Past field trips have included:

• Quantum Sound/Intersonics, makers of full range speakers and subwoofers
• Bag End, makers of subwoofer systems and full range speakers
• Richardson Electronics, the only vacuum tube manufacturer remaining in the US
• TLG Acoustical Design, who make a very large stereo horn speaker system, and who also build the enclosures for the Platinum Air Pulse speakers
• ELP laser turntable demonstration at the Marriott O'Hare

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