I have an Ibanez Cerro single cut 5 and I just love the instrument. I replaced the stock MK-1's with Nordstrand Big Splits and it was an immediate improvement. But, after a while I'm thinking, these Big Splits just aren't sounding as good as I hoped they would. I've always liked the stock Ibanez preamps and I've had experience with Bart and Demeter preamps but I wanted to try something new in this bass. Enter the Audere 4 Band Classic. I ordered it with the battery status led and had it in 3 days. Audere's customer service is beyond outstanding too, they answer the phone and are a wealth of information and assistance. The preamp was a breeze to install and all I can say is WOW, the bass sounds like someone took a blanket off of the speaker cabinet. The pickups just exploded with frequency range and clarity. The preamp is dead quiet and the 4 EQ pots are Low (180), Low Mid (250), High Mid (750), and Treble (3.2K). The Audere Classic has really opened this bass up. I used the Cerro in the pit of "Newsies" over the weekend (I'd been using my stock BTB33) and the drummer told me how great it sounded and that the definition was incredible. (this drummer has great ears and I trust him) There is always a struggle playing in the pit where the Keyboard 1 book is written to double a lot of the bass parts. The challenge is making the bass guitar EQ not fight with the piano and bass drum for the low end space. It can get muddy and sound terrible really fast. With the Audere, I was able to dial it in perfectly. I reduced the 250Hz Low Mid and boosted the 750 Hi Mid to give it some point and the sound just popped. I actually had to roll off some high end. The Audere is a very well made and well thought out musical sounding preamp. It works great with Nordstrand pickups and I couldn't be happier. I was so impressed that yesterday, I ordered their 3 band classic preamp with the (250, 500, 750) mid frequency switch for my BTB33. This preamp is voiced differently than the 4 band and it will be interesting to see how it works with the stock Ibanez "bartolini" BH2 pickups. I'll do a follow up after I get it installed.