Magnepans


I'm kinda new to the plannar/magnepan world, but I am really interested in trying out a pair after all the reviews I've been reading. From what I understand these speakers are quite power hungry. What is the minimum I need to properly drive these? 
I currently have a VAC Avatar integrated tube amp. These are the stats:
Type: Integrated vacuum tube amplifier with MM phono stage and home theater (direct power amplifier) mode.
Tube Complement: two 12AX7 low noise (phono), two 12AX7 (line stage), three 12AU7/6189A (power amplifier), and four EL34 (power amplifier)
Options: Remote control for volume (motorized direct control) & mute
Power amplifier ("Home Theater" direct mode):
Output matching: 4 or 8 ohms nominal
Power output: 60 watts/channel ultra-linear; 27 watts/channel triode
Frequency response: 9 Hz - 35 kHz +0 / -0.5 dB, 3 Hz - 71 kHz +0 / -3.0 dB
Power bandwidth: 11 Hz - 63 kHz + 0 / -3.0 db ref. 50 watts
Gain: 25 dB ultra-linear; 23 dB triode
Residual noise: 1.5 mv at 8 ohm output
Channel separation: -72 dB @ 1 kHz; -60 dB @ 10 kHz
Line stage preamplifier:
Gain: 24 dB
Maximum input signal: Infinite (attenuation precedes line stage)
Noise contribution: Approx. 0.1 mv at power amplifier output 
THD contribution: Approx. 0.04% 
Tape output: Unity gain from selector, non-inverting 
Phono stage preamplifier: 
Gain: 37 dB (measured at tape output)
MC phono stage in place of the MM optional 
Residual noise: 3 mv at output (S/N ratio approx. 69 dB) 
Overload: 117 mv @ 1 kHz = 8 volts RMS output, 460 mv @ 10 kHz 
Frequency response: RIAA +/- 0.25 dB 
Notes: Does not invert absolute phase. 

Anyone know if these will do or if I'll have to upgrade? Love the tube sound . . . will I need to go solid state for Maggies? Thanks for putting up with the noobie question :) 
the_nature_boy

Showing 13 responses by the_nature_boy

A lot of great info here. Thanks so much! Quite a bit to consider with this next purchase(s). 
Heard something about SERVO amps being a good option? Not necessarily going that route, but as long as I'm considering switching out my current integrated amp I might as well put it out there. 
Tim, thanks for all the info and the mention of class D. I will look into that as well.
Larry, the maggies I'm looking at happen to be 2.5's so might not have to get rid of my VAC? 
The other key piece of info, I suppose, is the listening area. I'm setting them up in my living room, so it's an open space with furniture (and wooden floors) I'm working with. Not sure if this automatically means more power needs  . . . the immediate listening area is about 250 square feet, but the whole room is about 650 sqft 
Thanks for all the great info, guys! A lot of really good options to think about. 
Anyone else hear about SERVO amps working well with these speakers? 
PS
I am listening in a rather large sized room (IMO)  . . it's a living room area with wood floors and it's about 650 sqft more or less. Maybe closer to 700. I have a pretty varied musical taste (as many people here tend to have), I tend to listen to a mix of classic rock, prog, jazz and classical. 
Stewart0722,
So both the  3.7s and the 1.7i would be upgrades to the 2.5's I'm looking at? I'm not quite a Magie expert, so input like this is definitely very valuable. If I can get a better speaker for a reasonable increase in price I can definitely look into it. 

Tim,
I can start out by testing them with the avatar and if they are falling short, then I would switch out components. Class D was something I had not considered, but you are definitely making a strong case for them. Specially if I can get a tubey sound by preamp. I didn't know preamp dictated the sound as much as it seems to; I always thought amps would color your listening experience more than a preamp. 
Stewart,
1.7 is also > 2.5r or only the 1.7i that you mentioned? 

Randy,
you're saying the 3.7 is better than the 1.7 or vise versa? 
Randy,
I think my listening room is a bit on the large size, so guessing the 1.7's would be better suited? 
Setup is in my living room area which merges right into the dining room, so it's a good percentage of the whole house. The whole house is about 2100sqft, so I'm guessing living/dining area are about 700-850 sqft, roughly
A lot of awesome amp and preamp info!  . . . any suggestions on speaker cables that might be well suited to Maggies? Or is that almost completely up to personal preference? 
OK, last follow-up, I promise :)
Anyone here very knowledgeable about Magnepan mods? I've been reading through a LOT of material out there and seen some people invest in upgraded crossover boxes (though not sure those are meant for all Maggie models?) and others invest in fuse bypass. 
Is there any mod that I absolutely should invest in? Any that really make a big difference in these speakers? Thanks!!! 
Hey Guys!
Sorry i haven't posted in a bit . . . holiday shopping and all, you know how it is. A lot of great info!
Budget-wise, I'd say about $500 tops in speaker mods. Unless it's something that was gonna push this speaker to a significantly superior level. 
As for speaker wire, from what I've read here I might just go with what I already have and then try other stuff if I feel the setup needs it
PS
To be more specific:

Current speaker budget ($1500-2000) 
Speaker Mod Budget: ($500ish) 
AMP budget (about the same as speakers)
Apologies if i seemed a bit dodgy on the budget question, but my budget is somewhat fluid and i did not want to pin myself down to a specific parameter. If I find a setup that's $10,000 (amps and speakers) that's above the budget I just listed, but if it's something that completely is gonna blow me away I could consider going for it. Plus there could be people looking at this thread that are willing to go into the $20k and $40k range that could find the info useful as well. 
So . .. any recommended mods? Fuse bypass seems to be very highly touted in the Maggie circles :)