**Sold** I have a Demeter BEQP-1 Bass EQ Preamplifier that I just pulled from my Lakland bass. I do not have the schematic for installation. I will not hunt one down for you. I suspect Demeter can get it for you but either way you are on your own...! The 9-volt battery clip is not attached (only the leads), but a new clip is included. Here is the product (though this has a red cover, not blue) http://www.demeteramps.com/shop/index.php?route=product/product&path=43&product_id=65 $65 shipped. Paypal is fine...you pay the $2.50 fees. Have a great day!