![]() Both tube amplifier projects use EL84 / 6BQ5 tubes and the earlier one used a ECC802S driver while this one uses 5751 driver tubes. It has more than a casual similarity to the first Push-Pull EL84 (6BQ5) Oddwatt project from nearly two years ago. This project is related to the other tube amplifier projects I have posted. Overall, I am really happy with this acquisition.Poddwatt: 5751 SRPP / Push-Pull EL84 (6BQ5) Tube Stereo Amplifier I needed some good audio grade solder and it was very easy to work with, in particular the rows of resistors and multi pin components. I used Fire Metall Eutectic Solder from the DiyAudio Store and I think it was a factor in a successful build. I had been using an entry level Parasound pre amp and phono amp, the Elekit TU-8500 sounds noticeably better even with minimal burn in time. This is with the supplied tubes and op-amps, after burn in is complete I'll swap in Gold Lion tubes and 2227P op amps. I'll leave the sound descriptions to the more experienced audiophiles, but suffice it to say everything is clearer, more neutral with stronger bass and sublime mids, especially female vocals. So far the burn in is at about 10 - 15 hours and it sounds really good, with the understanding the capacitor upgrades (6x Mundorf) will perform best at around 100 hrs. I took my time and it worked perfectly on first power up. Besides having some experience soldering electronics (14 yrs ago) this was the first kit I've built. Assembly instructions are very clear and leave nothing to chance. This kit is designed and presented with the precision the Japanese are known for. Great preamp, I reco.Ĭommunication prior to my purchase was good and the transaction was easy. ![]() I only wish it had one more set of RCA inputs however, so I could simulataneously hook up all my stereo gear at once including an HD radio. Any way you slice it, it's a great sounding preamp with a clean, robust circuit design and a pretty good phono stage as well with the ability to swap its opamps to change the phono's flavor. I can tell you it is rock steady and maintains a very clean, accurate, transparent sound whether you stick with all stock parts or substitute some of your own, much like how Elekit gives you an AMTRANS resistor option. There is no reason to have to sub anything, really. In fact I found it somewhat difficult to source parts of higher quality than what is originally supplied. However, all parts supplied are well-considered and of very high quality. Like any kit, there are opportunities to substitute your own parts if you like to experiment with the resulting outcome of sound which I did in an attempt to make it even a little warmer, "tubelike" or vintage HiFi sounding. Try listening to something like a SACD player through it and you will be impressed with its detail retrieval, fleshed out bottom end and airy highs. It is neutral, transparent, and very easy to listen to over extended periods and not classically "tubelike", warm or even sterile or clinical for that matter. I found it to be extremely transparent if your source, power amp, speakers and placement, cables and interconnects are up to the challenge. At the normal unity gain setting, you'll notice you'll have to really crank the volume to reach your desired spl, but it's ok, because you have the 3x gain option as well and it maintains its tight, fully-fleshed, focused control on sound reproduction even when pushed past a 2 'o clock setting on the volume dial on normal unity gain setting. What struck me is the cleanliness of the sound even at high volume with a complete inaudibility of hiss. This is a great kit, and a fun build with decent instructions. RIAA equalization: +/- 0.5dB tolerance (20Hz - 280kHz).Frequency Response: 2Hz-70kHz / 2Hz - 280kHz (-3 dB).Dimensions: 252 x 73 x 270mm including projections.100/115/220/230V input voltage selectable during assembly.DIY friendly PCB with room for larger coupling capacitors.Low noise Opamps using sockets to allow for the easy substitution of alternative Opamps.Precision RIAA equalization (CR not NF). ![]() It's a perfect match for the TU-8200 power amplifier. Switches are offered for MC/MM cartridge selection and a unity gain toggle switch for use with sources that already have enough gain. There's also a 3.5mm jack bound to Line 3. The rear features a pair of RCAs for each input of Line 1, 2, 3 and Phono, and pre-out. The front features a power switch, volume control and 4 way input selector (Line 1/2/3/Phono). The TU-8500 is an exceptionally well designed pre-amplifier kit including phono stage.
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