Some photos of my 4345 clones

[JeffW]

Yeah, where did you get the little enclosure for the crossover?

[boputnam]

The crossover is done!

It is a noticeable upgrade from the m552. Midbass is more defined, bass and drums are sharper and clearer. Also there seems to be a bit more resolution in the highs.

Excellent. And, your observation is consistent with my urging, although that included you consider a Bryston 10B L-R. I never contemplated you'd build your own! But that's all you, Joe!

It went together pretty much as planned. I messed up the gain structure, and I'm stuck with +6dB gain - I can fix it, but I'll have to order more parts.

I'm curious about the error...

Also there was a defect in one of the PCB's copper layers, causing a short between traces. It was frustrating to track down - next time I need to inspect the boards more thoroughly before assembly.

How'd you find it with everything still soldered to the PCB's? Compared one to the other...?

So what's next? The discrete op-amp, power amps, or maybe back to the wood shop for a matching birch rack / tv table.

Smaart...?

[just4kinks]

Your work looks very nice - small, modular and straight-forward.
Nice cabinet too!

Thanks!

Yeah, where did you get the little enclosure for the crossover?

http://www.par-metal.com/

Their enclosures are really nice! Thick anodized front face, variety of sizes, and good prices.

I'm curious about the error...

Basically, the balanced output buffer is doubling the amplitude of the signal. At some point I had realized it would be a problem, but I forgot to correct for it until it was too late.

How'd you find it with everything still soldered to the PCB's? Compared one to the other...?

Luckily the short was on the bottom! It still took a while to find, at first I thought it was a faulty component and I clipped a bunch of them out.

Smaart...?

Yes! I have some ideas I want to run by you, when the time comes.

[Amnes]

Lemme guess: 100nf + 3.92k? What a gem. When I grow up I want to be just as talented knowledgeable and resourcefull as just4kinks. Fabbing up proper quality products on your own is a great way of life. I'm holding my breath till you fire up the discrete balanced crossover. I'm sure it'll be a work of art. I'll hopefully be firing my 24db@340Hz single ended opamp crossover tomorrow - really similar desing to what you fabbed up. Hopefully it too will work some magic in the overall feel of my clones.

[just4kinks]

Lemme guess: 100nf + 3.92k?

exactly! With 1% metal film resistors, and 1% mkp1837 (polypropylene metallized film) caps.

What a gem. When I grow up I want to be just as talented knowledgeable and resourcefull as just4kinks. Fabbing up proper quality products on your own is a great way of life. I'm holding my breath till you fire up the discrete balanced crossover. I'm sure it'll be a work of art.

It's not talent and resource, it's just excessive free time! Besides, you have already proven your skills with your own beautiful clone project.

I'll hopefully be firing my 24db@340Hz single ended opamp crossover tomorrow - really similar desing to what you fabbed up. Hopefully it too will work some magic in the overall feel of my clones.

post some pics! I want to see your handiwork.

[Amnes]

My clone project required me nearly only to solder the passive crossover and screw in the drivers - not too much work at all. Carpentry is an art, ordering cabs is not.