Something Silly?

[technodanvan]

While I was at IowaDIY 2025, I had a conversation with a couple of guys about the relative dearth of 'interesting' speakers present. Meaning, most boxes (mine included) were pretty standard rectangular boxes. A few had some facets, some were more square than rectangular, but IIRC, only three were really...

[JonMarsh]

I've had a few inquiries about this part- Looks like it could be useful, hope it is, but hope is not a strategy, so I ordered a matched pair to test.

...

[ehampshire]

Illuminate 7 3D Printed Speaker Build

By Eric Hampshire

All the photos

Holden got a 3D printer for Christmas and you could say I've kind of gotten into it. I have plans to build some tower speakers from wood but stumbled on these 3D printed versions, which had...

[theSven]

The journey continues for the theater with a new project to replace the subwoofers that were in use now that the new SMJ CC has been successfully launched. The sono tube subwoofer setup was my very first DIY project that I had done, and it had a grand 10 year run. Wanting a better center channel for...

[technodanvan]

We'll need the marketing guys to come up with a suitable name for this one. I'm not sure "Saint-Saëns Technodanvan Edition" rolls off the tongue any better, so we're stuck with this for now. At least it's descriptive, if one were following JonMarsh in the original thread. In any case, I have...

[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 is in...

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....