SB Acoustics SB26STCN-C000-4 Tweeter, 4 ohm

The response of this tweeter is amazingly smooth, flat, and extended - it is nearly flat to above 20kHz and hits 30kHz only a few dB down. It also has a relatively low Fs of 960Hz, which helps it be crossed over smoothly. I really like the off axis response - it rolls off gently and extends to about 15kHz well off axis, which helps it "disappear".

A less obvious feature of this tweeter, is the smaller diameter face plate; which lets it be mounted closer to the woofer/midrange. This gets the acoustic centers closer together, and can help the soundstage and imaging of the speaker.

This tweeter is excellent, and is a wonderful value. It is a soft dome tweeter that meets a very high level of performance.

I am using it with an equally excellent woofer from SB Acoustics, the SB16PFCR25-4 ( https://www.madisoundspeakerstore.com/approx-6-7-woofers-sb-acoustics/sb-acoustics-sb16pfcr25-4-6-paper-cone-woofer-4-ohm-round/) ; in 2 different mass loaded transmission line speakers - the MLTL-6 stand mount, and the Tower 6 floorstander.

The build manual for the MLTL-6 stand mount speaker is available here:
https://www.nbdesigns.work/shop/p/mltl-6-mass-loaded-transmission-line-speaker-build-manual

The build manual for my Tower 6 floorstanding speakers is available here:
https://www.nbdesigns.work/shop/p/tower-6-mass-loaded-transmission-line-speaker-build-manual-1

I have the XSim response graphs on my website; that show how well this tweeter works.

Old Guy Hifi on YouTube has reviewed my MLTL-6 speakers:
https://youtu.be/AEoduNaQaXk?si=GN3yglRgjJmtSzZe

ABX Audiophiles has a build/review of the MLTL-6 speakers with the available CNC cut Baltic birch flat pack:
https://youtu.be/gu-FuzyJ_1g?si=MsCIvyv4gQPTJNyT

For the price you cannot beat them. They measure very flat, super low distortion and sound fantastic! They will take lots of power too! I have them crossed over at 2200 hz 4th order. I had them playing 109 db at 3 ft and they still sounded fine. Measured distortion at 3 ft 90 db was .3% and lower. Also, very good off axis.