web123 https://blog.hatena.ne.jp/web123/ blog123 https://blog123.hatenablog.jp/ Speaker My best loud speaker so far, Telefunken 18x26 oval unit, circa mid 1950, in open back cabinet. Baffle size is 45cm x 25cm. My initial trial was using Graetz 21x32 unit (Isophon P2132 equiv.) as full range, and I found, though it claims response up to 8kHz, I need to cut higher than 2.5kHz. Firstly, … 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog123.hatenablog.jp%2Fentry%2F2019%2F01%2F08%2F165816" title="Graetz Siemens Telefunken - blog123" class="embed-card embed-blogcard" scrolling="no" frameborder="0" style="display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;"></iframe> https://cdn-ak.f.st-hatena.com/images/fotolife/w/web123/20190108/20190108162546.jpg Hatena Blog https://hatena.blog 2019-01-08 16:58:16 rich https://blog123.hatenablog.jp/entry/2019/01/08/165816 1.0 100%