Definitive Technology BP20 Mod Thread

Would you happen to know the values of these two capacitors in the BP10? I assume they are for the LF. Is it possible to replace them with a single capacitor of their combined values...or is it more complex than that?

Okay gotcha. Thanks again!

Are they in the same circuit, or two different circuits? I suspect doing your idea will break the gear, but what the heck.

Can you post a photo of the bottom of the crossover showing the circuit board traces?

Good, now by looking alternately on the top and bottom of the board mark the four solder points of the two capacitors.

You need to use an ohm meter to see if they are the same circuit, or different circuits.

I keep waiting to see the OP disliked DefTech speakers so much he got divorced just to get new in-laws with different speaker preference.

I don't think I'll ever get rid of my BP30's. I'm old, so redoing the cross-over isn't needed for me.

I really like their sound as is, being hooked up to my Onkyo tx-ds898 receiver. I've never heard them hooked up to anything else except to a Yamaha receiver for a few seconds when I bought them. I did have them hooked up while the receiver had the "sub on" engaged. That limited the bass that was going to them. About a year ago or more, we had a power outage from a Hurricane for 3 days. Afterward, I had to reprogram the settings and found the sub setting. After turning the sub-out off, the bass really came out bigtime.

I sold a set of Polk SDA 1C's not ever hearing their true bass output because of this receiver's sub setting being in the "on" position. I didn't know what I had.

The BP30s in the picture below "were" cramped, now they're not.
I turn them on every time I step into my cottage.
I'll bring them out into the room more when I make more space.

I forget what was playing but I liked it.

Tony M wrote: »

I don't think I'll ever get rid of my BP30's. I'm old, so redoing the cross-over isn't needed for me.

I really like their sound as is, being hooked up to my Onkyo tx-ds898 receiver. I've never heard them hooked up to anything else except to a Yamaha receiver for a few seconds when I bought them. I did have them hooked up while the receiver had the "sub on" engaged. That limited the bass that was going to them. About a year ago or more, we had a power outage from a Hurricane for 3 days. Afterward, I had to reprogram the settings and found the sub setting. After turning the sub-out off, the bass really came out bigtime.

I sold a set of Polk SDA 1C's not ever hearing their true bass output because of this receiver's sub setting being in the "on" position. I didn't know what I had.

The BP30s in the picture below "were" cramped, now they're not.
I turn them on every time I step into my cottage.
I'll bring them out into the room more when I make more space.

I forget what was playing but I liked it.

Yeah, I hear this alot about the BP30's. Most owners I come across feel the same as you. like..nope ain't letting these go. Maybe that's why I don't find many for sale often. During the time I was really searching for them..they'd pop up usually not in my area and the seller wouldn't ship them.

The monitor40 and 60 series ii were what I consider to be my first real speakers. Had no idea that a system could sound the way these did in my place. But I always wanted to try Definitive's speakers. I read alot about them..many reviews of praise while others the opposite or indifferent. I started my Definitive experience with the BP6B'S and imo they were astounding for their size and price. From there I moved to the original BP10's as the Polks made me really like soft dome tweeters.

Interviews from a few speaker designers also inspired my component upgrade. Sandy Gross (Definitive Technology
founder) himself being one of them. He spoke of how companies design products at a particular price point. In his case always seeking to balance value and performance to sort of make high end more accessible as he would say.

The BP10's being no different were designed at a certain price point. Though sounding good were also had me assessing where the compromises were made. Usually between three areas. The drivers, the crossover components or the cabinets. I would argue that the drivers and cabinets in the BP series are places where the least compromises were made. While the crossovers though sufficient for function are considerably cheaper. From which I reasoned, that higher grade parts would get them closer to how they might sound if the price point were just a little higher.

That said, I do not really consider what I've done to be a real mod or redo. I have simply used higher quality parts of the same values. The crossover design is still basically the same. Oddly enough the overall sound character of the speakers is maintained only making them clearer versions of themselves. I quite enjoy their sound and even before the upgrade I had not experienced some of the more negative things that have been said about bipole speakers. Based on the bad comments..I was expecting the speakers to sound horrible. Like the equivalent of smeared paint on a canvas. But I wanted to see for myself. On the contrary I was/am very impressed by both the sound and the simple clean look that can easily pass for a speaker that was made a few years ago and not 1990.