ใครจะคิดว่าตัวนี้คือ woofer แบบใหม่ แล้วไม่ใช่พัดลมครับ
ราคาขำๆอีกแล้ว 21k usd!
Eminent Technology TRW-17 Thigpen Rotary Woofer
http://www.audiojunkies.com/product/406/eminent-technology-trw17-thigpen-rotary-woofer-reviews
A new woofer technology unlike any other and a new product category for home audio. This is the first home audio woofer delivering true response to DC. The Thigpen Rotary Woofer is the worlds first true infrasonic home audio or home theater woofer. Conventional subwoofers roll off rapidly below 20Hz. With no cone the rotary woofer achieves high efficiency at very low frequencies. Most subwoofers have a difficult time producing acoustic output below 20Hz at audible levels. They generally require large amounts of equalization, distortion rises rapidly, and even the most expensive available cannot produce significant output below 10Hz. Subwoofer electronics usually contain a cutoff filter which sharply rolls off content to the subwoofer below 20Hz to protect the speaker. On the other hand, the rotary woofer has enough acoustic output to move an open door back and forth .5" between 1 and 5Hz!
Specifications:
Amplifier Requirement: 200 watts @ 8 ohms
Impedance: 8 ohms 0Hz - 40Hz
Frequency Response: 1Hz - 30Hz +/- 4dB
Suggested Crossover: 20Hz @ 18dB/octave
Sensitivity 94dB 1 watt 1 meter @10Hz
Maximum Acoustic Output: >115dB between 1 and 20Hz
Distortion: Typically 3% or less between 1 and 30Hz @90dB
Warranty - 3 years parts and labor Patent Pending
Rotary Woofer Pricing:
TRW-17 transducer $12,900.00
Motor Controller $350.00
Amplifier and crossover $700.00
Design and installation, typical $8,000-$12,000*
Total $21,950-$25,950
*Note, design and installation fees include:
1. consulting engineering for the installation,
2. design and construction of the manifold at Eminent Technology
3. installation and setup of the TRW-17 by Eminent Technology
4. measurement and performance testing of the finished installation
5. travel for Eminent Technology employees
6. contractor fees for construction necessary for the installation
