Compact transmission line speakers

Life wants more, so things need to be compact in a limited space.
I wanted to make a compact speaker with enough bass but distinct mid. My importance is in life like mid. One of my friend Hari introduced a Peerless driver which has almost flat mid frequency reproduction capability in a tiny 3 inch cone, 3.5 inch driver.

I conceptualize a two fold compact pipe based speaker design that can have a line length of 28 inch yet actual height of just 14 inch. It still has driver space of 5 inch too.

A demo version made out of PVC pipe, thermocol and card board proves my design will work.

I then used 6mm mdf board for my required pieces, cut them from a wood molding shop.

I cut the PVC pipe by self. I secured those mdf plates with mseal. Later, I came to know that one can use a quick adhesive called Vetra as a most effective sealant and adhesive.

Here are some photos of those two speakers. The box you see in front of them is actually an active cross over, but this is used to show how a compact amplifier with UB and FM connection can look like.

I will add a drawing of internal later. that will explain how this can easily be made at home.


Here is a link to a small video of it playing songs of Papon from his album "the journey so far"

Compact transmission line FR speaker by sumanta

Happy listening.

My tone arm trial - Magnetic and uni pivot type

Al of a sudden making tone arm of own make sense to me.
Then, I thought I can use two different cartridges on the same platter. Two different cartridges ased on their cost, quality (poor) of discs. I will b quick. and ofcourse it will be fun o DIY.

Uni pivot was the easiest to try so it was already a choice and I already had a good example of one of my audio friend.
While thinking about it, I realized friction is the problem, then naturally I thought of using magnet to avoid a contact yet get the strength of a connection through magnetic force.

in that time i discovered somebody has already thought about it and made a very good design on it with a patent too. He is Schroeder. Read DIY forum where people tried clone his idea and made their own tone arm.

I wanted both my tone arms to b made from easily available item. and also I tried to make use of similiar items for both designs.

Here are photos of them. I have used

1) wood bit for tone arm
2) cycle tube part like nozzle and holder for the shaft of uni pivot and top wire holder of magnetic pull uni pivot (Schroeder) design.

 

My Cabasse speakers for sale - space and money for next diy speakers

I am going to sale my Cabasse Jersey 222 floor standing speaker pair.

happy listening.

A new design - OB and Ripole sub

I am trying to make a value for money speaker set up with Ripole sub and open baffle (OB) speaker.

It is in the making.
Attached are some photos of first assembly. It is about to get paint now.
Drivers will be mounted post painting.

And here is the finshed version. Gaps are filled in. 

Balanced works are leg supports, and grilled speaker cover for the top.

Another piped driver speaker design.

I did my 3rd speaker design last Saturday. It is of Piping composition concept only, but this time acoustic behavior was similar to Pluto but drivers were completely different. Drivers were passive crossed over too with a simple capacitor (as it came with a Panasonic DVD player's speakers).

Because of the damping inside pipe and 180 degree horizontal sound wave direction and placing the speaker at least 3 feet away from both front and side wall, imaging was wonderful, sound clear, true to its content.
I compared it with my Tube and Cabasse set where the former one came out clearer. It does not have the heavy weight bass Cabasse brings out. It rather brings out distinct flavours, timbre sounds of individual instruments.

I believe I need to pack it more, and will be sealing it once they are properly packed. I need to steel base plates too, present baseplate is not heavy enough. It needs to be wide too.

I am happy listening it. I do not or intend to use instruments to measure sounds coming out of it as I will be listening it. My measurements are by my ear and other speakers only. These speakers are mostly made for my understanding of sound and pleasure of music only. I although feel these design is simple, effective, compact, can accommodate various drivers and can be played in rooms of various shapes and sizes. We only need to keep them 3 feet away from front and side walls while listening sound through it.

Here are some photos.

Piped driver, a 3 inch full ranger from a surround cabinet

Actually it is not a day effort if you consider mental calculations, reading, assembly processes that went through my mind, ut otherwise, it got finished in one day.
On last to last Saturday I supplied food to my gear acquisition syndrome, bought a used Panasonic 5 DVD player with 4 speaker set because I liked looks of the drivers there in.
Last Saturday I opened those surround speakers. Tried to fit them on PVC pipes.
It seemed working by physical and dimensional similarities. Gaps and mismatches seemed manageable.
Then I took one of the driver to a hardware shop, and found out that an elbow actually is holding the driver nicely. 
Bought two of those elbows and two pipe piece.
Then I took some plywood plates to a nearby wood shaping shop to get required holes in them. 
Later I placed those drivers on the elobow with MSeal.

And ran earthing wires to connect. I put some synthetic cottons inside and mass loaded them at the end too.
Here is the result.

Here is the latest version with increase in line length for more lower bass augmentation.

Sound to become music in a speaker

Have you listened songs impromptu in your drawing room? You must had or regularly have. Do you realize that those music sounds richer in base if the room is less absorptive.

The same wayit is not bad to have reflective sounds off your drivers/speakers. At the same time they should loose harmony, they shuld not colour the original sound but just add the warmth and or change depth of the music.

Open baffle speakers are simply open sound producing machine, almost like us and like any other music instrument. Place them at least 1m away from walls, they will give you open live musical sounds.

Let those drivers in your speaker box breath. Open the back end of your cabinet speaker, listen to it.
You will be amazed.