P3A vs LM4702 AMP's

benproiii · 15th May 2011, 09:57 PM

I Am debating on the p3A amp or a lm4702 amp.

i built a LM4702 amp with KSA1220A/KSC2690A drivers and 2SC5200/1943 outputs and i think it sounds really good.
some people say it is not that great, it sounds alot better than a TDA7294 amp i have (sharp and tinny).

What do you think about the sound quality of the P3A do you think it sounds better than the LM4702

do you know any other amps that tested/sound better than the P3A/LM4702

jon2xflash · 16th May 2011, 05:17 AM

i think dx amps may sound better...........

sakis · 16th May 2011, 09:25 AM

obviously there is no serious point on doing that ...then again alot has to do on the way you have builted the P3a ...

ostripper · 16th May 2011, 09:59 AM

KSA1220A/KSC2690A = not the best for drivers but it will most likely kick the pants off the p3a.

OS

benproiii · 16th May 2011, 10:41 AM

Why exactly are they not the best drivers they have a high hfe
Im only driving one pair of output transistors.

A dx amp is better than the p3a and lm4702?

wahab · 16th May 2011, 11:18 AM

It will be better because it has more power and this will
inevitably have an influence on the perception of the sound..

Other than that, there are very few amps by there that can
be qualified as high definition/high performances, and most
are not worth the effort since it would be better to use
an used 80s japanese amp and refresh it..

ostripper · 16th May 2011, 11:21 AM

Drivers can be MJE15030/31 -32/33-34/35 or 2sc4793/2sa1837 , better for more load on OP devices. MJE's are good to about 3 pair OP devices (heavy duty).

"Better" is subjective. What is better ? You must build more of them , decide for yourself. Symasym , all of DR. Jagodics (bora's) designs , my AX ... all very good. DX is most simple , no way to "mess up".

OS

benproiii · 16th May 2011, 10:46 PM

Im thinking about building the DX amp

is there any really noticeable sound quality difference between the standard dx and the the DX HRII.

saurus · 17th May 2011, 01:48 AM

As far as ESP's amps go, I have built the P3A and the P101 using Rod's pcbs, and I think the P101 sounds much better than the P3A.

sakis · 17th May 2011, 06:11 AM

small details for each and every amp mentioned above might cause al ot of diference choise and or combination of semis is one of them ...choise of other parts or choise of bias level

standard versions on standard pcb is something i have no expirience with so i have no opinion ....

as abouts OS's phrase most likely kick the pants off the p3a. i would troully like to see an amp that performs easily 100K square wave with the top corners just rounding up at 100 KHZ to be kicked out by something of the same range and simplicity to built ...

kind regards sakis

15th May 2011, 09:57 PM	#1
benproiii diyAudio Member Join Date: Aug 2010	P3A vs LM4702 AMP's I Am debating on the p3A amp or a lm4702 amp. i built a LM4702 amp with KSA1220A/KSC2690A drivers and 2SC5200/1943 outputs and i think it sounds really good. some people say it is not that great, it sounds alot better than a TDA7294 amp i have (sharp and tinny). What do you think about the sound quality of the P3A do you think it sounds better than the LM4702 do you know any other amps that tested/sound better than the P3A/LM4702

16th May 2011, 09:25 AM	#3
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	obviously there is no serious point on doing that ...then again alot has to do on the way you have builted the P3a ... __________________ SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr

16th May 2011, 09:59 AM	#4
ostripper diyAudio Member Join Date: May 2008 Location: Albany , NY (smallbany)	KSA1220A/KSC2690A = not the best for drivers but it will most likely kick the pants off the p3a. OS __________________ Mongrel website , always current and updated : http://67.248.209.21/D%3A/WEBSITE/

16th May 2011, 11:21 AM	#7
ostripper diyAudio Member Join Date: May 2008 Location: Albany , NY (smallbany)	Drivers can be MJE15030/31 -32/33-34/35 or 2sc4793/2sa1837 , better for more load on OP devices. MJE's are good to about 3 pair OP devices (heavy duty). "Better" is subjective. What is better ? You must build more of them , decide for yourself. Symasym , all of DR. Jagodics (bora's) designs , my AX ... all very good. DX is most simple , no way to "mess up". OS __________________ Mongrel website , always current and updated : http://67.248.209.21/D%3A/WEBSITE/

17th May 2011, 06:11 AM	#10
sakis diyAudio Member Join Date: Jan 2006 Location: nea makri athens greece	small details for each and every amp mentioned above might cause al ot of diference choise and or combination of semis is one of them ...choise of other parts or choise of bias level standard versions on standard pcb is something i have no expirience with so i have no opinion .... as abouts OS's phrase most likely kick the pants off the p3a. i would troully like to see an amp that performs easily 100K square wave with the top corners just rounding up at 100 KHZ to be kicked out by something of the same range and simplicity to built ... kind regards sakis __________________ SERVICE ΙΑΠΩΝΙΚΩΝ ΜΗΧΑΝΗΜΑΤΩΝ ΗΧΟΥ www.eastelectronics.gr


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16th May 2011, 05:17 AM	#2
jon2xflash diyAudio Member Join Date: May 2010 Location: cavite	i think dx amps may sound better...........

16th May 2011, 10:41 AM	#5
benproiii diyAudio Member Join Date: Aug 2010	Why exactly are they not the best drivers they have a high hfe Im only driving one pair of output transistors. A dx amp is better than the p3a and lm4702?

16th May 2011, 11:18 AM	#6
wahab diyAudio Member Join Date: Nov 2009 Location: algeria/france	It will be better because it has more power and this will inevitably have an influence on the perception of the sound.. Other than that, there are very few amps by there that can be qualified as high definition/high performances, and most are not worth the effort since it would be better to use an used 80s japanese amp and refresh it..

16th May 2011, 10:46 PM	#8
benproiii diyAudio Member Join Date: Aug 2010	Im thinking about building the DX amp is there any really noticeable sound quality difference between the standard dx and the the DX HRII.

17th May 2011, 01:48 AM	#9
saurus diyAudio Member Join Date: Aug 2002 Location: West of Boston	As far as ESP's amps go, I have built the P3A and the P101 using Rod's pcbs, and I think the P101 sounds much better than the P3A.

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