S5 K-12 Kit sounds excellent with iPod, but relatively low volume with turntable?

[Soonerorlater]

Max, What kind of cartridge is in your turntable, ie magnetic or perhaps it's old fashioned ceramic,


Brgds Bill



Sorry Tinitus for reposing your question, should have read the thread more carefully

 

[Eli Duttman]

Guys,

What's the O/P voltage of an iPod? A "typical" ceramic cart. produces approx. 0.6 V. I think the odds on the OP having a MM cart. are long, as a huge difference in level was described.

 

[Maxwell Smart]

It's a late 70's Rega Planet, not sure in the difference between magnetic or ceramic, but I'm guessing magnetic?

Here's a pic (I love this turntable):

 

[Soonerorlater]

That would be my guess too, when you get a chance why don't you unscrew the headshell and see what cartridge you have. Manufacturer's data will tell you it's typical voltage output.


Brgds Bill

 

[Mosquito]

Yeah I mean, it's listenable without a preamp, but it's very low.

I do not understand, it's doubtful that a turntable of that era came with a built in phono out, so you are feeding the amp in directly from the cartridge, without any RIAA de- emphasis, and You notice only a low volume and no other sonic anomalies...
How it can be possible?

 

[Maxwell Smart]

Not sure but that's what it does. I picked up a cheapie preamplifier in the mean time to use with it until I figure out what I really want to use...I sense another project soon...haha.

 

[aardvarkash10]

dont forget that hte cart (almost certainly a moving magnet item) is designed to operate into a 47k load. In Max's K-12 amp the cart is presented with a 100k load - around twice the resistance and hence half the loading. Because of this the cart's winding will produce a higher signal voltage than its specification, and typically enough to JUST provide the amp with a signal - say around 10mV flat out. At that level you are not going to recognise the RIAA curve and its signature lack of bass - it all sounds tinny.

 

[Maxwell Smart]

Yeah, it's definitely gonna need a preamp, luckily I have one coming tomorrow.