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I've heard back from someone who also has Quad 989's and has tried adding Air Motion tweeters, and a subwoofer. His email reply is below. I'd be interested in your views, especially around his observation that he couldn't tell any difference.
Trevor - E-mail: trevor_loveday (at) hotmail.com
I am surprised he did not hear a difference. An easy test is to put the tweeter right up to your ear, once setup and music on, to verify all connections are good. After that I'd look into the capacitor value to start here, maybe it rolled off at too high and inaudible a frequency.
the cabinet displayed in that article is not our own design, it comes directly from Wilmslow Audio, see for example their large collection of cabinets for full-range drivers here. I'm afraid they do not supply schemes for their cabinets, as this stuff is for sale on their website. Try contacting them directly and ask for a price quote for the building plans, perhaps they'd be happy to sell these. Eventually cite our article, so that they can quickly understand which cabinet are you referring to.
Hope this helped somehow,
Arcam rdac or rdacII versus Rega dacr
I've read your reviews. I am setting up my system from scratch and It's difficult to decide on a DAC. I just bought a LFD LE5 with Harbeth P3esr speakers and I'll be using a recently purchased MacBook Pro. I will download my 1300 CDs, mostly jazz to the MacBook but would also like to stream from Tidal and other services of this caliber.
I would appreciate your suggestions.
Larry - E-mail: larryinbeijing (at) gmail.com
Hi Larry. Thanks for getting in touch.
A tricky choice – and you’re spoiled for choice at that price level. I think you’ll find a computer based system a revelation after listening to CDs. It’s just so convenient. The big danger is that it’s too easy to switch between tracks and end up “surfing” your collection rather than listening to it (I am often guilty of this).
As to the two DACs you mention, I suspect there’s not much to choose between them. The ARCAM will be a very good performer – I have listened to the irDAC extensively and always found it very businesslike - clear and transparent. I’m waiting for a sample of the new ARCAM DAC but don’t know when we’ll get it for review. I have only heard REGA DACs at shows where they sound good in REGA systems.
Reviews suggest a warmer sound than the ARCAM but I suspect the differences will be small in practice. I’d suggest trying to get hold of both and returning the one you least enjoy. It’s also worth thinking about facilities as these may differ more than ultimate sound quality at this level (do you want Bluetooth for example?).
Sadly no I can't - sometimes I wish I could.
Yours is the first email (and I've had probably a 100 from high-end manufacturers, designers of arms and cartridges and enthusiasts) that backs up the VTA claims.
However as I keep saying throughout the article that doesn't mean that some people/systems aren't sensitive. However as there is no scientific evidence or even credible theory as the why I am inclined to be skeptical until someone puts forward empirical evidence to the contrary.
The answer is obvious and you have the tools to perform it and at least add meaningfully to the knowledge pool on the subject. Simply do the experiment as described in the second part of the article - 100% as described and no cheating - and then post me your results.
I'll be more than happy to publish them. If you can persuade another company with similar views to repeat the experiment so much the better. If you wish you could supply the equipment and I'd conduct the experiment myself. I'd be very happy to be the first person to publish empirical evidence for the importance of 0.001 degree of VTA change...
Then there's the practical side of things...
Looking at your arm design the changing of VTA will have a major effect on VTF at the same time - so for every record you play you need to alter VTA and VTF (to correct). You need to do this before every play - no good writing down favourite settings unless your room is air-conditioned to exact temperature and the system fully up to working temp - i.e. cartridge - this heats considerably during use.
So, for all but a few obsessives the VTA question - even if audible - quickly becomes irrelevant.
And lastly - if you take a fine arm design and strip off all the bells-and-whistles - arm-lift and especially VTA tower then you will hear the difference - all the time - with every record - without having to spend 10 minutes faffing about before you put a disc on...
Dayton Audio AMTPRO 4
I found an article online from November 2014 in which you tested three tweeters with your Quad ESLs and achieved a beneficial result. I have a pair of 989s and am inspired to try this from your article. I just have a few questions that I hope you can help with:
Let me respond in the same order as your questions.
quoting directly from the Quintet Mono manual:
Quintet Mono uses a strapped output to deliver the same output signal from both sets of pole
pins. This effectively eliminates the need for mono-specific equipment, making it possible to enjoy
true mono reproduction on any stereo playback system.
I assume you still have to use a pair of Lundahl 1681 transformers. If in doubt, contact Lundahl directly at http://www.lundahl.se/.
Hope this helped,
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