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Thread: JR 625 S2 to 725 S2
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September 27, 2021, 06:11 PM #1
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JR 625 S2 to 725 S2
Has anyone compared the JR 625 S2 amplifier to the 725 S2 mono-amplifiers? If so, what were the differences?
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September 28, 2021, 11:25 AM #2
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Re: JR 625 S2 to 725 S2
Hello Richard,
per the specs, M725 S2 monos are marginally more powerful than M625 S2 stereo, with M725 S2 generating a maximum of 330W/8 and 640W/4, while the M625 S2 is just a little below at 325W/8 and 600W/4.
More interesting, is the damping factor, where M725 S2 is even better capable than M625 S2 to control difficult speaker loads.... Monos damping factor is 500, while M625 S2 is 200.
But much more relevant is that in M625 S2 there is a single 1500W power supply which serves both channels, while in each M725 S2 the 1500W power supply serves only a single channel... So, what you can expect with M725 S2 is greater authority, stage and image expansivity, and general ease in the audible presentation than M625 S2.
Your post is very timely.... Happens that Galen Carol in your fair city of San Antonio has a pair of M725 S2 available, which have just been upgraded from the original M725.... Yes, in case you asked, upgrading the original M725 to S2 status makes it identical to an amp that was born as M725 S2.
Saluti, GuidoElectronics: Rowland Daemon 1500W Superintegrated, Rowland Aeris DAC+PSU, M925 430W monos, Esoteric X-01 transport
Speakers: Vienna Die Muzik
Cables: Cardas Clear Beyond XL PCs, Clear Reflection XLR ICs and speaker wires, Clear digital coax
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September 28, 2021, 12:08 PM #3
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Re: JR 625 S2 to 725 S2
G.
Yes, I already talked to Galen and told him I will purchase the 725s. I have my 625 S2 listed for sale and hope to sell it soon.
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September 28, 2021, 09:58 PM #4
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Re: JR 625 S2 to 725 S2
My true dilemma is should I sell my 625 S2 for 725 S2 mono-amps or add two more REL G1 mkII subwoofers(dual stacks of two). Which options would have more impact?
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September 28, 2021, 10:18 PM #5
Re: JR 625 S2 to 725 S2
My Systems: http://www.audioshark.org/showthread...481#post158481
"We can hear everything we measure, but we can't measure everything we hear. Let your ears be your guide."
Dealer for: Aqua Hi-Fi, Aurender, AudioQuest Cables & Power Products, Berkeley Audio, Block Audio (distributor), Boulder Amplifiers, Bowers & Wilkins (B&W), Bryston, Clarisys Audio Loudspeakers (distributor), Classe’ Audio, Degritter Record Cleaning Machines, Esoteric, Finite Elemente, FirstWatt, Focal Loudspeakers and Headphones, GigaFoil, Harbeth Loudspeakers, Hegel, HiFi Man, Innuos, ISO Acoustics, Keces Power Supplies, Kharma Loudspeakers and Electronics, Kuzma Turntables, Lumin, Luxman, Magico Loudspeakers, MBL Speakers & Electronics, MSB Technologies, MySonicLabs Phono Cartridges, Nordost Cables, Ortofon, Pass Labs, Quadraspire, Rega Turntables and Electronics, Shunyata Research, STAX, Stein Music Products, Stillpoints, Soulution, VAC, Vicoustics, Viva Audio, VPI Industries, WireWorld Cables.
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September 28, 2021, 10:31 PM #6
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Re: JR 625 S2 to 725 S2
My speakers are Monitor Audio PL500 IIs. When I say more "impact", I'm not referring to bass, but overall improvement. My goal, assuming the recording allows it, is to go to the next level of spacing between instruments within the soundstage. So, do I change from my 625 S2 to 725s, add two more REL G1s, or is there another way forward?
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September 28, 2021, 10:48 PM #7
Re: JR 625 S2 to 725 S2
My Systems: http://www.audioshark.org/showthread...481#post158481
"We can hear everything we measure, but we can't measure everything we hear. Let your ears be your guide."
