Play music with a good strong bass line and crawl on the floor on your hands and knees until you find a spot where the bass sounds the best, with a smooth, tight response. Your ears need to be at the same height that the subwoofer’s driver will be when it is sitting on the floor. If you have access to a real-time analyzer (RTA), play pink noise over the system and use the RTA to find a location that exhibits the flatest bass response. Once you’ve found the place where the bass sounds the best, put the subwoofer there and it should sound just as good from your listening position.

Polarity

The setting of the polarity switch can affect how the low frequencies sound in relation to the main speakers. Listen to bass-heavy music with the polarity switch in and out. In one position the low frequencies should sound full, while in the other position they may sound hollow and thin. Choose the position that yields the fullest low-frequency sound.

Feel free to experiment

In many respects, every room is unique in terms of its acoustics. Even after you’ve placed your subwoofer where you think it’ll sound best, try moving it around. You might be pleasantly surprised.

Additional Tidbits of Wisdom

•Avoid using EQ to compensate for dips in the frequency response caused by room modes. It is better to place the subwoofer in a position where dips are minimized and use the EQ to smooth out any peaks.

•Provide at least six inches clearance around the heatsink to allow air to get at it.

•Provide at least three feet clearance from a TV, computer monitor, or any form of magnetic media (video and audio recording tapes, computer disks, etc.), to prevent the HR150’s powerful magnet from distorting the video screen or erasing the magnetic media.

•When you shut down your equipment, turn off the HRS150 powered subwoofer first (and any other powered speakers in the system) to prevent thumps and other noises generated by any upstream equip- ment from coming out the speakers. When powering up, turn on the powered speakers and subwoofer last.

•Save the shipping box! You may need it someday, and you don’t want to have to pay for another one.

•Save your sales receipt in a safe place.

•Also record the HRS150 serial number in the space provided on the inside front cover, along with where and when you bought it.

A Few Words About THX™ pm3™ Certification

Nearly two decades ago, George Lucas turned a passion for great sound into the world’s most accepted and trusted solution for achieving it. The standard was named THX (for Tomlinson Holman, who developed the THX Sound System when he was the research and technical director at Lucasfilm Ltd.™ in the early 80s), and today, with hundreds of thousands of home theater customers and more than 3000 THX Certified movie theaters enjoying its benefits, the THX name has become nothing short of legendary. Simply put: when it comes to premium sound, no other name so closely defines ‘quality’ for millions of movie-goers and home theater enthusiasts alike.

Today, a new landscape is emerging. A landscape comprised of hundreds of small, professional multi-channel facilities, whose need for differentiation, expert technical and marketing support, and a true, multi-channel standard is becoming a competitive fact of life. Again, THX has a singular solution and this time it’s called THX pm3 Certification.

All facilities involved with mixing and/or monitoring of multi-channel material should have the option to use pm3. THX pm3 Certification is ideal for DVD mastering, sweetening, and mixing; and is also perfect for facilities doing work in broad- cast, music, or multi-media applications.

HRS150 THX pm3 Certification

Anyone seeking THX Certification for their studio, or striving to maintain THX standards, can use the HRS150s and rest assured that their facility is in full compliance.

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