Platter damping O-Rings Garrard

[Mike]

That seller has some very nice items from time to time. Often had some tasty Koetsu's in the past.

Anyone fancy this?: http://cgi.ebay.co.uk/IKEDA-IT-407-G...1%7C240%3A1318

[pure sound]

Yes please but in the silver colour!

[purite audio]

Sticky bearings!

[Marco]

They are low output, not quite Io silly but lower than most. A high ratio tranny would suit.

Something like this on its 1:72 setting would be pretty good I'd have thought.

http://cgi.ebay.co.uk/Highphonic-HP-...3286.m63.l1177

Looks interesting, Guy! What about this:

http://www.joynetmall.com/shop/produ...oducts_id=3025

I don't understand what it means by "Power ratio 25db". Is this an indication of the step-up ratio? If so, does it have as much gain as the one above?

Marco.

[pure sound]

The link doesn't work but

25 dB of gain represents a ratio of about 17:1

the 72:1 ratio would be more like 37dB of gain

I don't know (haven't seen a spec) but I'd guess the A23 has gain more like the first one

[Marco]

I suspected as much. The A23 has a ratio of 20:1, which isn't quite enough for the SL-15, so I guess 72:1 would be about bang on.

http://www.joynetmall.com/shop/produ...oducts_id=3025

That should work - it does for me.

Marco.

[pure sound]

Does for me now, didn't the first time. ???

[Marco]

I guess that the Ortofon isn't really suitable then?

I'm swithering between the Highphonic and the Ortofon SPU version of the A23:

http://www.shindolabs.com/auditorium23/a23stepup.html

I would imagine the SPU version would work well with the SL-15. Which one would you go for?

Marco.

[pure sound]

I'll be honest & say I've no idea! The Highphonic looks to have the gain needed and will doubtless sound very good. There's someone on Wigwam who has one & used it with an Io but still needed a bit more gain so bought an ANUK S8.

There are no specs given for the A23 either in the review or on the A23 website so I can't really offer a view. The reviewer obviously likes it but uses a Planar 3 & Shindo stuff which seems an odd combination.

The Highphonic is useful in that it also does have a 20x setting too which means it'll have the flexibility to be used with just about any cartridge you ever get. if pushed it'd probably be that one I'd choose if their respective prices are similar.

[Marco]

Thanks for that, Guy - appreciated

I'll see if I can get the A23 SPU SUT specifications from the designer Keith Aschenbrenner. I have his contact details somewhere. He might also be able to offer advice if the SL-15 has very similar requirements to an SPU.

I suspect that's the case, do you?

Also, with the Highphonic it says: "Input Impedance 3-40 ohm". Does that mean it's adjustable? If so, I can't see can any switches which allow adjustment - or does it mean something else?

Marco.