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Multi-channel Amp,Which one you would like to own?

Which one you would like to own?

  • Total voters
    53
  • Poll closed .
You now understand the actual intended meaning, give it a rest! Maybe get outside and touch some grass.

If you can't cut him some slack, maybe just exercise your right to personally boycott all these brilliant makers with less than perfect English language skills.
 
@3eaudio respectfully request optional purchase Dual VU Meter face plate for PAM252. Did you go to AXPONA this year?
 
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@3eaudio i'm your 1000 like on ASR ;)
still waiting on you properly updating your AE store with the new amps
1776139671690.png
 
Would like to provide clarification to better understand our product. Surely you can PM me directly for any questions.

The PAMx series is all modular design(1 module per channel), the biggest intention is for both serviceability and upgradability
  • Serviceability - easier for the customer to replace the failed channel only rather than replace the whole system.
  • Upgradability - upgradable for the customer, like 2 channels upgrade to 3ch, 6ch to 8ch, also looking at further upgrades if there is an updated version of TPA32xx like TPA3258? We just re-designed the module, customer no need to replace the entire product.
I had shared pictures clearly showing how they are designed and structured in the previous post.

www.audiosciencereview.com

Mulit-channel Amp,Which one you would like to own?

Thanks for model#s Best source would be directly from China probably Tariffs continue to be a risk
www.audiosciencereview.com www.audiosciencereview.com

I am sharing more info about the product design:
  • 2/3/4 ch use smaller chassis, 6/8 ch use bigger chassis, so ch q'ty upgrade limited on chassis(you can't upgrade from 4ch to 6ch).
  • 2/3/4 ch use 1 GaN Power supply,6/8 ch use 2 GaN Power supply, so here you can't exactly count the cost per channel, and we don't plan to use less cost and power SMPS in case the customer can upgrade in the future.
  • All PAM15x(TPA3251) use 38V output and PAM25x(TPA3255) use 48V output, SMPS platform is the same but the output voltage is set differently.
  • Is it possible to have one 38V SMPS house 1-4 modules with PAM15x and one 48V SMPS house 1-4 modules with PAM25x(this is only for 6/8 channel chassis), but we haven't considered this config yet, Looks like a customized feature set.
  • When will these modules be available, and is there a price yet? Modules are available but we haven't decided to sell them individually as the mechanical dimension is not standard for DIY users (you need our chassis or need the exactly drilled holes).
@Roland68 @daniboun @Guddu FYI
 
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OK besides my suggestions for improving the branding and aesthetics above

Give the option to buy your chassis at a relatively cheap price bare + PSU of choice (one or more, both the same or mixed)

And then however many modules are desired (both the same or mixed).

If you want, only sell the modules separately later on, to people that own your chassis already, but I advise better to just sell them freely to DIYers.

Sell the modules at "more profitable" pricing

Sell all the other components for prices that net you lower profits, so I am encouraged to invest in a bigger chassis than what I need right now, and then buy more bare modules when I need them later.
 
3eaudio said:
Would like to provide clarification to better understand our product. Surely you can PM me directly for any questions.

The PAMx series is all modular design(1 module per channel), the biggest intention is for both serviceability and upgradability
  • Serviceability - easier for the customer to replace the failed channel only rather than replace the whole system.
  • Upgradability - upgradable for the customer, like 2 channels upgrade to 3ch, 6ch to 8ch, also looking at further upgrades if there is an updated version of TPA32xx like TPA3258? We just re-designed the module, customer no need to replace the entire product.
I had shared pictures clearly showing how they are designed and structured in the previous post.

www.audiosciencereview.com

Mulit-channel Amp,Which one you would like to own?

Thanks for model#s Best source would be directly from China probably Tariffs continue to be a risk
www.audiosciencereview.com www.audiosciencereview.com

I am sharing more info about the product design:
  • 2/3/4 ch use smaller chassis, 6/8 ch use bigger chassis, so ch q'ty upgrade limited on chassis(you can't upgrade from 4ch to 6ch).
  • 2/3/4 ch use 1 GaN Power supply,6/8 ch use 2 GaN Power supply, so here you can't exactly count the cost per channel, and we don't plan to use less cost and power SMPS in case the customer can upgrade in the future.
  • All PAM15x(TPA3251) use 38V output and PAM25x(TPA3255) use 48V output, SMPS platform is the same but the output voltage is set differently.
  • Is it possible to have one 38V SMPS house 1-4 modules with PAM15x and one 48V SMPS house 1-4 modules with PAM25x(this is only for 6/8 channel chassis), but we haven't considered this config yet, Looks like a customized feature set.
  • When will these modules be available, and is there a price yet? Modules are available but we haven't decided to sell them individually as the mechanical dimension is not standard for DIY users (you need our chassis or need the exactly drilled holes).
@Roland68 @daniboun @Guddu FYI
Click to expand...
This clarifies lots of questions asked in the thread, thanks @3eaudio
 
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I can't find the information. What are the case dimensions of these amplifiers?
 
3eaudio said:
Upgradability - upgradable for the customer, like 2 channels upgrade to 3ch, 6ch to 8ch, also looking at further upgrades if there is an updated version of TPA32xx like TPA3258?
Click to expand...

TPA325X to TPA3258 makes sense for Upgradability, nice to read )
But still wondering how you can upgrade a 2 channels to 3 or more channels since the stock PSU of 2 channels is less powerful (Unless the GaN PSU is 10A) ?

If I understand correctly from reading the manual, only amps with more than 6 channels can accommodate two additional modules for a total of 8 channels.
I quote :

"user can upgrade from 6 channel to 8 channel by just adding 2 extra amplifier modules.each module design implemented one TPA3251/5 chipset configurated as PBTL model, reduce theoutput impedance and increase the efficiency, achieving maximum audio performance, can supportvariable speaker impedance down to 2ohm (equal to 34A driving current capability)."


