My bass is ESP AP-SL5. http://www.espguitars.co.jp/original/ap/ap_sl5.html
With 2 Bassline SMB-5D pickups and Seymour Duncan STC-3M4 preamp.
I don't like the slap switch and bass boost on this preamp.
So I consider to replace it with Aguilar OBP-3.
I play metal,not only aggressive sound but also need variable tone on my bass.
How about SMB-5D work with Aguilar OBP-3?