I have a Pioneer SA-9500 mkII whose speaker terminals are rectangular blocks, 74mm by 18mm, each holding 4 terminals. Photos below show the Pioneer.
I also have a Sanyo JCX-2600K whose speaker terminals are ALSO rectangular blocks, 74mm by 18mm. Is this a standard form factor? Are speaker terminals with this form factor still available?
It would be nice to upgrade the ones on the Pioneer since they are steel, and steel contributes some distortion.
It would probably work to buy some Pomona dual binding posts, cut a rectangular piece of hardboard, drill it, clamp the posts to it, and affix it over (EDIT or behind?) the rear panel using the same screw holes that held the original terminal blocks. But it would be nice to avoid all that by staying with the original form factor so it looks OEM.
I also have a Sanyo JCX-2600K whose speaker terminals are ALSO rectangular blocks, 74mm by 18mm. Is this a standard form factor? Are speaker terminals with this form factor still available?
It would be nice to upgrade the ones on the Pioneer since they are steel, and steel contributes some distortion.
It would probably work to buy some Pomona dual binding posts, cut a rectangular piece of hardboard, drill it, clamp the posts to it, and affix it over (EDIT or behind?) the rear panel using the same screw holes that held the original terminal blocks. But it would be nice to avoid all that by staying with the original form factor so it looks OEM.
Attachments
Douglas Self has measured this and written about it: https://www.diyaudio.com/community/threads/speaker-terminals-made-from-brass.329485/
Also see https://www.audiosciencereview.com/...magnetic-materials-in-audio-connectors.41867/ which says nickel is also ferromagnetic, so nickel plating may be problematic.
If you're designing for near-ppm distortion levels, it's probably worth at least trying to select output terminals that don't contribute ~100ppm by themselves. (This Pioneer SA-9500 mkII isn't the factory design anymore, I respun its driver boards with a new design that target <10ppm.)
Also see https://www.audiosciencereview.com/...magnetic-materials-in-audio-connectors.41867/ which says nickel is also ferromagnetic, so nickel plating may be problematic.
If you're designing for near-ppm distortion levels, it's probably worth at least trying to select output terminals that don't contribute ~100ppm by themselves. (This Pioneer SA-9500 mkII isn't the factory design anymore, I respun its driver boards with a new design that target <10ppm.)
These are direct replacements for the original plastic clamps: https://speaker-terminal.com/en/produkt/pioneer-sa-9500-ii-speaker-terminal/
They're likely to be brass, but you would have to contact the supplier to make sure.
They're likely to be brass, but you would have to contact the supplier to make sure.
