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Thread: EP-2750 impressions
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May 5, 2019, 11:33 AM #1
EP-2750 impressions
I would be interested in hearing impressions of the Environmental Potentials EP-2750 ground filter from any who have experience with it. I am using a single dedicated 20 amp/10 gauge circuit and an AQ Niagara 5000 currently. The EP-2750 looks interesting and I believe a number of Sharks use it. Would love to know what they experienced. Thanks!
Morgan
NEW SYSTEM UNDER CONSTRUCTION
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May 5, 2019, 08:34 PM #2
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Re: EP-2750 impressions
I had one installed last year by an electrician.
In my system I did not notice any difference.
But I guess I feel better having it in the system.
I would think that your Niagara would be more than satisfactory.My System
Acoustic Revive RTP-4
Innuos Pulsar
Lampizator BALTIC4
Cary SLP-05
Pass XA30.5 or
Line Magnetic 845ia
Reference 3A Reflector's
Pr SVS SB3000 Subs
Cables & Tubes "subject to change without notification".
Complete system on battery power/solar
Core Audio Design Rack
DIY bass traps and custom curved diffusors.
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May 5, 2019, 09:59 PM #3
Re: EP-2750 impressions
I have an EP-2050 on the main house panel and an EP-2750 on my dedicated circuit. When I put them in and also put in dual ground rods, the difference in noise floor was substantial as I recall (a few years ago...)
Legacy Audio Valor+Wavelet v2, Esoteric S-02 Amps HDPlex 300W, RevAudio Labs DC Umbilical, Esoteric Grandioso P1, P1PSU & dual D1 DACs, Cybershaft Prem Ltd OP21A 10 MHz Clock, Esoteric C-02X, Shunyata Everest 8000 & Altaira SG-NR hubs, Sigma SGC/CGC ground cables, VTX-Ag ground tails, AfterBurner8 duplexes, CSP Inc Q4B, S2B IEC plates, Shunyata Omega CLOCK-50 cables, Tubulus Concentus HDMI, Elrod Master Series Diamond SE & Masters Series Gold Power cords and Statement Gold XLRs, Diamond XLRs & Master Series Diamond XLRs, Shunyata OMEGA QR-s power cable, Anaconda Z-tron XLR, Elrod Statement Gold speaker cables, Adona Zero GX3, GX2, GX racks, Composite Audio CF-2010, Townshend Audio Podiums, HRS DPX Damping Plates, Stillpoints Ultra SS w/Ultra Bases, pArtScience 64-well, 2D QRD 3-inch SpaceArray Diffusors
Travel/Rip: Apple MacBook Pro 16” 2023 M2 Max, 12-core CPU, 38-core GPU, 32 GB RAM, 1 TB SSD for Audirvana+ v3, iTunes, REW Audio Analyzer, dbPowerAmp, DVD Audio Extractor
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May 6, 2019, 08:06 AM #4
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- May 2017
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- Cleveland, Ohio, USA
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Re: EP-2750 impressions
It's the exact opposite of what you want!
You need a low impedance path at all frequencies.
A series filter is a high impedance path at the filtered frequencies.
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May 6, 2019, 09:06 AM #5
Re: EP-2750 impressions
Having owned both the EP-2050 and EP-2750 from EP for 5 years, I've experienced nothing but improvements in noise floor, etc..with these
used on a properly grounded home (double ground rods, CADWELD bonding, solid core ground leads, large gauge wire, low impedance/very
low resistance path to ground).
