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Post by MartinT on Jun 11, 2020 22:46:59 GMT
Putting my speakers on Townshend Podiums did a great deal to tighten and improve the bass and load up the room a lot less. The modes are still there but not nearly as annoying now.
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Post by user211 on Jun 11, 2020 23:46:28 GMT
One thing that is really useful is a simple online signal generator.
Why?
Just move through the audible frequency range and listen for break up of the pure tone you are feeding your system. If it breaks up at any frequency i.e. doesn't sound pure you have a problem.
You have to do this slowly or you will miss issues. It's best to calculate likely resonance spots first.
If it's narrow band and an inherent problem with the speaker, PEQ it out with a steep narrowband notch.
You maybe in for some nasty shocks if you do this.
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New DACs
Jun 12, 2020 7:23:23 GMT
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Post by Clive on Jun 12, 2020 7:23:23 GMT
A tone generator in addition helps with fixing rattles in the room! It's surprising how many there can be.
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Post by user211 on Jun 12, 2020 8:22:03 GMT
A tone generator in addition helps with fixed rattles in the room! It's surprising how many there can be. Definitely. I went to visit Tom (montesquieu) and played some of my bass heavy stuff. Floorboards and other stuff soon shaking... but it was quite loud. |
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Post by Deleted on Jun 12, 2020 8:43:39 GMT
You survived the Tannoy's then Justin?  |
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Post by Clive on Jun 12, 2020 9:28:30 GMT
A tone generator in addition helps with fixing rattles in the room! It's surprising how many there can be. Definitely. I went to visit Tom (montesquieu) and played some of my bass heavy stuff. Floorboards and other stuff soon shaking... but it was quite loud. In my case the door has a simple drop-down latch, that was vibrating. My TT stand was singing with the music (or tones and carried on when they'd stopped). Various bits and pieces on my shelves were also having a party. Going down to 18Hz has some interesting effects on the room as do seriously high levels... |
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Post by user211 on Jun 12, 2020 9:52:58 GMT
You survived the Tannoy's then Justin? I take it you did too?  |
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Post by user211 on Jun 12, 2020 9:53:58 GMT
Definitely. I went to visit Tom (montesquieu) and played some of my bass heavy stuff. Floorboards and other stuff soon shaking... but it was quite loud. In my case the door has a simple drop-down latch, that was vibrating. My TT stand was singing with the music (or tones and carried on when they'd stopped). Various bits and pieces on my shelves were also having a party. Going down to 18Hz has some interesting effects on the room as do seriously high levels... What speaker set up do you have, Clive? |
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Post by Clive on Jun 12, 2020 11:16:10 GMT
In my case the door has a simple drop-down latch, that was vibrating. My TT stand was singing with the music (or tones and carried on when they'd stopped). Various bits and pieces on my shelves were also having a party. Going down to 18Hz has some interesting effects on the room as do seriously high levels... What speaker set up do you have, Clive? In the main system system it's a combination of open baffle and baffleless. The basses are similar to the set up John has. Pairs of bass drivers facing each other about 10cm apart sans baffle, around 1kW is needed to overcome their "characteristics". For 100Hz upwards I use Bastanis Sagamatha OBs...which only need a couple of watts though I now mostly use Ncore amps - I have run them with 45, 300B, EL84, all with great success. |
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Post by user211 on Jun 12, 2020 14:30:40 GMT
Yeah I heard some Bastanis at a bake off quite a few years ago. None too bad.
Bass setup sounds interesting.
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Post by julesd68 on Jun 24, 2020 15:27:12 GMT
Here is an interesting one - the new Allo Revolution USB DAC. Certainly reasonably priced. No reviews yet I believe. www.allo.com/sparky-eu/revolution-dac.htmlFunny blurb - < The audiophile community is one big family united by the love of music. There is however, a fundamental split on how we judge audio hardware. One camp (objectivist) swears by THD+N and the opposition (subjectivists) swear by what they hear. We started Revolution as an attempt to unite both camps. >
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Post by Slinger on Jun 24, 2020 15:42:50 GMT
That's going to end in tears, isn't it?  |
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Post by wannarock2 on Jun 24, 2020 21:35:45 GMT
RE: Allo Revolution. This is a competitive space.
