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In Reply to: Musical joy and other priorities posted by MaggiesAndCats on August 27, 2010 at 11:27:44:
Hi Steve,
Nice to hear from you. Your MGIII restoration project sounds very cool. Look forward to hearing how you get on when you eventually do it. I guess when you say they need a rebuild they have delamination problems etc? the MG3.3Rs I bought have banana peel at the ends on the bass voice coils. I have ordered some DAP to fix it, - just curious have what you are going to use to glue any loose coils down?
I really like the MGIII, - my Dad had a pair and I loved them. From what I have heard so far I say I would preferred my Dad’s MGIIIs to the MG3.3Rs I have now. But different rooms and I’m not sure these 3.3Rs are 100% in the tweeters. The drivers are near to the same I think so maybe I just prefer the different crossover config in the MGIII.
If you ever did decide to try the high pass PLLXO with your MGIIIS, - its so easy, - just a capacitor as its 1st order. I have to use 2 caps and a resistor as the HP on mine is 2nd order. You idea of triamping sounds good, - but Satie covered this in the recent MGIIIa thread, - it is not completely straightforward to triamp a 3 series Maggies like that with one active crossover as the stock crossover design is asymmetric. It would work for sure but its possible the driver integration might not be as good as the stock alignement (according to Satie).
And from what Satie tells me about driving the tweeter directly, you need a good near impedance doubling power amp that is happy with a 2 ohms load, preferably a class A. A suitable low powered tube would work but it I am not sure, - it might clip unless you like your music quietish?. I am guessing a 100W solid state pure Class A pass labs or something similar would be more suited, but I might be wrong!
I would not mind trying the MGIII crossover setup in my MG3.3R actually to see if I prefer it, - I can easily program MGIII type 3rd order LP and 1st order HP from the Behringer but the internal crossover in the 3.3R obviously has different values form the MGIII, Not sure if it would work?, - perhaps Satie (if you are reading!), - do you have any ideas whether this might work or not?
Anyway Steve look forward to hearing how you rebuild goes! Looks like a bit no compromise job!. Just wanted to ask too *if you can remember), - what setting do you use on your Behringer? I am guessing around 350Hz 3rd order Butterworth Low pass and 1st order 800Hz high pass.
All the best,
Colin
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Follow Ups
- RE: Musical joy and other priorities - Davy 15:15:58 08/27/10 (0)
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