Where did you find anything that allows you to conclude that the EP-2750 is a high impedance device?Legacy Audio Valor+Wavelet v2, Esoteric S-02 Amps HDPlex 300W, RevAudio Labs DC Umbilical, Esoteric Grandioso P1, P1PSU & dual D1 DACs, Cybershaft Prem Ltd OP21A 10 MHz Clock, Esoteric C-02X, Shunyata Everest 8000 & Altaira SG-NR hubs, Sigma SGC/CGC ground cables, VTX-Ag ground tails, AfterBurner8 duplexes, CSP Inc Q4B, S2B IEC plates, Shunyata Omega CLOCK-50 cables, Tubulus Concentus HDMI, Elrod Master Series Diamond SE & Masters Series Gold Power cords and Statement Gold XLRs, Diamond XLRs & Master Series Diamond XLRs, Shunyata OMEGA QR-s power cable, Anaconda Z-tron XLR, Elrod Statement Gold speaker cables, Adona Zero GX3, GX2, GX racks, Composite Audio CF-2010, Townshend Audio Podiums, HRS DPX Damping Plates, Stillpoints Ultra SS w/Ultra Bases, pArtScience 64-well, 2D QRD 3-inch SpaceArray Diffusors
Travel/Rip: Apple MacBook Pro 16” 2023 M2 Max, 12-core CPU, 38-core GPU, 32 GB RAM, 1 TB SSD for Audirvana+ v3, iTunes, REW Audio Analyzer, dbPowerAmp, DVD Audio Extractor
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May 6, 2019, 09:27 AM #6
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May 6, 2019, 01:59 PM #7
Re: EP-2750 impressions
Legacy Audio Valor+Wavelet v2, Esoteric S-02 Amps HDPlex 300W, RevAudio Labs DC Umbilical, Esoteric Grandioso P1, P1PSU & dual D1 DACs, Cybershaft Prem Ltd OP21A 10 MHz Clock, Esoteric C-02X, Shunyata Everest 8000 & Altaira SG-NR hubs, Sigma SGC/CGC ground cables, VTX-Ag ground tails, AfterBurner8 duplexes, CSP Inc Q4B, S2B IEC plates, Shunyata Omega CLOCK-50 cables, Tubulus Concentus HDMI, Elrod Master Series Diamond SE & Masters Series Gold Power cords and Statement Gold XLRs, Diamond XLRs & Master Series Diamond XLRs, Shunyata OMEGA QR-s power cable, Anaconda Z-tron XLR, Elrod Statement Gold speaker cables, Adona Zero GX3, GX2, GX racks, Composite Audio CF-2010, Townshend Audio Podiums, HRS DPX Damping Plates, Stillpoints Ultra SS w/Ultra Bases, pArtScience 64-well, 2D QRD 3-inch SpaceArray Diffusors
Travel/Rip: Apple MacBook Pro 16” 2023 M2 Max, 12-core CPU, 38-core GPU, 32 GB RAM, 1 TB SSD for Audirvana+ v3, iTunes, REW Audio Analyzer, dbPowerAmp, DVD Audio Extractor
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May 6, 2019, 06:55 PM #8
Re: EP-2750 impressions
I had a great conversation with Naveen, one of their lead engineers this afternoon. He provided the following explanation after our call.
Please note that the EP-2750s and 2775s (for much bigger applications than a single audio circuit) are ZERO IMPEDANCE devices at 60Hz for the US which is AFAIK what we want.
"EP ground filter comes in two sizes 2775 and 2750. It can be installed at the service entrance and also at the sub-panels to eliminate the high-frequency noise through the ground. It is always connected in series. The ground filter is a tuned low pass filter that attenuates high-frequency noise on the ground wire. The EP2750/2775 is a ground filter with zero impedance for fundamental frequency 60Hz. Its impedance raises and it acts like a speed bump for the transients at high-frequency range.
Typical applications of ground filter include protection from lightning EMI entering the facility and removing ground loop currents. It can be installed at the service entrance to protect the facility from lightning EMI entering the facility. It can also be installed at the load center to remove high-frequency noise generated on the ground wire of the load."
He also sent a product data cut-sheet, etc...if anyone has any questions I'd suggest communicating directly with the manufacturer to get their opinion on this first hand.Legacy Audio Valor+Wavelet v2, Esoteric S-02 Amps HDPlex 300W, RevAudio Labs DC Umbilical, Esoteric Grandioso P1, P1PSU & dual D1 DACs, Cybershaft Prem Ltd OP21A 10 MHz Clock, Esoteric C-02X, Shunyata Everest 8000 & Altaira SG-NR hubs, Sigma SGC/CGC ground cables, VTX-Ag ground tails, AfterBurner8 duplexes, CSP Inc Q4B, S2B IEC plates, Shunyata Omega CLOCK-50 cables, Tubulus Concentus HDMI, Elrod Master Series Diamond SE & Masters Series Gold Power cords and Statement Gold XLRs, Diamond XLRs & Master Series Diamond XLRs, Shunyata OMEGA QR-s power cable, Anaconda Z-tron XLR, Elrod Statement Gold speaker cables, Adona Zero GX3, GX2, GX racks, Composite Audio CF-2010, Townshend Audio Podiums, HRS DPX Damping Plates, Stillpoints Ultra SS w/Ultra Bases, pArtScience 64-well, 2D QRD 3-inch SpaceArray Diffusors
Travel/Rip: Apple MacBook Pro 16” 2023 M2 Max, 12-core CPU, 38-core GPU, 32 GB RAM, 1 TB SSD for Audirvana+ v3, iTunes, REW Audio Analyzer, dbPowerAmp, DVD Audio Extractor
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May 7, 2019, 08:03 PM #9
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Re: EP-2750 impressions
Nope, you want as low an impedance at all frequencies as possible!
