Saint-Saëns planar- AKA SMJ-40- time for a project now?

[JonMarsh]

This project concept has an unusual history and evolution. It started out in early mid 2021 based on the idea of a short narrow column bass system, originally targeting the recently introduced Dayton E180HD-44.






This dual magnet long excursion driver seemed...

[deewan]

Greetings all. I've been out of the DIY speaker kit scene for a bit. My last build was a Statement II custom cabinet build 8 years ago. I recently sold my home and the new owners wanted to purchase all my theater gear and DIY speakers. I find myself with nothing more than a Sonos ARC and Sonos sub to...

[Evil Twin]

This is a new "Evil Design Study" in the old tradition, which will soon be converted to an active project as components ordered begin to arrive...

The premise is quite simple, based on a few objectives which have been prioritized:

• Extended LF performance with low distortio

...

[DaveFred]

Hello,

I am a little late in starting on my InDIYana 2023 build, I spent quite a bit of time testing drivers to see which ones would work best for what I wanted to do. For those who do not know, the Midwest Audio Club has an annual get together in Fort Wayne Indiana in April where one...

Minimum phase for a speaker can be described of the phase of the frequency response of the speaker at it’s acoustic centre, or the phase without any excess phase or “time of flight” included. It can be calculated from the speaker’s frequency response using Hilbert-bode transform, or HBT. When comparing multiple minimum phase responses, we can say that the responses occur at the same point in space, ie. there is no physical distance between them. When measuring speakers and processing the...

Loudspeaker T/S often includes only a single Le value for inductance, however driver motors are usually much more complex than a single coil of wire, so Le on its own is not a very good description of the driver characteristics. An extended impedance model, or “semi-inductance” model can provide additional characterization of the impedance curve for greater accuracy.

Many Scan-Speak drivers include this data in the “advanced parameters” section of their datasheets, however the...

With a simple jig, loudspeaker impedance and T/S parameters can be easily measured with LIMP. The same jig may also be used to measure component value for resistors, capacitors, and inductors, as well as measure transfer functions of passive and active filters.

The setup is quite simple, the following diagram is taken from the LIMP manual:
https://artalabs.hr/download/LIMP-user-manual.pdf

Measurement Jig

This instruction is following what...

With VituixCAD, we have the ability to provide a mirror EQ function, that can then be passed to APO EQ for active processing. This allows for a speaker's frequency response to be fully compensated for without requiring many bands of parametric EQ.

VituixCAD Process

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Connect each driver and EQ blocks in the crossover section as shown. Ensure that the active peak/notch filters are “shorted” so that only the G(f) block is directly connected to the driver. Three PEQ blocks are show,...

With meticulous passive filter design, it may be beneficial to hear the result before spending money on crossover parts and putting in the time to assemble the crossover. Fortunately, with VituixCAD and EQ APO and filter can be simulated digitally. This process can simulate multiple drivers simultaneously, one driver for each output on a soundcard, for example a 7.1 soundcard could simulate a stereo 3 way system utilizing 6 channels.

Note that an emulated passive filter will reproduce...

What does single channel or dual channel measurement really mean, and what are the implications of choosing one over the other? This document aims to help answer this.
Strictly speaking, a microphone is a single channel of audio input, in that it is a mono signal. USB microphones which include integrated ADC and USB codec can be considered a single channel device.

Dual channel would be a measurement which includes a second channel of signal input in addition to the microphone....

Update: Since VituixCAD 2.0.98.6, exporting IR using windowing as described here is no longer required. the impulse response can be exported directly, make sure to uncheck "normalize" on export. VituixCAD will automatically set "skip samples" to 1m (2.907ms) prior to the start time of the exported impulse response to maintain correct timing on import.

REW can export the measured impulse response directly as MLSSA formatted text file, which can be used within the...

[lcolbur1]

Hi all, I'm probably jumping the gun sharing this project now, as it's a long-term work-in-progress, but I anticipate finishing this summer and couldn't wait to post.

BLUF: I'm building a pair of curved Nat P's. Actually, more like complex-curved, as the top/back is curved and intersects...

[MarkR]

Hi Folks,

I have had most of the parts both towers and centre channel speakers for far too long and am finally getting around to making sawdust.
The Towers are 3.5way and centre 3 way.
My problem is I left buying some of the inductors until last, the towers use an 3.6mH Erse...

[DocT]

Hey guys.

It's been about 4-5 years since I built my Statement II speakers. They've been excellent, though my craftsmanship has developed, and I'd like to rebuild them in a slightly more aesthetically pleasing manner.

I attached a couple of photos of my CAD drawings. I've...

[technodanvan]

Jon's 'Obi-Wan' project got me thinking about a few kits I have lying around, including one that is somewhat similar in that it is an 8" two-way. I'm talking of course, of Ben's (Wolf's) Zingers design. I purchased this at least a year or two ago from Meniscus since it was relatively low cost and...