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Conwy, Wales
The following are some web sites with audio teaching that I have found helpful. Reading is essential in learning, but I think audio recordings have a place in gaining knowledge as well. I am not a devotee of any of these speakers, but I think they have truth to share.
http://www.ankerberg.com/
Contemporary Christian apologetics with a large site from Dr. John Ankerberg
http://www.garyhabermas.com/
Dr. Habermas is a philosopher and an expert on the resurrection of Jesus Christ.
http://www.waltermartin.org/realaudio.html
A little dated since Dr. Walter Martin passed on in 1989, but a good site for dealing with pseudo-Christian cults and the occult
http://www.albertmohler.com/radio_list.php
Dr. Mohler is a theologian and the president of The Southern Baptist Theological Seminary
http://www.monergism.com/thethreshold/articles/bio/johnpiper.html
Dr. Piper has an insightful and balanced approach to the Bible and theology.
http://www.oneplace.com/ministries/Let_My_People_Think/
Dr. Ravi Zacharias provides philosophical insight with much passion.