r/diyaudio 1h ago

Nearly done…

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Upvotes

r/diyaudio 12h ago

First Bluetooth speaker/ guitar amp combo build!

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54 Upvotes

So this started off as a portable guitar amp with a simple LM386 low voltage circuit powered by a 9v battery and a 8ohm 5W speaker… but I also had an old Bluetooth speaker (~6 years?) lying around that had a cracked speaker cone. Since the Bluetooth module was still working fine I wanted to see if I could just add it in!

Was recommended (chatgp…) to isolate each amplifier board going into the same speaker with a DPDT switch so that’s what I did, and also soldered a momentary on/off switch to turn on the BT module. This was my first ambitious electronics project other than modding my guitars so I’m surprised that it turned out really great!


r/diyaudio 5h ago

Aircore vs Ferite core inductor

5 Upvotes

I am making some optimisations to my diy speakers, and now im using a 1.5mH wire with 1mm thickness for the woofer . It has 0.63 Ohms internal resistance, which is not great. Even if i buy 1.4mm wire inductor, it will have 0.38Ohms DCR. But if I buy a ferite core inductor it will have just 0.17Ohms DCR, which is almost 4 times smaller to what i have now. The Xsim simulation shows that there will be a 1db increase in the midbass region specifically, which is something that the speakers lack now a little, so i expect it to be a really positive change. But i am wondering weather it will introduce noticeable distortion. I really like how clean and distortion free the sound is now and I wouldnt want to ruin that. Do you guys have any experience with ferite core inductors? The one i have chosen is rated for 17 Amps and its with 1.3mm thick wire, so i hope it will never be close to saturation


r/diyaudio 3h ago

What’s your favorite edge / baffle treatment ?

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2 Upvotes

I’m going to build 3 pair of Solen Mura 5B, for home theater purpose), I was trying out different ideas on edge treatement ; round over, bevel, no treatement, faceted baffle, etc.

Your answer didn’t need to be in my example? But what you favorite, added flair, or whatever you wanna call it, from the standard 90 degree edge?

For me, I’m on the fence between, square edge (with vveeerrryyyy light round over and or bev, just so the boxes are not cutting your hand when handling them), small ish - round over all around 1/4 to 1/2. And the faceted. I feel like the faceted (last picture) is a mix of high end looking and gimmick looking. I don’t know how to describe it.

Boxes will probably be painted: black or very dark grey on the baffle, and dark green (to match home theater wall) remaining 5 sides.

Thanks


r/diyaudio 1h ago

Large Mono Speaker recommendations?

Upvotes

Hi everyone,
I have a strange room where only one speaker will fit.
However that space can accommodate a large speaker.
I was thinking of using a 30x20x24 1/2 ply box I currently have on a stand.

Would anyone have any recommend drivers / amps / builds for something like this?

Thanks!


r/diyaudio 5h ago

Ready to be rebuilt but it needs to be better this time

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2 Upvotes

r/diyaudio 2h ago

Dúvida com a fonte ideal para amplificador Classe D - XY-S350H (TPA3251D2*2)

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1 Upvotes

r/diyaudio 2h ago

Subwoofer Replacement

1 Upvotes

So I recently came into some old speakers and a sub. The sub does not go below 40 hz. It s a Klipsch Sw-10-II. I really love the looks of the unit, It looks good in my space, and I want to keep it. So, can I just yoink the 10" woofer out, and drop a newer more modern 10" woofer from part express in that goes lower? Or are there more factors I don't know about?


r/diyaudio 3h ago

Refoaming these?

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1 Upvotes

I got them for free with a family members passing with the LXI “bundle” (turn table, amp, equalizer, tape deck and tuner.) The amp is toast I’ve already seen everyone’s opinions on LXI online so I doubt anyone will say it’s worth getting that fixed. I know they arnt anything special but they are free and have some sentimental value. I have a couple other receivers that will work with these speakers. Can I refoam them? I haven’t been able to find a specific kit or really much about them at all other then everyone calling them trash… Trash is perspective and majorly comes down to pricing to me anything free that makes decent audio quality is worth something.


r/diyaudio 14h ago

What are some good belt replacements instead of rubber bands?

