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  1. R

    Is heat the standard by which to judge wher an amp is handling a 4 ohm load?

    There's only one set of binding posts. I've got 2 of the amps so I use one on my 6 ohm speakers and one of my new 4 ohm passive subwoofers.The gain is set at be a bit below maximum on the subwoofers amp and about 60% on the speaker's amp (for volume matching). In use, both amplifiers reach...
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    Is heat the standard by which to judge wher an amp is handling a 4 ohm load?

    The amp says "8 ohm (nom)" and "4 ohm min" on the back. I assumed this to mean "designed for 8 ohm loads, please don't go below 4 ohms!" It's a low production, pro amp made by a small Australian company in the early 90s. Nice little thing, but the only search result you'll find for it is the...
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    Is heat the standard by which to judge wher an amp is handling a 4 ohm load?

    The amps have bodies made of heatsinks and are in open air, so temperature isn't a concern. I'm just seeking a metric to judge load stress. If an amp is warm (not hot) to touch, is it safe to assume that it's not going to kill itself from overworking a 4 ohm load?
  4. R

    Is heat the standard by which to judge wher an amp is handling a 4 ohm load?

    I'm using an 8 ohm nominal amplifier on 4 ohm speakers. Is the heatsink temperature the best way to tell whether the amp is happily taking the load?
  5. R

    CD player makes a spinning noise when the laser moves

    It is. it comes from a radio station too, so it may have had extended use. Not my only player, but it's cool enough that I'd prefer to use it as my main
  6. R

    CD player makes a spinning noise when the laser moves

    Denon DN-C635 The transport is nice and quiet when spinning regularly, but when the laser moves it makes a "spinning/reading" type noise briefly. Particularly between tracks and at the end of the cd Is there any particular part in the transport which may need attention? The sound is so...
  7. R

    What's needed in a music subwoofer?

    I've tried them between 0cm and around 1.5m. The frequency response changes, but I'm still unhappy with the bass. They may benefit from being moved closer together or further apart, but that's something to do when I recover from my injury. I'll be getting a sub to cover me below 40hz anyway. I...
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    What's needed in a music subwoofer?

    Just a 2285. Nothing special, but should be sufficiently powerful. The bass on an Ikon 6 mk1 dies at around 40hz (as measured by stereophile), which pretty much necessitates the need for a sub anyway. The "flub" may just be caused by the absence of deep bass that I'm used to hearing on my old...
  9. R

    What's needed in a music subwoofer?

    Same problem on a Marantz though. The components inside the amps are quite serious, and the specs are good
  10. R

    What's needed in a music subwoofer?

    The ikon mk2 have a rear port. mk1 have flared front port only Currently an anonymous pro-audio (rack mount) amp. Not a brand that can be found online. 130wpc and a big power supply. I've got two of them, so I'll either monoblock them for 400wpc, or (more likely) bi-amp. Dali gives a...
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    What's needed in a music subwoofer?

    Dali Ikon 6 mk1. Nothing special, but sound great to me (I love dali sound), except for the bass flub. They might be a bit small to produce bass into a large room. The complete lack of room treatment and the lack of effort in setup won't be helping with my bass response, but I wouldn't expect...
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    What's needed in a music subwoofer?

    Large room, have plenty of room for the sub. Budget isn't determined- but I'm not yet on the look out for a specific model recommendation- just an idea of what disqualifies subs for music. I look at the classifieds every day, and it's useful to be able to immediately rule out subs based off a...
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    What's needed in a music subwoofer?

    Side question- I want to power my speakers from my monoblocks, not the speaker jacks on the back of the amp. Do I need to buy a subwoofer with a high-pass RCA output?
  14. R

    What's needed in a music subwoofer?

    That's ported 12 inch? Does it sound tight? I want nice and tight, musical bass
  15. R

    What's needed in a music subwoofer?

    No smaller than 12 inch? preferably sealed? My speakers produce some bass, but it turns weak and flubby pretty quickly, so I'm in the market for a sub. What basic parameters can I use to quickly weed out the unsuitable subs? Fairly large space and I don't want to spend a fortune- just replace...
  16. R

    Solutions for dust free stereo, vinyl setup

    You could try an "air purifier" type product. They constantly circulate the room's air through a HEPA filter
  17. R

    Tweeter crackle, now sibilance- real or imagined?

    I was doing waterfall comparisons as I test fitted acoustic treatment (ie- near-randomly placed insulation batts around the room). The difference between measurements is the important factor. For the final measurements I'll use a CD the only way that I can think o a tweeter turning sibilant is...
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    Tweeter crackle, now sibilance- real or imagined?

    Yeah a CD will max out at 22.05khz. My hearing maxes out at around 17-18 khz. This basically renders the ribbon tweeter useless, as it starts to cross over at 14khz. I'm feeling fairly sure that sibilance is a recording artifact rather than a playback issue. I can't blame the speakers for...
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    Tweeter crackle, now sibilance- real or imagined?

    At the time I was just using a crappy laptop at Room EQ Wizard. Henceforth I'll switch to a macbook (presumably better soundcard) and confirm it occasionally against a sweep off a CD. This CD has a number of simple test files, including a frequency sweep
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    Tweeter crackle, now sibilance- real or imagined?

    Fresh day, fresh mind. From what I can tell, sibilance is caused from a rush of air coming through the singer's teeth while saying "s", "sh", "z" sounds, causing a peak in sound at a certain frequency. The frequency that it occurs varies for different singers, due to different teeth. Thus...
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    Tweeter crackle, now sibilance- real or imagined?

    I've been doing some frequency sweeps for room treatment and decided to do a sweep up to 30khz (out of curiosity). Towards the higher frequencies it put out a crack at one stage. Maybe something in the source chain can't handle past 20khz. Even though it measures fine at the usual 20-20khz...
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    Vertical bi-amping. A few questions

    So does anyone know the answer to my original questions? Do amps mind seeing a wildly different load on each channel? Is there any technical reason why it might be beneficial to use two entry points through the crossover, rather than power treble/bass from the same connection?
  23. R

    Average Age Here?

    32, but my body feels like I'm 72
  24. R

    Vertical bi-amping. A few questions

    I own 2 identical amps and it's easier to bi-amp them than bridge-mono them. I don't really feel like going through the effort of bridging them The reason that I prefer vertical to horizontal is 1) I already own 2 of the same amp. I'm not interested in putting tube on tweeters, SS on woofers...
  25. R

    Vertical bi-amping. A few questions

    I have my own reasons to vertical rather than horizontal Any thoughts on the original 2 questions? There are various theoretical benefits of bi-amping (double the PSU, using different amps etc), but I'm specifically curious about whether there's a benefit at the crossover, and whether the amps...
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