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Showing content with the highest reputation on 02/03/17 in all areas

  1. 5 points
    Updated input board. No mistake this time. Updated power stage board. Now we're getting somewhere! Final boards, transformer and box. Notice the extra shielding over the input modules. Had to shorten up the bus bars a bit to fit the larger Toroidy transformer. That is Spalted Rainbow Sassafras from the forgotten state Tasmania. Some gorgeous wood comes from that gorgeous state. Thanks Tassie. Thats about it. Except my new logo's which have to be attached.
  2. 4 points
    Item: Standard Australian approved power cables - some used Location: Pickup South Yarra during Business hours Price: $2 each + postage extra Item Condition: Excellent condition Reason for selling: Have surplus 50+ Payment Method: Pickup - Cash, Paypal, COD Only Extra Info: Don't waste your money on expensive power cables, these will sound exactly the same in your high end systems. Pictures:
  3. 4 points
    Hi All I wanted to post on my recent experience on a technical issue I had on an amp I bought brand new from Audio Connection 12 months ago. The amp developed a fault after 12 months of no issues and after discussions with Joe R, he replaced my amp with a brand new unit rather then make me wait whilst the fault was rectified. To say I was impresssed is an understatement! I read of many negative experiences with retailers/distributors and seldom do we talk about positive experiences. I was given the upmost support and respect throughout this process and it's a testament to someone who supports and believes in their product. Please dont turn turn this thread into responses with the opposite experiences. Just some honest feedback from a very happy hifi lover with trust and respect for the people concerned. There are some good people out there and whilst we all get caught up with pricing, ranging ect.... (me included), after sales support is often overlooked in our passion. Much appreciated to Joe and the guys at AC. Regards Dave
  4. 4 points
    People make various claims of that nature - even including power cables. One thing I haven't seen yet is a claim that vinyl records benefit from run-in. But I may have missed it. The problem is that these claims cannot be either proven or disproven. If you want to approach this in a scientific way, then the best shot is to apply what we know about our hearing sense: over time it adopts to the surrounding patterns. So if a DAC sounds different after a period of time, there's a good chance that this is because we have gotten used to the sound. If you prefer to speculate what could have happened to the printed circuit to make it sound different (and always better), then to my knowledge there are two types of components susceptible to ageing: tubes and capacitors. Out of the two, capacitors are way more likely to be found in a DAC, but even that is not guaranteed. The circuit designers must be really clever people to be able to anticipate how all of the capacitors in the circuit will change their performance in a few hundred of hours and optimise their designs for that. And pretty much all of them get it right...
  5. 4 points
    I cannot fathom the interpretation of this post as an 'ad' or 'touting'. The initial post is entirely reasonable, technically literate and fair opinion. I have also had similar experience with the brand mentioned; and some others that I won't mention for fear of being branded a 'brand basher'. Simple message; use quality caps, with an appropriate safety margin for both voltage and temperature, especially in the Australian environment with it's somewhat variable mains and weather. Simples...
  6. 4 points
    Amplifier #2: Problems noted: * Jamicon caps. AGAIN! * Rail Voltage was 76 Volts DC (with a precise 240VAC supplied) * Capacitor Voltage rating was 80 Volts DC (minimal overhead). * Capacitor temperature rating was 85 degrees C. * Horizontal heat sink fins. * Leaking capacitor gunk™ damaged the PCB AND resulted in the destruction of one output stage. Solutions: * Fit decent quality capacitors. In this case, Nichicons. * Fit higher Voltage rated caps. In this case, 100 Volts DC. * Fit higher temperature rated caps. In this case, 105 degrees C rated. Photos: A_1) Two visibly faulty caps. A_2) Measurement of a visibly OK cap. Note the ESR figure. A_3) Damage to the PCB and output stage from leaking capacitor gunk™. A_4) Measurement of the replacement caps. Note the ESR figure. Moral: Be very wary of Jamicon caps. Be very wary of caps that are fitted to hot running products, where proper attention to cooling of those caps is ignored. Be very wary of caps that are operated close to their maximum Voltage ratings.
