slow ap to host speed

i have the following setup

RB2011UAS-2HnD is in station bridge mode with wifi and lan ports bridged
RB951Ui-2HnD is setup as wifi router, wifi and lan ports 1-4 on bridge, port 5 connected to adsl modem
tp link AP or 7800n as AP (dhcp server disabled)

lan lead -------
wifi link ^^^^^^^

PC -------------RB2011UAS-2HnD ^^^^^^^^^ RB951Ui-2HnD-------------7800n or TPLINK AP ^^^^^^^^^^^^^^^ notebook

what i am finding is that the performance of a file transfer from my PC to my Notebook is very slow, around 1115KBps to 400KBps max.

If i hard wire the notebook to a lan port on the RB951Ui-2HnD i get around 3000-4000KBps transfer rate.

i have tried a 7800n billion and a tp link AP and both provide the same results

the RB951Ui-2HnD is setup on channel 1 with 20/40Mhz

the 7800n or tplik is setup on channel 11 or 13 with 20Mhz

anyone have any ideas?