1. Soncoz LA-QXD1
2. Schiit Modius
3. SMSL M300 MkII
to name just a few others. I assume Audio Science Review and Hans Beekhuyzen will weigh-in with reviews. DSP filters and their audio effect may be one of the remaining areas to distinguish various DAC's. I am a little disappointed that the Allo Revolution did not incorporate XLR balanced connections in this release although I believe I read somewhere that will be a subsequent enhancement.
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Post by MartinT on Jun 24, 2020 21:58:56 GMT
Where DACs need to up their game is in direct control of a power amp without the need of a preamp or a buffer. If more effort is put into the output drive circuit, both single-ended and balanced, then it could be a real differentiator. If all your sources are digital then the DAC becomes the core of the system and the preamp can be discarded.
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Post by Clive on Jun 24, 2020 22:14:47 GMT
Where DACs need to up their game is in direct control of a power amp without the need of a preamp or a buffer. If more effort is put into the output drive circuit, both single-ended and balanced, then it could be a real differentiator. If all your sources are digital then the DAC becomes the core of the system and the preamp can be discarded. I totally agree, the structure of systems is changing. There’s less need for a preamp today and balanced power amp inputs are becoming ubiquitous with class d and even with the likes of neurochrome. Genuine balanced outs from DACs are also becoming a logical configuration. Times are a changing... |
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Post by wannarock2 on Jun 24, 2020 22:53:48 GMT
Where DACs need to up their game is in direct control of a power amp without the need of a preamp or a buffer. If more effort is put into the output drive circuit, both single-ended and balanced, then it could be a real differentiator. If all your sources are digital then the DAC becomes the core of the system and the preamp can be discarded. Yup, this and balance control are the reason I have had to purchase a new in line pre-amp. Can’t wait for this future. Too old  |
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Post by wannarock2 on Jul 21, 2020 23:26:34 GMT
The Okto dac8 Stereo DAC appears to be a strong contender from the ESS family (ESS 9028PRO) link below www.audiosciencereview.com/forum/index.php?threads/okto-dac8-stereo-dac-review.14705/Interesting, that when purchasing this unit, the company wants one to choose a custom output voltage that matches your amplifier. Available in range from 1 to 12V RMS. This would seem to be an attempt to create sufficient output drive to the power amp for allowing a more optimal connection. |
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Post by MartinT on Jul 22, 2020 9:42:31 GMT
ES9028PRO older chipset for a $1200 DAC, though. On the positive side, it has a Pi option to make an all-in-one streamer.
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Post by wannarock2 on Jul 22, 2020 14:30:09 GMT
Yeah, I noticed that. We all know it’s the implementation. They must feel very comfortable working with the 9028Pro as they previously released an 8 channel DAC based upon the 9028Pro early last year (2019) which had a very good rating. www.audiosciencereview.com/forum/index.php?threads/review-and-measurements-of-okto-dac8-8ch-dac-amp.7064/The streamer seems to me an afterthought as it is a little bit of a kluge. Self-burn SD card, take back panel off of unit to install, connect outboard USB cable etc. For the DIY, however should not be an issue. |
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Post by wannarock2 on Jul 29, 2020 19:36:04 GMT
Here is an interesting one - the new Allo Revolution USB DAC. Certainly reasonably priced. No reviews yet I believe. www.allo.com/sparky-eu/revolution-dac.htmlFunny blurb - < The audiophile community is one big family united by the love of music. There is however, a fundamental split on how we judge audio hardware. One camp (objectivist) swears by THD+N and the opposition (subjectivists) swear by what they hear. We started Revolution as an attempt to unite both camps. >
Review on the Allo Revolution DAC & USBridge The golden colored earths’ on the Rev. & Bridge are meant to connect to the earth on the Shanti LPS www.tannoyista.com/2020/06/the-allo-revolution-dac.html |
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📶NAS > Gustard x26p DAC > Benchmark LA4 Pre-Amp > NAD M22-V2 Amplifier > Revel F228Be Speakers