Search Reverb for Similar Items. Sold By. Message Seller. All electrolytic capacitors have been replaced with Elna and Nichicon capacitors, DC offset and Bias have been adjusted to factory specs and solder joints re-soldered. It has continuous power output of 50 watts per channel both channels, at Hz with no more than 0.
Features include:Versatile Triple Tone Control. Connections for two stereo tape decks, monitor switch for dubbing or copying from one to another. Independent power supply from preamplifier and power driver sections. Reviews of this Shop. Product Specs Listed 7 months ago Condition Excellent Used Excellent items are almost entirely free from blemishes and other visual defects and have been played or used with the utmost care.
Reverb Gives Your purchases help youth music programs get the gear they need to make music. Carbon-Offset Shipping Your purchases also help protect forests, including trees traditionally used to make instruments. Scan with your phone to get the Reverb app:. Oops, looks like you forgot something. Please check the fields highlighted in red. The sonic benefits are not subtle, turning this already great-sounding amp into a serious heavy hitter.
This includes output matched devices, thermal pads, op-amps, special MIL-spec silver mica, polystyrene and polypropylene capacitors, various premium electrolytic capacitors, new lab-grade power supply caps and more. Everything has been carefully chosen and tested for the best results. With this in mind, spending a few hundred dollars to refresh and seriously improve your Quad is one of the great no-brainers in hi-fi!
Consider what could you be doing to earn money while an expert works on your amplifiers instead! If in doubt, look at the above. The Stereophile reviews of the and are good places to start to get your head around what people were thinking when these amplifiers were released. Positive Feedback has a great piece , with lots of mods and other technical details. Yet another page lists more modifications and upgrades. Keith goes into detail about his own journey with the and breaks things down over two large and very detailed pages.
The first covers the original and its various iterations, the second covers the If you are looking for an amp to soothe the soul, I encourage you to listen to a Quad or Donations help me produce more great content. Interesting article. Why do you think that the Chinese boards are rubbish? With modern cad I would expect a better pcb layout to be achieved than the original along with better modern components than the original.
Have you actually tried the copies to justify the comment? Sadly, most Chinese hi-fi and audio boards are of low quality. Regarding parts, no, modern parts are not automatically better. Some modern parts are better, some are worse and the commonly available Chinese parts are usually terrible, especially capacitors and semiconductors. What pre amps would be a good match with the ? Any benefit in running two s and two preamps as a dual mono stereo signal chain? Hi, any high-quality, transparent preamp will work with a high-quality power amp like the It would certainly be interesting to try though!
The is magic with Aurum Cantus F speakers 4 ohm. I too am curious about the Chinese Clone boards. Hi Ralph, thanks for your question and I realise there are a lot of misunderstandings around cloned boards. Yes, I have looked at some clone boards and no, I cannot recommend them as a general rule.
I choose not to work on cloned stuff from China, read on to find out why. Consumer-grade Chinese boards contain generally low-grade parts of unknown specification and performance, in most cases non-genuine or fake semiconductors and are generally unqualified and of unknown performance. The original boards are well designed, easy to work on and repair, contain excellent parts of known quality, meet known performance specifications and are the real deal historically and electrically.
I guess we each have to decide which elements of that are important to us. For me, originality, parts quality and verified performance are critically important. The same can be said for fake watches. At first glance, they appear very similar but dig deeper and there is a world of difference between a fake and the real thing.
The devil really is in the detail. I mention fakes for good reason. What about the cost of all the other parts, aluminium, shipping..? Fake semis are highly problematic and exceptionally common in cheap Chinese gear. When one dies, you relace it with perhaps a genuine semi, and no longer have a matched pair, because the fake used a different die.
This causes circuit instability and round and round you go. You always want genuine semiconductors, without exception, so I would be replacing every transistor in one of these kits with the real thing, further adding to the cost. Also realise how inexpensive the genuine article is. Hello, thanx for your review. On the cons list, I would add bad protection from electrostatic shock.
I touched mine with our hoover and the main amps blew. I guess I was not careful enough, or I forgot to use an outlet with ground. Hi Lars, thank you for your kind words and comments. The and are earthed by design and superbly engineered in every sense, including safety. Many s and s I come across have been messed with and have reduced performance and safety as a result of poorly thought out and implemented modifications. This may be part of the story, or maybe there is something else going on there with the vacuum, wiring, mains outlet or amplifier.
Thanks for the detailed answer. Since the time I asked this I built a DIY tube amp and also ordered a class A headphone amp from the Breeze Audio site on Aliexpress, and was pretty impressed by the parts quality. I think there exist vendors in China who are deeply enthusiastic about audio and use high quality components, servicing both the local audio community as well as hobbyists in Europe, Asia, and the Americas.
