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

[harkpabst]

So that is a "Yes" to Q1 ?

How about 2 & 3 ?

I read your post to mean "these are not up to snuff"

Is that what you intended to imply?

I guess he was talking about something completely different, but failed to understand your first question.

I read this "right-person-in-right-place" analogy as a somewhat bad translation of a Japanese term for "the right tool for the right job", which implies that the PAMx5x amplifiers were not right for powering highly efficient midrange drivers and tweeters.

While I agree that a low power class-A or class-AB (with sufficient negative feedback) is well capable of driving a super tweeter compression HF driver, I'd just like to note that 3E AUDIO TPA325x based amplifiers perform pretty excellent in SNR testing. If we compare e.g. THD+N at 200 mW (which is totally noise dominated), the A5 an A7 models do remarkably well at ~ -90 dB. Few amplifiers measured by Amir did even better, but usually at the cost of much lower gain.

 

[john61ct]

My point exactly, sounded like disparaging the amps but not giving any reason I could decipher, even after repeated prompting.

Put it down to language issues I guess just let it lie

 

[Mamocel]

An interesting alternative... But no XLR inputs. And the heatsink fins are well oriented... I don't know which chip is used...

https://www.parts-express.com/Dayton-Audio-MA880-4-Zone-Amplifier-8Ch-X-80W-Class-D-6-Input-Distributed-Audio-300-774?quantity=1

 

[MGJ]

An interesting alternative... But no XLR inputs. And the heatsink fins are well oriented... I don't know which chip is used...

https://www.parts-express.com/Dayton-Audio-MA880-4-Zone-Amplifier-8Ch-X-80W-Class-D-6-Input-Distributed-Audio-300-774?quantity=1

View attachment 529446

Do they use Infineon class D chips? Some Infineon chips use the MA.xxxx designation.

 

[Mamocel]

Yes...maybe MA5332MS!

I like this chip...but nothing is certain.

 

[john61ct]

Let's start a new thread for different amps

 

[dualazmak]

....
I read this "right-person-in-right-place" analogy as a somewhat bad translation of a Japanese term for "the right tool for the right job", which implies that the PAMx5x amplifiers were not right for powering highly efficient midrange drivers and tweeters.
....
While I agree that a low power class-A or class-AB (with sufficient negative feedback) is well capable of driving a super tweeter compression HF driver, I'd just like to note that 3E AUDIO TPA325x based amplifiers perform pretty excellent in SNR testing. If we compare e.g. THD+N at 200 mW (which is totally noise dominated), the A5 an A7 models do remarkably well at ~ -90 dB. Few amplifiers measured by Amir did even better, but usually at the cost of much lower gain.

Thank you for your kind and nice follow-up; yes, I mean "the right gear/tool for the right job/place" for Japanese wordings of "right-person-in-right-place".
I will soon add some wordings in my post #294. Edit: done it!
Many thanks for you, again.

 

[falang]

I'm interested in one of these to simplify my home theater setup as I am currently running a stereo A7 and a mono A7 to power my fronts. But man, Ali Express is such a nightmare to navigate - especially on mobile. They must lose so much money to people not buying a product because they can't figure out exactly which product they are buying on the product page because they need to click on some poorly named thumbnail and hope it is the product variant they want.

3E Audio has to do a better job of organizing their store page!

 

[john61ct]

post a link to what you think is the precise SKU you're after

 

[falang]

post a link to what you think is the precise SKU you're after

Are the 6 or 8 channels available yet? Nobody knows. I'll wait to see if they show up on Amazon. I'd rather not deal with AliExpress anyway.

 

[harkpabst]

Are the 6 or 8 channels available yet? Nobody knows. I'll wait to see if they show up on Amazon. I'd rather not deal with AliExpress anyway.

There's not one single Amazon worldwide. I could by a PAM256 from Amazon if I had the need to, so I know this for sure.

 

[SOUNDMASTER]

I chose the PAM 154.

I selected the PAM 154 for its moderate output, intended primarily for desktop use.

My main speakers use banana plugs on both ends, but

I am unsure how to modify the PBTL banana plugs included with the amplifier.

If anyone has attempted a PBTL connection using these banana plugs, could you please upload a photo of the connection?

I am currently very confused and unable to understand the process.

 

[Guddu]

I am unsure how to modify the PBTL banana plugs included with the amplifier.

If anyone has attempted a PBTL connection using these banana plugs, could you please upload a photo of the connection?

I am currently very confused and unable to understand the process.

What's confusing - installing a wire to it?

 

[Roland68]

I chose the PAM 154.

I selected the PAM 154 for its moderate output, intended primarily for desktop use.

My main speakers use banana plugs on both ends, but

I am unsure how to modify the PBTL banana plugs included with the amplifier.

If anyone has attempted a PBTL connection using these banana plugs, could you please upload a photo of the connection?

I am currently very confused and unable to understand the process.

You've misunderstood something.
First of all, those are just regular banana plugs; there's no such thing as PBTL plugs or PBTL banana plugs.
And what exactly do you want to modify?