Dealer for: Aqua Hi-Fi, Aurender, AudioQuest Cables & Power Products, Berkeley Audio, Block Audio (distributor), Boulder Amplifiers, Bowers & Wilkins (B&W), Bryston, Clarisys Audio Loudspeakers (distributor), Classe’ Audio, Degritter Record Cleaning Machines, Esoteric, Finite Elemente, FirstWatt, Focal Loudspeakers and Headphones, GigaFoil, Harbeth Loudspeakers, Hegel, HiFi Man, Innuos, ISO Acoustics, Keces Power Supplies, Kharma Loudspeakers and Electronics, Kuzma Turntables, Lumin, Luxman, Magico Loudspeakers, MBL Speakers & Electronics, MSB Technologies, MySonicLabs Phono Cartridges, Nordost Cables, Ortofon, Pass Labs, Quadraspire, Rega Turntables and Electronics, Shunyata Research, STAX, Stein Music Products, Stillpoints, Soulution, VAC, Vicoustics, Viva Audio, VPI Industries, WireWorld Cables.
https://suncoastaudio.com/
Phone: 941-932-0282
Facebook: https://www.facebook.com/Suncoast-Au...1105178279194/
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September 29, 2021, 08:55 PM #8
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Re: JR 625 S2 to 725 S2
Isn't the list price for the Boulder 1160 $33K?
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September 29, 2021, 09:09 PM #9
Re: JR 625 S2 to 725 S2
My Systems: http://www.audioshark.org/showthread...481#post158481
"We can hear everything we measure, but we can't measure everything we hear. Let your ears be your guide."
Dealer for: Aqua Hi-Fi, Aurender, AudioQuest Cables & Power Products, Berkeley Audio, Block Audio (distributor), Boulder Amplifiers, Bowers & Wilkins (B&W), Bryston, Clarisys Audio Loudspeakers (distributor), Classe’ Audio, Degritter Record Cleaning Machines, Esoteric, Finite Elemente, FirstWatt, Focal Loudspeakers and Headphones, GigaFoil, Harbeth Loudspeakers, Hegel, HiFi Man, Innuos, ISO Acoustics, Keces Power Supplies, Kharma Loudspeakers and Electronics, Kuzma Turntables, Lumin, Luxman, Magico Loudspeakers, MBL Speakers & Electronics, MSB Technologies, MySonicLabs Phono Cartridges, Nordost Cables, Ortofon, Pass Labs, Quadraspire, Rega Turntables and Electronics, Shunyata Research, STAX, Stein Music Products, Stillpoints, Soulution, VAC, Vicoustics, Viva Audio, VPI Industries, WireWorld Cables.
https://suncoastaudio.com/
Phone: 941-932-0282
Facebook: https://www.facebook.com/Suncoast-Au...1105178279194/
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September 29, 2021, 09:14 PM #10
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Re: JR 625 S2 to 725 S2
Yes, the 735's are $39K. I'm looking at used 725 S2's, not 735's.
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October 3, 2021, 08:47 AM #11
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Re: JR 625 S2 to 725 S2
"Yes and the 735’s are $39k, right?"
Mike I'm not saying the Boulder 1160 isn't at another level compared to the JR 625 S2. I'm simply saying that they are at different price points. I'm not a fan boy of any particular manufacturer. I just try to get what works for me within my budget. I do have a couple of questions, so I'm sending you a PM.
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October 3, 2021, 09:53 AM #12
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Re: JR 625 S2 to 725 S2
I tried to send you another message, but your box is full.
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October 3, 2021, 09:55 AM #13
Re: JR 625 S2 to 725 S2
My Systems: http://www.audioshark.org/showthread...481#post158481
"We can hear everything we measure, but we can't measure everything we hear. Let your ears be your guide."
Dealer for: Aqua Hi-Fi, Aurender, AudioQuest Cables & Power Products, Berkeley Audio, Block Audio (distributor), Boulder Amplifiers, Bowers & Wilkins (B&W), Bryston, Clarisys Audio Loudspeakers (distributor), Classe’ Audio, Degritter Record Cleaning Machines, Esoteric, Finite Elemente, FirstWatt, Focal Loudspeakers and Headphones, GigaFoil, Harbeth Loudspeakers, Hegel, HiFi Man, Innuos, ISO Acoustics, Keces Power Supplies, Kharma Loudspeakers and Electronics, Kuzma Turntables, Lumin, Luxman, Magico Loudspeakers, MBL Speakers & Electronics, MSB Technologies, MySonicLabs Phono Cartridges, Nordost Cables, Ortofon, Pass Labs, Quadraspire, Rega Turntables and Electronics, Shunyata Research, STAX, Stein Music Products, Stillpoints, Soulution, VAC, Vicoustics, Viva Audio, VPI Industries, WireWorld Cables.
https://suncoastaudio.com/
Phone: 941-932-0282
Facebook: https://www.facebook.com/Suncoast-Au...1105178279194/
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October 10, 2021, 07:34 PM #14
Re: JR 625 S2 to 725 S2
Which one will be better for MApl500ii: constellation Taurus mono vs Boulder 1160
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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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Thank you for making me feel less tech challenged.:whew: FYI, The 866 works great as a straight, no nonsense integrated with DAC.
Boulder 866 app