Can someone help me design a decent crossover for this combination? Not looking for anything fancy just something that makes them sound pretty good.
tweeter: https://www.parts-express.com/GRS-PRT-8-Phenolic-Ring-Tweeter-8-Ohm-270-252
woofer: https://www.parts-express.com/Wavec...id-Woofer-with-Truncated-Frame-8-Ohm-298-1142
tweeter: https://www.parts-express.com/GRS-PRT-8-Phenolic-Ring-Tweeter-8-Ohm-270-252
woofer: https://www.parts-express.com/Wavec...id-Woofer-with-Truncated-Frame-8-Ohm-298-1142
There's plenty here that can do it, just know that Altec XO'd the tweeter @2.5 kHz/2nd and personally don't like the woofer above ~1400 Hz, so curious what the wizards come up with that's simple by my minimalist standards.
For many reasons, pre-made crossovers are unlikely to work properly and sound good: just Google the topic and you'll know why. Given the comments in post 2, a pre-made crossover has Buckley's of giving you the sound you want.
There are manufacturer measurements (i.e. frequency response and resistance graphs) for the Wavecor, but not for the GRS, which will make it rather difficult to make a 'guesstimate' on a possible crossover. To do it properly, people would need the in-box measurements for each driver.
Are there any other projects which use one or both of those drivers?
Sorry this isn't sounding helpful but we don't want to see you spend $$ and not be pleased with the outcome.
Geoff
No worries thanks for the information. I have done a bit of research into scraps over design and have tried using software to help. Do you have any recommendations on how I move on from here? I have two of each woofer and driver and an enclosure I’m looking to use. I could return the tweeters and get another pair if that could help?
What are you wanting to try at this point... tuning by ear? What about simulation or measurement?
It all comes down to how much time and patience you have as a person... and also whether you just want to build one set of speakers, or get into the hobby.
If you just want to build something nice, have little patience and time and don't see this being more than a one off, sell the drivers you have and buy a kit. If you like that experience - then going down the design your own path is the next step.
The problem with asking someone to do the design for you - is their time. I've done this before only for the OP to just not proceed (as there is no skin off their nose), so you may not get many takers here.
If you want to proceed with the drivers you have - follow the "designing without measurement" sticky thread in your forum. If you can't be bothered with that, then I recommend you follow my kit advice above.
PS: I second the "don't buy an off the shelf crossover". It is very unlikely you will hit a "pretty good" sound you'll be happy with. The biggest issue with pre-made crossovers is they assume a flat impedance often using textbook formulas and don't take into account sensitivity differences of woofer and tweeter. Youll end up with a bright / forward sound in many cases = not happy.
If you just want to build something nice, have little patience and time and don't see this being more than a one off, sell the drivers you have and buy a kit. If you like that experience - then going down the design your own path is the next step.
The problem with asking someone to do the design for you - is their time. I've done this before only for the OP to just not proceed (as there is no skin off their nose), so you may not get many takers here.
If you want to proceed with the drivers you have - follow the "designing without measurement" sticky thread in your forum. If you can't be bothered with that, then I recommend you follow my kit advice above.
PS: I second the "don't buy an off the shelf crossover". It is very unlikely you will hit a "pretty good" sound you'll be happy with. The biggest issue with pre-made crossovers is they assume a flat impedance often using textbook formulas and don't take into account sensitivity differences of woofer and tweeter. Youll end up with a bright / forward sound in many cases = not happy.
Anything really. What do you suggest? Should I return the tweeters and buy some with frequency response and resistance graphs?
To expand on Dave Bullet's recommendation to "buy a kit"... a more general recommendation of what you really need to do is build someone else's design, who has already figured out drivers that work together and created a crossover for it. A "kit" entails a small number of companies that have combined all the drivers and xo parts you need, and maybe even cabinets or at least baffles. But a pre-existing design just means you have to add all those things to your cart and make the cabinet yourself for a design that is publicly available.
If you specify your needs - room size, music you listen to, etc. then people are more than willing to point you to existing designs that meet you needs.
If you specify your needs - room size, music you listen to, etc. then people are more than willing to point you to existing designs that meet you needs.
As I posted a few times now I made my designs based on the pioneer's matching DI, so way back when I would have measured its effective dia. and assumed the dustcap = VC dia., then calc'd its mean = ~417 Hz and always starting with the pioneer's 2nd order, then ~417*2^2 = ~1668 Hz XO and would like to assume that I or one of my Bat eared female criticizers would point out any 'oddities' such as this driver's 'bump' at ~1668 Hz, so dropped it back a bit, though in my case I would have done my best to solve it acoustically via DC glue joint damping AKA $0.97 tweak.
So of course a different tweeter and/or woofer is called for as Altec was already running it too low based on how fast they switched back to a horn it replaced and shortly after the model was discontinued as too costly for its rapidly dwindling market during the '70s ever shrinking speakers, components and the cost cutting it allowed that sum totaled to a much higher profit margin over time.
I'm inclined to think you'll do well with an existing design as is being said but to answer your question, I don't use manufacturer response data unless I'm simply investigating something, so not having it wouldn't concern me.
No clue, only that way back when I would have started with the pioneer's textbook 2nd order Butterworth that dates back to at least the mid 1930s, so is probably sold pre-built by someone same as in my time.
Right, we normally would have to add a pot for shelving the HF and a by-pass cap to 'lift up' the extreme HF to 'taste' 😉 whether cone/dome or horn and in a lot of cases we just ran the woofer (often a 'FR' driver) wide range and only XO'd the tweeter.
You may not find an existing project with both your drivers, but an Internet search on the Wavecor woofer might turn up something. The caveat with looking at other projects is that you should try and find designs which are well reviewed, written up and if possible, built by several people who really like them.
For interesting and informative background and discussion on DIY speakers, dive into this Forum, Parts Express Tech Talk, Speaker Design Works, Paul Carmody's 'Undefinition' Speaker Pages and MAC/DIY just for starters; there are heaps of articles, proved designs and discussion of issues you need to consider in making or designing speakers.
HTH
Geoff