Old School Preamp Questions

[Monkeypimp]

So I am running a KILLER little 2 channel setup that consists of:
Gr Research N2X speakers
UFW-10 ( with the 650 watt amp, so much better than the other amps)
Marantz 3200 preamp
Marantz 140 amp
Thorens TD-166 mkII
SuperDAC 707 USB fed Flac files via computer

Needless to say I am in love with this system.

I do have a couple questions though about exactly what a couple of old features do to the sound:

1) What does the Loudness button do? When I have it on the bass tightens up the highs are expanded and overall it sounds far better.

2) There is a Tone Mode switch that I can set to out,in,250hz,4khz or 250hz+4khz....and when set to the numbered settings it sets the turnover frequency so if you select 250hz the bass is set at 250hz versus 500hz adn the 4khz is set from 2khz to 4khz....and then if you select the 250+4 then it does both.....what exactly is TURNOVER FREQUENCY?


The manual doesn't really explain either of these.

Here is a pic of the setup...not quite finished....waiting on my stands for the speakers then they will be off to the sides of the dresser.

[1BionicEar]

Nice little system.

Loudness does exactly what you said. It boosts both ends of the spectrum to compensate for the ear/brain's perceived reduction in volume of the highest and lowest frequencies when volume is below a certain level.

Turnover probably means crossover. This would allow you to select the center frequency for tone controls. I would leave them off of you are using the loudness setting.

[Monkeypimp]

Nice little system.

Loudness does exactly what you said. It boosts both ends of the spectrum to compensate for the ear/brain's perceived reduction in volume of the highest and lowest frequencies when volume is below a certain level.

Turnover probably means crossover. This would allow you to select the center frequency for tone controls. I would leave them off of you are using the loudness setting.

Thanks Bionic!! So the loudness just boosts the volume at the top and bottom? I kind of figured turnover meant crossover but thought some old timers here might know for sure.

[bunnyma357]

https://www.indecentmusic.com/school/materials/EQ.ppt

Here is a link to a powerpoint presentation about EQ's. It looks like the term "turnover" refers to the frequency of a shelf filter, where all frequencies above or below the turnover frequency are boosted or cut and the other frequencies remain flat - i.e. a high shelf or low shelf.

This is different than an EQ like a bell curve that would have a center frequency and a Q for the bandwidth effected, or a pass filter that would have a cutoff frequency and eliminate the signal above or below the cutoff.

You're lucky to have a working ULW-10 - I've had 3 of the "Beast" amps die, here's a video of the latest.

http://www.youtube.com/watch?v=xwA4jt-JYPE

Great looking system by the way - always lusted after the Marantz gear when I was younger.


Jim C

[Drunkonjack]

Nice vintage gear . I'm currently looking a Pioneer piece