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Primaluna Dialogue Premium Integrated driving Magnepan .7 with Bypassed Fuses

Hi everyone,
I am a relatively new audiophile, joined Audiogon 2.5 years ago, and this is my first post. I enjoy reading the forum very much, and would like to say thank you to everyone who has shared their knowledge, wisdom and humor with me. For this my first post I am looking for advice: I have a pair of Magnepan .7 speakers with bypassed tweeter fuses, and I am wondering if I can safely drive them with my Primaluna Dialogue Premium amplifier. The amplifier has 4 ohm speaker connections, and using KT120 tubes in ultralinear mode it produces 43 watts per channel (per specs). What I don't know is how much current it can provide the Maggies which I understand draw a lot of current (I have not seen an impedance curve for the speakers). My listening room (aka living room) is approximately 13' x 16' x 7',  with partially treated walls and corners. The speakers are on the short side about 3.5' from the back wall, I sit about 7.5' away from the speakers, and I listen to music at around 60-65 dB (C-weighted), sometimes peaks in the low 70’s. So my question is: am I taking an unnecessary risk driving the Maggies with the Primaluna? Can I damage the speakers if I play them too loud? In case you are wondering, after I bypassed the tweeter fuse and attenuator connections, the speakers sounder much clearer and precise to my ears in my room with my system.

 

 

classic8

Showing 2 responses by bdp24

bdp24's avatar
bdp24
10,184 posts
 

Great post @krelldreams!

I’ve heard of some guys using the RM-10 strapped for mono, in pairs. I went to the RM-10 release event at Brooks Berdan’s shop in Monrovia, where Roger discussed the design of his little amp. After the talk I spoke with him for a while, and asked him if he recommended a pair of RM-10’s for use with stacked Quads (which I at that time had), or a single RM-9 instead. He said the RM-9, for its’ greater headroom..

The next time I saw him he told me he had been thinking about my question, and had actually changed his mind; he now would recommend a pair of RM-10’s over a single RM-9. I think I remember @clio09 saying the RM-10 had become Roger’s favorite push-pull amp of his own design. I use one with my Quad ESL’s (a single pair, not stacked). Being a Roger Modjeski fan boy (a badge of honour ;-), I have all three of his push-pull amps: an RM-9, -10, and -200, all Mk.2 versions.

bdp24's avatar
bdp24
10,184 posts
 

@krelldreams: Have you heard the Music Reference RM-200? Modjeski designed that amp to be unique in two regards:

1- Produce 100 watts (per channel) from a pair of KT-88’s or 6550’s.

2- Play well with low impedance loads (like Maggies). The output transformer taps are 8 ohms, 4 ohms, 2 ohms, and 1 ohm!

 

@curiousjim: Modjeski was a big fan of the Acoustat panels, less so of the original dedicated amp and even less so of the transformer that replaced it. He designed an amp specifically for the Acoustats; perhaps @clio09 can tell you all about it if you are interested.

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