diyAudio

diyAudio (https://www.diyaudio.com/forums/index.php)
-   Solid State (https://www.diyaudio.com/forums/solid-state/)
-   -   Dayton APA 150 mods? (https://www.diyaudio.com/forums/solid-state/117918-dayton-apa-150-mods.html)

sbrtoy 21st February 2008 07:18 PM

Dayton APA 150 mods?
 
Anyone experiment with these little guys?

http://www.partsexpress.com/pe/showd...number=300-812

Can be had for almost nothing, just wondering if anyone has tried one out and has impressions of the sound and build quality...

If there is any half-decent parts in it is seems like a great modding candidate, and with the level control you could use it as a nice iPod system.

Any thoughts?

Stormrider 22nd February 2008 03:12 AM

Other than that its made by the same company that makes the small Emotiva amp (the one that looks exactly the same)... I haven't seen anything about this amp.

If anyone has one, post pics of the insides.

gni 5th December 2009 01:22 AM

I've been looking at this amp for possible mods
but I am stumped at the bridged configuration.

First there is a switch; but then you are to connect
the (+) left output to the (+) speaker and then the
(-) right output to the (-) speaker.

That just seems a little odd. . . .The right channel
must always be driven out of phase and the switch
just puts an input into both channels. Therefore the
(-) left output and the (+) right output are really the
ground reference.

I've never seen an amplifier labeled in this manner
but it would simplify some parts of the circuit design.

Anybody have further insight?

djk 6th December 2009 12:19 AM

Carver made several amps with one channel inverting and the speaker posts as you described. It's OK for bridging, but not the best from a stereo standpoint. Carver later discontinued this practice.

Rockford Fosgate also did this on most of their amplifiers too.

benchtester 6th December 2009 12:29 AM

Quote:

Originally Posted by sbrtoy (https://www.diyaudio.com/forums/solid-state/117918-dayton-apa-150-mods-post1434873.html#post1434873)
Anyone experiment with these little guys?

Parts-Express.com: Dayton APA150 150W Power Amplifier | Power amp subwoofer amp class AB amp stereo amp APA150 mono amp home theater amp sub amp low pass home theater audiophile 150 watt 150W gifts1117

Can be had for almost nothing, just wondering if anyone has tried one out and has impressions of the sound and build quality...

If there is any half-decent parts in it is seems like a great modding candidate, and with the level control you could use it as a nice iPod system.

Any thoughts?

I have one, but I am out-of-town, so no pictures for a while.

It does have a toroidal transformer, but only a square tube for a heat sink. Both the sound quality and part quality is okay but not real inspiring. I am thinking of one day upgrading the input amp to see if that helps. Many people have had problems with the volume pot, so that should be upgraded, or replaced by a stepped attenuator.

gni 6th December 2009 11:39 PM

That is good info about the volume pot. . . easily fixed.

Some inside pics will be nice. . . .knowing what's inside
before buying is a good start to mods. When you buy
a car, you always look at the engine also; I feel the same
way about equipment purchases. . . .

Zoodle 5th August 2013 03:40 AM

Anyone have a schematic? I want to remove the input board but it contains the bridge mode selector and the auto on sensor. Without the board, the amp defaults to standby. No idea about bridge mode. Anyone played with this amp, or have the circuit?

thehof 10th October 2016 04:37 PM

I'd really like to see some info on this too. Keep seeing generally good reviews on these and it seems like they'd be a good candidate for modding.

nuconz 6th December 2017 02:48 AM

so the idea just fell off the earth?

jerluwoo 6th December 2017 06:32 AM

Quote:

Originally Posted by gni (https://www.diyaudio.com/forums/solid-state/117918-dayton-apa-150-mods-post2002266.html#post2002266)
I am stumped at the bridged configuration.

First there is a switch; but then you are to connect
the (+) left output to the (+) speaker and then the
(-) right output to the (-) speaker.

That just seems a little odd. . . .The right channel
must always be driven out of phase and the switch
just puts an input into both channels. Therefore the
(-) left output and the (+) right output are really the
ground reference.

Anybody have further insight?

This is the way virtually all bridgeable car amplifiers are set up. Having the speaker outputs arranged like this makes the phase correct when in stereo operation if the right channel is inverting all the time. Perhaps the switch lets it require only one input so that two amps can be used for left and right.


All times are GMT. The time now is 10:14 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 17.65%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio

Wiki