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  1. Z

    Best Sounding In-Wall Speakers? In-Ceiling Speakers?

    How, Ron, did this turn out? I'm considering a pair of in-ceiling speakers to act as left / right surround speakers in a 5.1 set-up where I cannot use floor-standing / book-shelf speakers. The search identified PSB C-LCR and C-SUR - as well as the triad range - as options so it'd be good to get...
  2. Z

    Time aligning subs to main speakers

    I'm not too sure what, specifically, you're trying to say here (apart from the bit about the swarm which I do get). Is it that travel time to the listening position is unimportant or ...?
  3. Z

    Time aligning subs to main speakers

    I’m after some advice on how to think about t time aligning subwoofers to main speakers. Two papers that have informed my thinking are the http://www.acousticfrontiers.com/guide-to-bass-optimization/?utm_source=CTA and http://www.soundoctor.com/whitepapers/subs.htm. The latter puts forward a...
  4. Z

    All New Elac Adante AF 61 Floorstanding Speakers > Giant Killers?

    Have you had a chance to hear the JBL 708 speakers, and, if so, then how do these speakers compare? (I'm after a pair of standmount speakers for a large family / lounge room that will complement an existing swarm of subwoofers. No room treatment at first reflections so off-axis is important.)
  5. Z

    Acoustic Frontiers presents "The Bass Optimization eBook"

    Rationale for high-pass the main speakers? @Nyal - I'm interested in the rationale for the general recommendation to high-pass the main speakers (given the context of the Geddes model in which the mains are run full range). Is it that with identical mono subwoofer sources it's much simpler to...
  6. Z

    Acoustic Frontiers presents "The Bass Optimization eBook"

    Great e-book. I’m interested in set-up for a single listening position for stereo music. My reading of the e-book suggest that the recommendation for this situation is that a) sub-woofers are most often needed to get full range reproduction and b) just two subwoofers are needed (as we’re just...
  7. Z

    Search for speakers

    A bit of history. We have a large 7m x 8m x 2.5m kitchen / lounge room with an audio-visual set-up. The set-up has always been 2-channel although in recent years there have been a few small subwoofers squirreled away to help smooth bass response. We’ve had some Unity Horns with Bass Bins set-up...
  8. Z

    JBL LSR708i?

    Has anyone heard the JBL LSR 708i? I’m after a replacement for some DIY horns and considering these as a derivative of the JBL M2 (which is too expensive for my budget). Other alternatives looks to be the JBL 4429 or, on discount, 4365 but am leaning towards the 708i. The speakers would sit in a...
  9. Z

    Destructively Driving Modes

    Michael Great thread. So, basically, you’ve high-passed the main speakers and then have a fleet (of two) subwoofers that are low-passed at 80Hz each with a mono-signal. And the approach has been to get as smooth as possible response in the bass via positioning on front / back walls before...
  10. Z

    EVS modified Gustard X20/Gustard X20 thread

    How, if at all, do you get i2S into the DAC from a (Windows) PC source? Does it work with the Pink Faun i2S PCIe Card?
  11. Z

    EVS modified Gustard X20/Gustard X20 thread

    Interesting thread. How does the unit perform for PCM? (Most of the detail seems to be on native DSD or PCM to DSD upsampling) Is there a path to getting i2S input from a (Windows) computer source? And is there an ASIO driver to allow use of HQPlayer / NAA?
  12. Z

    Roon absolutely sucks for classical

    Yes, Keith, JRiver can act as a digital cross-over. You can either do this via the inbuilt parametric EQ or via convolution of filters such as those from Acourate (done either via the native JRiver convolution engine or a VST plug-in). I've used - with good success - the native convolution of...
  13. Z

    How to address too much gain in DAC / power amp set-up?

    Keith - My concern with this approach is that the signal to noise ratio will be impacted given that the unit manages analogue volume via controlling the output voltage of the D/A chip. The maximum SNR is 125dB for the unit so if I need 40dB of attenuation before fine tuning with digital...
  14. Z

    How to address too much gain in DAC / power amp set-up?

    Keith - Thanks. The e18 has analogue volume control which, as I understand it, sees the voltage output of the Sabre DAC adjusted and I'm using the mix of analogue / digital attenuation as you described. My concern (to be validated) is that SNR reduces at low volumes which has led me to the...
  15. Z

    How to address too much gain in DAC / power amp set-up?

