What makes a difference to sound quality and why?
I would like to know peoples opinions and am particularly intrested in links detailing the causes. The aim of a hifi I believe is to be transparent to the source, l do not use a graphic equalizer or dsp modes. So it is from that view point, improving sound quality = more transparent to source, that I am most intrested in.
My opinions of things are detailed below, as you can see I have been hanging out on other forums where everything sounds the same is popular. I may be wrong on some or all counts and am willing to change my mind given a convincing reason. Please provide a link or reference as well as opinion "l can hear the difference", if possible. I am sadly more convinced by measurements and test results than personal accounts.
Hifi racks I can find no reason for effecting sound quality, as long as they are stable. Isolation pads, I can not see making any difference to sound quality.
Power conditioners I believe are designed to remove noise from the mains if present, surge protectors to protect against power spikes. I can see them having an effect if you suffer from poor mains supply. Ground loop problems if equipment is linked to different wall sockets then linked together by analogue connections or if the loop is poorly grounded or something is on the same loop and generating noise, I can see having an effect.
Power cables and audiophile quality fuses I can find no reason for effecting sound quality, as long as they are not faulty.
There are claims that all cd players that meet the cd redbook standards sound the same. When level matched and time matched listeners can not apparantly tell them apart. The biggest difference in cd sound is apparantly that analogue output voltage which can vary alot, a higher voltage equals a louder sound, which if only slightly louder will not be heard as volume but clarity. Old cd players can loose their bottom end, bass response due to components wearing out. Things like jitter,etc.. are often quoted by those who claim a difference but the levels of distortion are massively below that which is audible. CD players can apparantly sound different when playing non-pristine cds or cdrs, or if the cd transport mechanism has dust in it, etc... I would like a link to a site detailing cd player sound what are the difference and why, like the one I give below for amplifiers if anyone knows of one.
Analogue interconnectors can make a difference apparantly if they suffer from impedence variation, due to poor connection, poor construction or damage. This causing reflections, return loss, that can effect sound quality. Poor shielding can also make the cable vunrable to interference.
Digital interconnectors I can find no reason for effecting sound quality if they are working.
Ross Elliott of Elloitt sound productions has an article Amplifier sounds what are the differences detailing some of the causes of amplifiers sounding different, particularly in how they handle clipping. Some like Richard Clark amplifier challange claim good quality amplifers all sound the same when not clipping, the exception being valve amplifers.
Speaker cable according to AES audio engineering society papers, does have an effect, causing mild frequency selective attenuation and finite impedance in the cable may cause harmonic voltages to appear across the loud speaker causing distortion. But double blind testing of speaker cables with the same gauge does not show results better than chance.
Speaker stands as long as they hold the speaker still and at the right height I can not see different stands having different effects on sound quality. Speaker isolation pads between the stand and speaker I can see the theory that they stop floor vibrations travelling up the stand into the speaker. So perhaps they have an effect, if it is audible I do not know. I can also see the logic behind placing a subwoofer on a paving slab to give it a solid rather than vibrating platform. A down firing subwoofer might also benefit due to concrete being more reflective of bass frequencies than carpet/underlay/floorboards.
Speaker design and placement have a massive impact on sound quality, that at least everyone agrees with.
Room Acoustics have a massive impact on sound quality, again everyone seems to agree.
My current setup is far from audiophile - highend, and is mostly well over 10 years old.
Manhattan XT-F satellite receiver with 1mtr motorized dish, connected via analogue cables to Sony RDR-HX525 Hard Drive & DVD Recorder connected via coaxial digital out to Sony STR-DB930 Home Cinema Receiver connected via Cable Talk 3.1 Speaker Cable to 2 pairs for front and rear Mission 731i Bookshelf/Stand Speakers, the version with silk dome tweeters, they are ontop of cd racks doubling as speaker stands, I do not use a center speaker (a JBL MR Center Speaker is gathering dust in cupboard). The receiver is also connected via 2 analogue cables to a Rega Vulcan Active subwoofer which is ontop of a paving slab and has another paving slab ontop of it. Image is provided by a dlp darkchip3 video projector on a 96 inch x 54 inch screen, the projector is connected to the Sony RDR-HX525 via component video cables. Speaker placement, listener seating position are prety much ideal to acoustic theory. First order reflections from the front stero pair have sound absorbers on walls and floor, a sound diffuser is behind the listening position. I do not currently use bass traps.
