Zaph Audio SB12.3 Build Thread - diyAudio
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View Poll Results: Would you build the SB 12.3 if you were to build a large 3 way speaker?
Yes If I had the space,money and time I would. 4 50.00%
Yes If I could make the cabinet smaller or less ugly. 1 12.50%
No There are better value 3 way designs that can be made with similar quality. 3 37.50%
No For me DIY is design from scratch. 0 0%
Multiple Choice Poll. Voters: 8. You may not vote on this poll

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Old 10th March 2012, 01:50 PM   #1
renyrc is offline renyrc  Australia
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Join Date: Sep 2011
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Default Zaph Audio SB12.3 Build Thread

I have finally decided to go ahead and build a three way system which is the Zaph SB 12.3 kit.

Since there is no thread that I have seen that completely documents this build , I would like to start this thread which will useful to people who have a similar idea and gain help from more experienced members regarding improvements to the original in cabinet design & possibly crossover improvements.

From the time I originally saw SB 12.3 on Zaph audio more than 2 years ago I had wanted to build it.Now I have decided to pull the trigger & start the build.The objective is to have have a stereo pair to be used initially for music and later become the mains for a complete HT system using SB Acoustics drivers.

Iam based in Melbourne Australia, and would appreciate if fellow Aussie members could share their advice/ comments in procuring local supplies/hardware for this build.
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Old 10th March 2012, 03:35 PM   #2
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I think the SB12.3s should be a good speaker, but I'm not dying to build them and not just for aesthetic reasons...

Given your location, I'd be lining up to get an audition of these:

DIY Synergy horn

Personally.
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Old 10th March 2012, 05:59 PM   #3
_henry_ is offline _henry_  Australia
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hi,

speakerbug got jantzen inductors and caps. i think the jantzen is very good components.

hasaudio.co.nz got some nice cabinet dampings and necessary fittings for the cabinets.

cheers
henry
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Old 10th March 2012, 11:56 PM   #4
renyrc is offline renyrc  Australia
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Quote:
Originally Posted by _henry_ View Post
hi,

speakerbug got jantzen inductors and caps. i think the jantzen is very good components.
hasaudio.co.nz got some nice cabinet dampings and necessary fittings for the cabinets.

cheers
henry
Thanks I found that hasaudio has some good damping stuff, esp the eggcrate foam is priced good. Good to know about speakerbug though.
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Old 11th March 2012, 12:08 AM   #5
renyrc is offline renyrc  Australia
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Join Date: Sep 2011
Location: Melbourne
Hi RockLeeEv I had decided on the SB 12.3 as it would be easier to DIY or buy matching centres and surround .
eg. Centre Channels Speakers - Adelaide Speakers - Ascension
SB Acoustics :: REFERENCE DESIGNS
And the useful lower output of the mains will enable to build highly accurate subs like Rythmik which will increase the output as the operating range would be smaller.

Do you have any specific potential concerns against this build?
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Old 16th March 2012, 07:34 AM   #6
renyrc is offline renyrc  Australia
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Got the woofers. Plan to run the woofers open baffle until the rest of the stuff is ordered & ready. Would recommend Scott from Essential Audio esp for anyone in Melbourne.Delivery & followup were top notch.

These make the 5 inch SS revelator look absolutely tiny!

Regarding the cab construction planning to make the box in Plywood & veneer it . ( I have learn to veneer first ! ) I will soon post a sketch up of the speakers with an certain look I have in mind.


Cabinet construction queries.

1. I wonder if it would be o.k to build the front baffle of the cabinet tilted to align the drivers.

2. Can a transmission line box be designed with Zaphs Crossover? How big will be box be and would the crossover have to be modified?

3. Any inputs about what quality of ply to use & how thick ? Looks like Bunnings stock 12mm C/D ply costing $44 for 2.4 by 1.2 m. Any place where better quality ply can be bought at a good cost.? Does any one know where veneers are sold for good prices?
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Old 29th April 2012, 08:27 PM   #7
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Default starting the build myself im new to this site

purchased the woofers gonna order the rest this coming week have many projects ive done never used someone elses but i believe these will be a nice set to own and listen to. i will supply pictures as it comes available.
some of my projects can be viewed at thanenelsonconstruction.com gallery home theatre. im excited for peoples input and suggestions i am gonna upgrade series caps on mids i think and possible the inductors as most of the sounds comes from this area let me know what you think thanks
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Old 29th April 2012, 08:31 PM   #8
badman is offline badman  United States
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12mm is too little, unless you go double-thick on the front baffle and brace the box extremely well. That said, I'd take an extremely well braced 12mm wall box over a poorly braced 24mm box anyday.
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Old 23rd May 2012, 03:19 AM   #9
renyrc is offline renyrc  Australia
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Have purchased the rest of the parts from Madisound.I was overseas for a couple of months so could not work on this build.Will post pictures soon.

After going through Zaph's site again I gathered the answers for the first two cabinet questions.

As for the third question
"12mm is too little, unless you go double-thick on the front baffle and brace the box extremely well. "
I meant to use either 12mm double thickness or 24 mm ply or maybe mdf- still thinking about the pros & cons of each...

thanenelson - Iam going to use the Clarity PX caps on the midrange, sticking with the Clarity SA for the tweeter & Solen Cap for the Woofer....I find the SA cap to be good enough for the tweeter & upgrading further affects the price-performance ratio adversely.
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Old 23rd May 2012, 06:18 AM   #10
_henry_ is offline _henry_  Australia
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dmkforrest got nice finnish birch, u can download their pricelist on their site.
i think the prices are quite reasonable.

cheers
henry
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