Acoustic guitar amp replacement speaker - Page 2 - diyAudio
Go Back   Home > Forums > Live Sound > Instruments and Amps

Instruments and Amps Everything that makes music, Especially including instrument amps.

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
Reply
 
Thread Tools Search this Thread
Old 31st May 2012, 01:06 PM   #11
AC439 is offline AC439  United States
diyAudio Member
 
Join Date: Jun 2007
Just want to report here that I ended up with the Micca and have great result. The only thing is the Micca is slightly bigger that the original so I had to do a little bit of wood work to make it fit and flush.

I also have other accordian style 8" speakers and when comparing to the HiFi rubber surround type speakers, they are slightly smaller in diameter, probably by 1/8" in diameter. I'm not sure if this difference is industry standard between rubber surround and accordian design.
  Reply With Quote
Old 12th September 2012, 06:02 PM   #12
diyAudio Member
 
Join Date: Sep 2012
Quote:
Originally Posted by AC439 View Post
Acoustic amp replacement speaker:-
I have been looking for good info for a few days to no avail. This forum has been searched as well.

I play acoustic guitar only. Half of the time I need amplification. I've two acoustic amps: 1) Acoustic AG30 & 2) Crate Taxi 15 portable amp.

The AG30 is perfect and I felt in love with it on first sight (first try) in GC. However, it is heavy and difficult to haul around. I bought the Crate battery amp used. It sounds terrible. The sealed lead-acid battery needs replacement so I decided to do overhaul on it.

Upon some troubleshooting, I finally isolated the poor sound quality to the speaker. It has accordian surround, like those used in electric guitar or PA system. I confirmed it by moving the coax speaker from the AG30 over to the Crate and the sound becomes fantastic. The speaker from the AG30 is studio monitor style with rubber surround and a coax tweeter that chimes ! The problem is when I went to Acoustic's site, they said they don't sell parts.

I have search internet for a few days and can't find many speakers for acoustic guitar amps. I'm a HiFi guy so the sound quality is ultimately important. I played through the home stereo as well so I know the HiFi speakers are very close to the acoustic amp speakers. But everywhere I read, people recommend against using HiFi speakers for guitar amps. I know the guitar amp speakers are designed to allow high power handling.

Pretty much the only choice officially with acoustic replacement speaker is Eminence CX2008. However, the freq response of the speaker is only up to 3.5khz. The acoustic guitar may then sound a little muted. The Crate also has a cheap tweeter (I think is piezo). If I go for the CX2008, then I have to get a different tweeter, either Eminence coax APT-50 or just put a tweeter separately. Also, the CX2008 is 8 ohms while the original speaker is 4 ohms.

So the problem is I don't have a choice. Either the Eminence CX2008 or just try my luck with HiFi speakers. I have noticed there are quite a few 8" ceiling coax speakers. Are those good candidates? What are your thoughts ?

Tks. - AC
I noticed your posting and wondered how your *experiment* with the TAXI amp mod came out? I have a TX30 and would like to improve the sound quality.

Thanks, in advance for any reply.
  Reply With Quote
Old 9th November 2013, 10:45 PM   #13
AC439 is offline AC439  United States
diyAudio Member
 
Join Date: Jun 2007
Quote:
Originally Posted by Walmusique View Post
I noticed your posting and wondered how your *experiment* with the TAXI amp mod came out? I have a TX30 and would like to improve the sound quality.

Thanks, in advance for any reply.
Sorry I've not checked my own thread for over a year. My reply is late but hope still useful to you.

I like the Micca speaker very much. It works perfectly. I have further mod'ed the amp by replacing all coupling capacitors with 2.2uF MKT type. Today I worked on the tone control circuit and replaced all three original caps (the originals were tiny caps, no bigger than the head of a match) in the tone control circuit with silver mica (2@) and one WIMA MKP. Every time I upgrade something, the amp sounds better. The amp now sounds very HiFi with my condenser mic with an ART tube preamp.

Now the last thing to be changed out is the input caps of the XLR circuit. The amp uses 10uF electrolytic non-polar caps. I can't find big enough MKT caps to replace them so I may have to parallel a few 2.2uF to make up the value. Being a 600 ohms circuit, the input caps are bigger than usual. I've searched here to no avail for info so I'm starting a new threat to ask for opinion.

How's your modding coming along ?
  Reply With Quote
Old 9th November 2013, 11:39 PM   #14
ChrisA is offline ChrisA  United States
diyAudio Member
 
Join Date: Jan 2008
Quote:
Originally Posted by AC439 View Post
..
Now the last thing to be changed out is the input caps of the XLR circuit. The amp uses 10uF electrolytic non-polar caps. I can't find big enough MKT caps to replace them so I may have to parallel a few 2.2uF to make up the value. Being a 600 ohms circuit, the input caps are bigger than usual. I've searched here to no avail for info so I'm starting a new threat to ask for opinion.

How's your modding coming along ?
If you need 10uF film caps that car called "motor start capacitors" They are large, typically inside steel cans with wire less.
  Reply With Quote

Reply


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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Portable Acoustic guitar/iPhone amp? Xerxes75 Instruments and Amps 1 8th April 2012 10:59 PM
Tube guitar amp for acoustic guitar? dagerman Tubes / Valves 15 6th April 2011 03:07 AM
Acoustic guitar amp pojk Instruments and Amps 13 7th January 2009 03:28 PM
guitar replacement speaker help kevlahnota Instruments and Amps 12 5th January 2006 09:15 PM


New To Site? Need Help?

All times are GMT. The time now is 10:16 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2