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dual bass treble

TomB19 said:
Those preamps look ideal. Thank you.
Click to expand...

In addition to the 2 band parametric EQ, they are certainly among the very best ever made, including the phono front end!
Find a write-up and see how many features they have that most don't, possibly all!
 
I managed to find a Yamaha C-80 in mediocre condition. I haven't torn it down to clean the pots or do any service or checking. Still, it seems to be working OK and the sound quality is pretty much equivalent to a Kenwood KA-7300 in brilliant condition.

I don't think many people understand the SQ a Kenwood KA-7300 is capable of. In good shape, they are absolutely wonderful.

After spending about an hour with the Yamaha, I've come to believe the parametric EQs are a magic bullet. To be able to dial in the upper and lower fringe response is heaven.

There may be something wrong with the loudness knob on my copy. As I turn it left, the volume goes down. All the way counter clockwise provides little sound but muffled bass. It's like the most brutal, sledgehammer, notch filter.

Oddly, it sounds amazing with the loudness knob turned about 3 degrees from the off position (just barely on). Any more than that and it seems to get weird.

If someone familiar with the C-70/80/85 could confirm this behavior, I would appreciate it.
 
TomB19 said:
I managed to find a Yamaha C-80 in mediocre condition. I haven't torn it down to clean the pots or do any service or checking. Still, it seems to be working OK and the sound quality is pretty much equivalent to a Kenwood KA-7300 in brilliant condition.

I don't think many people understand the SQ a Kenwood KA-7300 is capable of. In good shape, they are absolutely wonderful.

After spending about an hour with the Yamaha, I've come to believe the parametric EQs are a magic bullet. To be able to dial in the upper and lower fringe response is heaven.

There may be something wrong with the loudness knob on my copy. As I turn it left, the volume goes down. All the way counter clockwise provides little sound but muffled bass. It's like the most brutal, sledgehammer, notch filter.

Oddly, it sounds amazing with the loudness knob turned about 3 degrees from the off position (just barely on). Any more than that and it seems to get weird.

If someone familiar with the C-70/80/85 could confirm this behavior, I would appreciate it.
Click to expand...

The variable loudness is working correctly. With variable loudness, you first turn the loudness all the way up (clockwise). You then set the maximum volume you intend using with the volume control. Then, turning the loudness control counter clockwise lowers the level while applying boost to the bass and treble. Variable loudness comes closer to the ideal loudness compensation because it's based on how loud one actually plays music.

At realistic volume levels you usually don't need loudness compensation. In any case the conventional loudness switch is tied to what's known as a 50% loudness tap on the volume control. This means, as you approach 50% rotation of the volume control the compensation is lessened. Above 50% rotation there is no compensation.

You can download the manual for the C-80 from HiFi Engine.

There have been several other manufacturers that provide variable loudness (Nakamichi, Audio Research and others). They all work the same way.
 
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pfcs49 said:
In addition to the 2 band parametric EQ, they are certainly among the very best ever made, including the phono front end!
Find a write-up and see how many features they have that most don't, possibly all!
Click to expand...

that wonderful loudness control is one of them!
 
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