    Too much gain. Yes, I’ve got the common issue of too much gain in my computer-based stereo system. The set-up involves ExaSound e18 DAC feeding power amplifiers that drive main amp with a full-range signal to Gallo Strada 2 speakers and a second amp that drives low-passed passive subwoofers. To...
  16. Z

    The Room Dilemma

    Bass response and speaker position Thanks. A couple of more specific questions as I think through the issues related to the larger room. Is it correct to assume standard glass windows are transparent to bass frequencies? The reason for the question is that the larger room has a large set of...
  17. Z

    The Room Dilemma

    I look with envy at the great rooms that pervade this forum. My situation, however, doesn’t allow for a large dedicated room and I’m after help as to whether to pursue with a set-up in a small (16’x12’) semi-shared room or migrate to a large (23’ x 27’) family area. The current set-up is in a...
  18. Z

    Understanding Coupling/Decoupling - with particular reference to loudspeakers

    I've got a similar situation and, with bare feet, it's dead simple to feel the floor vibrating when music is playing. The (old) floorboards also creak and flex so external vibrations to the speakers must also be a factor. Isolation seems like the right anser - how would something like...
  19. Z

    The Cleaner is coming . . .

    Your update caught my attention as a user of acourate [for digital x/o and room eq. purposes]. What is your feeling about the cleaner after extended time with the approach?
  20. Z

    Speaker distance from front wall - audiophile vs studio?

    The standard audiophile set-up is for speakers well out from the front wall (presumably to reduce the frequency related to rear-wave cancellation). A lot of professional studios, meanwhile, seem to have monitors either against the front wall or soffit mounted (presumably to remove rear wave...
  21. Z

    Digital x/o with A/V Sources

    Is it correct that the sole measure of time alignment is the overall frequency response? Or, put another way, if one gets a good overall response via tinkering with phase of individual subwoofers then is there anything to be gained by individual time alignment?
  22. Z

    Digital x/o with A/V Sources

    Xicila FIR Filters That’s interesting – and the bit about minor phase differences to smooth response makes sense. My rough estimate is that the difference in travel time will, at worst, create a 10ms lag (the furthest subwoofer is 3.5m further from the listening position than the main...
  23. Z

    Digital x/o with A/V Sources

    I’m after advice on how to best incorporate a digital cross-over into a system that has a mixture of audio and video sources. The system comprises a range of A/V sources (CAPS | Apple TV | TiVo) with video sent to a TV and audio sent to a traditional DAC | Pre-Amp | Amp | Speaker chain. All this...
  24. Z

    The ***Unofficial*** Multichannel DAC Thread

    Understand. One idea might be possible to use Dirac to do room EQ filter and Acourate (or something else) to do the cross-over filter - with the convolution software that allows a bank of filters.
  25. Z

    The ***Unofficial*** Multichannel DAC Thread

    Michael Ah. I’m struggling with a similar issue in our family room. My current thinking is to build a dedicated convolution computer that has an attached multi-channel DAC / audio interface. This would be based on Windows / AcourateConvolver with filters that encompass cross-over and room...
  26. Z

    The ***Unofficial*** Multichannel DAC Thread

    Michael I’m struggling to visualise how your system is set-up given the Total DAC and, now, e28 DAC. Are you using the Total DAC just for the main speakers and e28 DAC just for the subwoofers? And where is the volume control? It’d be great if you could elaborate on the system design as I’m...
  27. Z

    Digital correction: Why is there resistance?

    I find hard to believe that a state of the art digital playback system / room won't in the future have some form of digital room correction (along with room treatment and speaker / room location optimization.) You seem to imply that digital correction incurs other problems. What's the...
  28. Z

    Digital correction: Why is there resistance?

    Wow – it’s interesting that this topic has elicited such an enthusiastic response. I don’t have the room, budget or equipment of others but have tinkered with DSP over the past 5-years (see signature). My take is that digital room correction is just another tool in improving room response. It...
  29. Z

    Active cross over resolutions

    My music system uses sees a 2-way digital cross-over using JRiver convolution based on Accourate filters and converted using the ExaSound e18 DAC. All this works exceptionally well. That said, it’s not for everyone as it’s difficult to incorporate multiple sources and reliance on a single...
  30. Z

    DEQX HDP-4. Who has one ??

    How does it fit into your system given the analogue source(s) and pre-amp? Are you feeding it with the pre-amp output? Or as an input to the pre-amp for digital sources? If it's the former then is resolution maintained at low volumes? Zydeco

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