  7. 4 points
    Jamicon electrolytic caps have been mentioned a few times in this forum. In the past few months, I've had two different amplifiers, from the same manufacturer land on my bench. Both use/d Jamicon caps. Now, the caps were bad enough, but the problems were significantly compounded by other factors. First, we start with amplifier #1: Problems noted: * Jamicon caps are not in the top tier of cap manufacturers. They are decidedly below average in my experience. * Rail Voltage was 62 Volts DC (with a precise 240VAC supplied via a Variac™). * Rated capacitor Voltage was 63 Volts DC. * Capacitor temperature rating was 85 degrees C. * Heat sinking consists of horizontal fins, rather than vertical. Thus, convection cooling was almost non-existent and radiation was the only method available. Heat is thus radiated inwards as well as out. * Leaking capacitor gunk™ (the trade marked term for the fluid inside electrolytic caps) has damaged the printed circuit board (PCB). Solutions: * Fit decent quality caps. In this case, Nichicons * Fit higher Voltage caps. In this case, 80 Volts. * It would have been preferable to fit 105 degree C caps, but these were not available at the time of service. * Fit larger caps, for an improvement in sound quality. Photos: 1) 8 main filter caps. 4 are completely destroyed. 2) Leaked gunk™ on the PCB. 3) Measurements performed on one of the caps that appeared to be OK. Note the ESR value. 4) Measurement of a good quality cap. Note the ESR value. 5) New caps fitted. 6) New caps fitted. Next up, amplifier #2.
  8. 3 points
    Just thought I'd put up my amplifier build. This amp was up and running around 6 months ago, but I've just put the final touch in it. Replaced my 1000va Nuvotem transformer to a Torroidy "Supreme audio grade" transformer. I'll post some pics of the process here. I have called this the "Zeus Audio - Simamp". I had some cast silver "Zeus Audio" name plates made for my Tsunami speakers so I thought to carry on the tradition with the other projects I build. Original speaker Logo. 3d printed wax, then cast in silver. Expensive logo. I started by reading the Bob Cordell book "Designing Audio Power Amplifiers". I produced a schematic using the best bits of the book. Decided to use a nice symetrical layout. Not because it sounds better, but because of my psychological tendancies. The amplifier was also tsimulated using the same "Ltspice" program learned by reading the book..and google. Voltage out (green). Power across 8ohm load (blue) simulated power acros 8ohm load Current though 8ohm load at max power before clipping. FFT plot @ max power 1000hz THD @max power 1000hz To be continued Cheers Simon
  9. 3 points
    Item: Sonus Faber Extrema Speaker Pair with Stands Extra Info: KLAPP AV Showroom Display Stock SOLD
  10. 3 points
    Tom Waits - The Black Rider 1993 LP on Island. 1993 was a great year for music. Waits' best work here, IMO
  11. 3 points
    Lounge is 75mm higher and has made some more improvement. Particularly in imaging and it has made the Beryllium tweeters sound much nicer at ear level-ish. Raised it 75mm (one cushion during testing) Two cushions (90 to 100mm) was too much and the sound stage scattered somewhat. Used offcut 3x2in pine from Bunnings and the lounges original feet, cost bugger all but my time. It is also much nicer to sit in for my 5ft 11in partner and 6ft 2in me, not so slouchy.
