A Terrific Tube Preamplifier From Korea, And A - Ultra High Fidelity ...

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Free Free Feedback Advice Advice original existing floor, walls or ceiling). My main concern is to stop sound and vibration transmitting though the floor and ceiling to the flat below. There is a window in one of the outside walls also. I am lucky in that my downstairs neighbour is very understanding and reasonably tolerant, but all the same I want to be able to play my drums when it suits me! I have an electronic kit which is actually quite noisy even when played through headphones, as there is hard thumping of the pads and the kick drum. I much prefer to play an acoustic kit, so to this end I need to construct a practice room. The existing bedroom consists of two external solid 9” thick external brick walls and two internal stud walls, one of which divides my bedroom from my living room and the other from the landing at the top of my stairs. I was wondering about putting in a new suspended floor by using wooden joists suspended directly from joist hangers secured in the walls with some form of thick dense absorbent matting material. The new floor would therefore be isolated from the existing floor by around 12” (and also will not touch the walls apart from where the new joists will hang). <strong>From</strong> this new floor I would then construct new stud walls about 12” or so from the existing walls. I am aware that the wooden studs 16 ULTRA HIGH FIDELITY Magazine should be offset so the stud at the front of the wall is not inline with the stud at the rear of the wall, and that they should have their own separate wooden plates. I was hoping to apply the same technique to the new ceiling too. I would then seal all the corners, floor and ceiling abutments using good quality sound caulking material so there are no gaps. I know I do not have the luxury of a concrete floor in the basement, but surely making a new suspended floor with the necessary dense wadding, etc. will be the next best thing. Oh yeah, I have to include a suitable door to the new room otherwise I would not be able to get out! Would it work? Any vibration passing into the new suspended joists from the use of the kick drum pedal would be absorbed by the dense cushioning around the joist hangers in the wall. Using the bass drum itself, the resonance being a very low frequency would be the real mother to keep under control. Once I have a sealed inner practice room and nothing else touches the original existing walls or ceiling (apart Participate in Free Advice! The Free Advice section was actually in our very first issue, and it is one element that makes UHF different from other magazines. It’s not that our ears are any better than yours, but we have, collectively, many years of experience. Perhaps we’ve learned something that can help you. You can submit your own question on line at uhfmail@uhfmag.com, but note a couple of conditions. Your question (and of course our answer) may be used in the on-line version on our site, and it may also be used in the print version. For those reasons, you need to supply your name and your home city. (Can you submit a question and specify that it not be used? Yes…but that’s a paid consultation service, currently costing $50/hour. Contact us for details.) from the new joist hangers), then can I assume that this method of soundproofing is the best way to go about things, apart from trying to play the drums in a vacuum!!? Would the low frequencies of the bass drum (and maybe a mate playing a bass guitar through an amp now and then!) still travel through the original walls of my bedroom and continue down into the flat below? What do you think? Kweku Graves LONDON, UK Kweku, first off we should mention that Paul did a newer article on soundproofing, which can be found in UHF No. 82. Of course the principles discussed are the same, and so are the two basic rules. (1) A vacuum aside, only high mass can stop sound transmission. (2) It takes only one simple soundtransmission path to short-circuit the most elaborate soundproofing measures and render them useless. But you know this already, because it’s clear you have done considerable research on the subject. Essentially you’re on the right track, because you know about using a suspended floor, and using high-density caulking. This approach will certainly work if it is perfectly executed, but we’re not sure it will be enough. Drumming produces sharp transients with a lot of broadband energy. If you’re using an acoustic drum kit, you can attenuate the sound a lot and still try the tolerance of your neighbors, particularly your downstair neighbors. We would throw in two more words of caution. We don’t know what is in your lease besides the requirement for carpeting the floors, but we would guess that doing major structural renovations would violate at least one clause, probably more. Even if you wanted just to knock down a wall to make a larger room, most landlords would require a very long lease, typically 10 years. In this case, it seems evident that this level of alteration would make it impossible to rent out the flat, except of course to another drummer. We would also be concerned about the added mass to the building structure. It seems evident that you would need to have an architect draw up the plans and make sure the addition will not overload the building’s shell. Those plans will be necessary to get a building permit, and even so there may be municipal zoning problems. We would look seriously at alternatives, such as using rehearsal space at a