I would like to know peoples opinions and am particularly intrested in links detailing the causes. The aim of a hifi I believe is to be transparent to the source, l do not use a graphic equalizer or dsp modes. So it is from that view point, improving sound quality = more transparent to source, that I am most intrested in.
My opinions of things are detailed below, as you can see I have been hanging out on other forums where everything sounds the same is popular. I may be wrong on some or all counts and am willing to change my mind given a convincing reason. Please provide a link or reference as well as opinion "l can hear the difference", if possible. I am sadly more convinced by measurements and test results than personal accounts.
Hifi racks I can find no reason for effecting sound quality, as long as they are stable. Isolation pads, I can not see making any difference to sound quality.
Power conditioners I believe are designed to remove noise from the mains if present, surge protectors to protect against power spikes. I can see them having an effect if you suffer from poor mains supply. Ground loop problems if equipment is linked to different wall sockets then linked together by analogue connections or if the loop is poorly grounded or something is on the same loop and generating noise, I can see having an effect.
Power cables and audiophile quality fuses I can find no reason for effecting sound quality, as long as they are not faulty.
There are claims that all cd players that meet the cd redbook standards sound the same. When level matched and time matched listeners can not apparantly tell them apart. The biggest difference in cd sound is apparantly that analogue output voltage which can vary alot, a higher voltage equals a louder sound, which if only slightly louder will not be heard as volume but clarity. Old cd players can loose their bottom end, bass response due to components wearing out. Things like jitter,etc.. are often quoted by those who claim a difference but the levels of distortion are massively below that which is audible. CD players can apparantly sound different when playing non-pristine cds or cdrs, or if the cd transport mechanism has dust in it, etc... I would like a link to a site detailing cd player sound what are the difference and why, like the one I give below for amplifiers if anyone knows of one.
Analogue interconnectors can make a difference apparantly if they suffer from impedence variation, due to poor connection, poor construction or damage. This causing reflections, return loss, that can effect sound quality. Poor shielding can also make the cable vunrable to interference.
Digital interconnectors I can find no reason for effecting sound quality if they are working.
Ross Elliott of Elloitt sound productions has an article Amplifier sounds what are the differences detailing some of the causes of amplifiers sounding different, particularly in how they handle clipping. Some like Richard Clark amplifier challange claim good quality amplifers all sound the same when not clipping, the exception being valve amplifers.
Speaker cable according to AES audio engineering society papers, does have an effect, causing mild frequency selective attenuation and finite impedance in the cable may cause harmonic voltages to appear across the loud speaker causing distortion. But double blind testing of speaker cables with the same gauge does not show results better than chance.
Speaker stands as long as they hold the speaker still and at the right height I can not see different stands having different effects on sound quality. Speaker isolation pads between the stand and speaker I can see the theory that they stop floor vibrations travelling up the stand into the speaker. So perhaps they have an effect, if it is audible I do not know. I can also see the logic behind placing a subwoofer on a paving slab to give it a solid rather than vibrating platform. A down firing subwoofer might also benefit due to concrete being more reflective of bass frequencies than carpet/underlay/floorboards.
Speaker design and placement have a massive impact on sound quality, that at least everyone agrees with.
Room Acoustics have a massive impact on sound quality, again everyone seems to agree.
My current setup is far from audiophile - highend, and is mostly well over 10 years old.
Manhattan XT-F satellite receiver with 1mtr motorized dish, connected via analogue cables to Sony RDR-HX525 Hard Drive & DVD Recorder connected via coaxial digital out to Sony STR-DB930 Home Cinema Receiver connected via Cable Talk 3.1 Speaker Cable to 2 pairs for front and rear Mission 731i Bookshelf/Stand Speakers, the version with silk dome tweeters, they are ontop of cd racks doubling as speaker stands, I do not use a center speaker (a JBL MR Center Speaker is gathering dust in cupboard). The receiver is also connected via 2 analogue cables to a Rega Vulcan Active subwoofer which is ontop of a paving slab and has another paving slab ontop of it. Image is provided by a dlp darkchip3 video projector on a 96 inch x 54 inch screen, the projector is connected to the Sony RDR-HX525 via component video cables. Speaker placement, listener seating position are prety much ideal to acoustic theory. First order reflections from the front stero pair have sound absorbers on walls and floor, a sound diffuser is behind the listening position. I do not currently use bass traps.