Graham Slee’s Blog

News and views from Graham Slee about electronic audio design, the audio industry, Graham Slee audio products and more.

The Resurgence Of Vinyl – Deja Vu (All Over Again)?

Almost every year since 1995 it’s come to my notice that vinyl is having a resurgence of interest.

Only the other night on TV there was yet another article spouting statistics about the resurgent interest in […]

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Why Rumble Filters Are Bad

The beginner to records might think a rumble filter to be a good idea because it attenuates warps and bearing noise. However, it isn’t all that clever because it also attenuates the low bass frequencies […]

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Valves – on a Graham Slee product?

This post has been distilled from forum posts by Graham to make the journey of discovery easier reading . . . Enjoy!

Yes, the V (or T) word has been uttered at ‘Slee towers’…

And four valves […]

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A Different Approach to Record EQ: Part 5 (final part)

To recap: I’m equalising the cartridge and then equalising the record (with a very slight compromise). It would seem that all existing techniques of equalisation treat the cartridge response and record response as one and […]

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A Different Approach to Record EQ: Part 4

You’ll have heard of a thing called frequency response? But do you understand loop-gain?

You will have seen a frequency response plot of something you bought like a cartridge, amp or speakers. There’s a “y” axis […]

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A Different Approach to Record EQ: Part 3

Homogenous must be the least-used word in hifi, but as we found in part 2; it describes the type of RIAA EQ used in phono preamps to a tee.

Stanley P. Lipshitz and Walt Jung (both […]

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A Different Approach to Record EQ: Part 2

Part 1 might have ruffled a few feathers…

I explained we’d ended up with RIAA record equalisation to marry-up the front end and the back end. The front end being the record cutter, with its linearization […]

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A Different Approach to Record EQ: Part 1

What have records both vinyl and shellac got in common with this illustration?
(“Piezoelectric sensor frequency response” by Omegatron)
It illustrates the useful frequency range of a piezoelectric material. The type of pick up cartridge commonly used […]

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