Horn No.1931 -- ES Front Horn for GRS PT6825 Planar Tweeter

Excited: Legit High End on the Cheap

Waiting for 3D print to arrive. Objective measurements all correlate to high sensitivity, no hysteresis distortion, easy load, wide dynamics, wide soundstage, subjective ease.

Transparent & Detailed, reasonably easy to build

Due to the size I had to print this horn in four parts (plus the rear cover, two parts) on my 3d printer (Bambu labs X1 Carbon). I used 0.24mm layer hight (draft mode), 5% Gyroid infill, walls 2 loops thick. After printing and glueing together (Permabond ET515) I filled ca. 1kg of epoxy casting resin ("Craft Resin") into the horn and thus created an epoxy layer on the PLA infill and inside walls. This also gave the back wall more strength to screw planar drivers and the rear cover onto the horn. I'm running the horn active on an Hypex FA123 DSP amp. Filtered out the 1kHz region a bit and at least in my room the 5kHz also needed a bit toning down. Might as well add another 1..2dB attenuation in the 1...3kHz region (BBC dip). Happy with the soundstage, tonality, detail, transparency in general, but have to hear it a bit more for building a better judgement. This driver + horn has some advantages over a good horn, but then the SB Audience 65CDN-T and ES-600 horn set a high standard.