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Petar, I believe I remember reading somewhere that Reps sources his cones from the German firm, AER, or their OEM, whoever that is.  Perhaps you know of AER's Lowther-alike drivers?   However, the Reps cone is still very similar to the Lowther - different treatment, but similar, with very similar ribs, and also very thin paper; perhaps thinner than the Lowther.  I can't say for sure, but the Reps' "too-soft" surround might make movement easier on the paper than it is for the DX4.  It sounds as if this is the case.  Since my Reps are without whizzers, straight comparisons with my Lowther DX4s are not really possible, but the Reps I have sound generally more "calm" than the DX4s.  Of course, the DX4s also suffer from whizzer cone break-up ("roll" notwithstanding), which the Reps I have (obviously...) do not...

And now that I have had more time to reflect on it, I suppose it is likely that the Reps' voice coil has at least 2 layers - hence the "perfect lay" reference in Reps' flyer.

The thing is, one can't avoid hearing the Reps' spike.  Although I admit I have not actually measured it for myself yet, the very sharp 2.1k Hz notch filter I just put in improved the situation considerably, so I must have gotten close.  I am not sure about problems in the "drum range", but I presently think it has as much to do with the room, etc. as it does with the Reps.

As you know, the problem with all the thin paper drivers is the cone break-up that effectively "converts" the pure tones into mostly higher frequencies.

And the problem with the heavier paper drivers is that they are so slow and "homoginized" by comparison to the  lighter cones.

Based on past experience, I know I prefer a nice 10" driver as the aural pivot for my speakers.  But I have no idea where to turn for a 10" driver today.  I have thought about trying the Supervox 285 GMF (obviously, it's larger than 10"...), but that would force me to x/o in the voice range.  I am not sure if I would change the fundamental pitch much with Supravox's 215.  I also had old Peerless 8" drivers that were "nice", but I always preferred the 10", in context.  I can say from memory that the Lowther is much faster than any "comparable" Peerless!

All I want is wide-range drivers as fast as a Lowther DX4 or Reps R1 with the tone of the old (late 70s/early 80s) 10" Peerless!  Is that asking too much?

Best regards,
Paul S

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