Tone Controls can be so nice.


Of all the ways to tame, tighten or tone the sound of our systems, cables are usually the first to come to mind. Preamps, amps, source and speakers are all chosen for what and how they contribute to the sound and each affect the other in ways that confound, amuse and satisfy.

Anyone who's paid even scant attention to what I like in my system knows that I've always wanted to hear further into the recording, extracting as much as possible from those shiny discs and not pay the price of loss of tone, richness or body. From sliver ICs to power conditioning and boutique fuses, each step has gotten me closer, revealing more detail, nuance, air and realism.

One day while listening I chanced to look at my Marantz PM-15S2b and it dawned on me that I hadn't tried the tone controls since the first time I tried them when new. I didn't like it then. Just switching it on without adjusting the controls it was evident there was a difference for the worse when used.

Time can do funny things. It may be due to something as simple as break in but when I engaged the tone control setting and adjusted the bass a tad (1 1/5-2db) a lot changed. Everything I liked about what I already have was fleshed out some more without a single, negative drawback. Tone improved. So did body. Percussion was easier to believe be it wood, brass, etc. Vocals had more chest and in the room presence. Piano had more weight, guitar more blues and twang (steel easier to tell from nylon). Even decay took on a different quality since the lower portion of the notes had more presence which led to a longer, more believable decay. Decay used to be the in the realm of the higher notes, the lower ones foreshortened, and now decay is across the spectrum which makes piano, upright bass, anything in that realm all the more authentic.

I dialed it back to just about a 1db boost and still had that magic. Nothing was shelved back, hidden or muted as a result. Just fuller, like a really good tube setup with great see-through ability. No bloat. No smear.

It's too bad that tone controls aren't in vogue nowadays. Blame the purists and thank those that still use them (Marantz, Luxman, Accuphase, etc.) I'm not advocating some all out assault with extensive equalization but in my case the bass boost is just at the 50Hz region and covers a small, but critical range for folk like me. My Tonians drop off at 40Hz and the drop slopes well before that. That little boost is all it took to even the frequency playing field, so to speak, making it seem all the more real. This is not to say I didn't have bass to begin with. What I did have had texture, detail, nuance but not enough force to have equal billing in the presence department.

If I had speakers that extended lower, all of this wouldn't matter. In my case it did. This is not to say that everything is better with tone controls but is some cases, certain recordings can use that little bit of boost and some systems, like mine, can benefit from it. It's been only a few days since I've done this but I've yet to tire of it and find myself loving what I'm hearing. Who knows?

All the best,
Nonoise
128x128nonoise
Ones room alone prohibits playback identical to that intended by producer/engineer. There is no reason to discount the use of tone controls to those who find benefit from there use. My current pre lacks tone controls, and when I had them in my system I rarely used them. A choice I made, not a declaration.
Trying to adjust for room responses would require sophisticated equalizer - it is better to fix the room.

Poor systems apply such pronounced and complicated sound equalization curve that every record played on them will require different tone adjustments to make it sound acceptable. On very good system all records sound fine without any tone control. At least it was my experience.

Tone controls won't fix poor recordings - it is just not possible. Even adding a little weight to lower piano registers is not possible without also adding weight to upright bass, making it possibly too loud.

Tone controls affect imaging unless it is done in digital domain but then you add losses on A/D and back D/A conversions.

Of course ICs and speaker cables are tone controls, to a smaller degree, but I try to minimize it using short neutral sounding cables. Using tone controls is voluntary injecting into system devices, that screw up clarity and imaging (certainly not improve it). I guess I'm one of those bad "purists".
Very nicely done writeup, Nonoise, as are many of the responses IMO. I particularly enjoyed Trelja's witty post.

That said, as I see it there is no right or wrong when it comes to this issue, and the tradeoffs that come into play involve a great many variables that are specific to each individual. FWIW, I happen to be a "purist" when it comes to tone controls, and my outlook coincides with the one Kijanki expressed just above.

Although I do find myself intrigued by the relatively recent developments in DSP (digital signal processing)-based room correction, such as the DSPeaker Dual Core which Roscoe mentioned, and at a vastly higher price point the recently introduced Trinnov Amethyst. (Software-based approaches would be non-starters in my case, as I have no desire to undertake the time, effort, hardware expense, cartridge wear, and probable sonic compromise that would be involved in digitizing my record collection).

I would add that one point that tends to be overlooked in discussions about tone controls is that they do not come for free. Implementation of a tone control or equalizer function to a high standard will, it seems to me, significantly increase the complexity and cost of whatever component it is included in, or else necessitate compromise elsewhere in the design.

Best regards,
-- Al
I have a Luxman class A integrated with tone controls and a bypass button. I don't mess with the tone controls. I also use a Rel Stadium 3 sub. I do on occasion only use the top section of my Parsifals. This helped me understand how bass and room interaction make up 99 percent of the listening experience. Always trade-offs. If my next life involves audio I will master the room first.
Problem is even a treated room won't give a flat response all times. I know as I have a treated room. A treated room is a starting place.....