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Multi-Way Conventional loudspeakers with crossovers

Do I build Proac Response 2.5 Clones?
Do I build Proac Response 2.5 Clones?
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Old Today, 11:19 AM   #1
iep is offline iep  United Kingdom
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Join Date: Sep 2005
Default Do I build Proac Response 2.5 Clones?

After an explosion of interest around the Proac 2.5 Clone about 15 yeas back, things quietened down. A huge amount of really good engineering was published (thanks to Troels et al) and then the there followed and long period of tweaking and comparisons against the original. I've read most of it and the Clones basically still look very solid.

I've wanted to build a set for years but have never had the time/funds/justification. I now have about 50% of the parts needed left over from another project so wondered if I should give it a go. Orrrrr, with so much time having passed, is there newer/better option for a proven self build project?

Bit of background, I've been building speakers for years but have tended to work with older/vintage/cheaper drive units to keep cost down but also to see what is possible. I currently have a set of Kef B200 based units with passive radiator and scanspeak 2905/95000 tweeter.

These are very good with tons of that 70's style bass (loads of punch) and decent treble but the vocals are a bit recessed and I've never really got them to soundstage the way,say, a set of EPOS ES11s do.

So, in short, for the price of the woofers (I have pretty much everything else I need) and some time in the workshop, I could build the Proacs. Are they still considered worthy of a punt?

There's always the option of just buying some speakers from a shop, but I seem addicted to the home build path...... Plus, I still believe, pound for pound, buying something of similar quality to a good build project is difficult (even second hand).

Any thoughts?

Cheers.
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Old Today, 12:18 PM   #2
celef is offline celef
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I remember the hype around the 2.5 clones and i also remember all the tweaks. If you want a replika of the original r2.5 stay away from all Troel gravesen tweaks and go for the ”original” clone crossover.
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Old Today, 12:32 PM   #3
iep is offline iep  United Kingdom
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Thanks, yes, i'd spotted that. To complicate things slightly though, I'll be using my existing 2905/9500 tweeters so I'll definitely not be getting the full R2.5 experience.

That said, I really like the 2905 tweeter so I'm fairly sure it will not be the weak link in any build. Also, I have run a couple of sims on the various xover options and reckon I can reinstate the 2kHz 'bump' with the 2905 easily enough if I want something closer to the original.

I guess the real question remains whether, post hype, people are still enjoying their builds or if everyone just moved on...

Or, given I have pair of 2905 tweeters, a pile of timber and box of caps/inductors whether there is another floor standing 2 way speaker that people would recommend?

Cheers.
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Old Today, 01:13 PM   #4
Lewart is offline Lewart
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Hi. Same as you been building for awhile and build most of the clone versions that piped up over the years Needless to say I don’t have it anymore none of them were keepers. There was always something missing and the “magic”that the driver is capable of wasn’t there. Now Göran has an updated version of it . It’s for 8545-01 drivers but crossover is much simpler then most and looks like very good engineering. Unfortunately I have sold my 2905s years ago in favor of Illuminator but will get it again and try the Audioexite design.check it out and good luck.
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Old Today, 01:21 PM   #5
Lewart is offline Lewart
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Hi. Same as you been building for awhile and build most of the clone versions that piped up over the years Needless to say I don’t have it anymore none of them were keepers. There was always something missing and the “magic”that the driver is capable of wasn’t there. Now Göran has an updated version of it . It’s for 8545-01 drivers but crossover is much simpler then most and looks like very good engineering. Unfortunately I have sold my 2905s years ago in favor of Illuminator but will get it again and try the Audioexite design.check it out and good luck.
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Old Today, 01:34 PM   #6
ontariomaximus is online now ontariomaximus  Canada
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Quote:
Originally Posted by Lewart View Post
Hi. Same as you been building for awhile and build most of the clone versions that piped up over the years Needless to say I don’t have it anymore none of them were keepers. There was always something missing and the “magic”that the driver is capable of wasn’t there. Now Göran has an updated version of it . It’s for 8545-01 drivers but crossover is much simpler then most and looks like very good engineering. Unfortunately I have sold my 2905s years ago in favor of Illuminator but will get it again and try the Audioexite design.check it out and good luck.

Would that be the Classic Two -M5?
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Old Today, 01:50 PM   #7
iep is offline iep  United Kingdom
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I think you're referring to this one:

www.audioexcite.com >> Classic Two – M5

Looks very nice and the plots are quite compelling. The xover is a bit of an education as I'd immediately have assumed it to be a 2nd order roll off.

Can it really produce similar bass to the R2.5 floorstander?

Cheers,
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Old Today, 02:31 PM   #8
jtgofish is offline jtgofish
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There are much better alternatives now.The 2.5s had a recessed sounding midrange/lacked presence.Bass was also pretty ponderous.
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Old Today, 02:34 PM   #9
iep is offline iep  United Kingdom
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Thanks, can you suggest any specifically?

I'm definitely drawn to the Classic Two. Nice form factor and, conveniently, uses the tweeter that I already have....

Only concern is that I lose too much of the bass punch that my current Kef's produce (based around the Kef Calinda design).

Cheers,

Ivan
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Old Today, 03:15 PM   #10
celef is offline celef
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Join Date: Nov 2012
Quote:
Originally Posted by iep View Post
Thanks, yes, i'd spotted that. To complicate things slightly though, I'll be using my existing 2905/9500 tweeters so I'll definitely not be getting the full R2.5 experience.

That said, I really like the 2905 tweeter so I'm fairly sure it will not be the weak link in any build. Also, I have run a couple of sims on the various xover options and reckon I can reinstate the 2kHz 'bump' with the 2905 easily enough if I want something closer to the original.

I guess the real question remains whether, post hype, people are still enjoying their builds or if everyone just moved on...

Or, given I have pair of 2905 tweeters, a pile of timber and box of caps/inductors whether there is another floor standing 2 way speaker that people would recommend?

Cheers.
if you are using a larger tweeter i think you will alter the power response of the loudspeaker, you will definitely have a different sounding pair of speakers. the 2khz peak comes from the woofer cone i think. i still have a pair but not in use, the bass overpowered my room and worked best when plugged the ports
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