JimmyNeutron
Super Member
Awesome review. Glad you like them. $20.00 is a steal. Enjoy your new speakers!!
Sony APM-690's in the house (pix)
- Thread starter kfa888
- Start date
dnewma04
The Healer
Round is cheaper because parts are readily available and the shape itself is structurally stronger than a flat square piece of the same material.
Price: Round < Square
Popularity (directly attributed to price): Round > Square
Performance: No real conclusion can be made other than it will cost more to make a good sounding square driver than a good sounding round driver. The shape of the pistonic style driver will not affect the sound, all else being equal.
Price: Round < Square
Popularity (directly attributed to price): Round > Square
Performance: No real conclusion can be made other than it will cost more to make a good sounding square driver than a good sounding round driver. The shape of the pistonic style driver will not affect the sound, all else being equal.
kfa888
Addicted Member
markdi
Natural born thread killer
those are nice looking sonys.
I have a compact sony stereo with apm speakers - it needs repairs.
it also has amfb - active motion feed back - some sort of motion sensor system built ito the woofer.
I also have a near mint sony cfd 5 boombox with apm speakers.
I need to find a big apm speaker like yours - very nice
I have a compact sony stereo with apm speakers - it needs repairs.
it also has amfb - active motion feed back - some sort of motion sensor system built ito the woofer.
I also have a near mint sony cfd 5 boombox with apm speakers.
I need to find a big apm speaker like yours - very nice
Susurus
Resolution:6.62×10^-34
Thanx for the pics. The orig ones from the 2005 thread expired so I couldn't see them.
The rare real-wood curved cab models had multi-magnet assemblies behind the squares:
Found that coolness on this page
This could pre-empt uneven stress & breakup distortion on the wafer.
It may be that Maggies take the concept of overall stress on the driven element in a better direction, but it would be fun to hear APM drivers in a full-blown DIY TL--since it's unlikely I'll get the largest IMF with the KEF woofer.
The rare real-wood curved cab models had multi-magnet assemblies behind the squares:
Found that coolness on this page
This could pre-empt uneven stress & breakup distortion on the wafer.
It may be that Maggies take the concept of overall stress on the driven element in a better direction, but it would be fun to hear APM drivers in a full-blown DIY TL--since it's unlikely I'll get the largest IMF with the KEF woofer.