  12. 3 points
    You always know you have a good sound engineer when they walk from behind the glass into the recording room in the practice sessions to make sure what they are recording is like it really is. Your selection of an accurate audio system should follow the same ethos. But.........If you don't have walk through access to your source live? "Difficult it is" my Yoda quote for today. Answer see as much live acoustic music as you can. Especially those that are broadcast live to air or you can obtain quality live recordings of. The latter being the better. I know many may disagree but this worked for me. Buy the best headphones you can. For 10 years I listened through Stax headphones and a Bi polar class A pre that ran so hot you could fry eggs with it. All in glorious analog with Nakamichi tape deck & tricked out Ariston TT After that nearly every speaker I listened to sounded like minced puke. The most notable exceptions being a very high end Accoustat with JBl 15 inch bass drivers. A Klipschorn. Some custom 15 inch Tannoy royals with a cork front baffle. Quadral Titans and lastly Apogee mini grands. I was forever altered with French Champagne taste & little disposable income. I finally found a compromise I could endure and afford. Teac CD transport. Onkyo Digital 8800 120w amp with a really awesome internal discrete D/A that took up nearly half the amps internal real estate. Some Krix Di Apolito design 10 in 2 ways with Morel drivers in a sealed cab who's model name escapes me. Sweet sounding with warm enveloping bass.That system punched way above it's price point. I also got the lot at a stupid bargain clearance price. I was finally on my way to acceptable audio performance in the home environment. There is a revolution in audio I see evolving. There is the established large audio manufacturers fighting to stay relevant with the old and inefficient marketing models of manufacturer to distributor to retailer to customer. Then there is the small cottage industry headed by passionate mavericks who produce hand made audio that are not only high end but truly works of art.The likes of Volti Audio, The sound of the wood, Weston Acoustics. Once Analog These use the internet to market direct to customers. Saving a lot of middlemen but on the other hand making local auditioning difficult if not impossible. Often requiring a prospective customer especially os to make an expensive leap of faith. There will always be a place for the oldschool marketing model in the realm of home theatre & digital technolgies that requre mass manufacture to make them cost effective. In closing Listen to as much live music as you can learn as much as you can and audition as much as you can. Remember sharks patrol these waters. There are fewer of them but that makes em more cunning leaner and hungrier. Stay smart and stay safe & enjoy the music.
  13. 3 points
    love how people worry about a slight weight penalty.... just take a dump before your ride, problem solved
  14. 3 points
    DC-37 has been totally fixed by local tech Guru @Doncentric without requiring any assistance from the distributor. He has also been able to convert voltages on any unit presented to him. Don's abilities never cease to amaze me and has performed repairs which have stumped other techs. He has my vote for the "Best tech in the West" for HIFI equipment servicing. Sent from my iPad using Tapatalk
  15. 3 points
    Trevor (Zaphod) has been in the hi fi industry since around the time that Jesus signed up as fullback for Jerusalem so I would say he is giving you the good oil Gi.
  16. 3 points
  17. 3 points
    It should sound like the band,in all it's glory, is clearly playing in your room.
  18. 3 points
    Picture says everything. 22000uf 100v. Have 8 in total crammed in the chassis for 176000uF total for the power supply. Custom made Toroidy transformer. Highly recomended. 50v secondaries x sqrt2 = 70V positive and negative rails. Earth wire for shielding between windings. Encapsulated in resin and put in a polished stainless enclosure for even better shielding from stray emi. Here it is with my old nuvotem transformer. Cant be seen as it's under my diy emi shield of a cooking pot with nice copper bottom. Also note the amplifier boards are different. This is my second version with separate input boards and power supply boards. You will also see a soft start board on the side of the pot/transformer. That is definitely needed when dealing with a large transformer and copius capacitance. You will note the use of copper bus bar as the power supply rails and gnd . Overkill but it looks great.
  19. 3 points
    Here is the original pcb layout. I say original because this one had some mistakes which made the amp oscilate and destroy some transistors. Always the first batch has something wrong! The original boards arrived from pcb manufacturing (PCB Way) in China. Don't let the C word sway you, these are great quality boards. Boards showing back side as well. Note the power section has thick traces on the top and bottom layers for extra current capability. I have to give a thank you to "ostripper" from diyaudio forums for letting me copy techniques he used on some of his amp board designs. Not great photo I know. This shows the original boards populated and sitting on a large heat sink. Electrolytic caps are Nichicon Fine Gold and Panasonic FC. You will also note the transistors aren't the usual 3 leg BCE type. Those are Onsemi NJL1302D/NJL3281D. The D at the end means they have an embedded diode in the package. The diodes for 2 of the transistors are then used in the bias circuit for what is meant to make it have greater stability.
