why are old school amps worth so much? - Page 12 - diyAudio
Go Back   Home > Forums > General Interest > Car Audio

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 2nd March 2008, 01:44 AM   #111
jol50 is offline jol50  United States
diyAudio Member
 
Join Date: Nov 2007
Hey look, 'rare old school class A mono'!!!
200203510657

Sweet, a class A sub amp just what I want....
  Reply With Quote
Old 3rd March 2008, 08:18 PM   #112
diyAudio Member
 
Jonny Hotnuts's Avatar
 
Join Date: Dec 2007
Quote:
Hey look, 'rare old school class A mono'!!!
Sweet, a class A sub amp just what I want....
While I have never owned one I always thought Poweramper made a very nice looking (inside and out) amp. I dont know if they were worth a poop but the build is nice.
  Reply With Quote
Old 4th March 2008, 04:49 AM   #113
Clipped is offline Clipped  Thailand
diyAudio Member
 
Join Date: Mar 2005
Location: home
Send a message via MSN to Clipped
Quote:
Originally posted by EnvisionAudio

One of my latest car amp designs uses a booster supply that drives the SMPS MosFet gates at 15-16V to ensure snappy turn-on even with low input voltage.
i believe thats what orion does in the 2150sx...
  Reply With Quote
Old 6th March 2008, 04:52 PM   #114
jol50 is offline jol50  United States
diyAudio Member
 
Join Date: Nov 2007
Quote:
Originally posted by Jonny Hotnuts


While I have never owned one I always thought Poweramper made a very nice looking (inside and out) amp. I dont know if they were worth a poop but the build is nice.

Must be a good amp considering what it sold for. Maybe you run them in pairs?

I have a newish sony mobile ES made in japan amp, it seems to be built nicely too. They even labeled stuff on the board like what section of amp a spot is, all the voltages at jumpers, etc., and it is switchable to high current like an old SS amp. Can even disable the feedback, what ever that does it has many interesting features. I know little about them though excepting the fact that sony charges x10 for parts if you can't find them elsewhere. It says explod on it too, never seen an explod made in japan. It is huge for its wattage. I know the old sony japan amps are pretty good, but I still dislike the company for other reasons no matter what products they make.
  Reply With Quote
Old 6th March 2008, 07:09 PM   #115
shagone is offline shagone  United States
diyAudio Member
 
Join Date: Apr 2007
Quote:
Originally posted by jol50



Must be a good amp considering what it sold for. Maybe you run them in pairs?

I have a newish sony mobile ES made in japan amp, it seems to be built nicely too. They even labeled stuff on the board like what section of amp a spot is, all the voltages at jumpers, etc., and it is switchable to high current like an old SS amp. Can even disable the feedback, what ever that does it has many interesting features. I know little about them though excepting the fact that sony charges x10 for parts if you can't find them elsewhere. It says explod on it too, never seen an explod made in japan. It is huge for its wattage. I know the old sony japan amps are pretty good, but I still dislike the company for other reasons no matter what products they make.

Those mobile es amps were very nice amps. they are a night and day difference from the made in china explode amps out there. is yours the huge red one with the silver es badge on the top? any pics?
  Reply With Quote
Old 6th March 2008, 07:49 PM   #116
jol50 is offline jol50  United States
diyAudio Member
 
Join Date: Nov 2007
No pics yet, it is huge red with big thick fins only at rear. Has square gold explod/mobile ES badge on center top. Has curved alum cover/shroud at front to sort of cover wires and has LED in that for various things. Is rated 2x75 rms at 4 and can go to I think 360x1rms at 1 ohm. Controls on front under shroud. Side plates have little square vent holes in them. Yes, not like china explodes I have seen. It is big, I have a 1kw old class d that is about same size.

Oh wait, found a cheater pic xm7527:
Click the image to open in full size.
  Reply With Quote
Old 6th March 2008, 07:50 PM   #117
diyAudio Member
 
EnvisionAudio's Avatar
 
Join Date: Apr 2002
Location: Dayton, OH
Quote:
Originally posted by Clipped


i believe thats what orion does in the 2150sx...
Yes, in a way - Orion sometimes used a transformer-coupled FET drive in an oscillating topology. MTX used gate drive transformers, but it is not the same.
The only other company I've seen use a floating, switching supply for the power supply FETs is Zed in their newest amps (Gladius, etc).
__________________
DCX2496/DEQ2496 Car Audio Conversions
www.envisionelec.net
  Reply With Quote
Old 6th March 2008, 08:08 PM   #118
shagone is offline shagone  United States
diyAudio Member
 
Join Date: Apr 2007
Quote:
Originally posted by jol50
No pics yet, it is huge red with big thick fins only at rear. Has square gold explod/mobile ES badge on center top. Has curved alum cover/shroud at front to sort of cover wires and has LED in that for various things. Is rated 2x75 rms at 4 and can go to I think 360x1rms at 1 ohm. Controls on front under shroud. Side plates have little square vent holes in them. Yes, not like china explodes I have seen. It is big, I have a 1kw old class d that is about same size.

Oh wait, found a cheater pic xm7527:
Click the image to open in full size.

yah those are the ones. i remeber those coming out around 2000 or 2001. the last of the good sony mobile es line. $400 msrp!
  Reply With Quote
Old 6th March 2008, 08:14 PM   #119
diyAudio Member
 
Join Date: Jan 2008
At one point I had a Sony MobileES 75Wx2 (long time before Xplod... ; ) that was quite a robust little amp. It claimed 1ohm stability, but I got it to protect itself by paralleling a pair of 4ohm Orion XTR 10s. Lots of power at 2 and 4 ohms, though, and a nice gold coloured heatsink, with topmount controls! I like top controls...
  Reply With Quote
Old 6th March 2008, 08:28 PM   #120
jol50 is offline jol50  United States
diyAudio Member
 
Join Date: Nov 2007
It is supposed to be broke but it works so not sure what to do, guess I better run it under 2 ohms and see what it does maybe that is it. Very nice clean layout inside and all labeled. The SMD is all on the back side of board...boards as it has one PS, one output, and part of filters is on third. Offset is under 15mv IIRC. I've seen the old gold ES, yeah even jensen can do top controls but not that many do.
  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
Old school Hifonics amps ? Robcrx Car Audio 9 14th October 2012 12:26 AM
old school GS Designs C1000, C2000, C4000 Amps preston269 Car Audio 5 29th March 2008 05:55 PM
High voltage wrecked my old school amps Datsun510 Car Audio 10 19th February 2006 04:50 PM


New To Site? Need Help?

All times are GMT. The time now is 09:28 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