Eminence upgrades their legendary Alpha15a and they do it with PureAudioProject.
PureAudioProject launches two 15″ open baffle woofers that are direct upgrades of Eminence legendary Alpha15a.
OB-EA15se - 15” Ferrite Woofer for Open Baffle with 2″ Voice Coil motor and Shorting Ring
OB-EA15neo - 15” Neodymium Woofer for Open Baffle with 2.5″ Voice Coil motor and Shorting Ring
Both are designed and manufactured by Eminence for Open Baffle and exclusively for PureAudioProject
PureAudioProject Trio15TB with OB-EA15neo 15" Drivers
In most cases, both can replace the Alpha15a without the need to change the crossovers.
The new drivers are based around the performance characteristics of the Eminence Alpha15a and are designed to bring further refinement and musicality to our TRIO15 product line, as well as to any Open Baffle speakers !
Here is what Jerry McNutt, Eminence Product Design Manager says about the two drivers:
“These are the higher performance and lower distortion 15” drivers that have been specifically optimized for Open Baffle use. They have the same cone and surround as the Alpha15, but we went with stronger magnets and 2.5” VC motor to gain more motor strength, increase linearity, increase power handling, lower power compression, and to be able to add a shorting ring to lower distortion and lower the Le. To further lower distortion and cut down on basket ringing, with the ferrite model we increased the thickness of the highly ribbed and windowed basket form 18ga to a much heavier 16ga steel and with the Neo model we use our rigid cast Aluminum frame, a very open basket for minimum turbulence and Ridgid cast Al frame and push-button terminals. These new 15"s have 5.55mm and 6.03mm of Xmax to move more air down deep...”
Not only do they play low, their refinement and improved linearity allows them to extend into the mid-range with most natural sounding mid, up to 1.2KHZ and even more, allowing smooth integration with horn and hi-frequency drivers such as the BeymaTP150, Heil AMT and more; and it is for the first time and with our modular Open Baffle concept, audio enthusiasts that are not DIYers can tailor their sonic taste around their drivers of choice, simply by changing the baffles with the mid/hi frequency drivers and their crossover.
Q: How do these drivers sound ?
These drivers have similar sonic feel as the Alpha15a but they are more powerful and faster, more focused and clear, a bit dryer, deeper and punchier... and they play great mid 🙂 in simple words, they are very musical, transparent and realistic !
Q: Can these drivers replace Alpha15a in current configurations ?
Yes they can ! In our Trio15TB the same crossovers work with all three drivers, Alpha15a, OB-A15SE and OB-A15SEN...
Q: How do the two models differ with regards to amplification ?
The OB-EA15SE (Special Edition Ferrite) is a straight forward replacement to the Alpha15a and matches any amplification, incl. low power SE tube amps. The OB-EA15SEN (Special Edition Neodymium) is a perfect match with higher power amps.
Technical Specifications
SPL Alph15a vs EA15se vs EA15neo
Mechanical Drawings OB-EA15se
Mechanical Drawings OB-EA15neo
for more information contact us to info@pureaudioproject.com
PureAudioProject launches two 15″ open baffle woofers that are direct upgrades of Eminence legendary Alpha15a.
OB-EA15se - 15” Ferrite Woofer for Open Baffle with 2″ Voice Coil motor and Shorting Ring
OB-EA15neo - 15” Neodymium Woofer for Open Baffle with 2.5″ Voice Coil motor and Shorting Ring
Both are designed and manufactured by Eminence for Open Baffle and exclusively for PureAudioProject
PureAudioProject Trio15TB with OB-EA15neo 15" Drivers
In most cases, both can replace the Alpha15a without the need to change the crossovers.
The new drivers are based around the performance characteristics of the Eminence Alpha15a and are designed to bring further refinement and musicality to our TRIO15 product line, as well as to any Open Baffle speakers !
Here is what Jerry McNutt, Eminence Product Design Manager says about the two drivers:
“These are the higher performance and lower distortion 15” drivers that have been specifically optimized for Open Baffle use. They have the same cone and surround as the Alpha15, but we went with stronger magnets and 2.5” VC motor to gain more motor strength, increase linearity, increase power handling, lower power compression, and to be able to add a shorting ring to lower distortion and lower the Le. To further lower distortion and cut down on basket ringing, with the ferrite model we increased the thickness of the highly ribbed and windowed basket form 18ga to a much heavier 16ga steel and with the Neo model we use our rigid cast Aluminum frame, a very open basket for minimum turbulence and Ridgid cast Al frame and push-button terminals. These new 15"s have 5.55mm and 6.03mm of Xmax to move more air down deep...”
Not only do they play low, their refinement and improved linearity allows them to extend into the mid-range with most natural sounding mid, up to 1.2KHZ and even more, allowing smooth integration with horn and hi-frequency drivers such as the BeymaTP150, Heil AMT and more; and it is for the first time and with our modular Open Baffle concept, audio enthusiasts that are not DIYers can tailor their sonic taste around their drivers of choice, simply by changing the baffles with the mid/hi frequency drivers and their crossover.
Q: How do these drivers sound ?
These drivers have similar sonic feel as the Alpha15a but they are more powerful and faster, more focused and clear, a bit dryer, deeper and punchier... and they play great mid 🙂 in simple words, they are very musical, transparent and realistic !
Q: Can these drivers replace Alpha15a in current configurations ?
Yes they can ! In our Trio15TB the same crossovers work with all three drivers, Alpha15a, OB-A15SE and OB-A15SEN...
Q: How do the two models differ with regards to amplification ?
The OB-EA15SE (Special Edition Ferrite) is a straight forward replacement to the Alpha15a and matches any amplification, incl. low power SE tube amps. The OB-EA15SEN (Special Edition Neodymium) is a perfect match with higher power amps.
Technical Specifications
SPL Alph15a vs EA15se vs EA15neo
Mechanical Drawings OB-EA15se
Mechanical Drawings OB-EA15neo
for more information contact us to info@pureaudioproject.com
Last edited:
Zeev: great idea wish you the best of luck with Pure Audio Project, excellent loudspeakers. Best regards Moray James.
Currently I have the Hawthorne Augies with Mark Audio Alpair 12P. I am currently crossing the Augies at about 150hz.
How are the EA15neo compared to the Augies? Would I get improvements with the EA15neo? EA15neo is definitely easier to drive based on the specs. Augies are also made by Eminence.
How are the EA15neo compared to the Augies? Would I get improvements with the EA15neo? EA15neo is definitely easier to drive based on the specs. Augies are also made by Eminence.
It's on the driver's Eminence site under 'Manuals & Resources', a clickable link. 😉
edit: Hmm, Google points to the above Deltalite, but no clue how close it comes spec wise to the OB-A15SEN (NEO) custom woofers other than its measured response, Fs, VC diameter is Very close, identical.
edit: Hmm, Google points to the above Deltalite, but no clue how close it comes spec wise to the OB-A15SEN (NEO) custom woofers other than its measured response, Fs, VC diameter is Very close, identical.
Last edited: