Happy new year Nico,
Thanks for refreshing me. Very nice read. Had looked at it some years back. A refresh is always good. .
The solution is aimed at a sealed enclosure and does not feature adjustment. Imagine what would happen in the case where the recording is compensated for that some how. That would make for a very boomy listen.
Tell me more about your experiences. I haven't tried it out but will sometime.
kind regards,
Harrison.
Hi Nico,
Also in your opinion are filters hifi ? What would a RAS preamp be like
What is it that we want to hear ? Are we ready to listen to what others have crafted ? I guess when we pursue THD we are trying to preserve what others crafted.
kind regards,
Harrison.
Do you use filters on your products ?
Also in your opinion are filters hifi ? What would a RAS preamp be like The wheel has been re invented many times over the course of human existence Although I wonder what happen to the technical know how of the pyramids ?
What is it that we want to hear ? Are we ready to listen to what others have crafted ? I guess when we pursue THD we are trying to preserve what others crafted.
kind regards,
Harrison.
Hi Nico,
The other day there was a timely posting in the forum that had a preamp that is quite interesting and follows some of my philosophies
. There is no shame in acknowledging another mans work. http://www.diyaudio.com/forums/solid-state/66036-creek-cas-4040-amp-schematic-2.html . Attached is my explanation.kind regards,
Harrison.
Attachments
I use a linkwitz railey derivative EQ on the input of my pre-amp. Then I pass it though a 1 watt class A amplifier, it is followed by the master volume control then three passive eight order elliptical filters to split the frequency band to each speaker driver fed by its own amplifier with 24 step attenuator on each channel.
I further drive four additional full range speakers from a further stereo amp, but at lower level than the main speakers. Two of these are "bookshelf" type size and two are midrange/hf horns.
There is absolutely nothing that I do that would impress the audiophile at all. However, every music lover/professional that has ever visited had a problem dragging him/herself away from listening to music, whether it is oldies, trance, jazz, pop, world.... I have collected some six thousand albums over the years and can please almost every musical taste.
The fact that you show your equaliser setting boosting low bass, means that your are trying to achieve exactly what the linkwitz railey LF equaliser suggests.
Over many years of developing both amps and speakers, I came to the conclusion three years ago indicating that anything I do to try to improve on my current system is several steps backwards.
I have kept an open mind to amplifier design and performance and have built many of those suggested in these threads, but I only compare these using headphones, which is my other listening hobby.
I further drive four additional full range speakers from a further stereo amp, but at lower level than the main speakers. Two of these are "bookshelf" type size and two are midrange/hf horns.
There is absolutely nothing that I do that would impress the audiophile at all. However, every music lover/professional that has ever visited had a problem dragging him/herself away from listening to music, whether it is oldies, trance, jazz, pop, world.... I have collected some six thousand albums over the years and can please almost every musical taste.
The fact that you show your equaliser setting boosting low bass, means that your are trying to achieve exactly what the linkwitz railey LF equaliser suggests.
Over many years of developing both amps and speakers, I came to the conclusion three years ago indicating that anything I do to try to improve on my current system is several steps backwards.
I have kept an open mind to amplifier design and performance and have built many of those suggested in these threads, but I only compare these using headphones, which is my other listening hobby.
Hi Nico,
Nice response. Is it possible that there are some forms of distortion that are necessary to make sound more acceptable to our ears ? Would his explain why a set of people will seek out tube preamplifier s to 'sweeten' the signal.
In your setup, the combined delays and phase shifts may actually produce something. Are the full ranges pumping in an error correcting signal ?
Does your system have that velvet effect ? The effect that makes a visitor to your house to seek out where that music is coming from and they don't wanna leave ?
Would the same effect be achieved with less ?
How fast are your amplifiers ?
Any hints on THD ?
kind regards,
Harrison.
Nice response. Is it possible that there are some forms of distortion that are necessary to make sound more acceptable to our ears ? Would his explain why a set of people will seek out tube preamplifier s to 'sweeten' the signal.
In your setup, the combined delays and phase shifts may actually produce something. Are the full ranges pumping in an error correcting signal ?
Does your system have that velvet effect ? The effect that makes a visitor to your house to seek out where that music is coming from and they don't wanna leave ?
Would the same effect be achieved with less ?
How fast are your amplifiers ?
Any hints on THD ?
kind regards,
Harrison.
Hi Harrison,
My amps are all very fast, very low THD and quite high power, though my listening level is moderate. Speakers are set all in front of the listener in a typical stereo configuration...... a picture is simpler.
Black amp is 4 channels and the two side amps are 2-channel total of 8 amplifiers. All amplifiers are identical circuits.
My amps are all very fast, very low THD and quite high power, though my listening level is moderate. Speakers are set all in front of the listener in a typical stereo configuration...... a picture is simpler.
Black amp is 4 channels and the two side amps are 2-channel total of 8 amplifiers. All amplifiers are identical circuits.