In some cases this means cloning classic gear which is otherwise not available new anymore, at very reasonable prices. The other issue is that most end-users, hobbyists etc, for various reasons, are unable to distinguish between fake and real parts.
Many capacitors supplied with Chinese kits, for example, look like the real Nichicon MUSE, Elna Silmic etc, when they are in fact fake parts with far inferior performance. The same is true of many semiconductors and only careful testing or destructive analysis can determine the non-genuine nature and sub-standard specs of these knock-offs. Having said all of that, there is a smaller proportion of good gear from China, some of it really good, though it tends not to be the cheap stuff.
Hi Mike just wanting to know if you can recommend a service centre in Sydney for my Quad system. Hi Brian, great system! Feel free to call to discuss! It still runs well considering its age, got to admire British quality! Hi Brian, the number and business hours are on my home and contact pages. Look forward to chatting with you!
I have two Quad s. The first is a that I bought in It has been completely reliable over its 37 year lifespan and has never been touched internally. The second is a made in the 70s that I inherited from my father. It too has been totally reliable in my ownership although there is a sticker inside indicating that it was serviced sometime in, I think, the 80s by Quad in the UK.
Both these amplifiers have traveled the world with me. Unfortunately the older amplifier suffered some water damage when it traveled as sea cargo. It has been refinished a Toyota metallic black by a local car paint shop it was what they had! It looks fine but I prefer the original finish. At the same time I replaced the boards with the latest available boards. Both amplifiers are in regular use. As I have more amplifiers than I need I alternate the two s.
As has been noted these are superb well built amplifiers and you can listen to them for hours on end without getting tired of them. The I bought in is probably one of the best bang for buck purchases in my lifetime. Really enjoyed this article. I was so pleased with it. I had to part with the Quad a few years later and have mourned it ever since. Have you or any readers had experience with a driving a 6-ohm load?
Hi Jeffrey, glad you enjoyed the article. The is fine with 8 ohm loads and possibly lower, but the is better where more current is needed. This is all technically speaking of course, in reality, you can drive 6 ohm rated speakers with a and it will work just fine, just not quite as well as a What that translates to in sonic terms is a little less grip and authority.
Hopefully, your has been well refurbished, as many are not. My setup is the solid state Schiit Sega which is longer available. I have also tried it with a Tube preamp but found this combination to be a little bit too rolled off at higher frequency. The more neutral Sega is a much better match. Thanks James, the Saga not Sega should work well. Clean, neutral preamps like these will work well with the and A sin I know but very rewarding.
How do you think the would be driving a pair of JBL ? Also, I would want to find a suitable pre-amp that has a good phono section and a remote. Any suggestions? For specific advice, I suggest you visit my contact page as noted in the comment header and submit your question with a few more details there! After reading your article I would prefer to send them your way, but overall cost is a consideration. California that might be worth contacting?
One other question if I might. When mono strapping these amps, I heard that there were two configurations. Is this true, and do you know how McCormick Mod Squad used to do it? Thanks in advance, Chris. Hi Chris, thanks for your questions. Hi Mike. Is there anything that can be modified to have a deeper bass?
At lower volume the bass is lacking the punch. At first I thought that the speakers are the problem, but it seems not. Mids and highs cover the bass by a high margin at low volume. Is it ok to use an equalizer like APO and increase the amplitude for bass frequencies?
Will that damage in anyway the amplifier? What do you think? Hi, thanks for your question. Yes, I offer a series of improvements that extend performance in all areas, with customers typically reporting that they find the bass to be significantly improved. EQing bass can be risky, so use it with caution. Amps and speakers can be damaged due to exceeding the power envelope clipping or driver excursion limits.
Thanks Mike for the quick answer. Do you also provide schematics for doing these changes and at what cost? No problem! Hello Mike. I grabbed a at a local thrift shop today for Euros…. I want to use it with my old Spendor BC1s, and i hope that will be a good match. What is your opinion about using a cheap modern preamp with it? I was thinking about something like the Pro-ject Maia Pre Box….
Hi Steinar, great work getting the worlds greatest hi-fi bargain there! Use it with the best sounding preamp you can afford.
However, you when I. If the download the We know in S3, CA, save use an on the. Asked 6 Comment Cancel AnyDesk without.
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Free shipping Free shipping Free shipping. Sponsored items from this seller. Report item - opens in a new window or tab. Seller assumes all responsibility for this listing. Item specifics. An item that has been used previously. The item may have some signs of cosmetic wear, but is fully operational and functions as intended.
This item may be a floor model or store return that has been used. See all condition definitions opens in a new window or tab. Seller Notes:. No original box or manual. Number of Channels:.