  20. 2 points
    Item: Yamaha PF-800 Turntable, immaculate, boxed w/ manuals. 3 cartridges, 100+ nice LPs Location: Penrith Area Price: $1500 ONO Condition: Excellent Description: Here we have a Yamaha PF-800 turntable in immaculate condition. It comes boxed with manuals. One of the finest turntables that Yamaha ever produced, with a fantastic float suspension system and a 2-part platter, consisting of an aluminium outer platter and a zinc inner platter (combined weight is a tad over 2kg). Basic automatic features, but very reliable (I could name a few classics which don't fare too well in the reliability department!). There are very few pieces of gear out there that actually appreciate over time: the PF-800 and the PF-1000 were never released widely, so numbers are scarce. Numbers in this sort of condition would be miniscule. The difference between the two models is very subtle: The PF-800's inner platter is Zinc, while the PF-1000's inner platter is Gunmetal. They also had different colour options. They're virtually interchangeable, quality-wise, and both are among some of the finest vintage turntables available today. You'll see plenty of discussions about these models online; many prefer it to choice models from the period, including the Linn LP-12. What's included: --- The turntable, boxed with manuals in fantastic conditon --- a Shure V15 IV phono cartridge, boxed --- a Shure V15 V-P phono cartridge, boxed --- an Audio-Technica AT33e cartridge, boxed ---Two well-kept crates of LPs. Nice and tight in the crate (but not too tight!). You're looking at 60 or so albums a crate, possibly more. They haven't been gone through as they're in storage, but you're more than welcome to do so. Reason for selling: On the move Payment Method: Pickup - Cash. You're more than welcome to test everything out, so take your time. Any questions, feel free to ask! Pictures:
  21. 2 points
    http://www.drive.com.au/motor-news/2017-alpine-a110-officially-revealed-20170228-gunlut.html?trackLink=homePageNews8 this could well be one hell of a car... will be interested to see how they price it here
  22. 2 points
    I just figured out the best thing about listening to Vinyl records . It's not the great sound with a little bit of crackle and pop , It's not the fact that i can listen to all the records I bought in the 70's and 80's . It's that they last about 20 mins which is about the same time it takes to polish off a stubby , so I only have to get up once ,
  23. 2 points
    The Easybeats, 1975, The Best Of The Easybeats Featuring Stevie Wright Albert Productions ?– BALP 10228. Love these guys, love J Albert- Albert Productions records.
  24. 2 points
    I can see the influence of GBS. Jim would be proud.
  25. 2 points
    Snap Pete, the 417 was also my first Sansui your in good hands Gareth
  26. 2 points
    I'm not a tech guy but in my experience every Hi-Fi component improves with running in, DACs, amps, speakers, cables etc. For example, my run in amplifier had one channel replaced on warranty. The image balance and tone made it unlistenable until it had over 50 hours on the new channel. It kept improving up to about 100 hours where both channels seemed to match again.
  27. 2 points
    I am not going to de-rail this post. I have made my suggestions.
  28. 2 points
    rantan the CD-S7DAC obviously has digital inputs with the extra DAC. Also has XLR outs which the CD-S7 doesn't. Apart from those differences assume their basically the same. My mate has the CD-S7 so could do a comparison one day to confirm. I've just put the CD-S7DAC into one of my main systems and will do a comparo with the CD-S8 hopefully this evening. I did a quick one a fair while back and preferred the CD-S8 by a fair margin at the time. Will be interesting.
  29. 2 points
    I have one of these myself. A very nice sounding cable and very well made too.
