VM Innovations discounts a selection of Sennheiser headphones via coupons, as listed below. With free shipping, each is at the lowest total price we could find by at least $5 and as much as $50. The deals:

• Sennheiser HD428 Closed Circumaural Hi-Fi Headphones (pictured) for $29.99 via "HFS4N"
• Sennheiser HD 439 Around-The-Ear Portable Headphones for $59.99 via "SH5V"
• Sennheiser HD 518 Audiophile DJ Headphones for $79.99 via "APH5V"
• Sennheiser Amperior DJ Pro Monitoring Headphones for $154.99 via "HDA25"
• Sennheiser HD 25 Amperior DJ Pro Monitoring Headphones for $154.99 via "HD25B"