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In the Forum: Analog Playback
In the Thread: Tell me about more about Ortofone SPU Sound.
Post Subject: Interesting: 25Dia VS SPUPosted by Romy the Cat on: 5/14/2005
 Brian Clark wrote: |
What you have there Romy is essentially the cartridge Ortofon introduced in 1948, the first production moving coil cartridge.
The motor is the same, just the "suspension" material changed from india rubber to a modern elastomer AFAIK. Also the G-style headshell only dates from 1959 (SPU introduction).
I will be VERY interested in your more thorough evaluation. I hummed and hawed between the CG 25Dia and the SPU Mono before springing for the latter, expected next week. My speakers could do with a bit of upper bass help.
I will be playing with both SME 3012 Series 2 and Series 1, the latter expressly developed for the SPU and also used by Neumann for playback of acetates on their cutting lathes. |
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I have no problems with 25Dia so far beside the slight sharpness and a very slight bass deficiency. It looks like the entire balance very slightly moved up but… it is a new needle. Also, despite that the balance is moved I feel that it more even then the SPU version. Anyhow, I use now a very minor negative VTA. When you used your 25Dia then can you recall a similar experience at the beginning of the cartridge live (sharpness and bass)? If now then I would add the10g-15g of effective mass and it will be it. If this cartridge is replica of the 1948 model then it should use a hugely heavy arm. No wonder that Ortofon does not quote its compliance on thier web site: presumably they did not want to scare people. I can actual see the there is not complaints in the cantilever when I lower this thing in the groove.
Rgs,
The Cat
BTW: the SME 3012 Series 1 use heavier tube and have heavier affective mass, so it should be more suitable to the 25Dia
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