Help a newbie understand


So the pandemic had me listening to a lot more music and as a consequence, I sold my 30-year-old but still functioning Snell c2 mk4 speakers and Adcom GFA 555 200 watts per channel amp which together sounded great ( to my uneducated and now failing hearing ) playing my digital library of CDs.I wanted to try something different.
I replaced them with Canton reference 9k monitor speakers ( which can handle 200 plus watts and a Technic su g700 integrated amp. max. 70 watts a channel. These also sound great in many different ways. By the way I bought both on Audiogon.

What I miss in the new system is its ability to play loud( I'm old and going hard of hearing) this has led me to play the amp at levels between -10 and 0 per the amps "wide range scale peak power meters"  and at those levels, the needle occasionally spikes into the region slightly above 0  for fractions of a second to a second or two but not ever reaching +6( the next demarcation on the meter) per the integrated amp's meters.

My fear is frying my speaker's voice coil etc. by clipping when I play at the above level so I have two questions. First, is the headroom sufficient to prevent frying my speakers given the listening level and the volume's slight venture into going over 0 on the meter and second how do I read this "wide range scale peak power meter"?
The peak power meter's main demarcations are as follows-50/0001,-40/001,-30/01,-20/.1,-10/10, 0/100,+6/200.and under those numbers is the symbol db/%. 
So I went online but could find nothing that I could understand relative to how to read this type of meter. For example, if the relationship is dB/% what does  -50 represent and the % 0001?, what about 0/100,+6/200?The top numbers make no sense to me -50? -50 what no watts who's on first.
Thank you in advance for your time and expertise.
scott22
..looks like you just did a lateral arabesque.  Those Snells are really good.  Anyway, the best sound for the least dollar spent can be had with good headphones and a headphone amp.  ....or....you can be absolutely amazed as I was with a Sony Walkman music player and the top Grado in ear headphones.  ....and its portable too.
Add the Sound Analyser app to your phone and measure how loud your music is at your listening position. If over 92dB, you are harming your hearing. That said, add a REL S sub and use it to augment your speakers. You’ll have a blast and you won't feel the need to push the main speaker volume where mid and treble energy do the most hearing damage.
darn good advice from noromance

subs (a pair ideally) really unlock the sound potential of monitor style speakers - can be truly transformative of systems
Stringreen I loved those Snells but after 30 years I just wanted something different that was in my limited budget and geo proximity. The Snells also were power-hungry but the Adcom had 200 watts per to drive them. A lateral arabesque indeed but one from the tutued hippos in Fantasia to Misty Copeland at NYC.
Noromance great suggestion thanks. I love how helpful folks are on this site so willing to share their knowledge. to quote  Blanche DuBois  "Whoever you are, I have always depended on the kindness of strangers." 
Coincidently this morning Paul McGowan had this valid observation in his soft sell  for PS Audio.