Hello everybody,
I am new in this forum,
I have very poor range and speed on cap xl,
can some one help me with this issue?

It would be nice to see the AP configuration.

Shure,

# model = RBcAPGi-5acD2nD
# serial number = E4F30FCF88B7
/interface bridge
add admin-mac=DC:2C:6E:BB:C5:12 auto-mac=no comment=defconf name=bridgeLocal
/interface wireless
set [ find default-name=wlan1 ] adaptive-noise-immunity=ap-and-client-mode band=2ghz-g/n channel-width=20/40mhz-eC country=israel disabled=no frequency=auto \
hw-protection-mode=rts-cts mode=ap-bridge name=wlan1-2G preamble-mode=long ssid=XXXXXNet station-roaming=enabled
set [ find default-name=wlan2 ] adaptive-noise-immunity=ap-and-client-mode band=5ghz-a/n/ac channel-width=20/40/80mhz-eCee country=israel disabled=no disconnect-timeout=\
5s frequency=auto hw-protection-mode=rts-cts mode=ap-bridge name=wlan2-5G preamble-mode=long ssid=XXXXXNet-5G station-roaming=enabled
/interface ethernet
set [ find default-name=ether2 ] poe-out=off
/interface wireless security-profiles
set [ find default=yes ] authentication-types=wpa2-psk eap-methods="" group-key-update=1h mode=dynamic-keys supplicant-identity=MikroTik wpa2-pre-shared-key=XXXXXXX
/user group
set full policy=local,telnet,ssh,ftp,reboot,read,write,policy,test,winbox,password,web,sniff,sensitive,api,romon,dude,tikapp
/interface bridge port
add bridge=bridgeLocal comment=defconf interface=ether1
add bridge=bridgeLocal comment=defconf interface=ether2
add bridge=bridgeLocal interface=wlan1-2G
add bridge=bridgeLocal interface=wlan2-5G
/ip neighbor discovery-settings
set discover-interface-list=!dynamic
/interface wireless cap
set bridge=bridgeLocal discovery-interfaces=bridgeLocal interfaces=wlan1-2G,wlan2-5G
/ip address
add address=192.168.20.10/24 interface=bridgeLocal network=192.168.20.0
/ip dns
set servers=192.168.20.1,8.8.8.8
/ip route
add distance=1 gateway=192.168.20.1
/ip upnp
set enabled=yes
/system clock
set time-zone-name=Asia/Jerusalem

Set frequency manually
Give wifi-qcom-ac a try, that requires 7.13 and up.

I might add to choose region=Brazil for both radios.