Attachments
Over the weekend I was A/B comparing a couple of studio monitors at the local sound shop among them, Yamaha HS80M, AdamAX7, KRK Rokit 8, JBL LSR 2300. One of the sound engineers preferred the Yamaha as it sounded like a custom job someone had done for him at his studio. I did also notice how it brought out the vocals. The second sound engineer preferred the Adam and talked about quality and the price tag reflecting that quality another observer agreed with him. I said that the JBL and the KRK brought out the piano and sounded easier on the ears. We didn't reach an agreement. I also did not check how they had configured the switches behind these reference monitors.
If all the filters and bass boost were replaced with a Baxandall tone control how would it sound ?
I also wonder how would a Baxandall tone control rate against the B5 ?
kind regards,
Harrison.
If all the filters and bass boost were replaced with a Baxandall tone control how would it sound ?
I also wonder how would a Baxandall tone control rate against the B5 ?
kind regards,
Harrison.
Hi all,
What sounds better ?
1. Using an electronic crossover as part of the preamp
2. Using a passive 12dB crossover speaker side
What is the actual effect of crossovers on our ears ? Does something special happen to the way our ears perceive music when the low frequency is separated from high frequency content ?
What sounds better ?
1. Using an electronic crossover as part of the preamp
2. Using a passive 12dB crossover speaker side
What is the actual effect of crossovers on our ears ? Does something special happen to the way our ears perceive music when the low frequency is separated from high frequency content ?
hi Harisson,
I do like your intentions of creating a preamp which is universal for all different kinds of music.I do love to listen to music and I will surely enjoy it especially if it minimize my standing and going back and forth to my equiptment just to suit my taste.
I do like tone controls only two potentiometer covers all the frequency .that's why I hate equalizer.and a multiple crossover for high ,mid and lows and to feed to multiple amps surely I would enjoy listening if my electric bills were to keep as low as possible.
I only use active crossover if my set is for large crowd because crossover network of speakers are useless when amp is driven at high volume.crossover network inside my speaker is enough for my home use.
regards.
drowranger
I do like your intentions of creating a preamp which is universal for all different kinds of music.I do love to listen to music and I will surely enjoy it especially if it minimize my standing and going back and forth to my equiptment just to suit my taste.
I do like tone controls only two potentiometer covers all the frequency .that's why I hate equalizer.and a multiple crossover for high ,mid and lows and to feed to multiple amps surely I would enjoy listening if my electric bills were to keep as low as possible.
I only use active crossover if my set is for large crowd because crossover network of speakers are useless when amp is driven at high volume.crossover network inside my speaker is enough for my home use.
regards.
drowranger
Passive or active cross-over. Although filters changes signal phase, amplitude and impedance I would argue that passive at the speaker end would sound different from active filters before amplification because and amplifier output impedance at least remains more constant and relatively low than that of a passive filter at the speaker element.
I prefer the sound of an active filter multiway speaker, but it is my perception of what I think it should sound like, some would say passive sounds better - I don't believe there is better, only different and the listener makes a choice based on his illusion.
I prefer the sound of an active filter multiway speaker, but it is my perception of what I think it should sound like, some would say passive sounds better - I don't believe there is better, only different and the listener makes a choice based on his illusion.
Hi Drow,
I guess we can keep the preamp as simple as possible. Just having the tone control and gain block. If an electronic crossover is used then it should be fed from the preamp. If a passive network is used....that's speaker side.
About your experience with passive crossovers is it that the voice coils heat up and mess the crossover frequencies ? There is a link I like to forward to sound engineers, I hope you dont mind Noise-Induced Hearing Loss
kind regards
Harrison.
I guess we can keep the preamp as simple as possible. Just having the tone control and gain block. If an electronic crossover is used then it should be fed from the preamp. If a passive network is used....that's speaker side.
About your experience with passive crossovers is it that the voice coils heat up and mess the crossover frequencies ? There is a link I like to forward to sound engineers, I hope you dont mind
Noise-Induced Hearing Losskind regards
Harrison.
Harison, you will get phase shift, but I do not think that is the problem. The change in passive filter impedance will have an effect on the response of the drive element. The active filter provided same form and function in my opinion will sound better controlled than the passive type.
I find that high order elliptical filters seem to do a better job because of a very high roll-off rate almost a brick wall and phase linearity in the pass-band, you can decide on the amount of passband ripple.
Maybe others have other experiences.
When it comes to safety of the drivers, then a passive filter cries king. If it is active system and you accidentally connect the woofer amp to the tweeter, it is history. At least this cannot happen to passive systems.
I find that high order elliptical filters seem to do a better job because of a very high roll-off rate almost a brick wall and phase linearity in the pass-band, you can decide on the amount of passband ripple.
Maybe others have other experiences.
When it comes to safety of the drivers, then a passive filter cries king. If it is active system and you accidentally connect the woofer amp to the tweeter, it is history. At least this cannot happen to passive systems.
Some interesting stuff here:
[FONT=arial, verdana, helvetica]The dual driver in ear headphones have two drivers per earpiece and a 2-way crossover improving frequency drop, delivering a more separate sound and stronger bass. [/FONT]
Headphones - Buyer's Guide
- Status
- This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.