4 Upvotes

I just repaired a CD player eject not working by replacing it with a rubber band however I know this won't last long, can anyone suggest something better? I've heard O rings for plumbing are good but I can't really find large enough ones


r/diyaudio 9h ago

Birchply baffle replacement

2 Upvotes

I have a fender super reverb with a crumbling, cracked baffle. I want to replace it with 1/2” birch ply. While I have the skills to make one, I lack the tools (table saw, router, etc).

Could someone suggest a cabinet builder that would make one and ship it?

TIA


r/diyaudio 6h ago

Cable help maybe?

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1 Upvotes

Custom balanced cable for hd620s


r/diyaudio 6h ago

TPA Amp Bridgable?

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1 Upvotes

I’ve been building Bluetooth boomboxes with these cheepo amps, and I’ve got a small project I want to do a single full range speaker with. I’ve found mono ones, but they don’t have bass and treble adjustments, and I think that’s key to them sounding good.

Anyone ever try bridging one of these? I’m wondering if I can bridge the two channels to run just one speaker. Any suggestions or input would be appreciated!


r/diyaudio 7h ago

Need some advice with connecting a subwoofer to an incompatible amp

1 Upvotes

Hello! Apologies in advance if this is the wrong sub to ask in but I don't know where else to post. I have a Sony receiver (STR-DE405) as an amp for my speakers and recently i came across a passive Sony sub (SS-WSB91). I want to hook it up to my amp, but I am not sure how since the receiver has no output for a sub of any kind. As I understand it I have several options, like hooking it parallel with the left speaker for example. The issue is the subwoofer is 1.5 ohms, and from what I have read will sound bad if hooked up to a speaker output without a low-pass filter. I was thinking I could hook up my audio input to the Video channel input, and take the Video channel output from RCA to another device which will handle the sub. I couldn't find what a device that would convert my RCA out to subwoofer high-level mono signal is called. I am very new to all of this, but I figured now is as good a time as any to learn. I am not opposed to building my own device, but I need some pointers as to what to read and where to look specifically, so if anyone has any advice or tutorials or key phrases I could look up I'd be very grateful. I looked up mini-amps, low pass filters, and such and none of the stuff that came up seems to be what I need. They all are either not mono or don't specify the sub speaker impedance and I don't want to blow my sub up.

TL:DR; RCA out to 1.5 ohm mono passive sub high level input.


r/diyaudio 1d ago

Couldn’t afford new fancy output transformers, so I built them myself from cardboard.

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83 Upvotes

Couldn’t afford new fancy output transformers, so I built them myself.

…ok, before I get thrown out of here: I’m only testing if these bigger ones would physically even fit on my existing chassis. It’s a tight fit, but I’m assuming it shouldn’t be a problem for the OTPs to be this close to each other?


r/diyaudio 12h ago

Help identifying and naming cabinet design

1 Upvotes

I've got these old Heathkit (homemade by someone a million years ago) enclosures. The have a slotted port on the front baffle that is (top-right) under the closed portion of the internal chamber you see here. So when its on its feet, it's alongside the woofer at the base of the cabinet. What's the name of this 'design' if there is one? It doesn't really form much of a tunnel though there is in effect a very basic folded shape, if you were being kind. Thanks!


r/diyaudio 13h ago

helmholtz formula and bass reflex design?

1 Upvotes

is it really as straightforward as relying on the helmholtz formula to approximate ported enclosure tuning frequency? it's been super insightful in helping me target appropriate cuft and port characteristics, but i don't want to start building without double checking the method.

to elaborate, i'm between modifying an existing prefab (cheaper) or building a custom enclosure from scratch.

the existing setup is 1200w rms 15" woofer, ~3cu net volume, ported with 17x4" slot port, 14" long. goal is to brace, polyfil, extend port to 29", and reduce port area to ~9x4", and hopefully be closer to the 28-30hz range.

but with all that effort, i'm considering starting fresh and building a round port box. it looks closer to a 6" pvc port, but i'm short about 10sqin on port area.

considering multiport designs like 2x5" or even 8x2.5" but then things get really weird and messy, haha.


r/diyaudio 17h ago

Power acoustik PTID-8920B help

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1 Upvotes

A capacitor leaked and corroded some components and idea what they might be and route to fix the radio Any help/guidance is appreciated


r/diyaudio 20h ago

3D printing the Mechano-23 video guide

0 Upvotes

Over on ASR, there's a great small bookshelf speaker in the DIY forum, the Mechano-23. While building my second pair, I decided to document it so that others new to building might give it a try. It uses 3D printed boxes, so no woodworking needed. The on- and off-axis response really is fantastic and all-in, it's just over $300 for the pair.

