Membrana compatible con foster: n-30, n30, n 30, n08, 025h30, h025n30, h025n27, 025n27, h025n28, ft-300h, ft 300h, ft-500h, ft 500h, ft500h, ht 404, ht-405, ht 405, ht-406, ht 406, ht-407, ht 407, ht-408, ht 408, ht-410, ht 410, ht 411, ht-412, ht 413, pht-404, pht 404, pht-405, pht 405, pht-406, pht 406, pht-408, pht 408, pht-408, pht 408, pht-410, pht 410. 8 ohms. fenolico (también disponible en Titanio) .