How Much Power Do Vandersteen 5a's Really Need?


I just made a deal for a mint condition pair of these. I've long wanted a really good pair of Vandersteens but didn't have the budget to play in that space. I've read a number of discussions here, and otherwise, talking about this, though they were somewhat older. Despite the fact that the low end in these speakers is internally amplified, and one would think even SET amps, or certainly just about any good push pull tube amp would power these superbly, people generally seem to be throwing a LOT of power at them. Am I missing something?

Any input, expertise, or thoughts would be appreciated. Thanks.
nightfall

Showing 12 responses by nightfall

Does anyone know where the Vandersteen CD used for setting up speakers can be gotten? Their site has a download, but I have no means of getting that download to my system. 
I was just informed by Vandersteen that due to copyright issues, they can no longer sell, or distribute the Vandertones CD. No idea where to turn now. 
Yes, it is still available on the website, but only as an MP3. I haver no means of playing an MP3 on my system, unfortunately. I do have a streamer, and a NAS, but they only handle FLAC, WAV or DSD files. 
I have been fortunate enough to meet some great people in my now forty year audio journey. Jim has been incredibly kind, and more throughout this process. I can't possibly thank him enough. 


Thanks for all of the input. And thanks very much for the offer of help Tomic, I may reach out for setup assistance if needed. I do understand that the manual has a lot of setup information per a discussion I had with Richard Vandersteen, about these, yesterday. Hopefully that is of significant assistance. 

The room they will be in is very large, The listening area is about twenty feet wide by 15 deep. However, this is only 40% of the "great room" that the listening space is located in. Behind it, is the fireplace area, the dining room, and the kitchen. The ceiling are also vaulted.

I'm hoping to power these with my wonderful Conrad Johnson ARTse tube amp, with 140wpc per side, and a ton of gain. 

Listening volume will range from relatively quiet acoustic and singer songwriter selections, to now and then, loud, live rock concerts at something like at least semi-realistic volume. 
Fair to say I'm a bit baffled by the widely divergent opinions on the amount of power necessary. 

I do have a question that has me completely confused, though. It was explained to me, by the current owner, that you connect your preamp via interconnect cable, directly to the external crossovers/high pass filters, which then connect directly to your amplifier.

While a very unusual connection scheme, I can understand how that works. What I cannot come up with any answer for, nor can any of the three audiophile friends I posed it to, is, how do the internal amplifiers that drive the low end get a signal if the entire signal from the preamp is going into the external crossovers/high pass filters? We're lost in that regard. 
Tomic, thanks very much for taking the time to explain things. It's greatly appreciated. I already have the impedance of my CJ in hand ( Input Impedance 100 kOhms).And I can understand the benefits of the external hi pass filters being employed.

However, I still cannot understand how the internal 5a bass amplifiers get a signal so that they are aware of what to reproduce. The information associated with the music being played is sent from the preamp to the M5HP's, and those then connect directly to the amplifier sending the music signal information to the amplifier, which then provides it to the speakers. Do the speaker connections on the 5a's internally distribute the amplified signal to both the bass amplifiers (for the bass signals), and separately to the midrange and tweeters?  
I made the 5 hour drive (each way, not counting gas and food) to pick up the speakers today and all went well. VERY excited to have them home tonight with me. Beautiful Bubinga wood on these. And the surface is textured, a sort of crinkling that even adds to the look. 

Granted, after a brief glance at the manual (it has been a very long day) and all the previous comments, the setup on these seems pretty daunting. And I say that a someone who has successfully assisted and or set up at least a dozen speakers, of numerous brands, in the past. 

Getting everything locked down and optimized looks like  serious challenge, but, also clearly worth it in the end. 

Thanks to everyone for the explanations and assistance thus far in the process. Now I just have to wait for the single ended M5HP external high pass filters to arrive from Switzerland. I had to order them, as my equipment is single ended, and the speakers I purchased came with the XLR versions of the M5HP. Hopefully I can sell that and recoup that additional expense. I also need to quickly get in an order for the appropriate length of bi-wired cables, as I have nothing the right length, and every speaker I have is either terminated in bananas or spades too large to fit the terminal connections on the back of the 6a's. So, much as it will be painful, there will be a substantial delay before I can even start on this. :(
It appears that the standard spade connectors on speaker cables are, in general, too large for use with the 5a's. We checked two pairs of my existing cables, and two pairs of my friends (which he brought over earlier). All of the spade connectors were too large to fit the available space at the back of the speakers.

Which raises a serious question, which good quality (affordable) brands of speaker cables use spades that will fit?
tomic, thanks again, VERY much. I'm in Michigan, central part of the state and the loan of cables, especially right now, would be  a huge help. Thanks so much.

I'll look into the CD via the sources you suggested. And get the XLR filters listed to help to eventually fund cables. 

Thanks also, the veneer is really stunning.