I was just reading a small part of the 500 page Motorola paper on cell-phone tower and building AC power & grounding. They wrote about how the wire from the service entrance point to the ground rod system should be a straight as practicable. With only mild curves, because bends act as an inductor and increase impedance at higher frequencies. The problems are not at 50/60Hz, but at higher noise & interference frequencies.
The Safety Ground system and the ground rod system are there for safety. Devices like these decrease the safety of the systems a lot!
Ask them if each unit has a 'UL' sticker?
While they may say that it passed this test or that test, the thing that matters is that there is a sticker on the unit that you purchase.Last edited by Speedskater; May 7, 2019 at 08:08 PM. Reason: added content
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May 7, 2019, 08:06 PM #10
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Re: EP-2750 impressions
double post
Last edited by Speedskater; May 7, 2019 at 08:07 PM. Reason: double post
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June 7, 2019, 10:46 AM #11
Re: EP-2750 impressions
Legacy Audio Valor+Wavelet v2, Esoteric S-02 Amps HDPlex 300W, RevAudio Labs DC Umbilical, Esoteric Grandioso P1, P1PSU & dual D1 DACs, Cybershaft Prem Ltd OP21A 10 MHz Clock, Esoteric C-02X, Shunyata Everest 8000 & Altaira SG-NR hubs, Sigma SGC/CGC ground cables, VTX-Ag ground tails, AfterBurner8 duplexes, CSP Inc Q4B, S2B IEC plates, Shunyata Omega CLOCK-50 cables, Tubulus Concentus HDMI, Elrod Master Series Diamond SE & Masters Series Gold Power cords and Statement Gold XLRs, Diamond XLRs & Master Series Diamond XLRs, Shunyata OMEGA QR-s power cable, Anaconda Z-tron XLR, Elrod Statement Gold speaker cables, Adona Zero GX3, GX2, GX racks, Composite Audio CF-2010, Townshend Audio Podiums, HRS DPX Damping Plates, Stillpoints Ultra SS w/Ultra Bases, pArtScience 64-well, 2D QRD 3-inch SpaceArray Diffusors
Travel/Rip: Apple MacBook Pro 16” 2023 M2 Max, 12-core CPU, 38-core GPU, 32 GB RAM, 1 TB SSD for Audirvana+ v3, iTunes, REW Audio Analyzer, dbPowerAmp, DVD Audio Extractor
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AudioShark forum is a leading forum site for High End Audio Discussion, Stereo System Discussion, Home Theater System Discussion, Best Home Stereo System Discussion, Home Theater Installation Discussion etc.
The AudioShark forum was created for sharing the passion of high-end Audio. We have Audiophiles from all over the world participating and sharing their knowledge. From novice to experts, you will find a friendly environment for discussing about High End Audio, Stereo System, Home Theater System, Home Stereo System, Home Theater Installation, Amplifiers, Speakers, Subwoofers, Integrated System, Acoustic treatments & Digital Room Corrections and many more.
At AudioShark, we also have incorporated an exciting Marketplace where members can peruse terrific buys on used gear, as well as meet dealers and discuss the purchase of new gear.
We are as crazy about this hobby as you are! So come on in and join us! Audioshark.org the Friendliest Audio Forum!
Industry Participation Disclosure : The owner and administrator of Audioshark is the owner of Suncoast Audio LLC in Sarasota Florida. Suncoast Audio has a full brick and mortar presence in Sarasota with several great show rooms with many world class brands. More information can be found at http://www.suncoastaudio.com
Audioshark is a community of like minded individuals. Audioshark welcomes participation from all manufacturers and owners of all brands and products. It is our belief that online forums provide a community of like minded audiophiles and music lovers to encourage the growth of this wonderful hobby.
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