school or community centre, perhaps in conjunction with other musicians facing the same problems as you. We can understand the inconvenience of travelling with musical gear, but that may be the lesser of evils. I have been following (and very much enjoying!) your recent pieces on getting music from computer. Much of my CD collection now exists as uncompressed files on a hard drive. I am using iTunes to handle the files and a Logitech Squeezebox to beam everything over to my audio equipment. I love the convenience of quick access to my collection from an armchair, and I am now exploring ways of achieving the same access to my vinyl collection. Some preliminary research reveals myriad ways to digitize albums, ranging from sound cards with analog inputs (which I expect would give less than optimal results) to professional-grade studio equipment that costs several thousand dollars. I am looking for a “middle-of-the-road” solution that provides good quality sound for a reasonable price (under C$500?). I anticipate a performance hit when converting from analog to digital and back to analog again and will employ my turntable for critical listening sessions, but am hoping there is a way to enjoy my vinyl collection when it is not convenient (or when I am feeling lazy) to get up and change records. One of your readers, Lloyd, noted in Free Advice in UHF No. 88 that he is converting his LP collection to 24/96 audio. Do you know how he does this? I also noted in UHF No. 87 that you used an Edirol UA-25 audio interface box and Audacity software to pull SACD analog from your Linn Unidisk to your computer. Would this setup be suitable for recording analog from a turntable as well? Gord Speksnijder PORT HOPE, ON Gord, Lloyd didn’t mention how he’s recording his LPs, but as for us we are indeed using an Edirol UA-25 USB interface box. An external box is less vulnerable to a computer’s vicious internal noise pollution than a sound card, and its street price in Canada is about $230. We A QUIET REVOLUTION INTRODUCING THE QUIESSENCE SERIES FROM ETI use the free Audacity software. We run the Edirol from the “tape out” jacks on our preamplifier. This setup can handle both 16/44 and 24/96 recording. For the moment your Squeezebox is limited to 16/44, which is of course Red Australian Innovation www.eti-research.com.au info@eti-research.com.au • The industry reference BulletPlug® RCA connector. • Hybrid Technology – an unparalleled combination of pure silver and tellurium copper conductors • Patented design. • Passive Ground Nulling Circuitry (GnC) eliminates ground induced reactances in the signal conductor. • Acts like a noise filter, reducing the effects of external interference such as EFI, EMF, RFI, and static charges. • Patent pending design. Exclusive North American Distributor Europroducts Marketing, Ltd. www. europroducts-canada.com Book CD resolution. The same is true of the present-day Airport Express. Technology does not stand still, however, and we have hopes for new chips, and therefore new gear, possibly over the next year. FREE ADVICE ON LINE! www.uhfmag.com/FreeAdvice.html ULTRA HIGH FIDELITY Magazine 17 Free Free Feedback Advice Advice
Page 1 and 2: No. 89 CAN $6.49 / US $7.69 RETURN
Page 3 and 4: Issue No. 89 Cover story: Two of th
Page 5 and 6: I HATE DOG EARS! (SORRY FIDO) We’
Page 7 and 8: I’m looking forward to the Simaud
Page 9 and 10: started talking to me and I was sta
Page 11 and 12: I’m using a Cardas Lightning cabl
Page 13 and 14: Leslie, it’s painful to realize t
Page 15: music from a computer via Ethernet
Page 19 and 20: ut the tone of the warning seems wr
Page 21 and 22: I remember when Israel Blume of Coi
Page 23 and 24: I may have mentioned that there is
Page 25 and 26: Thiel was back at CES, exhibiting a
Page 27 and 28: Touring the Salon there many turnta
Page 29 and 30: Below left: the Vivid B-1, designed
Page 31 and 32: tunately so, because computer softw
Page 33 and 34: The new ASW Genius 110 One of the i
Page 35 and 36: tisi. An hendreet nonsenim dit, ver
Page 37 and 38: scene, such as a video game page. T
Page 39 and 40: THE ANNIVERSARY COLLECTION: Issues
Page 41 and 42: Adding it to a CD player There are
Page 43 and 44: output of our Macbook Pro to the 30
Page 45 and 46: a quality switch with an array of f
Page 47 and 48: Leema Elements Phono Preamp Yes, wh
Page 49 and 50: Your System Belongs on the Wall Tar
Page 51 and 52: The t wo woofers and the midrange d
Page 53 and 54: Ut nisl erciduis at. Ectem dolobore
Page 55 and 56: INTERCONNECTS ATLAS NAVIGATOR Oxyge
Page 57 and 58: UHF14 POWER BAR Most power bars kno
Page 59 and 60: ed pepper to its music. Felix Hell
Page 61 and 62: Mozart: Sinfonia Concertante (XRCD)
Page 63 and 64: Gentlemen, I, Rachmaninoff, have ju
Page 65 and 66: painful scenes at home, and after a
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It is worth noting that although th
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announcement of impending marriage
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lending moment to arrive sooner tha
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that would have called for a retake
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any woman who is not married to som
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All You Can Watch for $8 It was Net
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The Magic Without 3D What’s domin
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Industry News Dan d’Agostino is b
Page 83 and 84:
Why do UHF readers start reading th
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