Your search for reference series returned the following:

In-wall speaker

In Stock

• 6-1/2" Cerametallic™ woofer6titanium tweeter with pivoting Tractrix® horn
• frequency response 52-23,000 Hz
• paintable SlimTrim™ magnetic grille

In-wall speaker

Low Stock

• 6-1/2" Cerametallic™ woofer and pivoting Tractrix® horn with 1" titanium tweeter
• frequency response 52-20,000 Hz
• paintable aluminum grille

In-wall speaker

In Stock

• 8" IMG woofer and pivoting Tractrix® horn with 1" aluminum tweeter
• frequency response 46-23,000 Hz
• paintable SlimTrim® magnetic grille

In-wall speaker

In Stock

• 6-1/2" IMG woofer and pivoting Tractrix® horn with 1" aluminum tweeter
• frequency response 60-23,000 Hz
• paintable SlimTrim® magnetic grille

In-wall speaker

In Stock

1 person says 

• 1" silk dome tweeter and dual 5-1/4" woofers
• frequency response 47-20,000 Hz
• paintable

In-wall speaker

Out of Stock

• 1" silk dome tweeter and 6-1/2" polypropylene woofer
• frequency response 65-20,000 Hz
• paintable SlimTrim™ magnetic grille

Stereo digital-to-analog converter/headphone amplifier (Black)

In Stock

1 person says 

• twin Burr Brown PCM1795 192kHz/32-bit digital-to-analog converters in dual differential mode for precise, low-noise playback
• digital audio inputs — optical, coaxial, and asynchronous USB (Type B)
• built-in headphone amplifier with full-size front-panel headphone jack and volume control

Stereo digital-to-analog converter/headphone amplifier (Silver)

In Stock

1 person says 

• twin Burr Brown PCM1795 192kHz/32-bit digital-to-analog converters in dual differential mode for precise, low-noise playback
• digital audio inputs — optical, coaxial, and asynchronous USB (Type B)
• built-in headphone amplifier with full-size front-panel headphone jack and volume control

CD receiver/preamp

In Stock

19 people say 

• 31-band equalizer, auto EQ and time alignment
• four 24-bit DACs and 32-bit digital signal processor
• external amps required

2-5/8" component midrange speakers

Low Stock

1 person says 

• Aramid fiber and pulp cone
• frequency response: 80-40,000 Hz without chamber, 100-40,000 Hz with chamber
• power range: 5-15 watts RMS (60 watts peak) without chamber, 5-50 watts RMS (200 watts peak) with chamber

Bookshelf speakers

In Stock

1 person says 

• frequency response 55-30,000 Hz
• 3/4" dome tweeter and 5-1/4" woofer
• bass-reflex (ported) design

In-ceiling speaker

In Stock

1 person says 

• 6-1/2" woofer with 1" silk-dome tweeter
• frequency response 77-20,000 Hz
• paintable SlimTrim™ magnetic grille