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EP-4.7 Loudspeaker

Shown in Black Tri-coat

  • Description
  • Features
  • Specifications
  • Reviews

In the Stereotimes review Dave Thomas summed up with:
My time with the Emerald Physics EP4.7 loudspeakers has been extremely enjoyable.

It’s actually quite a remarkable achievement to build a speaker that combines so many wonderful attributes, combining innovative technologies, attractive styling, and wonderful sonics all in a product that is a flat-out bargain compared to a lot of what I just saw a few months ago at CES. And the real kicker… no box! Bravo to the folks at Emerald Physics! It’s still early in the year and I’ve already encountered an obvious choice as a 2015 Most Wanted Component. It’s gonna be a great year. Highly recommended.


The new EP4.7 is the baby brother to our top of the line EP2.7. It is the EP2.7 with one instead of two 15" open baffle woofers. Efficiency is 2 lower at 95Db versus the 97 of its larger brother. In addition bass is flat to 28Hz versus the 20Hz of the 2.7.  With its new Emerald Physics designed 12" point source professional driver system, the EP4.7 is a true 3-way, bi-amplified, dipole, controlled directivity speaker

Cutting edge sonic performance establishes a new level of realism & dimensionality.

This new EP4.7 model does not share a single part from the original CS2 series products. It has new outboard Special Edition crossovers, upgraded Emerald Physics DSP, custom Emerald Physics drivers, upgraded baffle, glod plated copper connectors and the  much improved cosmetics of the EP2.7 in s smaller more room friendly size. Our new tweeter uses a Polyester diaphragm and offers much improved speed, detail and overall weight. 

The innovation continues in the Bass range with our unique Aperture Bass Propagation Technology. This proprietary system is used for the custom Emerald 15" dipole woofer. This design increases low frequency power and linearity, while improving on the speed and articulation of the original CS2.7. The new Emerald designed 15" woofer moves 80% more air than the original CS2.3 and CS2.7 woofers so a single 15 gets us almost as much bass as the dual 15's of the older models.  

DSP equalization and active crossover functions are provided by the included Emerald Physics DSP2.4 Digital Processor and the included $US600.00 upgraded passive Special Edition crossover uses custom Emerald Physics caps as well as many other upgraded parts & internal silver coated OCC wire

Includes DSP2.4 digital electronic crossover & $US600.00 Special Edition passive crossover

EP4.7 Specifications * :

System Type: 3-way, Bi-amplified Dynamic Dipole - DSP equalized
Frequency Range: 28Hz–22kHz -1dB/+.5dB from target curve
Frequency Linearity: +/- 1dB from 100Hz-20kHz from target curve
Impedance: 8 Ohms nominal bass / 8 ohms midrange/tweeter
Max Power input: 150W RMS, 300W program
Sensitivity: 95dB 2.83V @ 1M @ 1kHz
Drivers: High Frequency:  Custom Emerald 1 inch exit Polyester compression driver
                Mid Frequency: 12 inch Emerald Physics 12.1 midrange design w/edge wound ribbon VC
               Low Frequency: Custom Emerald Physics 15 inch paper cone
Crossover: Special Edition Mid/high –Passive outboard 3rd order acoustic filter @ 900Hz.
                    Low/Mid –External DSP Asymmetrical active network @ 250Hz.
Frequency contour: Digital equalization – Emerald Physics DSP2.4
Standard Finish: Automotive 8 stage Tri-coat finishes in 5 colors
Optional Finishes: Ancient Cocobolo and Santos Rosewood faux wood Tri-coat
Dimensions: 38.75”H x 22”W x 3”D (Baffle) (15” with rear base)

Weight: Net: 65 lbs each, Shipping: 80 lbs each

*Specifications subject to change