If your cables already have banana plugs, you can simply use those; you don't need to change anything.

You bought a 4-channel amplifier with four separate amplifier modules. Each module contains a TPA3251, which operates as a PBTL mono amplifier. There's nothing else that can be connected together.
Each module has a choice between RCA and XLR inputs. The outputs are standard 4mm jacks for all types of banana plugs, one positive (+) and one negative (-) for speaker connection.
And again, each module is separate from the others and cannot be connected together.

By the way, congratulations on this great amplifier!

 

[SOUNDMASTER]

You've misunderstood something.
First of all, those are just regular banana plugs; there's no such thing as PBTL plugs or PBTL banana plugs.
And what exactly do you want to modify?

If your cables already have banana plugs, you can simply use those; you don't need to change anything.

You bought a 4-channel amplifier with four separate amplifier modules. Each module contains a TPA3251, which operates as a PBTL mono amplifier. There's nothing else that can be connected together.
Each module has a choice between RCA and XLR inputs. The outputs are standard 4mm jacks for all types of banana plugs, one positive (+) and one negative (-) for speaker connection.
And again, each module is separate from the others and cannot be connected together.

By the way, congratulations on this great amplifier!

Ah, I was confused.

So, the PAM154 is already fixed to PBTL?

I was very confused because the term "PBTL" was unfamiliar to me.

On top of that, regarding the banana plugs sent by the manufacturer, I thought I had to make jumper wires out of them. ^^;;

Currently, I have connected the + and - terminals of the left speaker to the right speaker via the amplifier's first channel (Channel 1), and I am using the right speaker with its + and - terminals connected to the amplifier's second slot (Channel 2).

Does this mean PBTL is already applied?

Here are the specifications of my speakers. Max SPL output (1m)
108
Frequency response (-3dB)
45 Hz-23 kHz
Recommended amplifier power
30-150W
Nominal impedance
4 ohms
Sensitivity (2.83v at 1m)
86 dB

PBTL is still unfamiliar to me, so it's really confusing. ^^;;

 

[SOUNDMASTER]

What's confusing - installing a wire to it?

I posted a comment above ^^

 

[harkpabst]

Does this mean PBTL is already applied?

Exactly. Each amplifier module inside the PAM154 runs in PBTL mode.

If all you need is a two channel power amplifier for stereo, then the PAM152 would have been all you need.

 

[SOUNDMASTER]

Exactly. Each amplifier module inside the PAM154 runs in PBTL mode.

If all you need is a two channel power amplifier for stereo, then the PAM152 would have been all you need.

Thank you for your answer.

So, if I connect the left and right speakers to Channel 1 and Channel 2, it is PBTL stereo, right?

 

[Roland68]

Ah, I was confused.

So, the PAM154 is already fixed to PBTL?

I was very confused because the term "PBTL" was unfamiliar to me.

On top of that, regarding the banana plugs sent by the manufacturer, I thought I had to make jumper wires out of them. ^^;;

Currently, I have connected the + and - terminals of the left speaker to the right speaker via the amplifier's first channel (Channel 1), and I am using the right speaker with its + and - terminals connected to the amplifier's second slot (Channel 2).

Does this mean PBTL is already applied?

Here are the specifications of my speakers. Max SPL output (1m)
108
Frequency response (-3dB)
45 Hz-23 kHz
Recommended amplifier power
30-150W
Nominal impedance
4 ohms
Sensitivity (2.83v at 1m)
86 dB

PBTL is still unfamiliar to me, so it's really confusing. ^^;;

There's nothing to adjust on these amplifiers except SE/BAL and High/Low Gain.

The TPA3251 (and the 3255) are 4-channel amplifier ICs.
BTL is the configuration for stereo, and PBTL is the configuration for mono.
But basically, you don't need to worry about that, since nothing can be changed.
What's important for you is that these amplifiers, in PBTL configuration, can deliver the highest possible power while remaining stable at 2 ohms.

Currently, I have connected the + and - terminals of the left speaker to the right speaker via the amplifier's first channel (Channel 1)

There's something strange and unclear about the description.
I assume you have each speaker connected separately to a channel?

 

[SOUNDMASTER]

There's nothing to adjust on these amplifiers except SE/BAL and High/Low Gain.

The TPA3251 (and the 3255) are 4-channel amplifier ICs.
BTL is the configuration for stereo, and PBTL is the configuration for mono.
But basically, you don't need to worry about that, since nothing can be changed.
What's important for you is that these amplifiers, in PBTL configuration, can deliver the highest possible power while remaining stable at 2 ohms.


There's something strange and unclear about the description.
I assume you have each speaker connected separately to a channel?

I am currently using the PAM154 with a single power supply in a mono + mono = stereo configuration.

DX5II
Preamp Mode

PAM154 High Gain

Of the PAM154's channels 1, 2, 3, and 4,

I have connected the right speaker to Channel 1.
And I am using the left speaker on Channel 2.
Mono + Mono = Stereo