Thanks
 

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daniboun said:
TPA325X to TPA3258 makes sense for Upgradability, nice to read )
But still wondering how you can upgrade a 2 channels to 3 or more channels since the stock PSU of 2 channels is less powerful (Unless the GaN PSU is 10A) ?

If I understand correctly from reading the manual, only amps with more than 6 channels can accommodate two additional modules for a total of 8 channels.
I quote :

"user can upgrade from 6 channel to 8 channel by just adding 2 extra amplifier modules.each module design implemented one TPA3251/5 chipset configurated as PBTL model, reduce theoutput impedance and increase the efficiency, achieving maximum audio performance, can supportvariable speaker impedance down to 2ohm (equal to 34A driving current capability)."


Thanks
Click to expand...
There is only one power supply available for these devices: one with 38 volts and one with 48 volts.
Each power supply is always responsible for four modules.
3E Audio has also explicitly stated that they will not use cheaper or weaker power supplies, so that buyers can upgrade at any time.

3eaudio said:
  • 2/3/4 ch use smaller chassis, 6/8 ch use bigger chassis, so ch q'ty upgrade limited on chassis(you can't upgrade from 4ch to 6ch).
  • 2/3/4 ch use 1 GaN Power supply,6/8 ch use 2 GaN Power supply, so here you can't exactly count the cost per channel, and we don't plan to use less cost and power SMPS in case the customer can upgrade in the future.
  • All PAM15x(TPA3251) use 38V output and PAM25x(TPA3255) use 48V output, SMPS platform is the same but the output voltage is set differently.
  • Is it possible to have one 38V SMPS house 1-4 modules with PAM15x and one 48V SMPS house 1-4 modules with PAM25x(this is only for 6/8 channel chassis), but we haven't considered this config yet, Looks like a customized feature set.
  • When will these modules be available, and is there a price yet? Modules are available but we haven't decided to sell them individually as the mechanical dimension is not standard for DIY users (you need our chassis or need the exactly drilled holes).
Click to expand...
 
Roland68 said:
There is only one power supply available for these devices: one with 38 volts and one with 48 volts.
Each power supply is always responsible for four modules.
3E Audio has also explicitly stated that they will not use cheaper or weaker power supplies, so that buyers can upgrade at any time.
Click to expand...
Roland68 said:
There is only one power supply available for these devices: one with 38 volts and one with 48 volts.
Each power supply is always responsible for four modules.
3E Audio has also explicitly stated that they will not use cheaper or weaker power supplies, so that buyers can upgrade at any time.
Click to expand...
Since we don't have details on the power of the GaN PSUs, we can only imagine that to control 3 or more modules, a very powerful 38V or 48V PSU (depending on the models) will be needed.
Logically, if it can do the most, it can do the least... But @3eaudio will confirm this for us soon, won't they?
 
1776165544317.png

So, these are basically incompatible with a normal (19") rack?

EDIT: This made me go from "very interested" to "zero interest". I cannot build a non-standard rack for an exotic choice of dimensions.
 
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olieb said:
View attachment 524714
So, these are basically incompatible with a normal (19") rack?
Click to expand...


If you need a rack-mountable TPA325X-based amplifier in a 19" rack, there's the excellent Topping RA3, which has unfortunately fallen somewhat into obscurity...
He has excellent measurements!

1776168477489.png



www.audiosciencereview.com

TP RA3 Rackmount Amplifier Review

This is a review and detailed measurements of the TP (Topping) RA3 stereo balanced rackmount amplifier. It was sent to me by the company and costs US $229. Yes, this is a new sub-brand from Topping. I quite like it. The large and highly visible volume level is as gorgeous to look at as it is...
www.audiosciencereview.com www.audiosciencereview.com
 

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harkpabst said:
You're probably right, but the fact sheet is clear (if you know the specs of the TPA chips).

Since we are dealing with Multi-Channel amps I should have been a little more precise:
Support for and full power down to 2 ohms requires one TPA325x chip per channel.
=>
PAMx52: 2 TPA chips
PAMx53: 3 TPA chips
PAMx54: 4 TPA chips
PAMx56: 6 TPA chips
... and so on.
Click to expand...

Each channel is configured as PBTL (parallel bridge-tied load) mode, means two half-bridges are placed in parallel to supply twice the current and reduce the RDS(on), or on
resistance of the output MOSFETs. This provides greater output power and efficiency (from the data sheet)
 
Mamocel said:
will require horizontal ventilation
Click to expand...
(my bold)

not if the cooling in it's current form keeps the devices cool enough. That can only be determined by detailed thermal tests which I am assuming has been done by the manufacturer.
 
Roland68 said:
They did it exactly right, and the heatsink is oriented correctly.
With an amplifier, it's not about maximizing convection, but about achieving the most consistent convection possible, one that adapts to the power output. The amplifier also needs to maintain a minimum operating temperature to meet its temperature-dependent operating point.

The overall design of the enclosure should also be considered. Cold air rises through the ventilation slots throughout the enclosure and is expelled through the vents on the back, passing directly by the amplifier's heatsinks. The more heat builds up inside the enclosure, the more convection naturally increases, directing the air directly past the amplifier's fins.

It's as if anyone actually put any thought into developing a good cooling concept ;) .
Click to expand...
I disagree. In this specific case, radiators arranged this way will require horizontal ventilation (i.e., forced ventilation... with a fan).

Your explanation seems completely irrational to me. I've opened hundreds of amplifiers... and I've never seen anything like it... ;)
 
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