A 2way speaker with Peerless NE180-8 and SB26CDC/ADC

[Vineethkumar01]

I am exploring a 2/2.5 way speaker design with the Peerless NE180-8 midwoofer and an SB26ADC/CDC tweeter. It started out as a 2-way speaker design for a friend. But he has moved on to other designs. So, I am considering building it anyway and experimenting with it.

There are a few 2-way designs available on the net with this woofer, like this one: https://ampslab-spk.com/2020/12/04/rosefinch/
I really like the Satori midbass driver-like looks of this midwoofer. It also has a good enough output capability for a small room and has been praised by many on DIYudio. So why not try it out.. I have high hopes for this speaker...

The 2-way speaker has the form factor of a bookshelf speaker. Later, if this turns out well, I will try out a separate 2.5-way design that uses a pair of NE180-8 per side in a tower format.

This speaker is supposed to have a passive crossover and versions with/without custom designed waveguides for the tweeter

 

[Vineethkumar01]

Before we jump into technical details, here are the approximate cost calculations for the drivers alone for a pair of these speakers

2 x NE180-8 midwoofers will cost Rs 16000/- (https://electrocarts.in/product/peerless-by-tymphany-ne180w-08-6-1-2-fiber-cone-woofer-speaker/)
2 x SB26ADC tweeters will cost Rs 10400/- (https://audiofy.in/products/sb-acou...j3HqKBqb69nBrC1ypNVyJAsrSjGfjOrPQPndDfBgiZvJN)

So, excluding any shipping charges, the drivers will cost Rs 26,400/-.
I have these drivers in hand from a few years back.

 

[Vineethkumar01]

Here is a preliminary enclosure simulation with a closed box of 13L internal volume and a series cap of 330uF with the NE180-8

 

[Vineethkumar01]

Here are the specs of a bass reflex cabinet with 15L volume for this driver




SPL curve with inductance roll of at higher frequencies modeled as per VituixCAD