Preface
I started this article with the intention of offering a guide to DIYers, mostly those new to the field, that defines and explains the terminology you often see in discussions on the topic of DIY loudspeakers. Now, I have plenty of learning to do myself, and am under no illusion that what I do know is complete and correct. Because of this, I want these articles to be living documents. By that I mean, I'd like the DIY community to offer input on each definition to expand and clarify...
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Exploring Common DIY Terminology (work in progress)
- Created by: technodanvan
- Published: 31 July 2023, 16:01 Monday
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- 1 comment
in TerminologyExploring Common DIY Terminology (work in progress)
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3D Printed Speaker Cabinet, Can we do better?
A coworker of mine found out I like speakers, and partake in the forum đ. He shared a link with me that got me thinking can we do better with the designs shared on this site with the DIY community? My thought is yes, and this also would be fun to use the 3D printer for something other than printing...👍 1- Bottom
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Baffle Thickness
Hello all. Been a while since I posted here as I haven't had any builds lately. I finally got back into the groove and am currently working on a pair of Zaph ZRT sealed bookshelves. I've got the boxes built and hope to veneer this weekend. For the baffle I am thinking about using some Paperstone...- Bottom
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Eight inch woofer testing, report
Hello Everyone,
I am looking to build a speaker with an 8" woofer and a 4" tweeter in 1.5 cubic feet or less. These are the constraints, please don't make suggestions on what to try outside these guidelines.
Because I do not know which are the best drivers to choose,...👍 3- Bottom
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Docero (again)
I built some Docero towers a while back, and while I was pleased with the result, I don't have room for them any more. After considering my options, I decided to pull the components and build a bookshelf set of Doceros.
The drivers were not going to come out easily, but after a bit of...👍 1- Bottom
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A subwoofer journey...(CSS SDX12 + 3x APR12 Passive Radiators)
As far as build stories go, this one will probably not yield much fruit for a little bit. That said, I have some questions for the community regarding subwoofer design before making any further purchases. I already have 4x Dayton UM15-22 subwoofers expected this Saturday for another application...I'm...- Bottom
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Minimum Phase and Accurate Crossover Simulation
- Created by: Reet
- Published: 26 December 2022, 15:27 Monday
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- 0 comments
Minimum Phase and Accurate Crossover Simulation
Minimum phase for a speaker can be described of the phase of the frequency response of the speaker at itâs acoustic centre, or the phase without any excess phase or âtime of flightâ included. It can be calculated from the speakerâs 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...Last edited by Reet; 29 December 2022, 15:11 Thursday. -
How To: VituixCAD Extended Impedance Model For Any Driver
- Created by: Reet
- Published: 26 December 2022, 15:07 Monday
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- 0 comments
How To: VituixCAD Extended Impedance Model For Any Driver
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 âsemi-inductanceâ model can provide additional characterization of the impedance curve for greater accuracy.
Many Scan-Speak drivers include this data in the âadvanced parametersâ section of their datasheets, however the...Last edited by Reet; 29 December 2022, 15:12 Thursday. -
How To: Measuring impedance and T/S with ARTA/LIMP
- Created by: Reet
- Published: 26 December 2022, 15:02 Monday
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- 0 comments
How To: Measuring impedance and T/S with ARTA/LIMP
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
âMeasurement Jig â
This instruction is following what...Last edited by Reet; 29 December 2022, 15:12 Thursday. -
How To: Mirror EQ with VituixCAD
- Created by: Reet
- Published: 26 December 2022, 13:26 Monday
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- 0 comments
How To: Mirror EQ with VituixCAD
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.
âVituixCAD Process
Connect each driver and EQ blocks in the crossover section as shown. Ensure that the active peak/notch filters are âshortedâ so that only the G(f) block is directly connected to the driver. Three PEQ blocks are show,...Last edited by Reet; 29 December 2022, 15:12 Thursday. -
How To: Filter Simulation with VituixCAD and EQ APO
- Created by: Reet
- Published: 26 December 2022, 12:55 Monday
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- 0 comments
How To: Filter Simulation with VituixCAD and EQ APO
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...Last edited by Reet; 29 December 2022, 15:13 Thursday. -
Dual Channel Measurement Jig
- Created by: Reet
- Published: 26 December 2022, 12:49 Monday
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- 0 comments
Dual Channel Measurement Jig
Here's a schematic for a simple dual channel measurement jig, which can be used with ARTA, REW, or SoundEasy. This jig is made with USB audio interfaces in mind, so the use of 1/4" TRS connectors is recommended for this purpose. Main reason is that the 48V phantom power on audio interfaces is only present on the XLR pins, so use of TRS will ensure that 48V will only ever be present when a mic is connected, not when using this jig even if you leave phantom power turned on.
R1 should...Last edited by Reet; 02 March 2024, 22:27 Saturday. -
Single vs Dual Channel Measurements, or why friends donât let friend use USB mics
- Created by: Reet
- Published: 26 December 2022, 12:23 Monday
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- 0 comments
Single vs Dual Channel Measurements, or why friends donât let friend use USB mics
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....Last edited by Reet; 26 December 2022, 14:49 Monday. -
How To: Export Impulse Response from REW for use in VituixCAD (prior to 2.0.98.6)
- Created by: Reet
- Published: 25 December 2022, 18:11 Sunday
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- 5 comments
How To: Export Impulse Response from REW for use in VituixCAD (prior to 2.0.98.6)
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...Last edited by Reet; 14 January 2023, 17:06 Saturday. -
DK - Isiris (V2) - Build
Hi All,
I figured I've made enough progress that I can start to share build pictures. I've made a ton of cosmetic mistakes so far - but I've learned not to go out the way to point them out (lol).
It's been a challenge so far. Some comments for others that may consider this...👍 3- Bottom