  30. 2 points
    Item: JBL 4365 Three Way Floor Type Studio Monitor Pair - Showroom Display Stock - As New Price: $12,990 Location: KLAPP AV, 72-74 Chapel Street, Windsor VIC 3181 Phone: Call us on 1300 668 398 Item Condition: Showroom Display Stock - As New Payment Method: Cash, Bank Transfer, Paypal, Credit/Debit Cards Extra Info: KLAPP AV Showroom Display Stock Perfect "As-New" condition Full warranty provided Colour: Walnut, Grille Color Monitor Blue Three Way Floor Type Studio Monitors More information here: http://klappav.com.au/products/4365 Pictures:
  31. 2 points
    Item: Sonus Faber Amati Futura Floor Standing Speakers - Showroom Display Stock - As New Location: KLAPP AV, 72-74 Chapel Street, Windsor VIC 3181 Price: $26,999 Item Condition: Showroom Display Stock - As New Payment Method: Cash, Bank Transfer, Paypal, Credit/Debit Cards Extra Info: KLAPP AV Showroom Display Stock Perfect "As-New" condition Full warranty provided Colour: Red Violin 3.5-way Vented Floor Standing Speakers More information here: http://klappav.com.au/products/amati-futura-floor-standing-speakers-floor-stock Pictures:
  32. 2 points
    This amps a keeper. I will definitely listen to it for longer than I spent building it.
  33. 2 points
    Thanks Anthony I would like to have added up the hours I spent in planning, reading, sitting on the computer designing, buying and building, testing, finding mistakes and building again. I think it would have shocked me as well. As you know half the fun is in the learning in the process and the other half is the sastisfaction at the end of it. This is "Deep end DIY"
  34. 2 points
    I agree, but I see 20 Metres of speaker cable as a potentially VERY serious problem, if low inductance/low resistance products are not chosen. That said, I agree that other aspects of the system could possibly be worthy of examination. However, first things first: And that means speaker cables MUST be addressed.
  35. 2 points
    Fantastic! Really "black" and hot. The blowing is often quite out there. Definitely influenced by Pharoah Sanders of the '70's, Archie Shepp & Sun Ra. Very soulful........but, not everyone will dig the massed strings or voices on some tracks. Fully "in the tradition". SQ is probably 7.5/10. Can get a bit congested when there is so much going on during some passages. Plus, each side probably averages over 25 minutes. A seminal release in my view. Just buy it & leap into the groove.
  36. 2 points
    I love an over the top build Simon. Nice stuff! I wonder how many people look at those photos and have a comprehension of just how much planning and effort actually goes into building from scratch like that. Awesome work...and your own circuit to boot...that's hardcore DIY right there.
  37. 2 points
  38. 2 points
    No, I have heard them with the Primare I32 amp. I actually got sold on the Silver 6s which I loved instantly for their detail, pace and timing when I started auditioning speakers with a Rega Brio. I was sold on them and would have been happy to go with them and was looking at a Rega Elicit which was all around my budget. When I started getting some prices the Silver 8s came into the picture. The reason I asked about Vincent equipment is that I was offered the SV237 as an alternative to the Rega as a shop I was dealing with could not supply that. They also offered the Primare I32 which was a little over my budget initially but after a bit of "negotiating" I was able to fit the whole package in on budget. I'm very satisfied with the deal I got from Atmosphere Audio in Adelaide.
  39. 2 points
    Horace Parlan - Happy Frame of Mind Another Heavenly Sweetness analogue pressing of a fine lp
  40. 2 points
    Giving this a spin while waiting for my Sooloos NAS to rebuild with bigger drives! When the final boom plays, they should be done. Ah good old fashioned CD, jeez they do sound good. Cheers, Jason.
  41. 2 points
    Great shot @Jake , must be tough having to work somewhere with such a great view. Another one from me, from a Sunday drive. Need to go and reshoot some places and do a better job.
  42. 2 points
    Donald Byrd - Chant Heavenly Sweetness Blue Note analogue reissue
  43. 2 points
    People keep saying this, but most of my LPs are superbly quiet and I've had many people comment that my TT setup was like digital only more resolving and open sounding.
  44. 1 point
  45. 1 point
    Midnight Oil - Breathe. original Euro pressing. probably a bit of an underrated Oil's album as it was quite different sounding to what went before and after. Almost introspective and laid back. One of those albums that does get better with more play time. The reissue would be well served to be spread over 3 sides.
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