Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Everything Else Anything related to audio / video / electronics etc) BUT remember- we have many new forums where your thread may now fit! .... Parts, Equipment & Tools, Construction Tips, Software Tools......

Small Portable 3" Speaker?
Small Portable 3" Speaker?
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 9th August 2012, 10:04 PM   #1
Entreated is offline Entreated  United Kingdom
diyAudio Member
Join Date: Aug 2012
Default Small Portable 3" Speaker?

I have been browsing these forums for some time, following projects, seeing different designs etc.

So I thought it was time I jumped in on the action and created a project of my own, by all means I don't know much about the DIY audio business but I am willing to learn and want to get stuck in.

I am looking to make a portable speaker with a 3" driver, I have been looking at the Monacor SPH-30X/8.

Things I am unsure about:
- Mono amplifier in order to power this driver (as most of the amplifiers I have seen only offer 2 channel, the only mono amplifiers kits I have seen are like 7W or less)
- How small the enclosure can be in order to still create a generous sound
- What rechargeable battery is recommended to power such a driver for say 10 hours+

All help will be appreciated.
Thanks in advanced.
  Reply With Quote
Old 10th August 2012, 06:32 PM   #2
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
Mooly's Avatar
Join Date: Sep 2007
Small Portable 3" Speaker?
Tough one to answer and I'm no expert on speaker design.

Small (and how small is small ) sealed enclosure usually means low bass output.

(I once had a small pair of rear satellite speakers intended for a car parcel shelf... probably was a 3" driver and the box was sealed and only around 4" square. Those speakers on the end of a 150 watt Pioneer A80 amplifier sounded amazing for what they were but they needed plenty of clean power).

A battery puts limits on things. 12Volt ? SLA type (small sealed lead acid). The voltage puts a limit on the power available into a given load. You can't get more than a couple of watts RMS into a typical speaker from that. A "bridged" amplifier increases that by 4 times (in theory), in practice probably less.

Some very knowledgable folk over on the single speaker forum,
Full Range - diyAudio

so perhaps a new thread there might help on the speaker design aspect.

With a battery you need to make the most of evey volt so efficiency counts. I suspect an audio amp (probably a suitable chip amp) intended for car use might be the best bet for amplification. I'm assuming 12 volts though as you didn't say. For music a small SLA battery would easily last 10 hours on a charge.
  Reply With Quote
Old 23rd May 2013, 09:37 AM   #3
speakermagic is offline speakermagic  Australia
diyAudio Member
Join Date: May 2013
Location: Perth
Sounds like a Minirig portable speaker MiniRig portable speaker Review - YouTube
  Reply With Quote
Old 23rd May 2013, 03:08 PM   #4
chris661 is offline chris661  United Kingdom
diyAudio Member
chris661's Avatar
Join Date: Feb 2008
Location: Sheffield
I'd be happy to provide some dimensions etc if you wanted to build this:

Portable speaker with HiWave BMRs

I've had friends asking me how much it was to build (probably ~80-100, didn't keep exact track), and then commenting that it sounds way better than anything you can buy for that money.

Its approximately the size of a medium box of tissues, but sounds better

I discuss battery choices and things like that in the thread, feel free to ask any questions here, on my thread, or via PM if you like.

Edit - just realised how old this thread is.

Last edited by chris661; 23rd May 2013 at 03:10 PM.
  Reply With Quote


Small Portable 3" Speaker?Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Need a 4" Coaxial speaker for Portable Boombox bnhoang228 Car Audio 22 25th November 2011 10:28 PM
Small 2 way "in desk" speaker build suggestions Ceri Multi-Way 19 31st August 2011 12:14 AM
Portable Speaker System "Zen Visionary" with Sonic T Amp Xspunge Class D 7 14th October 2006 08:25 PM
Mounting small speaker in 3/4" baffle Dave Jones Multi-Way 6 21st August 2004 01:14 PM

New To Site? Need Help?

All times are GMT. The time now is 11:44 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio