Condor mods for 1x12 response?

[thehallofshields]

Has anyone else out there wanted to build a Condor, but needed to simulate a 1x12 rather than a 4x10?

I'm rolling my own 'tweed style' DI box would really like to be able to get a response curve similar to the Jensen P12Q speaker, which is a popular upgrade /  pairing with the E53 / '57 Tweed Deluxe circuit.
Since the starting point of the Condor was the Jensen P10R, swapping out some Condor values to get a response closer to a 1x12 is probably plenty close for DIY.

[antonis]

Has anyone else out there wanted to build a Condor, but needed to simulate a 1x12 rather than a 4x10?

NO..!!!

[thehallofshields]

[thehallofshields]

The Condor seems like an ideal platform for getting the general curve of other speaker / cab configurations too.

It's just Gain Stage -> Mid-Scoop -> HPF -> LPF -> LPF. Right?

[Rob Strand]

It's just Gain Stage -> Mid-Scoop -> HPF -> LPF -> LPF. Right?

Yes.

Check out the cab sim in the Marshall JMP-1 preamp follows a similar-ish pattern.
The JMP-1 supposed to be for a 12" but IIRC.  The condor is voiced quite dark,
probably darker than a lot of the 12" filters.

The LPFs are repeated in the Condor but many other sims use different LPFs.

At the end of the day, if you start with a sim and it's too dark play around by decreasing the one or more of the LPF caps.

[thehallofshields]

Jensen published the frequency response of the speaker (link in the first post).

How do you take that then account for the cabinet?

[Ripthorn]

Jensen published the frequency response of the speaker (link in the first post).

How do you take that then account for the cabinet?

This is a subject that has resulted in countless academic papers, research projects, etc. It is not a simple task, but doable. If you can find the Thiele-Small parameters for the speaker and parameters for the cab, there are speaker building tools that will give you the combined response.

[Rob Strand]

Jensen published the frequency response of the speaker (link in the first post).

How do you take that then account for the cabinet?

It all seems likes a good idea at first but then the complexities of the acoustics takes over.     This is something I've poked around with a lot and from many angles.   

If you approach it from only the Thiele-Small perspective it misses a good deal of what is going on.   The enclosure shape and the mic, mic position, mic angle all affect the balance between the bass and the upper mids.   You can also tweak the highs.    if you stand in front of a speaker and listen, then move around the room so you are listening off-axis sound there can a big difference in the highs.

The funny thing is the bass-end of most "good" sims end-up hovering around the same region.   Totally regardless of what they claim to emulate.
https://www.diystompboxes.com/smfforum/index.php?topic=106185.msg1123794#msg1123794

Some of the sims the metal guys design put out a lot more bass and raise the cut-off at the high-frequency end.

There's also the problem that the set-up determines what is required to match a sound,
https://www.diystompboxes.com/smfforum/index.php?topic=106185.msg1123793#msg1123793

The 4x12" cabs throw in a whole other layer of acoustic problems since you are listening to multiple drivers at different distances and different angles.

If you want to match an existing speaker, it's best to start with something close then start tweaking the highs and lows with the low-and high-pass filters.