaper than a small car like those you can buy in audio shop. I chose the notorious JX92s by Jordan. This small driver is widely used in DIY as well as commercial speakers. After half year thinking over countless enclosure designs I ended my search at Jordan’s website and its second generation 35″ MLTL.
Continue reading “MLTL speakers with Jordan JX92”
The following article is devoted to a HiFi headphone amplifier project of mine based on BurrBrown’s (Texas Instruments company now) integrated circuit TPA6120A . This IC consists of two high power operational amplifiers in one package. Both amplifiers have separate power supply pins, placed symmetrically on both sides of the package so developing a high density PCB will be easy. TPA6120 has impressive parameters, which make it fit the usage mentioned in its datasheet. The main parameters as follows:
- 80 mW into 600 Ω From a ±12V Supply at 0.00014% THD + N
- Current-Feedback Architecture
- Greater than 120 dB of Dynamic Range
- SNR of 120 dB
- Output Voltage Noise of 5 μVrms at Gain = 2 V/V
- Power Supply Range: ±5 V to ±15 V
- 1300 V/μs Slew Rate
- Differential Inputs
- Independent Power Supplies for Low Crosstalk
- Short Circuit and Thermal Protection
Continue reading “Headphone amplifier with TPA6120A”