Mumbai photowalk - Banganga and Khotachi wadi

 

All imager are non sequential and standing alone.

Photowalk on 25th December, 2022.

3 designs, 3 goals

 Sound is creation of AIR. Basic physics right?

If I jumble air flow, sound will be jumbled too.

My design basis is to have cabinets (or no cabinets at all) when I need free and natural like sound reproduction.

Open baffle lets air free to flow, follow Physics. Simple, is not it?

Here I am showing three of my designs.

One, the smallest in height (the heaviest one) is a transmission line design. The lean one is a mix of Open baffle and other design principles where basics still is the Free Air Baffle and the widest and tallest one is another Open baffle with Dipole design for the bass.

All of them have one two things in common, FAB and Co-centric mid/high reproducing drivers.

Enjoy their look.

SOLD>>>>An Open Baffle Stereo Speaker Set - for sell

Here is for sell my second design Open Baffle (OB) speaker with two module design philosophy. So that one can play around different positions and arrangement based on different listening position and available space.

Basic data -
Cost 15,000 INR (ex Thane) + shipping charges
Total cabinet - Four
Approx SPL - 93 dB
Design -
Mid and high - Open baffle with Helmholtz design augmentation
Low - Ripole design

Good things about OB speakers can be found in the net easily compared to what I personally can say about it. For myself, I am now an OBdict - [URL="https://www.facebook.com/OBdict/?ref=bookmarks"]https://www.facebook.com/OBdict/?ref=bookmarks[/URL]

A small video (by mobile) of my OBs playing Vikram Ghosh and Pete are available here which will give you better perspective of the speaker and its design.
[URL="https://www.facebook.com/1689741724600319/videos/1734114773496347/"]https://www.facebook.com/1689741724600319/videos/1734114773496347/[/URL]

I am open to valid questions and queries.

I am selling this set in its Passive configuration with the crossover mounted outside the Low Frequency cabinet. So, one can easily convert it to active mode (if interested).
I am asking lower than the material cost as I want it to go. Because I want to make my next design and I need space for that.

Video of my current Open baffle speaker performing Kingdom of rhythm by Bikram Ghosh and Pete

The home video of the OB performing

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.