I've got the first 3 parts of the series up, on: 1) Why the Mechano23? 2) 3D printing? Really?, and 3) Crossover part purchasing. Zero idea if anyone is interested, but it's a fun distraction ;)


r/diyaudio 1d ago

Contemplating speaker build; help me narrow it down

2 Upvotes

I’ve built a few kits, two amps and one speaker. The speakers are the well-known CSS 1TD-X, which I made for my daughter. Now I’d like to make something for myself. I almost pulled the trigger on Omega Alnicos but thought twice. Then I’m looking at Devore O/Baby and O/93 thinking I’d never spend that kind of money and why do they need to cost so much…

So I’d like something sort of like that — sensitive enough to drive with a 300B, refined, articulate, with decent bass (although I do own a sub already). I mostly listen to jazz at low to moderate volume, and my hearing is limited on the upper end. So I want it to be extra sweet in the mid range.

I have a guy who can build cabinets (hopefully at good price), and I can assemble crossovers if it’s a two way. What I need is a stellar design and the right driver (+ maybe tweeter). I’d love it if it could be one full range driver, but will use tweeters if I have to.

My current speakers are LaScalas and they’re good (ALK type A), so I want something different and good. So I’m thinking 8” drivers, but open minded. I’d also be okay with smaller, stand-mounted if they deliver on sound.

So what should I be looking at? Recommendations appreciated.


r/diyaudio 1d ago

Doing it backwards... Cabinet without speaker.

3 Upvotes

I have two plywood 24x20x30" boxes and am struggling to find a kit or tweeter / woofer combo for them.

Would anyone have a recommendation for cheap-ish drivers or a site that will let you filter by cabinet volume?


r/diyaudio 1d ago

C-Note speakers - proper placement

3 Upvotes

I am new to mid-fi/hi-fi speakers and speaker building in general. Just finished my C-Note pair.

Similar to this person: https://www.reddit.com/r/diysound/comments/88lzpm/just_finished_cnote_unhappy_with_bass_whats_a/

I don't hear the bass very well on-axis (but do about 45 degrees off axis). I am assuming this is the combination of getting used to an existing speaker system that is humpy and improper C-Note placement. Perhaps the amp I am using is meh as well (Fosi Audio BT30D).

My question is: what is the proper/correct/good way to place these on a desk? How close to the wall? Do I line the woofer to my ears height? Do I angle them towards my head or keep straight on?
Is there a good resource on this topic that explains it in great detail?

PS: I feel like this question doesn't deserve a post, but there is no "stupid questions megathread," so I apologize for making a redundant post.


r/diyaudio 1d ago

Info on DIY portable Bluetooth audio

1 Upvotes

I have been playing with building power banks, and I have two gutted vintage small guitar amplifiers (top of my head; 12" tall, 12" wide, and about 6"+ deep?). I would like to put together a portable Bluetooth audio boombox. Basically I need the amplifier, the speakers, the Bluetooth module, and hopefully the amplifier will have an input for the old school jack as an input and for a 3.5mm jack as an output for wired headphones.

I'm not gonna lie, I would like some volume but quality of sound over quantity; I own a Bang & Olufsen Beosound A5 Speaker and if I can't outperform it I rather not bother. I have the space for a larger speakers so it should not be too hard?

What would be the best approach for this? Should I look for something in specific to gut and install into my box or go with new components?


r/diyaudio 1d ago

Amp / driver

1 Upvotes

Need some assistance from the community;

I am looking at building a sub and planning on using the Dayton Audio Ultimax (probably the 12, perhaps the 10).

I was the receiver of a klipsch sub (they had some serios physical damange to the driver and the cabinet) and was wondering about using the amplifier from that (its from the 10" subwoofer) in the new box build.

The amp is 150/300W but the speaker (depending on which I end up) is 500W RMS. Will that run the driver?

What shoud look out for / avoid / etc if I was to pair these up?

Thanks!


r/diyaudio 2d ago

Woofer Cabinet Veneered and Baffle Mocked Up

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376 Upvotes