Welcome! Need support, you got it. Or share your ideas and experiences.
Anyone using mono blocks put them behind their Maggies or other dipole planar speakers. I'd like to get a pair but the only space I have for them is behind the speakers. They wouldn't be directly behind them, back and to the inside but not directly beside them.
$12,610 (Chinese Yuan) $1800 USD
They don't hide their plagiarism very well.
$1800 US will just about buy you a used Music Reference RM-9 or RM-200.
Putting mono's behind a speaker (especially dipoles!) is a bad idea, even worse is putting them on the speakers feet, sound waves and feet vibrations are not exactly the things you want to inflict on your amp's! I'm always amazed to see people place amp's on(or near) speaker feet and then use some kind of vibration control device to fix a problem they self inflicted.
Putting them BESIDE the speakers(like Granty) is a good idea, 3 feet of decent sp cable is a lot cheaper than 9!
What kind of electrostatics are those? Looks like your listening space is in an upper level dormered room. The best room I've ever had was a dormered space with the angled walls starting about five feet up. I had no room treatments but I wasn't using Magnepans at the time.
which would now be referred to as a U-790 denoting height of panel in feet and radiation angle.
Looks like your listening space is in an upper level dormered room.
Exactly! It is essentially a large bedroom that spans the depth of the house with dormers both front and rear. I get very neutral bass response as a result. :)
Click my moniker and follow to more info and pics.
The tube traps can't hurt. Did you build the diffusers behind the speakers? From down sizing my listening room is much smaller now and sounded like crap before I treated it. I couldn't even get small monitors to sound worth anything in there. Real bass traps, by that I mean 2x4 four inch thick rockwool panels in each corner and lots of absorption on the walls, it now supports Maggie 1.7s quite nicely. When we retire to VA I'll make sure to find a house with a lower level or something with more size for an audio room.
The tube traps can't hurt. Did you build the diffusers behind the speakers?
Absolutely. I experimented extensively with placement of both traps and speakers. I found that stuffing all the big ones in the corners and using about an eight foot to front wall placement measurably improved bass linearity.
Actually, I built the bass traps using this recipe while the diffusors are commercially available RPG Skylines.
Glad to hear of your success with the 1.7s. I've been using one form or another of room treatments for over thirty years. Room dimension ratios matter too. The upstairs room is approximately 26 x 15 with a slightly extended section for half the width at the rear. While the "Golden Ratio" is 1.61, the primary room dimensions are close at 1.56. I've found such minimizes room modes.
Wifey and I are in the process of a home remodeling project (9 weeks in!) that combines the kitchen, family room and butler pantry areas while also moving the outside wall five feet further out. French doors leading outside will flank the fireplace. You may have seen the pic of the 1+1s in the home theater. That wall in front of the speakers is now gone (about where the exposed LVL beam is) and system orientation will be reversed. The dimensions will be both larger and closer to the Golden ratio.
I'll be able to tuck some of the gear in what will be the hidden closet to the right with only the processor and cable box sitting under the monitor on an invisible shelf. All cabling will be shuttled through conduits in wall and under floor between wall and speaker.
Why would you want to hide all your gear? :)
I just want to hide those that really don't need to be seen like the power amp and the Blu Ray player. Most importantly, I want to avoid having a visible morass of wires like this:
What will be seen is the Emotiva processor and Motorola cable box - both of which need line of sight for remote control use. All the wiring, however, will be out of sight in their hidden chases and not collecting dust bunnies on the floor. :)
As an aside to this thread - can you drive your U-1PX speakers to fairly high volumes or do they eventually self-protect like my Quad 2905s? I'm not aware of anywhere in UK one can hear Sound Labs speakers.
They can play at fairly high volumes with the 300 watt per channel VTL amps. Since I originally purchased them in 2005, there have been improvements in sensitivity to both panels and backplates improving output.
They're burned in at the factory driven by an 800 watt amp. ;)
Three modded Musical Fidelity 750w superchargers - (and household dust!) - behind my Quad 2905 x2 and Quad 2805 x1 front channels. Overkill for sure but always used with care. The obvious advantage being short speaker cables.
If you're still considering a stereo amp, I've used this very successfully with Apogee Calipers, Quad ESL-63's, B&W 802D's, Acoustat Model 1's and a friend's Apogee Scintillas:
H2O Audio S250 Signature
There's a 6moons review you can read. It will easily drive any Maggie. I also have it for sale.
Now, if you're still into monos, then I'd suggest you consider making some cables from copper foil inductors. About 1-2 inches wide, 12-inches long, so the monos would be very close to the speakers. Wrap each leg in saran wrap, terminate with your choice of connectors or just twist and wrap the ends on the binding posts.
Of course, you can also do this with a stereo amp and longer runs.
This is NOT my original idea but rather a guy on the old Apogee forum (Vince, aka muralman1). I sold mine with the Calipers so didn't "write the recipe" but I did use Jantzen inductors.
Very cheap and excellent performance!
Mine are designed to be behind the speaker. I do cushion them a bit with an old beach-blanket. No problems to report at all. Sounds better than great.
Is there any other way?? : )
What happened to your wood diffuser ???
How about such a one?
More like Roger; I'm vertically bi-amping.
Yes, there's always masking tape and wires on my floor. :)
What amps are those Grant?
Hey Grant, this is Terry D in Iowa.
As you then can have very short spkr cables. :-))
Roger is actively bi-amping - hence he uses a stereo amp with each panel.
I actively tri-amp - hence I have a stereo amp (mid + ribbon) and a monobloc (for the bass panel) behind each spkr.
I was just wondering about all the energy coming out of the back of my 1.7is vibrating the chassis of the amps. Of course with dipoles there won't be as much going down towards the floor where the amps would be. I could also put one of the amps in the bottom shelf of the rack where the stereo amp is now. I'm not even sure yet if I'll be going with monos. I'm also looking at a Vincent SP 332. The monos would be Emotiva XPA-2 DR1s. I know, night and day power wise. I'm only considering them because of their dual differential topology and price and the fact that they're mono blocks. However I've been hearing good things about the Vincent and even one guy using it with 3.7s. It has 80,000uF of capacitance so it must produce a healthy amount of currant despite it's moderate power rating.
Not necessarily so. You need the specs of how many watts it produces into 8 ohms and then into 4 ohms, to decide whether it has a stiff enough power supply to drive Maggies well.
For instance, the monoblocs I use on my bass panels I've measured to clipping (with dummy loads) as:
* 100w into 8 ohms
* 180w into 4 ohms.
Which is not too shabby! And they sound great. :-))
I have a stereo power amp behind each speaker.
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